2026-05-17T05:38:22Z https://ejournal.undip.ac.id/index.php/index/oai

oai:ojs.ejournal.undip.ac.id:article/27136 2021-02-01T08:05:53Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/27136 2021-02-01T08:05:53Z Buletin Oseanografi Marina Vol 9, No 2 (2020): Buletin Oseanografi Marina; 157-165 Mariyati, Titik; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Endrawati, Hadi; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Supriyantini, Endang; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2020-10-15 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/27136 parameter lingkungan; zooplankton; Pantai Morosari id Zooplankton berperan sebagai konsumen tingkat pertama, yaitu memindahkan energi dari produsen ke konsumen tingkat dua. Zooplankton dapat digunakan sebagai bahan kajian untuk mengetahui kualitas dan kesuburan suatu perairan yang sangat diperlukan untuk mendukung pemanfaatan sumberdaya pesisir dan laut. Perairan Morosari mengalami degradasi akibat rob dan berkurangnya tanaman mangrove Penelitian ini bertujuan untuk mengetahui hubungan parameter kualitas air dengan kelimpahan zooplankton di Perairan Pantai Morosari, Demak. Penelitian menggunakan metode survei dan penentuan lokasi dipilih dengan menggunakan metode purposive sampling, analisis data meliputi kelimpahan, indeks keanekaragaman, keseragaman, dominasi dan analisis hubungan. Hasil penelitian menunjukkan bahwa nilai korelasi parameter kualitas air yaitu 0,799 (DO), 0,928 (suhu), 0,758 (salinitas), -0,019 (pH), -0,318 (arus). Berdasarkan hasil pengamatan parameter kualitas air terutama DO, suhu, dan salinitas mempunyai kaitan yang erat terhadap kelimpahan zooplankton di perairan Pantai Morosari. Zooplankton acts as the first level consumer, i.e. transferring energy from producers to second level consumers, zooplankton can be used as study material to find out the quality and fertility of water that is needed to support the use of coastal and marine resources. This study aims to determine the abundance of zooplankton, the types of zooplankton and the relation of water quality parameters with the abundance of zooplankton in Morosari Coastal Water, Demak. Research using methods of surveying and determining the location was chosen using the purposive sampling method, data analysis includes abundance, diversity index, uniformity, dominance, and relationship analysis. The results showed that correlation value between water parameters and abundance of zooplankton is 0,799 (DO), 0,928 (temperature), 0,758 (salinity), -0,019 (pH), -0,138 (current). Based on the results of the water quality parameters, especially DO, temperature, and salinity have a close relationship to the abundance of zooplankton in the waters of Morosari Beach.

oai:ojs.ejournal.undip.ac.id:article/59689 2024-07-04T18:54:21Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/59689 2024-07-04T18:54:21Z Buletin Oseanografi Marina Vol 13, No 2 (2024): Buletin Oseanografi Marina; 239-249 Windupranata, Wiwin; Kelompok Keahlian Hidrografi, Fakultas Ilmu dan Teknologi Kebumian, Institut Teknologi Bandung Nusantara, Candida Aulia De Silva; Departemen Teknik Geodesi dan Geomatika, Fakultas Teknik Sipil, Perencanaan dan Kebumian, Institut Teknologi Sepuluh November Nuraghnia, Alqinthara; Kelompok Keahlian Hidrografi, Fakultas Ilmu dan Teknologi Kebumian, Institut Teknologi Bandung 2024-06-05 22:58:08 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/59689 Laut Jawa; TPXO; tunggang pasut; tipe pasut id Pasang surut (pasut) merupakan fenomena periodik naik turunnya air laut yang berpengaruh besar terhadap seluruh aktifitas manusia di wilayah pesisir dan laut. Tulisan ini menganalisis variasi spasial dari karakteristik pasut yang terjadi di Laut Jawa. Karakteristik pasut tersebut dipetakan dari empat komponen pasut utama (K1, O1, M2 dan S2) dari model pasut global TPXO9v5 dan diverifikasi menggunakan 14 stasiun pasut dari Badan Informasi Geospasial. Hasil verifikasi menunjukkan kesesuaian yang baik antara data model dengan data pengukuran dengan rata-rata nilai RMS 0,8 – 2,2 cm untuk komponen pasut dan 7,6 cm untuk tunggang pasut, sementara tingkat kesesuaian untuk tipe pasut adalah 93%. Nilai amplitudo komponen pasut pada kelompok harian (K1 dan O1) memiliki nilai lebih besar sekitar dua kali lipat dibandingkan dengan kelompok harian ganda (S2 dan M2). Sementara untuk nilai fase, hanya gelombang O1 yang penjalarannya ke arah timur, sementara gelombang lainnya menjalar ke arah barat. Secara spasial, tunggang pasut di Laut Jawa bervariasi dari 0,3 m di bagian tengah pada bujur 108-110° BT dan bertambah tinggi ke arah barat dan timur sampai 1 m. Pengetahuan mengenai variasi spasial karakteristik pasut ini penting dalam mempelajari pola pasut, bidang referensi ketinggian atau kedalaman, atau untuk kerekayasaan seperti manajemen pelabuhan dan instalasi infrastruktur lepas pantai.  Tides are a periodic rising and falling sea level phenomenon that significantly impact all human activities in coastal and maritime regions. This paper discusses the spatial variations of tidal characteristics tides in the Java Sea. The characteristics are mapped from four main tidal components (K1, O1, M2, and S2) extracted from the TPXO9v5 tide model and verified by 14 tidal stations. The verifications show a good agreement between the model data and measurements, with an average root mean square (RMS) of 0.8 - 2.2 cm for tidal components and 7.6 cm for tidal range, and the conformity level for tidal types is 93%. The amplitude of the diurnal tidal components (K1 and O1) is approximately twice that of the semi-diurnal tidal components (S2 and M2). Regarding the phase, only the O1 wave propagates eastward, while the other waves propagate westward. Spatially, the tidal range in the Java Sea varies from 0.3 m in the central part at longitudes 108-110° E, increasing in height as it moves westward and eastward to reach 1 m. Information on the spatial variations in tide characteristics is crucial for studying tidal patterns, tidal datum, and engineering purposes like port management and offshore infrastructure.

oai:ojs.ejournal.undip.ac.id:article/11216 2020-04-17T12:01:26Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/11216 2020-04-17T12:01:26Z Buletin Oseanografi Marina Vol 3, No 1 (2014): Buletin Oseanografi Marina; 32-36 Maulana, M Husni; Fakultas Perikanan dan Ilmu Kelautan UNDIP Maslukah, Lilik; Fakultas Perikanan dan Ilmu Kelautan UNDIP Wulandari, Sri Yulina; Fakultas Perikanan dan Ilmu Kelautan UNDIP 2014-01-03 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/11216 en Fosfat merupakan senyawa kimia yang memiliki peranan penting dalam pertumbuhan dan perkembangan biota laut. Organisme utama yang memerlukan keberadaan unsur fosfat di perairan adalah fitoplakton. Bahan organik merupakan kumpulan senyawa organik yang sedang atau telah mengalami proses dekomposisi. Sedimen dapat menjadi tempat penyimpinan senyawa kimia di laut hasil akumulasi dari senyawa di kolom air yang kemudian mengendap di dasar perairan, oleh karena itu kandungan fosfat dan karbon organik di dasar perairan mempunyai nilai yang lebih tinggi dibandingkan di permukaan. Penelitian ini bertujuan untuk mengetahui kandungan fosfat dan karbon organik total (KOT) pada sedimen dasar di Muara Sungai Manyar Kabupaten Gresik. Metode yang digunakan dalam penelitian ini adalah metode deskriptif, dan pengambilan sampel menggunakan metode purposive sampling. Hasil penelitian menunjukkan bahwa kandungan fosfat berkisar antara 76,743 mg/kg – 117,809 mg/kg, dan kandungan KOT berkisar antara 83 gr/kg (8,3%) – 123 gr/kg (12,3%). Nilai kandungan fosfat lebih dipengaruhi oleh sumber masukan yang berasal dari industri pupuk, sedangkan nilai kandungan KOT lebih dipengaruhi oleh sumber masukan dari sungai dan lokasi yang berada disekitar tanaman mangrove. Kata Kunci : Fosfat, Karbon Organik, Sedimen Dasar, Muara Sungai Manyar Gresik  

oai:ojs.ejournal.undip.ac.id:article/38964 2021-09-19T19:04:11Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/38964 2021-09-19T19:04:11Z Buletin Oseanografi Marina Vol 10, No 3 (2021): Buletin Oseanografi Marina; 291-298 Suprijanto, Jusup; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Senduk, Juwita Lesly; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Makrima, Dewi Basthika; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2021-09-20 02:02:43 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/38964 Mikroplastik; Cumi - cumi; Makarel; TPI; Semarang id Mikroplastik adalah salah satu pencemar laut. Mikroplastik tidak dapat terdegradasi dengan cepat. Mikroplastik merupakan partikel plastik yang berukuran <5mm. Ukurannya yang kecil menyebabkannya dapat tertransportasikan ke seluruh tempat termasuk sistem tubuh ikan dan cumi-cumi. Penelitian dilakukan bertujuan mengetahui mikroplastik pada cumi – cumi (Loligo sp.) dan ikan kembung (Rastrelliger sp.). Penelitian dilakukan bulan Juli 2020 – November 2020 di Semarang Jawa Tengah. Pengambilan sampel dilakukan di TPI Tambak Lorok Semarang.  Pengukuran cumi-cumi dilakukan menggunakan jangka sorong dan ikan diukur menggunakan penggaris. Pembedahan cumi-cumi dan ikan dilakukan menggunakan gunting bedah untuk memisahkan alat pencernaan, tentakel serta insang ikan yang akan digunakan sebagai sampel. Pelarutan dilakukan menggunakan perendaman KOH 10% selama 24 jam untuk melarutkan bahan organik. Pemisahan partikel mikroplastik dilakukan setelah seluruh bahan organik pada sampel larut seluruhnya. Pemisahan partikel mikroplastik dilakukan menggunakan perendaman ZnCl2 selama 24 jam. Penyaringan sampel dilakukan setelah sampel mempunyai 2 layer, layer pertama diambil 10 ml kemudian disaring menggunakan kertas whatman dengan vacump pump. Sampel yang telah disaring dikeringkan, dilanjutkan uji FTIR. Hasil penelitian menunjukkan bahwa terdapat mikroplastik dalam cumi – cumi dan ikan kembung yang ada di TPI Tambak Lorok Semarang, FTIR menunjukkan terdapat polimer plastik jenis nitrile dan nylon. Microplastic is one of the pollutants of the sea. Microplastics do not degrade quickly. Microplastics are plastic particles <5mm in size. Its small size allows it to be transported all over the place including the body systems of fish and squid. The research was conducted to determine the microplastics in squid (Loligo sp.) And mackerel fish (Rastrelliger sp.). The research was conducted in July 2020 - November 2020 in Semarang, Central Java. Sampling was carried out at TPI Tambak Lorok Semarang. Measurements of squid were carried out using a caliper and fish were measured using a ruler. Squid and fish surgery is performed using surgical scissors to separate the digestive organs, tentacles and fish gills that will be used as samples. Dissolving was carried out using 10% KOH immersion for 24 hours to dissolve organic matter. The separation of microplastic particles is carried out after all the organic material in the sample is completely dissolved. The separation of microplastic particles was carried out using ZnCl2 immersion for 24 hours. Filtering of the sample is carried out after the sample has 2 layers, 10 ml of the first layer is taken then filtered using Whatman paper with a vacump pump. The filtered sample was dried, followed by the FTIR test. The results showed that there were microplastics in the squid and mackerel in Tambak Lorok Semarang, FTIR showed that there were plastic polymers of nitrile and nylon types. 

oai:ojs.ejournal.undip.ac.id:article/62777 2026-02-11T04:53:31Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/62777 2026-02-11T04:53:31Z Buletin Oseanografi Marina Vol 14, No 1 (2025): Buletin Oseanografi Marina; 90-100 Tagore, Rafa Fahrezi; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Helmi, Muhammad; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Satriadi, Alfi; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Khoirunnisa, Hanah; Pusat Riset Teknologi Hidrodinamika, Badan Riset dan Inovasi Nasional Ismanto, Aris; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2025-02-20 05:07:27 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/62777 Pemodelan; Tsunami; TUNAMI; Perairan Selatan Bali id Pulau Bali merupakan wilayah yang memiliki potensi bencana alam seperti gempa bumi dan tsunami karena terletak di zona subduksi pertemuan lempeng Indo-Australia dengan lempeng Eurasia dan zona sesar belakang Flores. Kejadian tsunami telah terjadi di wilayah selatan Bali akibat dari bencana gempa Sumbawa (1977) dan gempa Banyuwangi (1994). Kajian terkait karakteristik dan run-up gelombang tsunami masih jarang dilakukan. Penelitian ini dilakukan dengan tujuan untuk mengetahui karakteristik dan run-up gelombang tsunami menggunakan pemodelan hidrodinamika 2D. Simulasi dilakukan menggunakan skenario gempa terburuk dengan kekuatan magnitudo 9,0 melalui model TUNAMI F1 dan TUNAMI N3. Hasil dari penelitian ini menunjukkan bahwa gelombang tsunami yang menjalar dari episenter menuju pesisir selatan Bali memiliki karakteristik waktu tempuh berkisar antara 16 menit 5 detik hingga 30 menit 35 detik dengan tinggi gelombang maksimum berkisar antara 11,113 – 34,446 m. Waktu tempuh penjalaran tercepat dengan tinggi gelombang tertinggi terdapat pada titik observasi Uluwatu dan Pandawa karena jarak yang dekat dengan episenter. Limpasan gelombang yang masuk ke daratan pesisir selatan Pulau Bali mampu menjangkau daratan hingga kisaran 257 – 3140 m dengan limpasan terjauh pada titik observasi Kuta karena morfologi pantai berpasir yang landai, sedangkan Uluwatu dan Pandawa menerima limpasan yang paling sedikit karena morfologi pantai yang berbatu dan tebing curam.

oai:ojs.ejournal.undip.ac.id:article/15744 2020-04-17T12:03:57Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/15744 2020-04-17T12:03:57Z Buletin Oseanografi Marina Vol 6, No 1 (2017): Buletin Oseanografi Marina; 61-68 Wijayanti, Diah Permata; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Charismawaty, Ayu; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Indrayanti, Elis; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Trianto, Agus; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2017-08-28 16:35:24 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/15744 Pertumbuhan; Tingkat Kelangsungan Hidup; Karang Lunak; Sarcophyton sp.; Growth; Survival Rate; Soft Coral id Upaya budidaya karang lunak di Indonesia masih kurang berkembang, terutama karang lunak yang bernilai jual tinggi. Sarcophyton adalah salah satu karang lunak yang sering dimanfaatkan sebagai pengisi akuarium. Namun seringkali produk yang dipasarkan berasal dari alam. Penemuan berbagai manfaat Sarcophyton sebagai kandidat bahan obat, turut menurunkan keberadaan keberadaan Sarcophyton di alam. Penelitian ini bertujuan untuk mengetahui pertumbuhan dan kelangsungan hidup fragmen karang lunak Sarcophyton sp. di perairan Teluk Awur, Jepara. Eksperimen dilakukan dengan menggunakan rancangan acak lengkap. Penelitian menggunakan fragmen dengan luas awal ≈10-12 cm2 dan >12-15 cm2. Hasil penelitian menunjukkan tingkat kelangsungan hidup karang lunak Sarcophyton sp. berkisar antara 63,64–77,78%. Pertumbuhan tertinggi ditemukan pada fragmen dengan luas awal ≈10-12 cm2 yakni sebesar 74,68±19,84 cm2 dengan laju pertumbuhan total 0.47 cm2/hari. Pertumbuhan terendah terlihat pada fragmen dengan luas awal >12-15 cm2 yakni sebesar 60,41±22,96 cm2 dengan laju pertumbuhan total 0.38 cm2/hari. Ukuran luas awal fragmen ≈10-12 cm2 memiliki pertumbuhan yang lebih besar dibandingkan dengan fragmen karang lunak dengan ukuran  luas awal >12-15 cm2. Efforts to soft coral cultivation in Indonesia are still underdeveloped, especially soft corals with high selling value. Sarcophyton is one of the soft coral that is often used as an aquarium ornament. But often the marketed products come from nature. The discovery of various benefits of Sarcophyton as a candidate ingredient of drugs, helped reduce the existence of Sarcophyton in nature. This study aims to determine the growth and survival of soft coral fragments Sarcophyton sp. in the waters of Awur Bay, Jepara. The experiment was performed using a complete randomized design. The study used fragments with an initial area ≈10-12 cm2 and >12-15 cm2. The results showed the soft coral survival rate of Sarcophyton sp. ranged from 63.64 to 77.78%. The highest growth was found in fragments with an initial area of ≈10-12 cm2i.e of 74.68 ± 19.84 cm2 with a total growth rate of 0.47 cm2 / day. The lowest growth was seen in fragments with an initial area of > 12-15 cm2, which was 60.41 ± 22.96 cm2 with a total growth rate of 0.38 cm2 / day. The size of the initial fragment ≈10-12 cm2 has a larger growth compared to soft coral fragments with an initial baseline size > 12-15 cm2.

oai:ojs.ejournal.undip.ac.id:article/45437 2023-01-25T06:05:53Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/45437 2023-01-25T06:05:53Z Buletin Oseanografi Marina Vol 11, No 3 (2022): Buletin Oseanografi Marina; 282-290 Tarya, Ayi; Department of Oceanography, Faculty of Earth Sciences and Technology, Institut Teknologi Bandung Yasna, M. Faiq; Program Studi Oseanografi, Fakultas Ilmu dan Teknologi Kebumian, Institut Teknologi Bandung Radjawane, Ivonne M.; Program Studi Oseanografi, Fakultas Ilmu dan Teknologi Kebumian, Institut Teknologi Bandung Sutiyoso, Hanif S.; Program Studi Oseanografi, Fakultas Ilmu dan Teknologi Kebumian, Institut Teknologi Bandung 2022-10-01 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/45437 Komponen Pasang Surut; Ketidaksimetrian; Amplitudo; Fase; Delta Berau id Karakteristik gelombang pasang surut akan mengalami transformasi ketika menjalar dari laut lepas ke perairan dangkal seperti pesisir pantai, estuari dan delta. Penelitian ini bertujuan untuk mengkaji transformasi elevasi pasang surut dari hilir ke hulu di Delta Berau meliputi komponen pasang surut utama semidiurnal dan diurnal (M2, S2, K1, dan O1), serta komponen pasang surut perairan dangkal M4 dan MS4. Metode analisis harmonik pasang surut menggunakan program T-TIDE di empat lokasi titik pengamatan (Tanjung Redeb, Batu Batu, Semanting dan Muara Tumbuk). Data elevasi pasang surut yang digunakan merupakan hasil observasi data lapangan pada waktu pengukuran dari 31 Mei – 27 September 2007. Hasil penelitian diperoleh bahwa amplitudo elevasi pasang surut mengalami peredaman dari arah hilir menuju hulu delta, komponen pasang surut semidiurnal M2 dan S2 berkurang 25%. Amplitudo komponen pasang surut diurnal O1 dan K1 berkurang 22%, sedangkan amplitudo komponen pasang surut perairan dangkal (M4 dan MS4) bertambah 370% dan 220% dari hilir ke hulu delta. Ketidaksimetrisan pasang surut diperlihatkan dengan perbedaan durasi waktu ketika menuju pasang (4-5 jam) dan menuju surut (7-8 jam) di Tanjung Redeb. Rasio amplitudo M4 dan M2 (Ar) diperoleh nilainya bertambah dari hilir ke hulu, dengan rasio maksimum bernilai 0,1 di Tanjung Redeb. The characteristics of tidal waves will transform when they propagate from the open sea to shallow water such as coast, estuary and delta. The present study aims to examine the tidal transformation from downstream to upstream in the Berau Delta, including the main tidal components of semidiurnal and diurnal (M2, S2, K1, and O1), as well as the tidal components of shallow waters M4 and MS4 are using the T-TIDE harmonic analysis method at 4 locations (Tanjung Redeb, Batu Batu, Semanting dan Muara Tumbuk). The tidal elevations were obtained from field observations in the period from May 31 to September 27, 2007. The results showed that the tidal elevation amplitude decreased from downstream to upstream of the delta, and the M2 and S2 semidiurnal tidal components decreased by 25%. The amplitude of diurnal tidal components O1 and K1 decreased by 22%, while the amplitude of shallow water tidal components (M4 and MS4) increased by 370% and 220% from downstream to upstream of the delta. Tidal asymmetry is indicated by the difference in the duration of high tides (4-5 hours) and low tides (7-8 hours) in Tanjung Redeb, and the difference in duration of high and low tides decreases (more symmetry) from upstream to downstream of the delta. The ratio of M2 and M4 amplitude shows that the value increases from downstream to upstream, with a maximum ratio of 0.1 in Tanjung Redeb.

oai:ojs.ejournal.undip.ac.id:article/6913 2014-05-20T03:02:43Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6913 2014-05-20T03:02:43Z Buletin Oseanografi Marina Vol 1, No 5 (2012): Buletin Oseanografi Marina; 26-33 Suryono, Chrisna Adhi; Jurusan Ilmu Kelautan Fakultas Perikanan & Ilmu Kelautan Universitas Diponegoro 2012-10-10 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6913 en Segara anakan merupakan salah satu estuaria terbesar di Pulau Jawa yang terkenal dengan keanekaragaman hayatinya.  Diantara biota yang terdapat adalah kerang totok (Geloina sp) yang berasosiasi dengan hutan mangrove. Karena memiliki nilai ekonomis maka selalu di tangkap. Maka dari itu sangat tepat jika kerang tersebut dipelajari ekologis maupun biologisnya. Tujuan dari penelitian ini adalah untuk mengetahui distribusi dan stuktur populasi kerang Geloina sp tersebut. Penelitian dilakukan pada bulan Juli – Oktober 2005 di Segaraakan Cilacap pada empat stasiun yang berbeda salinitasnya (13, 15, 30 dan 32 ppt).  Sifat penelitian adalah studi kasus, metoda pengambilan sampel yang digunakan adalah metoda sampling area. Data yang diambil meliputi kerang dan kondisi perairan. Data yang didapatkan dikelompokan berdasarkan kelas ukuran panjang cangkang selanjutnya dilakukan uji chi kwadrat untuk menentukan pola sebaran. Hasil penelitian menunjukan kerang yang didapat adalah G. erosa dengan pola sebaran merata pada keempat stasiun penelitian yang berbeda salinitasnya.  Adapun kepas ukuran kerang yang didapat dalam keempat stasiun dapat dikelompokan menjadi kelas ukuran <3, 3 – 3,9, 4 – 4,9, 5 – 5,9, 6 – 6,9, 7 – 7,9, .>8 cm.  Populasi kerang terbanyak pada semua stasiun adalah kelas ukuran 6 – 6,9 cm Kata Kunci : Segaraanakan, Geloina sp, salinitas

oai:ojs.ejournal.undip.ac.id:article/72787 2025-10-18T08:20:06Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/72787 2025-10-18T08:20:06Z Buletin Oseanografi Marina Vol 14, No 3 (2025): Buletin Oseanografi Marina; 467-480 Assidqy, Muammar Ridho; Departemen Sumberdaya Akuatik, Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro Febrianto, Sigit; Departemen Sumberdaya Akuatik, Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro Ain, Churun; Program Studi Manajemen Sumberdaya Perairan, Departemen Sumberdaya Akuatik, Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro 2025-10-18 15:20:05 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/72787 Distribusi Spasial; Ekosistem Mangrove; Kepulauan Karimunjawa; Sampah Laut id Ekosistem mangrove memiliki peran strategis dalam menjaga stabilitas wilayah pesisir, baik dari aspek ekologis, ekonomis, maupun sosial. Meningkatnya aktivitas antropogenik seperti permukiman, pariwisata, dan perikanan menyebabkan akumulasi sampah laut yang mengancam keberlanjutan ekosistem mangrove. Kepulauan Karimunjawa sebagai kawasan konservasi mengalami tekanan akibat polusi sampah laut yang terperangkap di sistem perakaran mangrove. Penelitian ini bertujuan untuk mengidentifikasi jenis dan komposisi sampah laut, menghitung kepadatan, serta memetakan distribusi spasialnya pada ekosistem mangrove. Penelitian dilakukan pada dua lokasi dengan karakteristik yang berbeda, menggunakan metode line transect berdasarkan zonasi pertumbuhan mangrove (seaward, middle, dan landward). Pengolahan data mencakup uji independent samples t-test, regresi polinomial, serta analisis spasial menggunakan citra satelit Sentinel-2A. Hasil Penelitian menunjukkan sampah plastik merupakan jenis dominan (65,86%), diikuti oleh styrofoam (20%) dan karet (9,81%). Lokasi mangrove dekat permukiman memiliki kepadatan sampah yang signifikan lebih tinggi dibandingkan kawasan wisata (p < 0,05). Sampah laut terkonsentrasi pada zona seaward (92,88%) dan menunjukkan hubungan kuat dengan jarak pengambilan sampel dari pantai (R² = 0,83). Vegetasi mangrove yang ditemukan di lokasi penelitian terdiri atas Rhizophora sp., Sonneratia sp., Ceriops sp., dan Lumnitzera sp. yang memiliki karakteristik perakaran berbeda dan berperan dalam proses penjebakan sampah. Penelitian ini memberikan kontribusi dalam penyusunan strategi mitigasi berbasis spasial untuk perlindungan ekosistem mangrove dari tekanan limbah padat.

oai:ojs.ejournal.undip.ac.id:article/22544 2020-05-16T03:12:10Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/22544 2020-05-16T03:12:10Z Buletin Oseanografi Marina Vol 8, No 1 (2019): Buletin Oseanografi Marina; 17-24 Fajeriadi, Hery; Program Studi Magister Pendidikan Biologi, Program Pascasarjana, Fakultas Keguruan dan Ilmu Pendidikan, Universitas Lambung Mangkurat Zaini, Muhammad; Program Studi Magister Pendidikan Biologi, Program Pascasarjana, Fakultas Keguruan dan Ilmu Pendidikan, Universitas Lambung Mangkurat Dharmono, Dharmono; Program Studi Magister Pendidikan Biologi, Program Pascasarjana, Fakultas Keguruan dan Ilmu Pendidikan, Universitas Lambung Mangkurat 2019-04-19 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/22544 Diversity; Mesogastropod; Neogastropod; Coastal; Kotabaru id Gastropoda tersebar luas di kawasan pesisir, salah satunya pesisir Pulau Sembilan Kotabaru. Kawasan ini masih tergolong alami dan terdapat terumbu karang. Beberapa titik terumbu karang mulai mengalami kerusakan. Terumbu dan batu karang di zona eulitoral merupakan habitat alami gastropoda. Gastropoda terbagi menjadi tiga ordo, dua diantaranya adalah Ordo Mesogastropoda dan Ordo Neogastropoda belum didokumentasikan. Penelitian ini bertujuan untuk melanjutkan dokumentasi spesies gastropoda (Mesogastropoda dan Neogastropoda) dan menganalisis indeks keanekaragamannya. Data dikumpulkan dengan teknik purposive sampling dengan luas plot 1 m2, sebanyak 20 plot, di sepanjang seratus meter mengikuti garis pantai. Data yang dikumpulkan adalah nama spesies dan jumlah individu setiap spesies.­ Berdasarkan data tersebut ditentukan indeks keanekaragaman menggunakan persamaan Shannon-Wienner. Ditemukan lima spesies dari Ordo Mesogastropoda dan dua spesies dari Ordo Neogastropoda.Indeks keanekaragaman (H’) Mesogastropoda dan Neogastropoda adalah 1.620 dengan kategori sedang, artinya ekosistem di kawasan tersebut tergolong stabil. Gastropods are widespread in the coastal area, one of which is the coast of Pulau Sembilan Kotabaru. This area is still relatively natural, and there are coral reefs. Some points of coral reefs began to suffer damage. Reefs and rocks in the eulittoral zone are natural gastropod habitats. Gastropods are divided into three orders, two of which are mesogastropod orders, and the neogastropod order has not been documented. This study aims to continue the documentation of gastropod species (Mesogastropods and Neogastropods) and analyze their diversity index. Data were collected by purposive sampling technique with a plot area of 1 m2, as many as 20 plots, along a hundred meters following the coastline. The data collected is the name of the species and the number of individuals in each species. Based on these data the diversity index is determined using the Shannon-Wiener equation. Five species of the mesogastropod order and two species of the neogastropod order were found. The Mesogastropod and Neogastropod diversity index (H') is 1,620 in the medium category, meaning that the ecosystem in the region is classified as stable.

oai:ojs.ejournal.undip.ac.id:article/49513 2023-06-20T04:50:15Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/49513 2023-06-20T04:50:15Z Buletin Oseanografi Marina Vol 12, No 2 (2023): Buletin Oseanografi Marina; 253-260 Aprianto, Ilham Andika; Program Studi Ilmu Kelautan, Jurusan Kelautan dan Perikanan, Universitas Trunojoyo Madura Dwi Kartika, Ary Giri; Program Studi Ilmu Kelautan, Jurusan Kelautan dan Perikanan, Universitas Trunojoyo Madura Sains dan Teknologi Penggaraman, Univeristas Trunojoyo Madura Pratiwi, Wiwit Sri Werdi; Program Studi Ilmu Kelautan, Jurusan Kelautan dan Perikanan, Universitas Trunojoyo Madura Sains dan Teknologi Penggaraman, Univeristas Trunojoyo Madura Effendy, Makhfud; Program Studi Ilmu Kelautan, Jurusan Kelautan dan Perikanan, Universitas Trunojoyo Madura Sains dan Teknologi Penggaraman, Univeristas Trunojoyo Madura 2023-06-20 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/49513 Nitrat; Fosfat; Silika; Kualitas air; Klorofil-a id Pantai Pedelegan merupakan salah satu pantai kawasan wisata yang terletak di Kabupaten Pamekasan. Perairan Padelegan dekat dengan ekosistem mangrove, estuari dan berdekatan dengan tambak garam. Ekosistem tersebut merupakan penunjang kesuburan perairan yang dapat diketahui dari kadar nutrient dan distribusi klorofil-a yang ada. Penelitian ini bertujuan untuk mengetahui distribusi nutrien dan biomassa fitoplankton serta hubungannya dengan parameter kualitas perairan. Pengambilan sampel dilakukan pada sembilan titik. Metode yang digunakan menganalisis kandungan nitrat yaitu bursin asam sulfanilat, fosfat dengan spektrofotometer secara asam askorbat, silika menggunakan metode nessler dan biomassa fitoplankton menggunakan metode APHA. Hasil penelitian menunjukkan bahwa kadar nutrien di perairan Padelegan memiliki distribusi yang berbeda-beda. Kadar nitrat, fosfat dan klorofil-a tertinggi terletak pada titik empat yang merupakan daerah peralihan menuju laut lepas pada arah barat daya. Sedangkan kadar silika tertinggi ditunjukkan pada titik dua yang merupakan daerah pesisir pada arah barat laut. Berdasarkan hasil korelasi rank spearman, silika menunjukkan korelasi yang paling kuat terhadap klorofil-a dibandingkan dengan nutrien lainnya dengan nilai rho(ρ) sebesar 0,5435. Selanjutnya ditambahkan, suhu adalah parameter kualitas air yang memiliki keeratan paling kuat dengan klorofil-a (rho(ρ) = 0,3766). Peningkatan kadar klorofil-a di perairan padelegan berkaitan erat dengan peningkatan kadar nutrien. Pedelegan Beach is one of the beaches in the tourist area located in Pamekasan Regency. Padelegan waters are close to mangrove ecosystems and estuaries and adjacent to salt ponds. This study aims to determine the distribution of nutrients and phytoplankton biomass and their relationship to water quality parameters. Sampling was carried out at nine points using the SNI 6989.59:2008 method. The method used to analyze the nitrate content is brucine sulfanilic acid, phosphate with an ascorbic acid spectrophotometer, silica using the Nessler method, and phytoplankton biomass using the APHA method. The results showed that nutrient levels in Padelegan waters had different distributions. The highest levels of nitrate, phosphate, and chlorophyll-a are located at point four which is a transitional area to the high seas in the southwest direction. While the highest silica content is shown at the second point , a coastal area in the northwest direction. Based on the Spearman rank correlation results silica showed the strongest correlation to chlorophyll-a compared to other nutrients with a rho(ρ) value of 0.5435. Furthermore, the temperature is a water quality parameter that has the strongest affinity with chlorophyll-a (rho(ρ) = 0.3766). The increase in chlorophyll-a levels in Padelegan waters is closely related to the increase in nutrient levels.

oai:ojs.ejournal.undip.ac.id:article/6949 2014-05-22T08:08:31Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6949 2014-05-22T08:08:31Z Buletin Oseanografi Marina Vol 2, No 3 (2013): Buletin Oseanografi Marina; 38-47 Rochaddi, Baskoro; Jurusan Ilmu Kelautan Fak. Ilmu Kelautan dan Perikanan Universitas Diponegoro 2013-07-22 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6949 en Perencanaan untuk pengelolaan kawasan pesisir memerlukan batasan dan deskripsi mengenai kawasan daratan pesisir yang jelas. Permasalahan yang ada di Indonesia pada umumnya dan Kota Semarang pada khususnya adalah  belum ditetapkannya batas wilayah pesisir baik untuk perencanaan maupun operasionalnya, sehingga sampai sekarang wilayah daratan pesisir masih diperlakukan sama seperti wilayah daratan lainnya. Maka dari itu penelitian untuk mencari batas daratan pesisir,  sangat penting dilakukan di Kota Semarang. Penelitian ini bertujuan untuk menentukan batas wilayah daratan pesisir di Kota Semarang dengan pendekatan biofisik. Penelitian lapangan dilakukan pada tanggal 21 Agustus – 30 September 2004. Penelitian dilakukan di wilayah Kota Semarang, meliputi tiga sungai yaitu Sungai Plumbon, Sungai Banjir Kanal Barat, dan Sungai Banjir Kanal Timur. Adapun data intrusi air asin pada akuifer air tanah dangkal berdasarkan penelitian yang dilakukan pada tahun 2000. Materi penelitian meliputi parameter biologi (makrozoobenthos, fitoplankton, dan mangrove) dan parameter fisik (jangkauan masuknya air laut di sungai, intrusi air laut pada akuifer dangkal, kajian teoritis geologi). Dari hasil analisis kedua parameter tadi, maka selanjutnya dapat ditarik batas wilayah daratan pesisir di daerah Kota Semarang. Hasil dari tumpang tindih peta berdasarkan parameter jangkauan masuknya air laut di sungai, intrusi air laut pada air tanah dangkal, makrozoobenthos, fitoplankton dan mangrove menunjukkan bahwa batas daratan pesisir Kota Semarang secara biofisik untuk Semarang bagian barat adalah 1,7 - 2,2 Km dari garis pantai, Semarang bagian tengah 1,9 – 3,5 Km dari garis pantai dan untuk Semarang bagian timur 2,4 – 4,8 Km dari garis pantai. Kata Kunci: batas biofisik, daratan pesisir, Semarang

oai:ojs.ejournal.undip.ac.id:article/29111 2020-09-27T10:49:01Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/29111 2020-09-27T10:49:01Z Buletin Oseanografi Marina Vol 9, No 1 (2020): Buletin Oseanografi Marina; 77-82 Subardjo, Petrus; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Suryoputro, Agus Anugroho Dwi; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Praktikto, Ibnu; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2020-04-30 08:00:15 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/29111 Landsat-8; Sedimen Tersuspensi; Teluk Awur id Sedimen tersuspensi dianggap sebagai sedimen yang didistribusikan oleh arus laut. Arus sepanjang pantai (longshore current) berperan besar terhadap proses perpindahan sedimen di perairan. Gelombang laut yang yang membentuk sudut terhadap garis pantai menyebabkan arus sepanjang pantai Transpor sedimen yang disebabkan oleh arus sepanjang panti sering menimbulkan permasalahan erosi pantai dan pendangkalan perairan. Perairan Teluk Awur memiliki bentuk teluk dan tanjung yang memungkinkan terjadinya arus sepanjang pantai. Potensi adanya proses erosi dan sedimentasi di perairan Teluk Awur membuat pentingnya kajian mengenai pola sebaran sedimen tersuspensi. Penelitian ini mampu menjelaskan tentang pola sebaran sedimen tersuspensi di perairan Teluk Awur, Kecamatan Tahunan, Kabupaten Jepara. Metode yang digunakan untuk penentuan sedimen tersuspensi menggunakan pengindraan jauh dan data yang digunakan yaitu citra satelit landsat-8. Kandungan sedimen tersuspensi tertinggi berada di Desa Teluk Awur dan Desa Demaan. Kandungan tertinggi sebesar ± 67,54 mg/L dan semakin menjauhi pantai konsentrasi menurun. Tingginya kadungan sedimen tersuspensi dipengaruhi oleh proses mixing dan intensitas curah hujan. Suspended sediments are considered as sediments distributed by ocean currents. Current along the coast (longshore current) plays a major role in the process of transfer of sediment in the waters. Sea waves that form angles to the coastline cause currents along the coast Sediment transport caused by currents along the orphanage often cause erosion and coastal silting problems. The waters of Teluk Awur have the shape of bays and headlands which allow currents along the coast. The potential for erosion and sedimentation in the Awur Bay waters makes it important to study the pattern of suspended sediment distribution. This research is able to explain the pattern of suspended sediment distribution in Awur Bay waters, Annual District, Jepara Regency. The method used to determine suspended sediment uses remote sensing and the data used are Landsat-8 satellite imagery. The highest suspended sediment content was in Teluk Awur Village and Demaan Village. The highest content of ± 67.54 mg / L and increasingly away from the beach decreased concentration. The high suspended sediment content is influenced by the mixing process and the intensity of rainfall. 

oai:ojs.ejournal.undip.ac.id:article/54666 2024-07-04T18:54:21Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/54666 2024-07-04T18:54:21Z Buletin Oseanografi Marina Vol 13, No 2 (2024): Buletin Oseanografi Marina; 189-203 Nurjanah, Ulfah; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Widianingsih, Widianingsih; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Helmi, Muhammad; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Nuraini, Ria Azizah Tri; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2024-06-05 22:58:06 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/54666 Geospasial; Ikan Kerapu Macan; Kesesuaian Perairan; Menjangan Besar; Menjangan Kecil id Industri perikanan budidaya dengan sistem keramba jaring apung di era modern ini telah berkembang menjadi salah satu industri pangan yang memiliki pertumbuhan tercepat di dunia. Keterbatasan informasi mengenai lokasi yang berpotensi untuk kegiatan budidaya menjadi faktor yang mempengaruhi perkembangan industri ini. Perairan Pulau Menjangan Besar dan Menjangan Kecil memiliki potensi untuk pengembangan kegiatan budidaya perikanan. Ikan kerapu macan (E. fuscoguttatus) menjadi salah satu komoditas yang dapat dibudidayakan dengan teknologi keramba jaring apung. Penentuan lokasi yang sesuai untuk kegiatan budidaya ikan kerapu macan dengan keramba jaring apung sangat diperlukan untuk mendukung efektivitas budidaya. Beberapa parameter yang perlu dipertimbangkan dalam penentuan lokasi yaitu parameter suhu permukaan laut, salinitas, pH, oksigen terlarut, kedalaman perairan, kecerahan perairan, arus dan gelombang. Parameter kualitas perairan tersebut berperan penting dalam kehidupan organisme perairan. Penelitian ini dilakukan melalui survei pada 35 titik stasiun dengan metode purposive sampling. Pemodelan arus dan gelombang juga dilakukan untuk mengetahui kecepatan arus dan ketinggian gelombang pada lokasi penelitian. Pemodelan arus dan gelombang dilakukan untuk mewakili setiap musim. Analisis data dilakukan melalui modifikasi pada matriks kriteria kesesuaian. Hasil setiap parameter yang diperoleh kemudian diintegrasikan melalui Sistem Informasi Geografis dengan menggunakan ArcGIS 10.8. Berdasarkan hasil integrasi diperoleh luas area perairan yang tergolong sangat sesuai seluas untuk kegiatan budidaya ikan kerapu macan seluas 56.15 ha.  The aquaculture industry using floating net cage systems in the modern era has developed into one of the fastest-growing food industries in the world. Limited information regarding potential locations for cultivation activities is a factor influencing the development of this industry. The waters of Menjangan Besar and Menjangan Kecil Islands have the potential for developing fisheries cultivation activities. Tiger grouper (E. fuscoguttatus) is one of the commodities that can be cultivated using floating net cage technology. Determining a suitable location for tiger grouper cultivation activities using floating net cages is crucial to support the effectiveness of cultivation. Several parameters that need to be considered in determining the location are sea surface temperature, salinity, pH, dissolved oxygen, water depth, water brightness, currents, and waves. These water quality parameters play an important role in the life of aquatic organisms. This research was conducted through a survey at 35 stations using a purposive sampling method. Current and wave modeling was also carried out to determine the current speed and wave height at the research location. Current and wave modeling is carried out to represent each season. Data analysis was carried out through modifications to the conformity criteria matrix. The results of each parameter obtained were then integrated through the Geographic Information System using ArcGIS 10.8. Based on the integration results, it was obtained that the water area classified as very suitable for tiger grouper cultivation activities was 56.15 ha.

oai:ojs.ejournal.undip.ac.id:article/11170 2016-05-31T03:00:57Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/11170 2016-05-31T03:00:57Z Buletin Oseanografi Marina Vol 2, No 4 (2013): Buletin Oseanografi Marina; 32-38 Subagiyo, Subagiyo; Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro Setyati, Wilis Ari; Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/11170 en Kultur protektif merupakan salah satu bentuk biopreservasi yang dikembangkan untuk menghambat pertumbuhan bakteri yang merusak produk pangan. Pada penelitian ini diisolasi jenis-jenis bacteri asam laktat dari Ikan Beronang dan Ikan Kakap yang telah disimpan dalam suhu rendah, serta melakukan skrining berdasarkan kemampuan menghambat pertumbuhan bakteri patogen yang umum mengkontaminasi bahan makanan yang disimpan pada suhu rendah. Isolasi bakteri asam laktat dilakukan dengan metode taburan dalam medium MRS (de Man, Rogosa and Sharpe) Ada dua kelompok bakteri asam laktat yang diisolasi yaitu yang bersifat halofilik dan non-halofilik. Inkubasi kultur bakteri dilakukan pada suhu<20 oC. Isolat-isolat Bakteri asam laktat (BAL) yang diperoleh selanjutnya diskrining untuk mendapatkan strain yang aktif terhadap bakteri dan bakteri pembusuk dengan meto dedifusi agar menggunakan paper disc. Bakteri uji yang digunakan untuk skrining adalah bakteri Escherichia coli, Staphylococcusaureus, Pseudomonas fluorescens dan Pediococcus lb 42. Indikator adanya aktivitas antibakteri ditunjukkan oleh terbentuknya zona penghambatan.  Hasil isolasi diperoleh total 68 isolat BAL dengan rincian 25 isolat aktif terhadap 4 jenis bakteri uji, 13 isolat aktif terhadap 3 jenis bakteri uji , 7 isolat aktif terhadap 2 isolat uji, 11 isolat aktif terhadap 1 jenis bakteri uji dan hanya 2 isolat yang tidak memiliki aktivitas antibakteri terhadap bakteri uji. Hal ini menunjukkan bahwa BAL yang berasal dari produk perikanan lautmemilikipotensiuntuk dikembangkan sebagai kultur protektif pada industri perikanan.   Kata kunci :BakteriAsamLaktat, KulturProtektif,  Biopreservasi, AktivitasAntibakteri  

oai:ojs.ejournal.undip.ac.id:article/35251 2021-09-26T09:37:22Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/35251 2021-09-26T09:37:22Z Buletin Oseanografi Marina Vol 10, No 3 (2021): Buletin Oseanografi Marina; 223-232 Yasa, Ngurah Sedana; Balai Produksi Induk Udang Unggul dan Kekerangan, Kementerian Kelautan dan Perikanan Anshory, Lutfi; Balai Produksi Induk Udang Unggul dan Kekerangan, Kementerian Kelautan dan Perikanan Handayani, Niken S.N.; Fakultas Biologi, Laboratorium Genetik, Universitas Gadjah Mada Isnansetyo, Alim; Departemen Perikanan Fakultas Pertanian, Universitas Gadjah Mada Murwantoko, Murwantoko; Departemen Perikanan Fakultas Pertanian, Universitas Gadjah Mada 2021-09-20 02:01:59 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/35251 Abalone; Haliotis squamata; heat shock protein; stress id Abalon merupakan salah satu moluska bercangkang tunggal yang memiliki nilai ekonomis tinggi dan merupakan komoditas potensial dalam peningkatan devisa Negara. Namun permasalahannya adalah mudahnya abalone mengalami stress akibat perubahan berbagai faktor lingkungan seperti suhu, salinitas, bakteri Vibrio dan bahan desinfektan seperti chlorine. Penelitian ini dilakukan untuk mengetahui tingkat stress benih abalone terhadap paparan chlorine pada gen heat shock protein (HSP) dan mengetahui perubahan enzim-enzim  antioksidan seperti SOD,CAT,PO dan perubahan struktur histologi otot kaki abalone akibat paparan chlorine. Koleksi benih abalone dengan ukuran cangkang 3-4 cm dari unit hatchery abalone, BPIU2K Karangasem Bali. Uji paparan abalone pada akuarium kaca volume 100 L dengan konsentrasi chlorine 10 ppm. Pengambilan sample (hemolim, otot kaki, gonad) dilakukan pada waktu pengamatan (0,12,24,48 jam). Pengamatan meliputi uji  ekspresi gen heat shock protein (Hsp70 dan Hsp90), aktifitas enzim-enzim antioksidan dan histology pada otot kaki. Hasil penelitian menunjukkan bahwa Hsp70 terekspresi paling tinggi pada hemolim abalone yaitu sebesar 350 kali lipat pada paparan jam ke 12 dibandingkan kontrol (P<0.05). Sedangkan, Hsp90 pada waktu yang sama menunjukkan tingkat stress abalone paling tinggi pada otot kaki dengan tingkat ekspresi sebesar 7 kali lipat jika dibandingkan kontrol (P<0.05).  Gen heat shock protein diekspresikan cukup tinggi pada uji paparan chlorine, namun demikian  Hsp70 menunjukkan tingkat ekspresi yang lebih tinggi jika dibanding dengan Hsp90. Hsp70 lebih sensitif sebagai marka stress abalone akibat paparan chlorine. Perubahan struktur histologi menunjukkan cemaran chlorine dapat meningkatkan ukuran diameter hemolim sinus dan kerusakan pada lapisan epithel otot kaki abalone. Abalone is one of the single-shelled mollusks which has high economic value and is a commodity in increasing the country's foreign exchange. However, the problem is that it is easy for abalone to experience stress due to the influence of various environmental factors such as temperature, salinity, Vibrio bacteria and disinfectants such as chlorine. The study was conducted to determine the stress level of abalone seeds produced by hatcheries against residual chlorine. The aim of the study were to see the stress level based on the heat shock protein (HSP) gene and to see changes in antioxidant enzymes such as SOD, CAT, PO and histological structure of abalone foot muscles due to chlorine contamination. Collection of abalone seeds with a 3-4 cm shell size from the abalone hatchery unit, BPIU2K Karangasem Bali. Abalone exposure test using a glass volume of 100 L with a chlorine concentration of 10 ppm. Furthermore, sampling was carried out (hemolime, leg muscles, gonads) at the time of observation (0.12,24,48 hours). Observations included heat shock protein gene expression (Hsp70 and Hsp90) and histology in foot muscles. The results showed that Hsp70 was the highest expressed in hemolime abalone 350 times at 12 hours exposure compared to controls (P <0.05). Meanwhile, Hsp90 at the same time showed the highest level of stress on leg muscles with an expression level of  7 times when compared to controls (P <0.05). It was concluded that the heat shock protein gene was expressed high enough in the chlorine exposure test, however, Hsp70 was more sensitive as a sign of abalone stress as indicated by a higher expression level when compared to Hsp90. Changes in the histological structure show that chlorine contamination can increase the diameter of the sinus hemolime and damage to the epithelial layer of the abalone foot muscles.

oai:ojs.ejournal.undip.ac.id:article/60085 2026-02-11T04:53:31Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/60085 2026-02-11T04:53:31Z Buletin Oseanografi Marina Vol 14, No 1 (2025): Buletin Oseanografi Marina; 145-156 Rachman, Reno Arief; Pusat Riset Teknologi Hidrodinamika, Badan Riset dan Inovasi Nasional Firmansyah, Raka; Pusat Riset Teknologi Hidrodinamika, Badan Riset dan Inovasi Nasional Aziiz, Shafan Abdul; Pusat Riset Teknologi Hidrodinamika, Badan Riset dan Inovasi Nasional Catur Istiyanto, Dinar; Pusat Riset Teknologi Hidrodinamika, Badan Riset dan Inovasi Nasional Suharyanto, Hamzah Haru Radityo; Pusat Riset Teknologi Hidrodinamika, Badan Riset dan Inovasi Nasional Rahili, Nurkhalis; Pusat Riset Teknologi Hidrodinamika, Badan Riset dan Inovasi Nasional Widagdo, Aloysius Bagyo; Pusat Riset Teknologi Hidrodinamika, Badan Riset dan Inovasi Nasional Wibowo, Mardi; Pusat Riset Teknologi Hidrodinamika, Badan Riset dan Inovasi Nasional Khoirunnisa, Hanah; Pusat Riset Teknologi Hidrodinamika, Badan Riset dan Inovasi Nasional 2025-02-20 05:07:29 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/60085 sedimen dasar; proses pantai; lingkungan pantai; tekstur sedimen id Pengembangan Pelabuhan Patimban di Subang diharapkan sebagai penyokong pelabuhan Tanjung Priok di Jakarta yang sudah tidak mampu memenuhi kebutuhan bongkar muat dari para pelaku usaha khususnya di Jawa Barat. Dalam melakukan perencanaan dan pengembangan pelabuhan, salah satu hal utama yang perlu dipertimbangkan adalah masalah sedimentasi. Proses sedimentasi di perairan sangat terkait dengan karakteristik sedimen. Tujuan penelitian ini adalah untuk mengetahui pola sebaran karakteristik sedimen dasar seperti kadar air, berat jenis, gradasi, tekstur sedimen, ukuran d50 butir sedimen dan analisis statistik sedimen dasar sehingga dapat mendukung rencana pengembangan pelabuhan. Metode yang dipakai adalah pengambilan sampel sedimen di lapangan, pengujian sampel sedimen di laboratorium, analisis sedimen secara statistik dan analisis deskriptif karakteristik sedimen dasar menggunakan metode Gradistat. Berdasarkan hasil kajian diketahui nilai kadar air 59,06-210,046 %, berat jenis 1,951–2,494 g/cm3, nilai d50 0,07–0,16 mm, ukuran rerata butir 64,0-86,5 µm, sortasi sedimen moderately sorted (terpilah cukup), analisis statistik sedimen tipe platykurtic, jenis lithologi didominasi oleh lanau dan pasir. Diharapkan hasil penelitian ini dapat membantu pengelolaan sedimentasi, merancang pondasi bangunan pantai dan struktur lainnya secara tepat dan efisien. 

oai:ojs.ejournal.undip.ac.id:article/15734 2020-04-17T12:03:11Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/15734 2020-04-17T12:03:11Z Buletin Oseanografi Marina Vol 5, No 2 (2016): Buletin Oseanografi Marina; 135-142 Yudiati, Ervia; Program Studi Ilmu Kelautan,Fakultas Perikanan dan Ilmu Kelautan,Universitas Diponegoro Kampus Tembalang,Semarang 50275 Telp/Fax. 024-7474698 2016-10-09 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/15734 en Tingkat eskpresi gen Lectin/Toll dan laju sintasan ditentukan setelah udang vaname diberi pakan yang mengandung alginat dengan dosis berbeda dan diuji tantang dengan WSSV. Ekspresi gen dilakukan dengan qRT-PCR dan dihitung dengan metode komparatif menggunakan β–actin sebagai kontrol internal. Laju sintasan dihitung pada jam ke 96 setelah uji tantang. Ekspresi gen Lectin pada Udang mengalami up-regulated setelah uji tantang, sedangkan ekspresi gen Toll mengalami down-regulated. Laju sintasan pada udang yang diberi suplementasi alginat 2,0 g.kg-1 dan 4,0 g.kg -1 lebih tinggi (P<0,05) apabila dibandingkan dengan tanpa suplementasi.   Kata kunci: ekspresi gen, laju sintasan, Litopenaeus vannamei, alginat

oai:ojs.ejournal.undip.ac.id:article/45619 2022-09-07T17:08:50Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/45619 2022-09-07T17:08:50Z Buletin Oseanografi Marina Vol 11, No 2 (2022): Buletin Oseanografi Marina; 193-205 Batubara, Mahardiani Putri Naulia; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Pusat Meteorologi Maritim, Badan Meteorologi Klimatologi dan Geofisika Zainuri, Muhammad; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Kunarso, Kunarso; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Puryajati, Ardiansyah Desmont; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2022-05-20 08:05:02 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/45619 MJO; La Nina kuat; suhu permukaan laut; angin 850 mb; curah hujan id Variabilitas cuaca dan iklim di Indonesia disebabkan oleh berbagai macam faktor skala ruang dan waktu, baik yang bersifat lokal, regional, maupun global dengan variasi waktu harian, bulanan, musiman, hingga tahunan. Pada skala waktu harian hingga intramusiman, MJO menjadi faktor utama variabilitas di wilayah tropis, sedangkan pada skala global yang bersifat tahunan, El Nino dan La Nina memberikan kontribusi terbesar. Penelitian ini bertujuan untuk mengkaji karakteristik MJO yang aktif bersamaan dengan La Nina kuat pada tahun 2011/2012. Metode pengolahan data menggunakan bahasa pemrograman untuk mengolah data RMM1 dan 2, suhu permukaan laut, outgoing longwave radiation, angin zonal 850 hPa dan 200 hPa, fluks panas laten, kelembapan udara relatif (Rh), dan curah hujan. Hasil menunjukkan saat MJO aktif bersamaan dengan La Nina kuat, SPL di wilayah tropis berada dalam kondisi hangat berkisar antara 29–30.50C yang terpusat di perairan Indonesia bagian timur dan Samudera Pasifik. Beberapa kondisi angin zonal lapisan 850 hPa menunjukkan intrusi angin timuran dengan kecepatan yang signifikan sebagai dampak dari pengaruh La Nina terhadap propagasi MJO. Gangguan angin timuran tidak terlalu mempengaruhi pertukaran panas laut-atmosfer dalam bentuk fluks panas laten, sehingga tetap bernilai positif. Kondisi basah La Nina dan MJO menyebabkan peningkatan Rh pada lapisan 1000–500 hPa sebesar 80-90% dan pada lapisan 200 hPa sebesar 70-80%. Hal ini mendukung propagasi dan memperpanjang durasi MJO yang aktif di perairan tropis. Pengaruh La Nina yang cukup kuat saat MJO aktif mendukung pertumbuhan awan konvektif sehingga terjadi peningkatan curah hujan sebesar 10–200 mm perhari.   Weather and climate variability in Indonesia is caused by various factors of space and time scale, both local, regional, and global with daily, monthly, seasonal, and yearly variations in time. On a daily to the intra-seasonal time scale, the MJO is the main factor of variability in the tropics, while on an annual global scale, El Nino and La Nina make the largest contribution. This study aims to examine the characteristics of the MJO that was active at the same time as strong La Nina in 2011/2012. The data processing method uses a programming language to process data RMM1 and 2, sea surface temperature, outgoing longwave radiation, 850 hPa and 200 hPa zonal winds, latent heat flux, relative humidity (Rh), and rainfall. The results show that when the MJO is active along with strong La Nina, SST in the tropics is in warm conditions ranging from 29 - 30.50C which is concentrated in the waters of eastern Indonesia and the Pacific Ocean. Several zonal wind conditions of the 850 hPa layer showed easterly wind intrusion with significant speed as the impact of La Nina influence on MJO propagation. The east wind disturbance does not significantly affect the ocean-atmosphere heat exchange in the form of latent heat flux, so it remains positive. Wet conditions of La Nina and MJO caused an increase of Rh in the 1000–500 hPa layer by 80-90% and in the 200 hPa layer by 70-80%. This supports propagation and extends the duration of active MJOs in tropical waters.

oai:ojs.ejournal.undip.ac.id:article/6903 2014-05-20T01:56:41Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6903 2014-05-20T01:56:41Z Buletin Oseanografi Marina Vol 1, No 3 (2012): Buletin Oseanografi Marina; 1-7 Wulandari, Sri Yulina; Jurusan Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro Semarang 2012-04-22 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6903 en Sungai Banjir Kanal Timur melintasi kota Semarang bagian timur yang padat pemukiman dan industri. Perairan ini menjadi tempat pembuangan  limbah hasil aktivitas industri dan domestik.  Logam Chromium  (Cr) di samping memberikan banyak manfaat juga  polutan yang menimbulkan pencemaran lingkungan apabila terdapat dalam limbah. Penelitian ini dilaksanakan pada bulan Juli-Agustus 2010, dengan tujuan untuk mengetahui seberapa jauh kadar polutan logam berat Cr menimbulkan pencemaran dalam air, sedimen dan Kerang Darah (Anadara granossa). Sampel air, sedimen maupun biota diambil dari tiga stasiun  penelitian, yaitu sungai, muara dan perairan pantai. Parameter fisika kimia perairan seperti suhu, salinitas,pH, kecepatan arus diukur secara insitu. Selanjutnya ketiga jenis sampel dianalisis di laboratorium dengan menggunakan spektrofotometer serapan atom. Hasil penelitian menunjukkan bahwa kadar logam berat Cr dalam air maupun sedimen di perairan pantai lebih tinggi dibandingkan di muara dan sungai. Kadar logam berat Cr dalam air, sedimen maupun Kerang Darah  telah melampaui baku mutu yang ditetapkan berdasarkan Kep MENLH RI No 51 tahun 2004 untuk air laut  dan baku mutu dari NOAA  tahun 1999 untuk sedimen. Kata-kata kunci: Banjir Kanal Timur Semarang,  air, sedimen, kerang darah, logam berat Cr

oai:ojs.ejournal.undip.ac.id:article/74319 2025-10-18T16:37:13Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/74319 2025-10-18T16:37:13Z Buletin Oseanografi Marina Vol 14, No 3 (2025): Buletin Oseanografi Marina; 378-392 Nurjanah, Lailatul; Departemen Akuakultur, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Desrina, Desrina; Departemen Akuakultur, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Herawati, Vivi Endar; Departemen Akuakultur, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2025-10-18 15:20:01 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/74319 Tiram mutiara; Kesesuaian Perairan; Sistem Informasi Geografis; Karimunjawa id Tiram mutiara (Pinctada maxima) merupakan salah satu komoditas perikanan Indonesia yang memiliki nilai ekonomis tinggi. Sampai saat ini belum ada budidaya tiram mutiara yang dilakukandi perairan Jawa. Keterbatasan informasi mengenai lokasi yang sesuai untuk budidaya menjadi salah satu kendala bagi pembudidaya. Penelitian ini bertujuan untuk mengkaji lokasi perairan yang diduga memiliki potensi untuk budidaya tiram mutiara. Perairan Nyamplungan, Karimunjawa diduga memiliki potensi sebagai wilayah budidaya tiram mutiara dengan daya dukung berupa arus perairan yang lambat serta kualitas air yang masih baik, sehingga perlu adanya penelitian lebih lanjut. Pengumpulan data dilakukan dengan cara pengukuran langsung ke lapangan, kemudian data hasil pengukuran diintegrasikan menggunakan ArcGIS 10.8. ArcGIS 10.8 merupakan software yang sering digunakan untuk melakukan analisis spasial dan banyak diterapkan pada bidang akuakultur untuk melakukan analisis kesesuaian perairan. Berdasarkan integrasi kesesuaian perairan, luas perairan yang sesuai untuk budidaya tiram mutiara (P. maxima) metode long line yang tergolong kedalam kelas sangat sesuai (S1) seluas 107,95 (10,17%) ha; kelas sesuai (S2) seluas 668,58 (62,98%) ha; dan kelas tidak sesuai (S3) memiliki luas wilayah sebesar 285,10 (26,85%) ha. Berdasarkan hasil analisis daya dukung perairan, total luas perairan yang dapat digunakan untuk budidaya mutiara seluas 776,53 ha.

oai:ojs.ejournal.undip.ac.id:article/19995 2020-04-17T12:06:12Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/19995 2020-04-17T12:06:12Z Buletin Oseanografi Marina Vol 7, No 2 (2018): Buletin Oseanografi Marina; 91-97 Ginting, Nada Kristiani; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Sedjati, Sri; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Supriyantini, Endang; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Ridlo, Ali; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2018-10-08 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/19995 Tetraselmis chuii; klorofil; karotenoid; pigmen; antioksidan; chlorophyll; carotenoids; pigments; antioxidant id Tetraselmis chuii merupakan alga hijau yang mengandung senyawa bioaktif seperti pigmen klorofil dan karotenoid. Pigmen klorofil dapat menurunkan risiko terkena kanker dan berpotensi sebagai antioksidan. Salah satu faktor eksternal yang berpengaruh  terhadap kandungan pigmen adalah cahaya. Penelitian ini bertujuan untuk mengetahui pengaruh warna pencahayaan terhadap biomassa, kandungan  pigmen dan aktivitas antioksidan T. chuii. Rancangan penelitian yang digunakan adalah  rancangan acak blok dengan tiga kali pengulangan. Perlakuan pencahayaan yang diberikan adalah putih, merah, dan biru. Perhitungan kepadatan dan pengukuran parameter kualitas air dilakukan setiap hari. Pemanenan dilakukan pada saat fase stasioner hari ke – 4. Kadar pigmen (klorofil a, b dan karotenoid) dilakukan secara spektrofotometri dan uji aktivitas antioksidan dilakukan dengan DPPH (1,1-difenil-2-pikrilhidrazil). Hasil penelitian menunjukkan bahwa kepadatan sel tertinggi terdapat pada perlakuan pencahayaan putih sebesar 95.800 sel/ml. Kandungan pigmen klorofil a dan klorofil b total tertinggi terdapat pada  pencahayaan merah (48,28 dan 40,86 μg/ml), serta karotenoid total tertinggi terdapat pada pencahayaan biru (6,70 μg/ml). Perlakuan perbedaan pencahayaan memberikan pengaruh nyata (P<0,05) terhadap kandungan pigmen (klorofil a, dan b). Aktivitas antioksidan ekstrak T. chuii  semua perlakuan tergolong sangat lemah ( IC50 lebih dari 200 ppm). Effect of Lighting on Pigments Content Tetraselmis chuii  a Source of Natural Antioxidants Tetraselmis chuii is a green algae which is containing bioactive compounds such as chlorophyll and carotenoid pigments. Chlorophyll may reduce the risk of cancer and potentially as an antioxidant. This research aims to know the effect of light colour  on biomass, pigment and antioxidant activity content of T. chuii. The research design used was a complete randomized design with three repetitions. The light treatments provided are white, red, and blue. Calculation of density and measurement of water quality parameters on daily basis. Harvesting is done during the stasionary phase at fourth day. Pigment levels (chlorophyll a, b and carotenoids) were performed by spectrophotometer and an antioxidant activity test was performed by DPPH (1,1-diphenyl-2-picrilhidrazil). The results showed that different colour lighting treatments had an effect (P <0.05) on pigment content (chlorophyll a, b, and carotenoid).The highest total chlorophyll content of a and chlorophyll b were found in the highest red light (48.28 and 40.86 μg/ ml) and the highest total carotenoids were in blue light (6.70 μg /ml). The highest cell desity in white lighting treatment is 95,800 cell/ml. Potential antioxidant activity of T. chuii extract for all treatments were very low (IC50 more than 200 ppm). 

oai:ojs.ejournal.undip.ac.id:article/46705 2023-06-20T04:50:15Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/46705 2023-06-20T04:50:15Z Buletin Oseanografi Marina Vol 12, No 2 (2023): Buletin Oseanografi Marina; 153-163 Zulkarnain, Muhammad Iskandar; Program Studi Bioteknologi, Departemen Biologi, Fakultas Sains dan Matematika, Universitas Diponegoro Kusumaningrum, Hermin Pancasakti; Program Studi Bioteknologi, Departemen Biologi, Fakultas Sains dan Matematika, Universitas Diponegoro Nurhayati, Nurhayati; Program Studi Bioteknologi, Departemen Biologi, Fakultas Sains dan Matematika, Universitas Diponegoro Suprihadi, Agung; Program Studi Biologi, Departemen Biologi, Fakultas Sains dan Matematika, Universitas Diponegoro Zainuri, Muhammad; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2023-06-20 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/46705 Mikroalga; ITS; 18S rDNA; Identifikasi Molekuler; Chlorella sorokiniana id Chlorella sorokiniana merupakan salah satu mikroalga penghasil astaxantin. Produksi astaxantin C. sorokiniana dapat meningkat pada kondisi kultur yang optimal. Penelitian ini bertujuan untuk memastikan identitas C. sorokiniana secara molekuler menggunakan ITS, dan 18S rDNA, serta untuk mengetahui pertumbuhan dan produksi astaxantin C. sorokiniana berdasarkan perlakuan cahaya. Metode yang digunakan pada penelitian ini meliputi kultivasi mikroalga C. sorokiniana, isolasi DNA, uji kuantitatif DNA, identifikasi molekuler melalui proses amplifikasi DNA dengan PCR (Polymerase Chain Reaction) menggunakan marka molekuler ITS dan 18S rDNA, visualisasi hasil PCR dengan elektroforesis menggunakan GelDoc diikuti sekuensing DNA. Produksi astaxantin mikroalga C. sorokiniana dihitung selama 10 hari dibawah perlakuan cahaya matahari dan sinar UV. Identifikasi molekuler C. sorokiniana menggunakan ITS memperoleh dengan ukuran fragmen sebesar 500 pb, sedangkan fragmen 18S rDNA sebesar 600 pb. Pertumbuhan mikroalga C. sorokiniana kontrol pada hari ke-10 dengan kerapatan 15×106 sel/ml, sedangkan pada perlakuan cahaya matahari dan sinar UV pada hari ke-10 dengan kerapatan 38,45×106 sel/ml. Konsentrasi astaxantin yang dihasilkan mikroalga C. sorokiniana pada perlakuan kontrol mencapai tertinggi 0.3306 mg/mL dan pada perlakuan cahaya matahari dan sinar UV meningkat mencapai 0,3874 mg/mL.  Chlorella sorokiniana is one of the astaxanthin-producing microalgae. Astaxanthin production of C. sorokiniana can be increased under optimal culture conditions. This study aims to determine the molecular identity of C. sorokiniana using ITS and 18S rDNA, as well as to determine the growth and production of astaxanthin C. sorokiniana based light treatment. The methods used in this study included C. sorokiniana microalgae cultivation, DNA isolation, DNA quantitative testing, molecular identification through the process of DNA amplification with PCR (Polymerase Chain Reaction) using ITS and 18S rDNA molecular markers, visualization of PCR results by electrophoresis using GelDoc followed by sequencing DNA. The astaxanthin production of C. sorokiniana microalgae was calculated for 10 days under sunlight and UV light treatment. Molecular identification of C. sorokiniana using ITS obtained a fragment size of 500 bp, while the 18S rDNA fragment was 600 bp. The growth of C. sorokiniana microalgae was controlled on day 10 with a density of 15×106 cells/ml, whereas in the treatment of sunlight and UV light on day 10 with a density of 38,45×106 cells/ml. The concentration of astaxanthin produced by C. sorokiniana microalgae in the control treatment reached 0,3306 mg/mL and in the sunlight and UV light treatments it increased to 0,3874 mg/mL.

oai:ojs.ejournal.undip.ac.id:article/6940 2014-05-22T02:42:15Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6940 2014-05-22T02:42:15Z Buletin Oseanografi Marina Vol 2, No 2 (2013): Buletin Oseanografi Marina; 54-60 Yusuf, Muhammad; Jurusan Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan Undip 2013-04-18 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6940 en Keberadaan sumberdaya pulau-pulau kecil di kawasan Taman Nasional Karimunjawa sangat strategis sebagai salahsatu sumber ekonomi untuk meningkatkan kesejahteraan masyarakat setempat. Untuk mencapai pemanfaatan yang berkelanjutan, identifikasi kondisi terumbu dan potensi ikan sangat perlu diketahui agar dalam pemanfaatan ke depan dapat dilakukan perencanaan pengelolaan secara lebih baik. Penelitian ini bertujuan untuk mengetahui kondisi terumbu karang dan potensi sumberdaya ikan karang yang terdapat di kawasan Taman Nasional Karimunjawa. Penelitian ini dilaksanakan mulai Juli 2005 - Agustus 2006 di perairan kawasan Taman Nasional Karimunjawa, Kabupaten Jepara. Hasil penelitian menunjukkan bahwa sebaran jumlah spesies karang yang ditemukan berkisar 20-30 genus, tertinggi ditemukan di Pulau Tengah, Pulau Kecil, Pulau Krakal Kecil dan Pulau Kumbang; sedangkan terendah ditemukan di Pulau. Kemujan dan Pulau. Menyawakan. Nilai indeks keanekaragaman jenis (H’) berkisar 1,611-2,590. Kondisi terumbu karang di perairan Karimunjawa sebagian besar telah rusak dengan kategori sedang (tutupan karang 25-49,9 %) dan hanya sebagian kecil yang kondisi karangnya masih baik (tutupan karang 50-74,9 %). Potensi sumberdaya ikan karang (reef fish) yang berhasil diamati menunjukkan kepadatan ikan berkisar 0,5-3,2 ekor/m2 atau rata-rata 1,14 ekor/m2; kelimpahan ikan berkisar 3,52-243,38 ton; potensi antara 1,76-121,69 ton/th; dan potensi lestari (MSY) antara 0,70-48,67 ton/th. Kata kunci: Karimunjawa, terumbu karang, potensai ikan karang

oai:ojs.ejournal.undip.ac.id:article/53099 2024-05-31T07:50:39Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/53099 2024-05-31T07:50:39Z Buletin Oseanografi Marina Vol 13, No 1 (2024): Buletin Oseanografi Marina; 52-62 Erniati, Erniati; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Malikussaleh Andika, Yudho; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Malikussaleh Imanullah, Imanullah; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Malikussaleh Imamshadiqin, Imamshadiqin; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Malikussaleh Salmarika, Salmarika; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Malikussaleh Yulistia, Elva Dwi; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Malikussaleh Lazuardi, Rafly; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Malikussaleh Maulana, Sanja; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Malikussaleh 2024-02-06 14:07:57 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/53099 Aceh Utara; Anadara granosa; bivalvia; keanekaragaman id Kabupaten Aceh Utara memiliki potensi sumberdaya hayati laut yang melimpah salah satunya adalah bivalvia. Sebagai langkah awal dalam pengelolaan dan pemanfaatan potensi bivalvia di wilayah Kabupaten Aceh Utara maka perlu dilakukan penelitian terkait dengan keanekaragaman dan kepadatan bivalvia. Tujuan penelitian untuk melihat keanekaragaman dan pola sebaran bivalvia di Perairan Kabupaten Aceh Utara. Penelitian dilaksanakan pada bulan Juli - Agustus 2022 di perairan Kabupaten Aceh Utara. Metode yang digunakan adalah purposive sampling dengan plot 1 x 1 m dengan analisis PCA dan cluster. Hasil penelitian melaporkan ditemukan 7 jenis bivalvia di Kabupaten Aceh Utara yaitu Geloina erosa, Donax cuneatus, Crassostrea sp1., Crassostrea sp2., Maretrix sp., Donax faba, dan Anadara granosa. Keanekaragaman bivalvia di Kabupaten Aceh Utara tergolong rendah berkisar 0 – 0,67. Ada jenis yang mendominasi dengan kepadatan tertinggi yaitu jenis A. granosa yaitu sebesar 23 Ind/m2. Kepadatan tertinggi bivalvia ditemukan pada Kecamatan Syamtalira Bayu yaitu sebesar 19 Ind/m2. Karakteristik kualitas perairan masih dalam rentang baku mutu untuk kelangsungan kehidupan biota laut. A. granosa telah dimanfaatkan oleh masyarakat Aceh Utara untuk dijual atau dikonsumsi sendiri. Untuk mengatasi masalah eksploitasi secara berlebihan maka perlunya pengelolan sumberdaya kerang ini untuk pemanfaatan secara berkelanjutan.  North Aceh District has abundant marine biological resource potential, one of which is bivalves. As a first step in the management and utilization of the potential of bivalves in the North Aceh district, it is necessary to carry out research related to the diversity and density of bivalves. The aim of the study was to look at the diversity and distribution patterns of bivalves in the waters of North Aceh District. The research was carried out in July - August 2022 in the waters of North Aceh Regency. The method used was purposive sampling with a 1 x 1 m plot with PCA and cluster analysis. The results of the study reported that there were 7 types of bivalves in North Aceh District, namely Geloina erosa, Donax cuneatus, Crassostrea sp1., Crassostrea sp2., Maretrix sp., Donax faba, and Anadara granosa. Bivalve diversity in North Aceh District is low, ranging from 0 to 0.67. There is a type that dominates with the highest density, namely A. granosa, which is 23 Ind/m2. The highest density of bivalves was found in Syamtalira Bayu District, which was 19 Ind/m2. Characteristics of water quality are still within the range of quality standards for the survival of marine biota. A. granosa has been used by the people of North Aceh for sale or self-consumption. To overcome the problem of overexploitation, it is necessary to manage these shellfish resources for sustainable use.

oai:ojs.ejournal.undip.ac.id:article/50374 2023-11-04T02:49:24Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/50374 2023-11-04T02:49:24Z Buletin Oseanografi Marina Vol 12, No 3 (2023): Buletin Oseanografi Marina; 379-394 Nagi, Achmad; Magister Sains Kebumian, Fakultas Ilmu dan Teknologi Kebumian, Institut Teknologi Bandung Napitupulu, Gandhi; Magister Sains Kebumian, Fakultas Ilmu dan Teknologi Kebumian, Institut Teknologi Bandung Radjawane, Ivonne Milichristi; Magister Sains Kebumian, Fakultas Ilmu dan Teknologi Kebumian, Institut Teknologi Bandung Kelompok Riset Oseanografi, Fakultas Ilmu dan Teknologi Kebumian, Institut Teknologi Bandung Indonesia - Korea-Indonesia Marine Technology Cooperation Research Center, Institut Teknologi Bandung, Nurdjaman, Susanna; Kelompok Riset Oseanografi, Fakultas Ilmu dan Teknologi Kebumian, Institut Teknologi Bandung Supriadi, Dedi; Pemanfaatan Sumberdaya Perikanan, Fakultas Perikanan dan Ilmu Kelautan, Universitas 17 Agustus 1945 Cirebon Ilmu Perikanan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran Nurhayati, Dewi; Pemanfaatan Sumberdaya Perikanan, Fakultas Perikanan dan Ilmu Kelautan, Universitas 17 Agustus 1945 Cirebon 2023-10-01 07:22:07 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/50374 Klorofil-a; Monsun; Tongkol; SPL id Ikan Tongkol (Euthynnus affinis) adalah komoditas di perairan Teluk Banten yang memiliki nilai produksi tinggi. Potensi ini bisa dimanfaatkan secara maksimal melalui pengetahuan tentang Zona Potensial Penangkapan Ikan (ZPPI). Penelitian ini bertujuan untuk menganalisis hubungan antara parameter oseanografi (suhu permukaan laut (SPL) dan klorofil-a) dan hasil tangkapan Ikan Tongkol, serta membuat pemetaan ZPPI Ikan Tongkol pada tahun 2014-2019. Prediksi ZPPI dilakukan melalui pendekatan parameter oseanografi berdasarkan citra satelit dan data hasil tangkapan Ikan Tongkol. Rata-rata tertinggi produksi Ikan Tongkol tahun 2014-2019 di Teluk Banten diperoleh selama musim peralihan I dengan SPL 29,92C – 30,98C dan konsentrasi klorofil-a 0,99 – 1,13 mg/m³. Analisis pengaruh SPL dan klorofil-a pada tangkapan dilakukan dengan regresi berganda. Pengaruh SPL dan klorofil-a terhadap hasil tangkapan dinilai cukup kuat berdasarkan dari koefisien korelasi () 0,743 dan koefisien determinasi () sebesar 0,551. Nilai  dapat memberikan penjelasan bahwa SPL dan klorofil-a mempengaruhi hasil tangkapan sebesar 55,1%. Melalui Analisis Wavelet diperoleh persebaran klorofil-a dominan dipengaruhi faktor monsun sedangkan pengaruh IOD (Indian Ocean Dipole) dan ENSO (El Niño–Southern Oscillation) lemah, sehingga pemetaan ZPPI disusun berdasarkan empat musim. ZPPI yang memiliki potensi lokasi terbanyak diperoleh pada musim barat sejumlah 13 titik. Selanjutnya, berkurang pada musim peralihan I sebanyak 10 titik, musim peralihan II sebanyak 6 titik, dan musim timur sebanyak 4 titik.   Mackarel Tuna (Euthynnus affinis) is a commodity in Banten Bay waters that has high production value. This potential can be maximally utilized through knowledge of the Potential Fishing Zone (). This study aims to analyze the relationship between oceanographic parameters (sea surface temperature (SST) and chlorophyll-a) and the catch of Mackarel Tuna, and create PFZ mapping of Mackarel Tuna in 2014-2019. The prediction of PFZ is done through the approach of oceanographic parameters based on satellite imagery and catch data. The highest average production of Mackarel Tuna in 2014-2019 in Banten Bay was obtained during transitional season I with a SST of 29.92°C - 30.98°C and a chlorophyll-a concentration of 0.99 - 1.13 mg/m³. Analysis of the effect of SST and chlorophyll-a on catch was done with multiple regression. The influence of SST and chlorophyll-a on catch was considered quite strong based on the correlation coefficient () of 0.743 and the coefficient of determination () of 0.551. The  value can provide an explanation that SST and chlorophyll-a affect the catch by 55.1%. Through Wavelet Analysis, it is obtained that the distribution of chlorophyll-a is dominantly influenced by monsoon factors while the influence of IOD (Indian Ocean Dipole) and ENSO (El Niño-Southern Oscillation) is weak, so that  mapping is organized based on four seasons. The  that has the most potential locations is obtained in the west season with 13 points. Furthermore, it decreases in the first transition season with 10 points, the second transition season with 6 points, and the eastern season with 4 points.

oai:ojs.ejournal.undip.ac.id:article/36380 2021-06-08T16:31:25Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/36380 2021-06-08T16:31:25Z Buletin Oseanografi Marina Vol 10, No 2 (2021): Buletin Oseanografi Marina; 123-132 Permata, Primaswatantri; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Suryono, Suryono; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Lokollo, Frijona F.; Pogram Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Pattimura Widianingsih, Widianingsih; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Endrawati, Hadi; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Zainuri, Muhammad; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Hartati, Retno; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2021-05-22 17:24:27 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/36380 Teripang; Kepadatan; Distribusi Ukuran; Padang Lamun; Pecahan Karang; Pulau Panjang id Holothuria atra merupakan salah satu teripang dan sering dijumpai berasosiasi dengan padang lamun dan  substrat pasir.  Walaupun bernilai ekonomi rendah, secara ekologi mempunyai manfaat sebagai bioturbator dan mempunyai potensi dalam bidang farmaseutical. Teripang ini ditenukan hidup di Pulau Panjang, dengan karakteristik perairan tertutup dan dangkal dengan akses yang mudah untuk wisatawan maupun perikanan tangkap yang dapat menjadi tekanan bagi populasi teripang tersebut. Penelitian ini bertujuan untuk untuk mengetahui hubungan panjang dan berat populasi teripang H. atra di Pulau Panjang, Jepara pada lokasi padang lamun dan pecahan karang dimana H. atra banyak ditemukan. Metode penelitian yang dipergunakan adalah metode deskriptif eksploratif dengan melakukan pengambilan sampel H. atra dengan teknik sampling complete enumeration pada luas lokasi penelitian yang telah ditentukan.  Hasil penelitian  menunjukkan kepadatan teripang di stasiun padang lamun (Stasiun A) lebih rendah dengan distribusi ukuran yang lebih kecil daripada di stasiun pecahan karang (Stasiun B). Pada semua stasiun dan waktu pengambilan sampel, pola pertumbuhan relatif yang ditunjukkan oleh hubungan panjang dan berat teripang H. atra bersifat allometrik negatif dengan keeratan hubungan yag sangat kecil. Hal ini disebabkan oleh kesulitan pengukuran pada teripang yang bertubuh lunak dengan elastisitas dinding tubuh (integument), isi pada sistem pencernaan makanannya dan kandungan cairan coelomic (rongga tubuh) yang dapat membuat bias analisa.Holothuria atra is one of species sea cucumbers often found in association with seagrass beds and sand substrates. Although it has low economic value, ecologically it has benefits as a bioturbator and has potential in the pharmaceutical. It is found in Panjang Island, which has characteristic of  closed and shallow waters with easy access for tourists and capture fisheries which can put pressure on the sea cucumber population. This study aimed to determine the relationship between length and weight of H. atra population in the seagrass bed and rubble area in Panjang Island, Jepara. The research method used is descriptive exploratory and H. atra were sampled using a complete enumeration sampling technique at a predetermined area of the research location. The results showed that the density of sea cucumbers at the seagrass beds station (Station A) was lower with a smaller size distribution than at the rubble station (Station B). At all stations and sampling times, the relative growth pattern shown by the correlation between length and weight of H. atra is negative allometric with very small relationship value. This was due to the difficulty of measuring soft-bodied sea cucumbers with the elasticity of the body wall (integument), the contents of the digestive system and coelomic fluid in the body cavity which can bias the analysis.

oai:ojs.ejournal.undip.ac.id:article/48042 2024-11-04T07:16:45Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/48042 2024-11-04T07:16:45Z Buletin Oseanografi Marina Vol 13, No 3 (2024): Buletin Oseanografi Marina; 401-408 Kirana, Nadia Astrid; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Endrawati, Hadi; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Nuraini, Ria Azizah Tri; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2024-10-30 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/48042 lamun; nitrat; fosfat; Thalassia hemprichii seagrass; nitrate; phosphate; Thalassia hemprichii id Ekosistem lamun memiliki produktivitas primer yang tinggi sehingga dapat mendukung kelimpahan ikan dan invertebrata serta turut menjaga kelestariannya. Nutrien berupa nitrat dan fosfat merupakan makro nutrien yang sangat penting bagi proses pertumbuhan dan perkembangan lamun. Pembentukan klorofil lamun dapat dipengaruhi oleh nutrien berupa nitrat dan fosfat. Penelitian ini bertujuan untuk mengetahui konsentrasi nutrien nitrat dan fosfat pada air dan sedimen serta kandungan klorofil lamun Thalassia Hemprichii di perairan Teluk Awur dan Pulau Kemujan. Sampel daun lamun T. Hemprichii diambil dari perairan Teluk Awur dan perairan Pulau Kemujan bersamaan dengan sampel air dan sedimen perairan. Sampel daun lamun T. Hemprichii dalam keadaan basah digerus kemudian ditimbang sebanyak 100 mg. Sampel dilarutkan menggunakan 10 ml Aseton 90%. Dilakukan sentrifuge dengan kecepatan 1000 rpm selama 5 menit lalu hasil supernatannya dipindahkan ke dalam botol vial. Analisis klorofil menggunakan spektrofotometer UV-Vis. Hasil yang telah didapatkan menunjukkan bahwa pada lokasi yang berbeda terdapat perbedaan kandungan klorofil. Kandungan klorofil di perairan Pulau Kemujan lebih tinggi apabila dibandingan dengan perairan Teluk Awur. Hasil konsentrasi nitrat dan fosfat perairan dan sedimen ditemukan cenderung memiliki nilai yang lebih baik di lokasi perairan Teluk Awur apabila dibandingkan dengan perairan Pulau Kemujan.  Seagrass ecosystems have very high primary productivity so that they can support the abundance and diversity of fish and invertebrates and contribute to their sustainability. Nutrients in the form of nitrate and phosphate are macronutrients that are very important for the growth and development of seagrass ecosystems. The formation of chlorophyll in seagrass leaves can be influenced by nutrients in the form of nitrate and phosphate. This study aims to determine the consentration of nitrate and phosphate nutrients in water and sediment and the chlorophyll content of seagrass T. Hemprichii in the waters of Teluk Awur and Kemujan Island. Seagrass leaf samples of T. Hemprichii were taken from the waters of Teluk Awur and the waters of Kemujan Island along with samples of water and water sediments. Samples of T. Hemprichii seagrass leaves were ground wet and then weighed as much as 100 mg. The sample was dissolved using 10 ml of 90% Acetone. Centrifuge at 1000 rpm for 5 minutes. Then the supernatant was transferred to a vial. Chlorophyll analysis using UV-Vis spectrophotometer. The results that have been obtained indicate that at different locations there are differences in chlorophyll content. The chlorophyll content in the waters of Kemujan Island is higher when compared to the waters of Teluk Awur. The results of nitrate and phosphate concentrations in waters and sediments were found to have a better value in the waters of Teluk Awur when compared to the waters of Kemujan Island.

oai:ojs.ejournal.undip.ac.id:article/11298 2020-04-17T12:02:18Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/11298 2020-04-17T12:02:18Z Buletin Oseanografi Marina Vol 5, No 1 (2016): Buletin Oseanografi Marina; 64-72 Sulardiono, Bambang; Program Studi Manajemen Sumberdaya Perairan Jurusan Perikanan Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro, 2016-04-03 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/11298 en Terdapat beragam spesies teripang (Holothurians) yang hidup di Perairan Karimunjawa, yang menempati berbagai substrat dasar pada ekosistem terumbu karang. Teripang bernilai ekonomis. Penangkapan dilakukan secara terus menerus tanpa adanya pengawasan. Hal  inilah yang menyebabkan jumlah populasi teripang H. scabra menurun dengan tajam. Oleh sebab itu perlu diadakan penelitian untuk mengetahui kondisi potensi teripang (holothurians) tersebut. Tujuan penelitian adalah mengetahui (a) komposisi spesies teripang di perairan Karimunjawa  (b) potensi populasi teripang di perairan Karimunjawa, dan (c) potensi pemanfatan teripang di perairan Karimunjawa. Metode pengumpulan data menggunakan transek garis 100 m yang dimodifikasi untuk reef check. Pengukuran dilakukan selama 1 tahun dengan interval waktu 1 bulan. Lokasi penelitian di perairan Karimunjawa,   dibagi dalam 5 titik sampling yaitu stasiun A Menjangan Kecil, Stasiun B Legon Goprak, Stasiun C Karang Gumuk, Stasiun D Alang-alang, dan Stasiun E Mrican. Hasil penelitian menunjukkan bahwa terdapat 15 spesies  teripang yang termasuk dalam ordo Aspidochirotidae dan 2 famili yaitu 11 spesies dari famili  Holothuridae dan 4 spesies dari famili Stichopodidae. Potensi biomassa populasi seluruh spesies yang dimanfaatkan dalam area studi sampai pada kedalaman 10 m, diketahui sebesar 44.641.789  individu dengan nilai potensi leatari (MSY) sebesar 24.590.814  individu per tahun, dengan kuota pengambilan yang diperbolehkan  sebesar 20.277.981  individu per tahun. Potensi biomassa populasi spesies yang paling rendah adalah H. scabra, Actinopyga sp, dan A. lecanora masing-masing sebesar 756.594 individu, 756.458 individu, dan 1.134.823 individu,  dengan nilai potensi lestari (MSY) masing – masing untuk H. scabra sebesar 378.297 individu per tahun, Actinopyga sp sebesar 567.411 individu per tahun dan A. lecanora sebesar 378.229 individu per tahun, serta dengan kuota pengambilan masing-masing sebesar  302.637individu per  tahun, 302.583 individu per tahun, dan  302.583  individu per tahun. Untuk dapat meningkatkan populasi Sumberdaya teripang (Holothurian) di perairan Karimunjawa secara lestari, maka strategi yang dilakukan adalah dengan mengembangkan sifat altruistik positip (responsible optimistic).   Kata kunci : teripang, potensi lestari, dan kuota tangkapan

oai:ojs.ejournal.undip.ac.id:article/30189 2022-05-20T01:15:04Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/30189 2022-05-20T01:15:04Z Buletin Oseanografi Marina Vol 11, No 1 (2022): Buletin Oseanografi Marina; 111-122 Seprandita, Cornelia Widya; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Suprijanto, Jusup; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Ridlo, Ali; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2022-01-30 16:19:40 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/30189 Mikroplastik; FT-IR; Perairan Pulau Karimunjawa id Kepulauan Karimunjawa merupakan salah satu Kawasan Taman Nasional yang terdapat di Indonesia yang terdiri dari beberapa zonasi yang disesuaikan dengan fungsi dan peruntukkannya yaitu Zona Inti, Zona Perlindungan, Zona Pemanfaatan Bahari, Zona Rehabilitasi, Zona Pemanfaatan Perikanan Nasional, dan Zona Pemukiman. Penelitian ini bertujuan untuk mengetahui kelimpahan mikroplastik di perairan Pulau Cemara Kecil, Pulau Menjangan Kecil, dan Pelabuhan Syahbandar Karimunjawa. Sampel diambil dengan cara menyaring permukaan air laut dengan plankton net sepanjang 100 meter menggunakan perahu. Sampel air laut sebanyak 250mL ditambahkan larutan H2O2 30% 250 mL dan disaring dengan kertas Whatman No. 42. Mikroplastik yang diperoleh dianalisis bentuk, warna, dan jumlah kelimpahannya menggunakan mikroskop elektron dengan perbesaran 100 kali. Jenis mikroplastik ditentukan dengan Uji FT-IR. Hasil penelitian menunjukkan bahwa perairan Pelabuhan Syahbandar memiliki kelimpahan mikroplastik tertinggi yaitu 19,98 partikel/m3, diikuti perairan Pulau Menjangan Kecil yaitu sebesar 17,21 partikel/m3 dan paling kecil di perairan Pulau Cemara Kecil yaitu 14,8 partikel/m3. Bentuk mikroplastik yang ditemukan adalah fragment, fiber, film, dan pellets. Jenis mikroplastik diduga adalah High-density polyethylene (HDPE), Low-density polyethylene (LDPE), Polystyrene (PS), Polypropylene (PP), Polyvinyl chloride (PVC), Nitrile, Nylon, dan Cellulose acetate (CA) atau Rayon.  Karimunjawa Islands is one of the National Park Areas in Indonesia which consists of several zones that are adapted to their functions and purposes, namely the Core Zone, Protection Zone, Maritime Use Zone, Rehabilitation Zone, National Fisheries Utilization Zone, and Resettlement Zone. This study aims to determine the abundance of microplastics in Cemara Kecil Island, Menjangan Kecil Island, and Syahbandar Harbor. Samples were taken by filtering the surface of seawater with a 100-meter long plankton net using a boat. 250 mL of seawater samples added H2O2 30% 250 mL and distributed with Whatman No. paper. 42. Microplastic shapes, colors, and abundance are obtained using an electron microscope with a magnification of 100 times. The microplastic type was determined by FT-IR Test. The results showed the fact that the Port of Syahbandar had the highest microplastic abundance of 19.98 particles / m3, followed by Menjangan Kecil Island at 17.21 particles / m3 and the smallest at Cemara Kecil Island was 14.8 particles / m3. The microplastic forms found are fragments, fibers, films, and pellets. Microplastic types are High-density polyethylene (HDPE), low-density polyethylene (LDPE), Polystyrene (PS), Polypropylene (PP), Polyvinyl chloride (PVC), Nitrile, Nylon, and Cellulose acetate (CA) or Rayon.  

oai:ojs.ejournal.undip.ac.id:article/2969 2012-04-03T02:39:41Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/2969 2012-04-03T02:39:41Z Buletin Oseanografi Marina Vol 1, No 1 (2011): Buletin Oseanografi Marina Yusuf, Muh. The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/2969 en Abstract The research was done to know: (1) the condition of waters quality, (2) community structure of macrozoobenthos of estuarine of Babon river of Semarang. The research method is case study. Sampling was done three times, with the time interval between 14-15 days. The re research was done from April until November, 2005 at estuarine of babon river, Genuk District, Semarang City. Based on the result of measurement of physical-chemical paremeters showed that several parameter include : total suspended solid, oxygen, BOD5, COD, ammonia, deterjen, and heavy metal Cr6+ and Cd have passed over sea water quality standard. The diversity index (H’) range from low to middle that is between 0,36 – 2,27. Whereas the equatability indeks (E) range from low to high that is between 0,33 – 0,96. Key words : waters quality, community structure, macrozoobenthos

oai:ojs.ejournal.undip.ac.id:article/70748 2026-02-11T04:49:13Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/70748 2026-02-11T04:49:13Z Buletin Oseanografi Marina Vol 14, No 2 (2025): Buletin Oseanografi Marina; 267-276 Fa'u, Yosepine Cinta Tyas Gusti; Department of Marine Science, Faculty of Marine Science and Fisheries, Universitas Maritim Raja Ali Haji Pranowo, Widodo Setiyo; Research Center for Climate and Atmosphere (PRIMA), National Research and Innovation Agency Indonesian Naval Postgraduate Military Service School Suhana, Mario Putra; Department of Marine Science, Faculty of Marine Science and Fisheries, Universitas Maritim Raja Ali Haji Mujiasih, Subekti; Research Center for Climate and Atmosphere (PRIMA), National Research and Innovation Agency Hatmaja, Rahaden Bagas; Research Center for Climate and Atmosphere (PRIMA), National Research and Innovation Agency Ratnawati, Herlina Ika; Research Center for Climate and Atmosphere (PRIMA), National Research and Innovation Agency Apdillah, Dony; Department of Marine Science, Faculty of Marine Science and Fisheries, Universitas Maritim Raja Ali Haji 2025-06-10 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/70748 Admiralty; Wind; Least Square; Tides; Bintan Island en Geographically, Mantang Island is situated between the Malacca Strait, Natuna Sea, and Karimata Strait, and is exposed to the open sea, which influences the oceanographic dynamics of the region. The island’s residents are heavily dependent on the sea for their livelihoods, making wind and sea tides crucial for meeting their daily needs. Consequently, this study aimed to measure wind data and sea surface elevation over a 30-day period, with the results visualized using a wind rose diagram. The specific objectives were: 1) to calculate harmonic constants using both the Least Squares and Admiralty methods to obtain FormZahl numbers, 2) to determine the characteristics of sea surface elevation based on each method, and 3) to analyze the relationship between sea surface elevation and wind speed. The findings revealed that the wind in the waters surrounding Mantang Island was primarily influenced by the monsoon, blowing from the west with maximum speeds ranging from 5.70 to 8.80 m/s. Each calculation method produced varying values for sea surface elevation, including Zo, HHWL, LLWL, MHWL, and MLWL, with respective values of 11.99 m, 15.9 m, 8 m, 17.9 m, and 6 m. FormZahl number calculations yielded values of 1.25 and 1.03 using the Least Squares and Admiralty methods, respectively. Despite the differences in the results, both methods indicated a mixed semi-diurnal tidal pattern. To examine the relationship between wind and sea surface elevation, a 6th-order polynomial regression analysis was performed. The analysis revealed a weak correlation, with a coefficient of determination (R²) of 0.21 and a Root Mean Square Error (RMSE) of 0.30. These values suggest that the model’s predictions were relatively close to actual field conditions. 

oai:ojs.ejournal.undip.ac.id:article/19038 2020-04-17T12:05:29Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/19038 2020-04-17T12:05:29Z Buletin Oseanografi Marina Vol 7, No 1 (2018): Buletin Oseanografi Marina; 15-21 Supriyantini, Endang; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Santosa, Gunawan Widi; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Alamanda, Ladies Nikita; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2018-05-24 17:39:40 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/19038 Gracilaria sp.; Pertumbuhan; Growth; Copper en Budidaya rumput laut banyak dilakukan untuk memenuhi dan meningkatkan produksinya, namun masih banyak kendala, sehingga hasil produksinya belum stabil. Hal ini dapat dilihat dengan pemberian nutrien yang diharapkan akan meningkatkan pertumbuhannya. Tujuan dari penelitian untuk mengetahui pertumbuhan dan kemampuan absorpsi Gracilaria sp. pada media yang mengandung Cu dengan konsentrasi yang berbeda. Metode yang digunakan adalah metode eksperimental laboratoris dengan Rancangan Acak Lengkap (RAL). Perlakuan penambahan konsentrasi Cu pada media pemeliharaan yang terdiri dari 4 tingkat yaitu kontrol (0,036 ppm, sesuai dengan konsentrasi Cu pada air laut), 0.5 ppm, 5 ppm, dan 50 ppm dengan 3 pengulangan. Hasil memperlihatkan bahwa penambahan Cu dengan konsentrasi yang berbeda  memiliki pengaruh nyata (p < 0,05) terhadap pertumbuhan dan kemampuan absorpsi pada Gracilaria sp. Pertumbuhan Gracilaria sp. tertinggi dicapai pada perlakuan A (kontrol) dengan pertambahan berat sebesar 25,34 g dan laju petumbuhan spesifik (SGR) sebesar 0,43%. Nilai pertumbuhan mutlak dan laju pertumbuhan spesifik (SGR) yang didapatkan pada perlakuan B (0,5 ppm) sebesar  -80,37 g dan -1,84% per hari, perlakuan C (5 ppm) sebesar -85,19 g dan -2,02% per hari, dan perlakuan D (50 ppm) sebesar -99,19 g dan -2,47% per hari. Semakin tinggi konsentrasi Cu yang diberikan maka pertumbuhan Gracilaria sp. akan semakin rendah. Seaweed cultivation is done to meet and improve its production, but there are still many obstacles, so its results are not yet stable. This can be seen with the awarding of the nutrients that will hopefully increase its growth. The goal of the research is to know the growth and absorption ability of Gracilaria SP. in medium containing different concentrations of Cu with. The method used is the method of experimental design of randomized Complete laboratories (RAL). Addition of Cu concentration on treatment of media maintenance which consists of 4 levels, namely control (0.036 ppm, according to the concentration of Cu in sea water), 0.5 ppm, 5 ppm and 50 ppm, with three repetitions. The results showed that the addition of Cu with a different concentration of real influence (p < 0.05) towards growth and the ability of absorption on Gracilaria sp. Highest growth of Gracilaria sp. was achieved on A treatment (control) and the increase of the weight of 25.34 g and specific growth rate (SGR) of 0.43%. The absolute growth rate and specific growth rate (SGR) obtained at the treatment B (0.5 ppm) of -80.37g and-1.84% per day, treatment C (5 ppm) of -85.19 g and -2.02% per day, and treatment D (50 ppm) for -99.19 g and -2.47% per day. The higher the concentration of Cu given, then the growth of Gracilaria sp. will be even lower. 

oai:ojs.ejournal.undip.ac.id:article/46376 2023-05-13T09:22:51Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/46376 2023-05-13T09:22:51Z Buletin Oseanografi Marina Vol 12, No 1 (2023): Buletin Oseanografi Marina; 54-64 Saleky, Dandi; Jurusan Manajemen Sumberdaya Perairan, Fakultas Pertanian, Universitas Musamus Anggraini, Rika; Jurusan Ilmu Kelautan, Fakultas Ilmu Kelautan dan Perikanan, Universitas Maritim Raja Ali Haji Merly, Sendy L.; Jurusan Manajemen Sumberdaya Perairan, Fakultas Pertanian, Universitas Musamus Ruzanna, Arina; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Malikussaleh Isma, Muhammad Fauzan; Program Studi Budidaya Perairan Universitas Samudra Manan, Jemmy; Jurusan Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Papua Samad, Agus Putra Abdul; Program Studi Budidaya Perairan Universitas Samudra Ezraneti, Riri; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Malikussaleh Syahrial, Syahrial; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Malikussaleh 2023-02-04 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/46376 Terebralia palustris; Principal Component Analysis; Kepadatan; Merauke id Gastropoda banyak ditemukan di ekosistem mangrove dan sangat dipengaruhi oleh kondisi lingkungan maupun kerapatan hutan mangrove. Salah satu gastropoda yang ditemukan adalah Terebralia palustris yang sering dijadikan sebagai bioindikator kesehatan mangrove. Kajian T. palustris (Linnaeus 1767) dilakukan pada bulan September 2020 di hutan mangrove Pantai Payum Merauke Papua dengan 3 stasiun pengamatan. Kajian ini bertujuan untuk mengetahui kepadatan, hubungan panjang berat tubuh, kualitas dan penciri lingkungannya serta faktor penentu distribusi dan kepadatan T. palustris di Pantai Payum. T. palustris maupun mangrove dikumpulkan dengan membuat transek garis sepanjang 50 m tegak lurus garis pantai dan dibuat petak-petak contoh berukuran 10 x 10 m untuk mangrove serta 1 x 1 m (di dalam plot 10 x 10 m) untuk T. palustris. Hasil kajian memperlihatkan bahwa kepadatan T. palustris bervariasi di setiap stasiun pengamatan dengan kepadatan tertinggi berada pada Stasiun 2 (54,20 ind/m2) dan terendahnya pada Stasiun 3 (19,67 ind/m2). Pola pertumbuhan T. palustris bersifat allometrik negatif. Untuk kualitas lingkungan secara keseluruhan, hasil penghitungan memperlihatkan bahwa kerapatan mangrovenya tergolong tinggi (> 1000 ind/ha) dengan parameter kualitas perairan untuk suhunya berkisar antara 28,33 – 31,67°C, DO 5,60 – 7,67 mg/L, pH 6,83 – 7,53 dan salinitas 29,33 – 30,00‰. Analisis PCA memperlihatkan bahwa penyebaran stasiun pengamatan dan karakteristik lingkungan membentuk 2 kelompok dengan kelompok pertama Stasiun 3 dipengaruhi oleh salinitas, suhu, DO dan kerapatan mangrove yang tinggi, sedangkan kelompok kedua Stasiun 1 dan 2 dipengaruhi oleh pH yang tinggi serta diameter batang mangrove yang besar. Berdasarkan hasil analisis PCA, faktor penentu distribusi dan kepadatan T. palustris adalah suhu, DO dan kerapatan mangrove.   Many mangrove habitats contain gastropods, which are greatly influenced by environmental conditions and the density of mangrove trees. One of the gastropods discovered was Terebralia palustris, which is frequently employed as a bioindicator of mangrove health. A research of T. palustris (Linnaeus, 1767) was done in September 2020 at three observation sites in the mangrove forest of Payum Beach, Merauke Papua. This study aims to evaluate the density, the relationship between body length and weight, the quality and characteristics of the environment, and the distribution and density determinants of T. palustris in Payum Beach. T. palustris and mangroves were gathered by constructing a 50 m perpendicular to the seashore line transect and creating 10 x 10 m plots for mangroves and 1 x 1 m plots (within a 10 x 10 m plot) for T. palustris. The study revealed that the density of T. palustris fluctuated at each observation station, with the highest density occurring at Station 2 (54.20 ind/m2) and the lowest density occurring at Station 3 (19.67 ind/m2). The T. palustris growth pattern is negative allometric. The calculation findings indicate that the mangrove density is high (> 1000 ind/ha) and that the water quality parameters range from 28.33 to 31.67°C, DO 5.60 to 7.67 mg/L, pH 6.83 to 7.53, and salinity 29.33 to 30.00‰. PCA analysis revealed that the distribution of observation stations and environmental parameters formed two groups, with Station 3 influenced by salinity, temperature, DO, and a high mangrove density, and Stations 1 and 2 influenced by a high pH and a big mangrove trunk diameter. According to the results of PCA analysis, the distribution and density of T. palustris are determined by temperature, DO, and mangrove density.

oai:ojs.ejournal.undip.ac.id:article/6928 2014-05-20T06:22:10Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6928 2014-05-20T06:22:10Z Buletin Oseanografi Marina Vol 2, No 1 (2013): Buletin Oseanografi Marina; 58-65 Soenardjo, Nirwani; Jurusan Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro 2013-01-20 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6928 en Sindrome penyakit blotch yang menyerang karang massive mengakibatkan kehancuran sistem ekologi terumbu karang. Penyebaran penyakit ini berjalan sangat cepat dibandingkan dengan laju pertumbuhan karang. Tujuan penelitian ini adalah mengisolasi dan mengidentifikasi bakteri yang berasosiasi dengan sindrom penyakit pink-blotch (PBS) pada karang. Pelaksanaan penelitian  meliputi sampling karang yang dilakukan dengan ScubaDiving pada kedalaman 3 dan 10 meter, identifikasi dan dokumentasi jenis karang yang terserang penyakit secara in situ dengan underwatercamera Nikonos, isolasi dan purifikasi bakteri yang berasosiasi dengan sindrome penyakit blotch, contagious coral experiments skala laboratoris,   postulat Koch’s experiment dilakukan di dalam laboratorium dan di lapangan dengan teknik syringe. Identifikasi bakteri yang berasosiasi dengan penyakit karang PBS secara mikrobiologis dilakukan untuk mengetahui genus agen penyebab penyakit. Hasil penelitian menunjukkan bahwa bakteri yang berasosiasi dengan sindrome penyakit pink-blotch adalah genus Erythrobacter sp.   Kata kunci: terumbu karang, pink-blotch, Erythrobacter sp

oai:ojs.ejournal.undip.ac.id:article/76536 2026-02-11T04:57:56Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/76536 2026-02-11T04:57:56Z Buletin Oseanografi Marina Vol 15, No 1 (2026): Buletin Oseanografi Marina; 143-156 Arumsari, Julia Lestari; Program Studi S1 Manajemen Sumber Daya Perairan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Ayuningrum, Diah; Departemen Sumber Daya Akuatik, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Sabdaningsih, Aninditia; Departemen Sumber Daya Akuatik, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2026-02-25 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/76536 Ascidian kolonial; DNA barcoding; Filogenetik; Molekuler; PCR id Ascidian merupakan biota bentik yang hidup menempel pada ekosistem terumbu karang. Permasalahan terbatasnya informasi tentang jenis ascidian di Kepulauan Seribu serta minimnya eksplorasi ascidian menjadikan penelitian tentang identifikasi ascidian penting untuk dilakukan. Tujuan penelitian ini untuk mengetahui spesies ascidian kolonial dan kekerabatan antar spesies yang ditemukan di ekosistem terumbu karang Pulau Tidung dan Pulau Pari berdasarkan metode deskriptif eksploratif. Hasil penelitian menunjukkan lima spesies ascidian kolonial yang digunakan dalam penelitian ini berasal dari dua famili yang berbeda yaitu satu jenis Leptoclinides sp. dan tiga jenis Didemnum sp. yang berasal dari Famili Didemnidae; satu jenis  Aplidium sp. yang berasal dari Famili Polyclinidae. Berdasarkan proses identifikasi molekuler melalui proses optimasi volume DNA template dan suhu annealing, hanya satu dari lima sampel yang berhasil diamplifikasi menggunakan dua pasang primer yang berbeda. Sampel tersebut berkode PT02-02 (B) yang berasal dari Pulau Tidung dan diamplifikasi menggunakan primer Did forward  dan primer Did reverse. Hasil identifikasi spesies ascidian kolonial sampel PT02-02(B) memiliki query lenght sebesar 597 bp. Hasil BLAST pada website NCBI menunjukkan sampel PT02-02 (B) memiliki kemiripan dengan spesies Aplidium sp. dengan nilai Query Cover 98% dan Per. Ident 80,31%. Hasil filogenetik spesies Aplidium sp. dengan Aplidium accarense yang ditemukan di Laut Mediterania Timur menunjukkan nilai bootstrap sebesar 90%.  Ascidians are benthic organisms that live attached to coral reef ecosystems. The limited information available on ascidian species in the Thousand Islands and the lack of ascidian exploration make research on ascidian identification important to conduct. The objective of this study is to identify colonial ascidian species and their phylogenetic relationships found in the coral reef ecosystems of Tidung Island and Pari Island using an exploratory descriptive method. The results of the study showed that the five colonial ascidian species used in this study belonged to two different families: one species of Leptoclinides sp. and three species of Didemnum sp. from the Didemnidae family; and one species of Aplidium sp. from the Polyclinidae family. Based on molecular identification through optimization of DNA template volume and annealing temperature, only one of the five samples was successfully amplified using two pairs of different primers. The sample, coded PT02-02 (B), originated from Tidung Island and was amplified using the Did forward primer and Did reverse primer. The species identification results for the colonial ascidian sample PT02-02(B) had a query length of 597 bp. BLAST results on the NCBI website showed that sample PT02-02 (B) was similar to the species Aplidium sp. with a Query Cover value of 98% and Per. Ident 80.31%. The phylogenetic results of Aplidium sp. with Aplidium accarense found in the Eastern Mediterranean Sea showed a bootstrap value of 90%.

oai:ojs.ejournal.undip.ac.id:article/23924 2020-09-27T10:49:01Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/23924 2020-09-27T10:49:01Z Buletin Oseanografi Marina Vol 9, No 1 (2020): Buletin Oseanografi Marina; 1-8 Ismunarti, Dwi Haryo; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Zainuri, Muhammad; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Sugianto, Denny Nugroho; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Saputra, Suradi Widjaya; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2020-04-30 08:00:11 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/23924 instrumen penelitian; reliabilitas; Intraclass Correlation Coefficients id Instrumen penelitian adalah alat ukur yang digunakan secara sistematis untuk mengumpulkan data penelitian. Hasil penelitian yang baik diperoleh jika instrumen yang digunakan valid dan reliabel. Reliabilitas instrumen menunjukkan ketepatan atau sejauh mana hasil pengukuran instrumen dapat direplikasi. Reliabilitas menjadi salah satu parameter penting dalam menentukan kualitas suatu instrumen. Penelitian ini bertujuan untuk memilih statistik uji yang paling tepat terhadap pengujian reliabilitas terhadap instrumen untuk konsentrasi klorofil-a perairan. Data konsentrasi klorofil-a perairan diperoleh dari dua instrumen yaitu : metode spektrofotometri dari 14 stasiun pengamatan di Teluk Semarang Jawa Tengah dan penginderaan jauh. Statistik uji yang paling tepat digunakan adalah Intraclass Correlation Coefficients (ICC). Nilai  ICC adalah rasio antara varians objek terhadap varians total. Hasil penelitian diperoleh nilai ICC = 0,83 artinya 83 % keragaman data disebabkan keragaman objek dalam hal ini stasiun penelitian. Tidak terdapat bias pengukuran konsentrasi klorofil-a dari kedua instrumen, karena reliabilitas kedua instrumen mendekati sempurna. A research instrument is a measuring tool used systematically to collect the data. A good result of the research is obtained if the instrument is reliable. The reliability of the instrument showed accuracy on instrument measurement could be replicated. Reliability is one of the important parameters in determining the quality of the device. This study is aimed at selecting the most appropriate test of statistics in the reliability of the instrument for chlorophyll-a water concentrations. The data of chlorophyll-a waters concentration is gained from two instruments called spectrophotometric method from 14 observation stations in Semarang Bay, Central Java, and remote sensing. The best test statistic is the Intraclass Correlation Coefficients (ICC). The value on ICC is the ratio between the variance of the object at total variance. The results showed that ICC = 0.83, meaning that 83% of a variety of data is due to the diversity of objects in these research stations. There is no bias in measuring the chlorofil-a concentration using the two instruments because the reliability of the two devices is closely perfect.

oai:ojs.ejournal.undip.ac.id:article/6954 2014-05-22T09:03:53Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6954 2014-05-22T09:03:53Z Buletin Oseanografi Marina Vol 2, No 3 (2013): Buletin Oseanografi Marina; 81-93 Hakim, Buddin A; Jln. Imam Bardjo, SH. 6 UNDIP Semarang Suharyanto, Suharyanto; Jln. Imam Bardjo, SH. 6 UNDIP Semarang Hidajat, Wahju Krisna; Jln. Imam Bardjo, SH. 6 UNDIP Semarang 2013-07-22 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6954 en Adanya interaksi lautan dan daratan akan berpengaruh terhadap kondisi Pantai, Perairan Semarang yang berbatasan langsung dengan laut lepas berpotensi terjadi abrasi akibat dari energi gelombang yang mengenai daratan, faktor kenaikan air laut sebagai pengaruh dari perubahan iklim secara langsung akan mempengaruhi luasan abrasi yang terjadi. Penelitian bertujuan untuk mengetahui proyeksi kenaikan air laut, memperkirakan daerah abrasi serta mengetahui efektifitas bangunan groin dalam menanggulangi abrasi di Pantai Semarang. Identifikasi daerah abrasi dan tingkat efektifitas penanggulangan abrasi dilakukan dengan pemodelan menggunakan software CEDAS 2.01 sedangkan analisis spasial menggunakan software ArcGIS 9.3, sebagai inputan model data didapatkan dari analisis data Angin dan data pasang surut Kota Semarang serta survei data lapangan mengenai morfologi pantai dan kondisi sedimen di lokasi penelitian. Dari analisis data Pasang Surut didapatkan Proyeksi Kenaikan Muka Air Laut di Perairan Semarang diberikan dengan persamaan regresi y = 8,8209 x – 17367, R2 = 0,9453, dengan nilai kenaikan air laut sebesar 7.806 cm/tahun. Dari Hasil pemodelan didapatkan bahwa jika tidak ada upaya perlindungan yang dilakukan di Pantai maka pada tahun 2015 dilokasi penelitian akan mengalami abrasi sebesar 116.307 m2 dan meningkat pada tahun 2020 sebesar 174.593 m2 dengan lokasi abrasi berada di Kelurahan Jerakah, Tugurejo Karanganyar, Randu Garut, dan Kelurahan Mangkang Wetan, sedangkan dari skenario penambahan bangunan pantai jenis groin untuk menanggulangi abrasi didapatkan bahwa pembangunan Groin dengan jarak yang semakin pendek antara groin satu dengan yang lainnya lebih efektif dalam menanggulangi abrasi pantai di lokasi penelitian dibandingkan dengan pembangunan Groin yang panjang tetapi jarak antar groinnya terlalu panjang.   Kata Kunci : Kenaikan Air Laut, Prediksi Daerah Abrasi, Efektifitas Bangunan, Pantai Semarang

oai:ojs.ejournal.undip.ac.id:article/31359 2021-02-01T08:06:40Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/31359 2021-02-01T08:06:40Z Buletin Oseanografi Marina Vol 10, No 1 (2021): Buletin Oseanografi Marina; 42-50 Mayasari, Vita Fitriana; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Pribadi, Rudhi; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Soenardjo, Nirwani; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2021-02-01 10:08:07 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/31359 Mangrove; Rehabilitasi; Konservasi; Valuasi Ekonomi id Ekosistem mangrove memiliki fungsi fisik, ekologi, dan ekonomi bagi manusia. Pemanfaatan mangrove yang tidak konservatif dapat menimbulkan kerusakan mangrove dan abrasi. Pemulihan ekosistem mangrove dengan rehabilitasi dan konservasi dapat meningkatkan pendapatan masyarakat. Peningkatan pendapatan masyarakat ini mendorong diperlukannya perhitungan valuasi ekonomi terhadap ekosistem mangrove. Tujuan dari penelitian ini adalah mengetahui total use value dan non use value ekosistem mangrove di Desa Timbulsloko, Kecamatan Sayung, Kabupaten Demak. Metode yang digunakan dalam penelitian ini adalah metode deskriptif untuk menghimpun data monografi terkait ekosistem mangrove dan metode eksploratif untuk penentuan use value dan non use value ekosistem mangrove. Responden penelitian adalah 30 orang terdiri dari 29 masyarakat dan 1 orang perangkat desa yang berkaitan dengan keberadaan ekosistem mangrove secara langsung dan tidak langsung. Penelitian dilakukan pada Bulan September – Desember 2017. Hasil penelitian menunjukan nilai total ekonomi ekosistem mangrove di Desa Timbulsloko adalah Rp 164.897.377,1/ha/tahun atau Rp 12.703.693.939/ tahun dengan luasan ekosistem mangrove 77,04 ha. Nilai tersebut terdiri dari total use value dan non use value dari sektor perikanan dan kelautan yang terkait dengan ekosistem mangrove. Use value sebesar Rp 11.095.403.189/tahun atau Rp 144.021.329/ha/tahun. Use value meliputi nilai guna langsung, nilai guna tidak langsung, dan nilai pilihan. Sedangkan non use value sebesar Rp 1.608.290.750/tahun atau Rp 20.876.048,16/ha/tahun. Non use value meliputi nilai keberadaan dan nilai warisan.   Mangrove ecosystem has physical, ecological and economical functions for humans. Non conservative use of mangrove can cause mangrove damage and abrasion. Restoration of mangrove ecosystems with rehabilitation and conservation can increase community income. The increasing of community income can cause the need of economic valuation calculations for the mangrove ecosystem. The purpose of this study was to determine the total of use value and non-use value of the mangrove ecosystem in Timbulsloko Village, Sayung District, Demak Regency. The method used in this study was a descriptive method to collect monograph data related to mangrove ecosystems and an exploratory method for determining use value and non-use value of the mangrove ecosystem. The research respondents were 30 residents consisting of 29 communities and 1 village officer who were directly and indirectly related to the existence of the mangrove ecosystem. This researched was conducted in September – December 2017. The result showed that the total economic value of the mangrove ecosystem in Timbulsloko Village was Rp. 164,897,377.1 / ha / year or Rp. 12,703,693,939 / year in 77.04ha of mangrove ecosystem area range. This value consists of the total use value and non-use value from the fisheries and marine sector which associated with the mangrove ecosystem. The use value of IDR 11,095,403,189 / year or IDR 144,021,329 / ha / year. The use values include direct use value, indirect use value, and option value. Meanwhile, the non-use value is IDR 1,608,290,750 / year or IDR 20,876,048.16 / ha / year. The non-use values include existence value and bequest value.  

oai:ojs.ejournal.undip.ac.id:article/64406 2024-07-04T18:54:21Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/64406 2024-07-04T18:54:21Z Buletin Oseanografi Marina Vol 13, No 2 (2024): Buletin Oseanografi Marina; 303-310 Aini, Firly Nur; Oceanography Department, Faculty of Fisheries and Marine Science, Universitas Diponegoro Indarjo, Agus; Center for Coastal Rehabilitation and Disaster Mitigation Studies, Universitas Diponegoro Marine Science Department, Faculty of Fisheries and Marine Science, Universitas Diponegoro Zainuri, Muhammad; Oceanography Department, Faculty of Fisheries and Marine Science, Universitas Diponegoro Marine Science Department, Faculty of Fisheries and Marine Science, Universitas Diponegoro Endrawati, Hadi; Marine Science Department, Faculty of Fisheries and Marine Science, Universitas Diponegoro Redjeki, Sri; Marine Science Department, Faculty of Fisheries and Marine Science, Universitas Diponegoro Pribadi, Rudhi; Marine Science Department, Faculty of Fisheries and Marine Science, Universitas Diponegoro Setiyono, Heryoso; Oceanography Department, Faculty of Fisheries and Marine Science, Universitas Diponegoro Suryoputro, Agus Anugroho Dwi; Oceanography Department, Faculty of Fisheries and Marine Science, Universitas Diponegoro 2024-06-08 09:58:15 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/64406 Coastal Waters; Geospatial; Anthropogenic; Mojo Estuary; Pemalang en Total suspended solids (TSS) concentrations and distribution provide information to determine the quality of the carrying capacity of waters as marine resources. The purpose of the research is to analyze the concentration and distribution of TSS in marine waters due to anthropogenic impacts on land. The concentration and distribution changes of TSS were analyzed using a geospatial model approach. The in-situ data were collected in September 2023 at 14 stations in the east monsoon and analyzed in the laboratory using the gravimetric method. The results show that TSS concentration range from 29.2–52.6 mg/L. The distribution of MPT content in the Mojo River Estuary, Pemalang has several groups of stations with convergent forms, where the high source of MPT comes from around the lagoon, namely the aquaculture and mangrove areas, then in general it is also affected by waste from anthropogenic activities of the, surrounding industries seasonal currents, which are related to wind and seasons, as well as currents due to waters from tides.

oai:ojs.ejournal.undip.ac.id:article/11222 2016-06-08T00:06:46Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/11222 2016-06-08T00:06:46Z Buletin Oseanografi Marina Vol 1, No 2 (2012): Buletin Oseanografi Marina; 65-70 Chilmawati, Diana; Fakultas Perikanan dan Ilmu Kelautan UNDIP Suminto, Suminto; Fakultas Perikanan dan Ilmu Kelautan UNDIP 2012-01-03 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/11222 en Kuantitas dan kualitas sel diatom, Chaetoceros gracilis menjadi pembatas utama dalam produksi perikanan di hatchery.  Diduga kultur diatom mengalami pertumbuhan yang tidak stabil karena terkontaminasi oleh bakteri atau mikroorganisme lain.  Sel diatom tersebut akan mengalami penurunan produksi dan nilai nutrisinya dan apabila digunakan sebagai pakan alami akan menghambat pertumbuhan dan perkembangan larva.  Salah satu cara untuk memecahkan masalah tersebut adalah dengan pencucian sel bibit / inokulan diatom yang dibudidayakan. Tujuan dari penelitian ini adalah mengkaji pengaruh pencucian sel terhadap pola pertumbuhan sel diatom (C. gracilis) dan nilai nutrisi atau kandungan protein sel diatom tersebut pada fase kepadatan maksimum. Penelitian ini menggunakan Rancangan Acak Lengkap (RAL) dengan 4 perlakuan yaitu tanpa pencucian sel; satu kali pencucian sel; dua kali pencucian sel dan tiga kali pencucian sel. Hasil penelitian menunjukkan bahwa pencucian sel berpengaruh nyata (p<0,05) terhadap pola pertumbuhan sel diatom (C. gracilis) dimana dapat mempersingkat durasi waktu adaptasi, memperpanjang fase stasioner dan menghasilkan kepadatan sel maksimum lebih tinggi.  Pencucian sel juga dapat meningkatkan nilai nutrisi atau kandungan protein sel diatom (C. gracilis) pada fase kepadatan maksimum.   KATA-KATA KUNCI : pencucian sel diatom, Chaetoceros gracilis, pertumbuhan dan nilai nutrisi

oai:ojs.ejournal.undip.ac.id:article/38256 2022-05-20T01:15:04Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/38256 2022-05-20T01:15:04Z Buletin Oseanografi Marina Vol 11, No 1 (2022): Buletin Oseanografi Marina; 19-29 https://ejournal.undip.ac.id/index.php/buloma/article/download/38256/116791 Yaqin, Nurul; Departemen Sumberdaya akuatik, Universitas Diponegoro Rizkiyah, Mayang; Departemen Sumberdaya akuatik, Universitas Diponegoro Putra, Epafras Andrew; Departemen Sumberdaya akuatik, Universitas Diponegoro Suryanti, Suryanti; Departemen Sumberdaya akuatik, Universitas Diponegoro Febrianto, Sigit; Departemen Sumberdaya akuatik, Universitas Diponegoro 2022-01-30 16:19:34 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/38256 : serapan CO2; stok CO2; mangrove; Desa Tugurejo id Pemanasan global ditandai dengan meningkatnya suhu permukaan bumi yang diakibatkan meningkatnya konsentrasi gas rumah kaca diatmosfer seperti gas CO2 dan CH4 yang dihasilkan dari sektor industri, aktivitas transportasi, dan kegiatan pertanian maupun peternakan. Ekosistem mangrove memiliki fungsi ekologis yang penting bagi wilayah pesisir sebagai penyerap dan penyimpan karbon dalam upaya mitigasi pemanasan global. Kawasan pesisir pantai di Desa Tugurejo yang memiliki mangove adalah wilayah Tapak. Luas mangrove di kawasan Tapak mencapai ±3,00 Ha. Maka perlu adanya penelitian tentang potensi mangrove tersebut sebagai penyerap dan penyimpan karbon. Tujuan dilakukannya penelitian ini adalah mengetahui estimasi simpanan dan serapan CO2 dikawasan desa Tugurejo Semarang. Metode yang digunakan dalam penelitian ini yaitu metode survey. Simpanan karbon pada batang mangrove menggunakan metode non-destructive sampling dengan persamaan alometrik untuk jenis dan penentuan karbon organik serasah dan sedimen menggunakan metode LOI (Loss On Ignition). Penentuan stasiun menggunakan metode purposive sampling.Hasil penelitian yang diperoleh ditemukan 2 jenis mangrove yaitu Rhizopora mucronata dan Avicennia marina. Kandungan karbon pada tegakan mangrove sebesar 399,06 tonC/ha. Serapan CO2 pada tegakan sebesar 1.463,22 ton/ha. Kandungan karbon pada sedimen 760,908 tonC/ha. Serapan CO2 pada sedimen sebesar 2.789,996 ton/ha. Kandungan karbon pada serasah sebesar 8,19 ton/ha/hari dan serapan CO2 sebesar 30,02 ton/ha/hari. Global warming is marked by an increase in the earth's surface temperature due to the increasing concentration of greenhouse gases in the atmosphere such as CO2 and CH4 gases produced from the industrial sector, transportation activities, and agricultural and livestock activities. Mangrove ecosystems have important ecological functions for coastal areas as carbon sinks and stores in efforts to mitigate global warming. The coastal area in Tugurejo Village which has a mangove is the Tapak area. The mangrove area in the Tapak area reaches ± 3.00 Ha. So there is a need for research on the potential of mangroves as carbon sinks and stores. The purpose of this research is to determine the estimated CO2 savings and absorption in the village area of Tugurejo, Semarang. The method used in this research is the survey method. The survey method is direct observation and sampling in the field. Determination of the station using purposive sampling method. The results obtained were found 2 types of mangroves, namely Rhizopora mucronata and Avicennia marina. The carbon content in the mangrove stands was 399.06 ton C / ha. CO2 uptake in stands was 1463.22 ton/ha. The carbon content in the sediment was 760,908 tonC / ha. The absorption of CO2 in the sediment is 2789,996 ton/ha. The carbon content in the litter is 8.19 ton/ha/ day and CO2 absorption is 30.02 ton/ha/day.

oai:ojs.ejournal.undip.ac.id:article/63541 2026-02-11T04:49:13Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/63541 2026-02-11T04:49:13Z Buletin Oseanografi Marina Vol 14, No 2 (2025): Buletin Oseanografi Marina; 205-212 Friliana Rindyaneputri, Adella; Departemen Sumber Daya Akuatik, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Ayuningrum, Diah; Departemen Sumber Daya Akuatik, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Febrianto, Sigit; Departemen Sumber Daya Akuatik, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Rudolf Muskananfola, Max; Departemen Sumber Daya Akuatik, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2025-06-10 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/63541 Identifikasi Molekuler; Kecamatan Tugu; MEGA X; Pirenella alata; Telescopium telescopium id Ekosistem mangrove memiliki berbagai peranan ekologis, salah satunya adalah sebagai habitat organisme gastropoda. Gastropoda ekosistem mangrove berperan sebagai bioindikator dan dekomposer. Identifikasi spesies gastropoda secara molekuler di kawasan mangrove penting dilakukan untuk mengetahui spesies-spesies gastropoda yang ditemukan secara akurat. Penelitian ini bertujuan untuk mengidentifikasi spesies gastropoda dan tingkat kekerabatannya di Kawasan Mangrove Desa Tapak Kecamatan Tugu Kota Semarang yang dilaksanakan pada bulan September - November 2023. Metode yang digunakan dalam penelitian ini yaitu deskriptif-kuantitatif. Pengambilan sampel penelitian dilakukan dengan metode purposive sampling. Penanda genetik yang digunakan dalam penelitian ini adalah gen Cytochrome Oxydase I (COI) dengan penyejajaran sekuens DNA menggunakan metode MUSCLE. Analisis filogenetik berbasis algoritma neighbor joining (NJ) 1000 bootstrap pada software MEGA X. Hasil identifikasi molekuler diperoleh bahwa sampel GT1 memiliki kemiripan sebesar 96,12% (Percent Identity) dengan Pirenella alata dan sampel GT2 sebesar 99,69% (Percent Identity) dengan Telescopium telescopium. Hasil analisis filogenetik menunjukkan kladogram kedua spesies ini terdapat pada klade yang berbeda. Klade I terdiri dari sampel GT1 beserta 4 spesies pembanding lainnya dalam 1 genus, yaitu Pirenella alata, Cerithidea microptera, Pirenella nanhaiensis, dan Pirenella incisa. Klade II terdiri dari sampel GT2 beserta 4 spesies pembanding lainnya yaitu Telescopium telescopium, Varicinassa variciferus, Laevilitorina caliginosa, dan Monoplex krebsii.  Mangrove ecosystem has many ecological roles, one is as gastropods habitat. Mangrove ecosystems gastropods act as bioindicators and decomposers. Gastropods mangroves areas molecular identification is important to accurately the types of gastropod species. This research aims to identify gastropods species and the relationship levels in the Mangrove Area of Tapak Village, Tugu District, Semarang conducted from September − November 2023. This research using descriptive-quantitative method. Research sampling using purposive sampling method. The genetic marker used in this research is the Cytochrome Oxydase I (COI) gene with DNA sequence alignment MUSCLE method. Phylogenetic analysis based on the neighbor joining (NJ) 1000 bootstrap algorithm in MEGA X. The results of molecular identification showed that GT1 sample had a similarity of 96.12% (Percent Identity) to Pirenella alata and GT2 sample was 99.69% (Percent Identity) similar to Telescopium telescopium. The results of the phylogenetic of two species analysis show that the cladograms are in different clades. Clade I consist of sample GT1 along with 4 other comparison species in 1 genus, namely Pirenella alata, Cerithidea microptera, Pirenella nanhaiensis, and Pirenella incisa. Clade II consists of sample GT2 along with 4 other comparison species, namely Telescopium telescopium, Varicinassa variciferus, Laevilitorina caliginosa, and Monoplex krebsii.

oai:ojs.ejournal.undip.ac.id:article/16556 2020-04-17T12:04:36Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/16556 2020-04-17T12:04:36Z Buletin Oseanografi Marina Vol 6, No 2 (2017): Buletin Oseanografi Marina; 88-93 Supriyantini, Endang; Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Santosa, Gunawan Widi; Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Dermawan, Agus; Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2017-11-18 00:38:54 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/16556 carrageenan extract; Kappaphycus alvarezii; Pantai Kartini; Kemojan Karimunjawa. id Karaginan merupakan senyawa hidrokoloid yang diekstraksi dari rumput laut merah jenis Kappaphycus alvarezii. Karaginan dapat digunakan untuk meningkatkan kestabilan bahan pangan baik yang berbentuk suspensi (dispersi padatan dalam cairan), emulsi (dispersi gas dalam cairan). Tujuan dari penelitian ini adalah mengetahui Kualitas ekstrak karaginan hasil ekstraksi rumput laut K. alvarezii dari dua lokasi sampling yang berbeda. Penelitian ini dilaksanakan pada bulan Agustus 2015 sampai bulan Januari 2016, di perairan Pantai Kartini, Jepara dan peraian Kemojan Karimunjawa, Jepara. Hasil penelitian menunjukkan analisis spektra FTIR produk telah memenuhi spesifikasi karaginan standar karena gugus-gugus fungsi yang terdapat pada spektrum sampel yang dihasilkan sama seperti gugus pada kappa karaginan yaitu gugus ester sulfat, OH, ikatan glikosidik. Hasil analisis sifat fisik-kimia karaginan (rendemen, kadar air, kadar abu, kadar sulfat, viskositas, dan kekuatan gel) yang paling baik yaitu karaginan dari perairan Kemojan Karimunjawa dibandingkan karaginan Pantai Kartini. Kadar sulfat Pantai Kartini dan Kemojan Karimunjawa masih dibawah kadar mutu yaitu 15-40 %, Sedangkan kekuatan gel kedua perairan yaitu Kemojan Karimunjawa 78,57 g.cm-2 dan Pantai kartini 61,86 g.cm-2 masih jauh di bawah baku mutu yaitu 685,50 g.cm2. Carrageenan is a hydrocolloid compounds extracted from red seaweed types Kappaphycus alvarezii. Carrageenan can be used to improve the stability of food in the form of suspension or emulsions. The purpose of this study was to determine the quality of the extract of carrageenan extracted from K. alvarezii at two different sampling locations. This research was conducted in August, 2015 and January, 2016. Samples of seaweed obtained from two different waters, namely Kartini Beach and Kemojan Karimunjawa Island, bolt at jepara regency. The results showed the FTIR spectra analysis of the product met the specifications for a standard carrageenan functional groups contained in the sample spectrum as expressed in clusters of kappa carrageenan namely sulphate ester group , OH , glycosidic bond. The results of analysis  of the physical-chemical properties of carrageenan ( yield, moisture content , ash content , sulphate content , viscosity and gel strength ) the best quality of carragenan was obtained from carrageenophyte taken from Kemojan Karimunjawa Island, although sulphate content from two different waters was under quality level at 15 – 40%, while the  gel strength kartini 61.86 g.cm-2 and Kemojan 78.57 g.cm-2 both were still far below the of carrageenophyte quality at 685.50 g.cm-2.

oai:ojs.ejournal.undip.ac.id:article/42879 2023-01-25T06:05:53Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/42879 2023-01-25T06:05:53Z Buletin Oseanografi Marina Vol 11, No 3 (2022): Buletin Oseanografi Marina; 358-368 Ain, Rahmayani Kurnia; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Pribadi, Rudhi; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Ulumuddin, Yaya Ihya; Pusat Riset Oseanografi, Badan Riset dan Inovasi Nasional 2022-10-01 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/42879 Bentang Laut; Ikan Karang; Ekosistem Pesisir; Regresi Linier id Ikan karang selama hidupnya dapat mendiami satu habitat saja atau melakukan migrasi ke ekosistem di sekitarnya. Faktor tersebut membuat terjadinya interaksi antara ikan karang dengan ekosistem mangrove dan terumbu karang. Pendekatan bentang laut (seascape ecology) masih belum banyak dilakukan mengingat pendekatan ini penting untuk mengetahui kelimpahan ikan yang berada di sekitar area terumbu karang, sehingga dapat dijadikan sebagai pedoman dalam pengelolaan kawasan pesisir. Oleh karena itu penelitian ini bertujuan untuk mengetahui struktur bentang laut (seascape), interaksinya dengan ikan karang, dan menilai tingkat konektivitas dari keduanya di Raja Ampat dan Maluku Tenggara. Metode penelitian yang digunakan yaitu pengolahan dan analisis data spasial dan statistika menggunakan software QGIS 3.14 dan RStudio versi 2.0.4. Hasil penelitian dari analisis data statistika menggunakan analisis korelasi dan regresi diperoleh bahwa kelimpahan Ikan Lutjanidae pada Pulau Kei Kecil, Maluku Tenggara memiliki konektivitas dengan nilai regresi tertinggi yang dijelaskan oleh metrik Distance to Mangrove (DistM) dengan nilai koefisien korelasi sebesar -0,88; R2 0,7777; dan nilai AIC (Akaike Information Criterion) 18,01. Berdasarkan hasil penelitian, kesimpulan yang diperoleh adalah matriks Distance to Mangrove (DistM) menjadi matriks yang memiliki hubungan erat dengan Ikan Lutjanidae yang dapat mempengaruhi kelimpahan Ikan Lutjanidae di lokasi penelitian.   Reef fish, during their lifetime, can inhabit only one habitat or migrate to the surrounding ecosystem. These factors make the interaction between reef fish with mangrove ecosystems and coral reefs. However, the seascape ecology approach is still not widely used, considering that it is important to determine the abundance of fish around coral reef areas, so that it can be used as a guideline in the management of coastal areas. Therefore, this study aims to determine the structure of the seascape, its interaction with reef fish, and assess the level of connectivity of both in Raja Ampat and Southeast Maluku. The research method used is the processing and analysis of spatial and statistical data using software QGIS 3.14 and RStudio 2.0.4. The results of statistical data analysis using correlation and regression analysis showed that the abundance of Lutjanidae on Kei Kecil Island, Southeast Maluku had connectivity with the highest regression value described by the Distance to Mangrove (DistM) metric and has a correlation coefficient value of -0.88; R2 0.7777; and the AIC (Akaike Information Criterion) score of 18,01112. Based on the results of the study, the conclusion obtained is that the Distance to Mangrove (DistM) metric is a metric that has a close relationship with Lutjanidae fish which can affect the abundance of Lutjanidae fish in the research location.

oai:ojs.ejournal.undip.ac.id:article/6918 2014-05-20T03:47:15Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6918 2014-05-20T03:47:15Z Buletin Oseanografi Marina Vol 1, No 5 (2012): Buletin Oseanografi Marina; 63-74 Yusuf, Muhammad; Jurusan Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro Handoyo, Gentur; Jurusan Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro Muslim, Muslim; Jurusan Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro Wulandari, Sri Yulina; Jurusan Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro Setiyono, Heriyoso; Jurusan Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro 2012-10-10 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6918 en Perairan Kepulauan Karimunjawa memiliki karakteristik yang spesifik secara geografis maupun ekologis karena terletak di tengah lautan yang jauh dari daratan utama, dikelilingi oleh banyak pulau-pulau kecil dan hamparan terumbu karang, sehingga perairannya termasuk semi tertutup. Kondisi ini memberikan keuntungan karena menjadi daerah jebakan unsur hara. Arah dan pola sebaran spasial unsur hara (nitrat dan fosfat) dan Fitoplankton sangat dipengaruhi oleh bagaimana arah dan kecepatan arus yang terjadi serta tipe dan kondisi perairan yaitu semi tertutup. Tujuan penelitian ini adalah untuk menganalisis pola arus (arah dan kecepatan) dalam kaitannya dengan kondisi kualitas perairan terutama sebaran nitrat, fosfat, dan kelimpahan individu fitoplankton di perairan Kawasan Taman Nasional Karimunjawa. Hasil penelitian menunjukkan bahwa arah arus dari hasil model adalah dominan menuju ke arah Barat, dan hasil ini sesuai dengan arah arus dari pengukuran secara in-situ di stasiun-stasiun yang diteliti. Kecepatan arus maksimal untuk permukaan laut termasuk kategori sedang, yaitu sebesar 0,309 m/detik dengan kecepatan rata-rata 0,055 m/detik. Dilihat dari arah sebaran paramater kualitas air terutama nitrat dan fosfat menunjukkan bahwa konsentrasi yang relatif lebih besar berada di pulau-pulau yang terletak di sebalah Barat, seperti P. Parang dan P. Nyamuk (nitrat), dan P. Nyamuk untuk unsur fosfat. Kelimpahan fitoplankton yang tinggi juga terdapat di pulau-pulau yang lokasinya terletak di sebalah Barat seperti pulau Parang (sisi Timur dan Selatan), dan pulau Nyamuk (semua sisi). Ada kecenderungan bahwa arah sebaran parameter kualitas air yang memiliki konsentrasi lebih tinggi terutama suhu, pH, oksigen terlarut, dan nitrat ternyata mengikuti arah sebaran arus yang tejadi.   Kata Kunci: Pola Arus, Kualitas Perairan, Fitoplankton, Karimunjawa.

oai:ojs.ejournal.undip.ac.id:article/78299 2026-02-11T04:57:56Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/78299 2026-02-11T04:57:56Z Buletin Oseanografi Marina Vol 15, No 1 (2026): Buletin Oseanografi Marina; 33-44 Dharma, Candrasa Surya; Pusat Hidro-Oseanografi TNI Angkatan Laut Sekolah Staf dan Komando TNI Angkatan Laut Yudhono, Albert Mahendro; Pusat Hidro-Oseanografi TNI Angkatan Laut Asrof, Muhammad; Sekolah Staf dan Komando TNI Angkatan Laut Kristiyono, Kristiyono; Sekolah Staf dan Komando TNI Angkatan Laut Suprayitno, Suprayitno; Sekolah Staf dan Komando TNI Angkatan Laut Karadona, Karadona; Sekolah Staf dan Komando TNI Angkatan Laut Kelvin, Filan Muhammad; Program Studi Oseanografi, Fakultas Ilmu dan Teknologi Kebumian, Institut Teknologi Bandung Arochim, Arochim; Pusat Hidro-Oseanografi TNI Angkatan Laut Azmi, Parikesit Nuril; Program Studi Oseanografi, Fakultas Ilmu dan Teknologi Kebumian, Institut Teknologi Bandung Kartadikaria, Aditya Rakhmad; Kelompok Keahlian Oseanografi Lingkungan dan Terapan, Fakultas Ilmu dan Teknologi Kebumian, Institut Teknologi Bandung 2026-02-25 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/78299 Permukaan Laut; Arus Laut; S-104; S-111; Prediksi; ECDIS id Penelitian ini menyajikan hasil konversi dari simulasi model hidrodinamika beresolusi tinggi ke dalam format S-111 untuk mendukung keselamatan bernavigasi di Benoa Bali. Perangkat lunak Mike 21/3 yang divalidasi dengan data pasang surut, observasi Pushidrosal digunakan sebagai data masukan bagi S-111. Dinamika pelabuhan sangat dipengaruhi oleh pasang surut, sehingga pemahaman terhadap variasi pasang surut dalam bentuk data navigasi berformat S-111 sangat krusial bagi operasi sandar yang aman di dalam pelabuhan. Studi ini berfokus pada kondisi pasang surut tanggal 21 Februari 2025, saat berlangsungnya proses sandar tiga kapal pesiar besar. Penelitian ini menekankan pentingnya akurasi prediksi pasang surut agar dapat menyajikan representasi aliran arus laut permukaan beresolusi tinggi. Studi ini juga membahas integrasi data dalam kerangka S-100, standar internasional terbaru untuk data hidrografi. Secara khusus dipaparkan konversi data simulasi yang sukses dirubah menjadi format S-104 (informasi muka air) dan S-111 (arus permukaan). Konversi ini memastikan kompatibilitas data dengan sistem tampilan dan informasi peta elektronik modern KHOA Viewer dan ECPINS, sehingga dapat meningkatkan keselamatan dan efisiensi navigasi di Pelabuhan Benoa. Secara umum, tipe pasang surut di Pelabuhan Benoa adalah campuran semidiurnal, rentang pasang surut 280 cm dari chart datum, arus pasang ke barat laut sebesar 0,62 m/s, arus surut ke tenggara sebesar 0,52 m/s. Hasil model beresolusi tinggi dengan teknik bersarang untuk mendukung format S-104 dan S-111 merupakan temuan utama, dengan hasil RMSE antara TPXO dan Mike 21/3 terhadap observasi Pushidrosal adalah 0,148 dan 0,135, MAE 0,123, dan 0,114, serta skill 0,986 untuk kedua model tersebut.   This research presents the conversion results from the simulations of high-resolution hydrodynamic models into S-111 format, to support the safety of navigation in Benoa Bali. MIKE 21/3D hydrodynamic model validated against observational data from Pushidrosal was used as the input for S-111.  The dynamics of the port is greatly influenced by tides, therefore, it crucial to understand tidal variations in S-111 format, for berthing operations within the port. This study focuses on the tidal conditions on February 21, 2025, during the berthing operations of three large cruise ships. This research emphasizes the importance of accurate tidal predictions to provide high-resolution representations of surface ocean currents. The study also discusses the integration of data within the S-100 framework, the latest international standard currently adopted for hydrographic data. In particular, the successful conversion of the simulation data into S-104 (water level information) and S-111 (surface current) formats is described. This conversion ensures data compatibility with modern electronic chart display and information systems such as KHOA Viewer and ECPINS, thereby enhancing navigation safety in Benoa Port. In general, the tidal regime in Benoa Port is classified as mixed semidiurnal, with a tidal range of 280 cm from chart datum, a northwestward flood current of 0.62 m/s, and a southeastward ebb current of 0.52 m/s. The use of high-resolution nested modeling to support S-104 and S-111 formats is a key finding, with RMSE values between TPXO and the Mike 21/3 model against Pushidrosal observations being 0.148 and 0.135, MAE of 0.123 and 0.114, and skill score of 0.986 for both models, respectively.

oai:ojs.ejournal.undip.ac.id:article/24965 2020-04-17T12:08:30Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/24965 2020-04-17T12:08:30Z Buletin Oseanografi Marina Vol 8, No 2 (2019): Buletin Oseanografi Marina; 81-86 Fadilla, Winda Ariesta Nur; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Soenardjo, Nirwani; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Setyati, Wilis Ari; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2019-10-04 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/24965 Daun; Herbivori; Mangrove; Dominan id Hutan mangrove memiliki fungsi ekologi sebagai daerah pemijahan, daerah asuhan dan daerah mencari makan. Fauna yang tinggal di hutan mangrove akan menciptakan simbiosis antara flora dan fauna mangrove, misalnya aktivitas herbivori daun. Herbivori daun mangrove dipengaruhi oleh beberapa faktor seperti spesies tanaman, tinggi tanaman dan umur daun. Penelitian ini bertujuan untuk mengetahui tingkat herbivori daun mangrove Rhizophora stylosa dan Avicennia marina berdasarkan tinggi tanaman dan umur daun pada ekosistem mangrove di Desa Pasar Banggi, Rembang, Jawa Tengah. Metode penelitian yang digunakan dalam penelitian ini adalah metode deskriptif. Metode pengambilan data yang digunakan adalah metode survei dan penentuan lokasi penelitian menggunakan metode purposive. Sampel daun diambil dari 2 spesies mangrove dominan pada ekosistem Desa Pasar Banggi yaitu Rhizophora stylosa dan Avicennia marina. Daun diambil dari 3 kategori tinggi tanaman yaitu <1 m, 1-< 3 m dan 3–5 m, masing-masing diambil 10 pohon sebagai ulangan. Daun diambil sebanyak 10 %, dipisahkan berdasarkan umur daun (muda dan tua) dan kondisi daun (utuh dan rusak). Sampel daun diolah menggunakan software ImageJ dan Measure Picture. Hasil penelitian menunjukkan rata-rata tingkat herbivori tertinggi pada daun muda Rhizophora stylosa pada tanaman dengan tinggi 3–5 m dan tertinggi pada daun tua Rhizophora stylosa pada tanaman dengan tinggi 1–< 3 m, sedangkan  rata-rata tingkat herbivori tertinggi pada daun muda Avicennia marina pada tanaman dengan tinggi 1–< 3 m dan tertinggi pada daun tua Avicennia marina pada tanaman dengan tinggi 1–< 3 m. Mangrove forests have ecological functions a spawning ground, nursery ground and feeding ground. Fauna living in mangrove forests will create a symbiosis between mangrove flora and fauna, for example herbivory leaf activity. Herbivory of mangrove leaves is influenced by several factors such as plant species, plant height and leaf age. This study aims to determine the herbivory level of mangrove Rhizophora stylosa and Avicennia marina leaves based on plant height and leaf age in the mangrove ecosystem in Pasar Banggi Village, Rembang, Central Java. The research method used in this study was descriptive. The data collection method used in this study is the survey method and the determination of the location of the study using a purposive method. Leaf samples were taken from 2 dominant mangrove species in the Pasar Banggi Village ecosystem, Rhizophora stylosa and Avicennia marina. The leaves are taken from 3 plant height categories, namely <1 m, 1-<3 m and 3-5 m, each of which is taken as 10 replicates. The leaves are taken as much as 10%, then separated according to the age of the leaves (young or old) and the condition of the leaves (whole or damaged). Leaf samples were processed using ImageJ and Measure Picture software. The results showed the highest average herbivory level in young leaves of Rhizophora stylosa at plant height 3-5 m (10.11%) and highest on old leaves of Rhizophora stylosa at plant height 1-<3 m (10.67%), while the highest average herbivory level in Avicennia marina young leaves at plant height 1-<3 m (12.54%) and the highest on the old leaves of Avicennia marina at plant height 1-<3 m (11.73%).

oai:ojs.ejournal.undip.ac.id:article/51440 2023-06-23T22:50:01Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/51440 2023-06-23T22:50:01Z Buletin Oseanografi Marina Vol 12, No 2 (2023): Buletin Oseanografi Marina; 305-312 Maslukah, Lilik; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Zainuri, Muhammad; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Wirasatriya, Anindya; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Widjaya, Kevifa Satria; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Prasetyawan, Indra Budi; Center for Coastal and Ocean Mapping/Joint Hydrographic Center, University of New Hampshire Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro|Indonesia 2023-06-20 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/51440 Klorofil-a; Particulate Organic Carbon; BKT Semarang id Muara sungai berperan sebagai agen transfer dan penyimpanan bahan organik sebagai bagian proses ketersediaan zat hara di perairan. Sungai Banjir Kanal Timur merupakan salah satu sungai di Kota Semarang yang melintasi daerah padat pemukiman dan aktivitas industri sehingga memiliki kondisi dinamis akibat inputan limbah dari hasil aktivitas manusia. Penelitian ini bertujuan untuk mengetahui konsentrasi Particulate Organik Carbon (POC) dan konsentrasi klorofil-a serta menentukan jumlah karbon yang terkandung dalam fitoplankton sebagai hasil sekuestrasi karbon di daerah muara sungai. Analisis klorofil-a dilakukan dengan metode spektrofotometri dan analisis POC dilakukan dengan metode LOI (loss of ignition) pada sampel MPT. Nilai klorofil-a hasil pengukuran lapangan berkisar antara 2,15 –20,44 μg/L dan POC berkisar 0,0273–0,1894 μg/L. Hasil penelitian menunjukkan bahwa sekuestrasi karbon terjadi melalui proses fotosintesis oleh fitoplankton dan berjalan maksimal di daerah dekat muara (pantai). Konsentrasi klorofil-a yang tinggi menunjukkan tingginya biomassa fitoplankton yang sekaligus menjelaskan banyaknya carbon yang terserap. Estuaries act as agents for the transfer and storage of organic matter as part of the nutrient availability process in the waters. The Banjir Kanal Timur (BKT) Estuary is a waters and river mouth that crosses dense residential areas and industrial activities so that it has dynamic water conditions as a result of waste resulting from human activities. This study aimed to determine the concentration of Particulate Organik Carbon (POC) and the concentration of chlorophyll-a and to determine the amount of carbon contained in phytoplankton as a result of carbon sequestration in the estuary area of the river. Chlorophyll-a analysis was carried out by spectrophotometric method and POC analysis was carried out by LOI (loss of weight on ignition) method on MPT samples. The chlorophyll-a values from field measurements ranged from 2.1456 – 20.6424 μg/L and the POC ranged from 0.0273 – 0.1894 μg/L. The results showed that carbon sequestration occurs through the process of photosynthesis by phytoplankton and runs optimally in areas near estuaries (beaches). A high concentration of chlorophyll-a indicates a high phytoplankton biomass which also explains the amount of carbon absorbed.

oai:ojs.ejournal.undip.ac.id:article/29067 2021-02-01T08:06:03Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/29067 2021-02-01T08:06:03Z Buletin Oseanografi Marina Vol 9, No 2 (2020): Buletin Oseanografi Marina; 117-124 Suryono, Suryono; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Taufiq-SPJ, Nur; Departemen Ilmu Kelautan, Fakultas Perikanan Dan Ilmu Kelautan, Universitas Diponegoro Pratikto, Ibnu; Departemen Ilmu Kelautan, Fakultas Perikanan Dan Ilmu Kelautan, Universitas Diponegoro Ario, Raden; Departemen Ilmu Kelautan, Fakultas Perikanan Dan Ilmu Kelautan, Universitas Diponegoro 2020-10-15 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/29067 Identifikasi; sumberdaya; overlay; investigasi; kerapatan; replant id Kabupaten Jepara memiliki potensi wilayah pesisir dengan panjang garis pantai 81,6 km. Mangrove sebagai sabuk pantai hijau memiliki sebaran di setiap kecamatan pesisir. Salah satu lokasi sebaran mangrove di pesisir Jepara berada di desa Bumiharjo Kecamatan Keling. Identifikasi potensi luasan lahan serta sebaran mangrove adalah salah upaya mengetahui potensi sumberdaya pesisir. Metode penelitian yang digunakan adalah overlay peta RBI dan peta satelit landsat 8 guna mengetahui lokasi serta luasan sebaran mangrove di lokasi penelitian.Selanjutnya dilakukan investigasi ekologi mangrove dengan Survei Lapang guna mengetahui distribusi dan kelimpahan mangrove. Hasil penelitian menunjukan bahwa hutan mangrove dilokasi penelitian adalah seluas 4,75 Ha. Hasil identifikasi komposisi jenis mangrove ditemukan sebanyak 6 spesies mangrove yaitu: Avicennia marina, Rhizophora apiculata, Rhizophora stylosa, Rhizophora mucronata, Soneratia alba, serta Soneratia muconata. Kerapatan rata-rata vegetasi mangrove berkisar antara 4000 – 10.000 individu/ha. Tegakan mangrove memiliki tinggi batang 5-6 meter, diameter batang berkisara antara 4,3- 5,0 cm. Kerapatan mangrove didominasi oleh Rhizophora mucronata. dengan kerapatan paling dominan adalah semai (Sapling). Hal ini menunjukan bahwa mangrove yang ada di desa Bumiharjo Kecamatan Keling kabupaten Jepara adalah dominan mangrove hasil replant. Jepara Regency has a potential coastal area with a coastline length of 81.6 km. Mangroves as coastal green belts have distribution in each coastal district. One of the mangrove distribution locations on the coast of Jepara is in the village of Bumiharjo, Keling district. Identification of the potential land area and the distribution of mangroves is an effort to determine the potential of coastal resources. The research method used is an overlay RBI map and satellite map Landsat 8 to determine the location and extent of the distribution of mangroves in research locations. Subsequently carried out an investigation of mangrove ecology with a Field Survey (Ground Truth) to determine the distribution and abundance of mangroves. The results showed that the mangrove forest in the study area was 4.75 Ha. The results of the identification of the composition of mangrove species were found as many as 6 species of mangroves, namely: Avicennia marina, Rhizophora apiculata, Rhizophora stylosa, Rhizophora mucronata, Soneratia alba, and Soneratia muconata. the average density of mangrove vegetation ranges between 4000 - 10,000 individuals/ha. Mangrove stand has a stem height of 5-6 meters. the diameter of the stem is between 4.3 - 5.0 cm. Mangrove density is dominated by Rizophora mucronata. with the most dominant density is the seedling (Sapling). This shows that the mangroves on the coast of the Jepara district are replanted mangrove species. (rehabilitation).

oai:ojs.ejournal.undip.ac.id:article/61977 2024-05-31T07:50:39Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/61977 2024-05-31T07:50:39Z Buletin Oseanografi Marina Vol 13, No 1 (2024): Buletin Oseanografi Marina; 136-140 Suprijanto, Jusup; Department of Marine Science, Faculty of Fisheries and Marine Science, Universitas Diponegoro Widowati, Ita; Department of Marine Science, Faculty of Fisheries and Marine Science, Universitas Diponegoro 2024-02-06 14:08:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/61977 Amusium pleuronectes; by-product; calcium; Paphia undulata, Tegillarca granosa; zero waste management en  Shellfish are also known as by-products, namely production results that are not utilized or not consumed, where the value of this by-product can be increased/added through a process known as Reduce-Reuse and Recycle (3R). This research aims to determine the potential of shellfish as a source of calcium. Samples of clams (Paphia undulata), blood clams (Tegillarca granosa), and Asian Moon Scallop (Amusium pleuronectes) were obtained from Tambak Lorok Fish Auction Place, Semarang; then taken to the Marine Biology Laboratory, Faculty of Fisheries and Marine Sciences, Universitas Diponegoro to have the shells, and air dry until dry after drying the shell. Calcium and mineral content were analyzed using the XRF method at the Integrated Laboratory, Universitas Diponegoro. The results of the study showed that the calcium (CaO) content of the three shellfish was the lowest in the clam (P. undulata) at 45.79%, then the Asian moon Scallop (A. pleuronectes) at 45.89%, and the highest in the blood cockle T. granosa namely 92.41%.  It can be concluded that the shells of clams, blood clams, and Asian Moon Scallops contain high levels of calcium and minerals, which have the potential to be used as an additional ingredient in concrete/paving blocks and fish feed.

oai:ojs.ejournal.undip.ac.id:article/11212 2020-04-17T17:17:57Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/11212 2020-04-17T17:17:57Z Buletin Oseanografi Marina Vol 3, No 1 (2014): Buletin Oseanografi Marina; 1-8 Syahputra, Hendry; Fakultas Perikanan dan Ilmu Kelautan UNDIP Prasetyawan, Indra Budi; Fakultas Perikanan dan Ilmu Kelautan UNDIP Ismunarti, Dwi Haryo; Fakultas Perikanan dan Ilmu Kelautan UNDIP Adhitya, R Bambang; Pusat Pengkajian dan Perekayasaan Teknologi Kelautan dan Perikanan, Badan Penelitian dan Pengembangan Kelautan dan Perikanan, Jakarta 2014-01-03 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/11212 en Maraknya pemberitaan mengenai inovasi sumber energi terbarukan yang berasal dari laut berdampak terhadap banyaknya hasil studi yang mulai mengarah pada pengoptimalan energi non-konvensional dari laut. Tujuan Penelitian ini adalah untuk mengetahui lokasi potensi dari Perairan Selat Larantuka, besar daya rata – rata yang dihasilkan setiap musimnya selama 1 tahun dan probabilitas energi dari arus laut setiap musimnya. Penelitian ini menggunakan metode deskriptif kuantitatif dan penetuan lokasi dengan purposive sample. Penelitian ini dibagi dalam dua tahap besar yaitu tahap survey lapangan dan tahap pemodelan numerik dengan MIKE 21 flow model, flexible mesh serta dilanjutkan dengan perhitungan potensi energi arus laut. Berdasarkan hasil didapatkan Lokasi potensi yang ditentukan adalah pada -8o 18’ 06.9” 123o01’20.1” dengan probabilitas potensi pada musim  timur sebesar 94.85%, pada musim peralihan II sebesar 95.73%, pada musim barat sebesar 96.84% dan pada musim peralihan I sebesar 96.77%. Kata kunci: probabilitas potensi, energi non-konvensional, Selat Larantuka

oai:ojs.ejournal.undip.ac.id:article/38293 2021-09-19T19:04:11Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/38293 2021-09-19T19:04:11Z Buletin Oseanografi Marina Vol 10, No 3 (2021): Buletin Oseanografi Marina; 259-268 Milasari, Ayuk; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Ismunarti, Dwi Haryo; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Indrayanti, Elis; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Muldiyatno, Farid; Primer Koperasi Angkatan Laut (Primkopal), Pusat Hidrografi dan Oseanografi TNI Angkatan Laut Ismanto, Aris; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Rifai, Aziz; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2021-09-20 02:02:11 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/38293 Pola Arus; Pasang Surut; Teluk Lampung; Hidrodinamika 2D id Lokasi geografis Teluk Lampung yang terletak di Pulau Sumatra bagian Selatan dan dipisahkan dari Pulau Jawa melalui Selat Sunda mempunyai akses langsung dengan perairan lepas dari Samudera Hindia. Hal ini akan berpengaruh terhadap pola sirkulasi arus permukaan yang terbentuk. Penelitian ini bertujuan untuk memodelkan arus permukaan di Teluk Lampung dengan menggunakan pendekatan model hidrodinamika khususnya pada musim peralihan II (Oktober – November 2020). Verifikasi model dilakukan dengan cara membandingkan hasil model arus dengan hasil pengukuran arus lapangan menggunakan currentmeter valeport yang dilaksanakan dari tanggal 12 Oktober sampai 9 November 2020. Hasil penelitian menunjukkan bahwa arus permukaan dominan dibangkitkan oleh pasang surut dengan prosentase arus pasang surut sebesar 89,09 %. Tipe pasang surut adalah tipe campuran condong harian ganda dengan nilai Formzahl 0,4. Kecepatan arus maksimum 0,168 m/s ke arah 352° dan arus minimum 0,017 ke arah 33°, sehingga arah pergerakan cenderung bolak balik. Pada kondisi pasang, arus bergerak ke utara yaitu dari Selat Sunda masuk ke perairan Teluk Lampung, dan sebaliknya pada saat surut arus bergerak ke arah selatan keluar dari perairan Teluk Lampung menuju Selat Sunda. The geographical location of Lampung Bay, which is located in the southern part of Sumatra Island and separated from Java Island by the Sunda Strait, has direct access to the waters off the Indian Ocean. This will affect the surface current circulation pattern that is formed. This research aims to model surface currents in Lampung Bay using a hydrodynamic model approach, especially in 2nd transitional monsoon (October - November 2020). Model verification is carried out by comparing the results of the current model with the results of field current measurements using a valeport current meter which was carried out from 12 October to 9 November 2020. The results showed that the dominant surface current was generated by tides with a tidal current percentage of 89.09%. The tidal type is a mixed type of mixed tide prevailing semidiurnal with a Formzahl value of 0.4. The maximum current speed is 0.168 m/s in the direction of 352° and the minimum current is 0.017 in the direction of 33°, so that the direction of movement tends to be back and forth. At high tide, the current moves northward from the Sunda Strait into the waters of Lampung Bay, and vice versa at low tide the current moves southward out of the waters of the Lampung Bay towards the Sunda Strait.

oai:ojs.ejournal.undip.ac.id:article/53092 2026-02-11T04:53:31Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/53092 2026-02-11T04:53:31Z Buletin Oseanografi Marina Vol 14, No 1 (2025): Buletin Oseanografi Marina; 13-24 Sujarta, Puguh; Program Magister Biologi, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Cendrawasih Ohee, Henderite Loisa; Departemen Biologi, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Cendrawasih Zainuri, Muhammad; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Misbach, Imam; Jurusan Ilmu Kelautan dan Perikanan, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Cenderawasih Ramandey, Euniche R.P.F.; Departemen Biologi, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Cendrawasih 2025-02-20 05:07:24 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/53092 Pupuk Organik Cair Limbah Ikan Cakalang; Chlorella sp.,; Klorofil id Pupuk pro analitik (PA) biasanya digunakan budidaya Chlorella sp., tetapi mahalnya harga pupuk PA sehingga diperlukan alternatif pupuk yang bisa penuhi kebutuhan nutrisi Chlorella sp. Inovasi pupuk alternatif ini memiliki prospek dalam pengganti pupuk PA yang mahal dipasaran dengan pemanfaatan limbah ikan yang diperoleh dari pasar hamadi, Jayapura. Pupuk yang digunakan merupakan pupuk organik yang diambil dari limbah ikan cakalang. Umumnya penjualan ikan dipasar bermacam-macam ikan, namun mayoritas ikan yang dijual di pasar hamadi adalah ikan cakalang. Tujuan dari riset ini merupakan menganalisis pengaruh pupuk organik cair dari limbah cakalang terhadap laju perkembangan, biomassa, serta klorofil a Chlorella sp. Tata cara yang digunakan dalam riset ini merupakan tata cara Rancangan Acak Kelompok (RAK) dengan memakai 2 perlakuan dengan masing masing 3 ulangan. Perlakuan yang diberikan pada riset ini merupakan pupuk organik cakalang dengan dosis 1 ml/ l serta kontrol (1 ml/ l Guillard). Parameter utama yang diamati merupakan pertumbuhan Chlorella sp., serta klorofil a. Bersumber pada hasil pertumbuhan dari aplikasi pupuk organik cair dari limbah ikan cakalang dengan pupuk kontrol (Guillard) diperoleh hasil tertinggi pada control dan pupuk ikan sebesar 12 x 108 dan 11.15 x 108 sel/mL. Sedangkan pada hasil klorofil diperoleh bahwa untuk control sebesar 1.85 mg/L serta hasil pupuk ikan 1.62 mg/L Hasil menunjukkan bahwa limbah pupuk ikan cakalang berpotensi dijadikan pupuk komersial guna meningkatkan pertumbuhan mikroalga Chlorella sp. 

oai:ojs.ejournal.undip.ac.id:article/15739 2020-04-17T12:03:40Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/15739 2020-04-17T12:03:40Z Buletin Oseanografi Marina Vol 6, No 1 (2017): Buletin Oseanografi Marina; 29-38 Supriyantini, Endang; Departemen Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Nuraini, Ria Azizah Tri; Departemen Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Fadmawati, Anindya Putri; Departemen Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2017-08-28 16:35:23 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/15739 Bahan Organik; BOD; COD; TSS; TDS; TOM; Ekosistem Mangrove id Bahan organik adalah kumpulan senyawa - senyawa organik kompleks yang telah mengalami proses dekomposisi oleh organisme pengurai, baik berupa humus hasil humifikasi maupun senyawa-senyawa anorganik hasil mineralisasi. Bahan organik merupakan sumber nutrient yang penting, yang sangat dibutuhkan oleh organisme laut. Penelitian ini bertujuan untuk menganalisis parameter kandungan bahan organik meliputi BOD5 (Biochemical Oxygen Demand), COD (Chemical Oxygen Demand), TSS (Total Suspended Solid), TDS (Total Suspended Solid) dan TOM (Total Organic Matter) dan menentukan tingkat pencemaran bahan organik berdasarkan baku mutu pada beberapa muara sungai di kawasan ekosistem mangrove, di wilayah pesisir pantai Utara Kota Semarang. Penelitian ini dilaksanakan pada bulan April 2015. Metode yang digunakan dalam penelitian ini adalah metode deskriptif, sedangkan penentuan lokasi penelitian menggunakan metode purposive sampling method dan untuk pengambilan sampel air menggunakan metode sample survey method. Hasil penelitian menunjukan bahwa kandungan parameter bahan organik selama penelitian di semua lokasi adalah BOD (3,77 – 15,13 mg/L), COD (20,33 – 140,67 mg/L), TSS (1,33 – 13,67 mg/L), TDS (818,33 – > 2.000 mg/L) dan TOM (10,73 – 50 mg/L). Secara umum kandungan COD dan TSS di Maron dan Trimulyo sudah melewati ambang batas baku mutu menurut Keputusan Menteri Negara Kependudukan dan Lingkungan Hidup Nomor 2 Tahun 1988 tentang Baku Mutu Air Limbah, sedangkan untuk kandungan BOD, TSS dan TOM belum melampaui ambang batas baku mutu yang telah ditetapkan oleh Keputusan Menteri Negara Lingkungan Hidup Nomor 51 Tahun 2004. The organic material is set of complex organic compounds that have developed in decomposition process by decomposing organisms, both in the form of topsoil of humification as well as inorganic compounds of mineralization. Organic materials are an important source of nutrients, which are needed by aquatic organisms. This study aimed to analyze the organic material content BOD5 (Biochemical Oxygen Demand), COD (Chemical Oxygen Demand), TSS (Total Suspended Solid), TDS (Total Suspended Solid) and TOM (Total Organic Matter) and determine the level of pollution of organic materials based on quality standard on some estuaries of the mangrove ecosystem, in North Coast of Semarang. This study carried out in April 2015. A method used in this research is descriptive method, whereas the determination of research location used purposive sampling method and the method intake of the water sample used the sample survey method. The results showed that the content of organic material parameters during the research in all locations are BOD (3.77 to 15.13 mg/L), COD (20.33 to 140.67 mg/L), TSS (1.33 - 13, 67 mg/L), TDS (818.33 - > 2.000 mg/L) and TOM (10.73 – 50 mg/L). In general the content of COD at Maron and Trimulyo, and TDS content Mangkang Wetan, Maron and Trimulyo are already passed the quality standard according to the Decree of the Minister of State for Population and the Environment No. 2 of 1988 on Wastewater quality standard, whereas for the content of BOD, TSS and TOM has not exceeded the limit of quality standards which are established by the Decree of the Minister of State for Population and the Environment No. 51 of 2004.

oai:ojs.ejournal.undip.ac.id:article/41323 2023-01-25T06:05:53Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/41323 2023-01-25T06:05:53Z Buletin Oseanografi Marina Vol 11, No 3 (2022): Buletin Oseanografi Marina; 231-247 Fahlevi, Moch. Reza; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Bayhaqi, Ahmad; Pusat Penelitian Oseanografi, Lembaga Ilmu Pengetahuan Indonesia Sugianto, Denny Nugroho; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Fadli, Muhammad; Pusat Penelitian Laut Dalam, Lembaga Ilmu Pengetahuan Indonesia Wang, Huiwu; First Institute of Oceanography, Ministry of Natural Resources People Republic of China Susanto, R. Dwi; Department of Atmospheric and Oceanic Science, University of Maryland Wouthuyzen, Sam; Pusat Penelitian Oseanografi, Lembaga Ilmu Pengetahuan Indonesia 2022-10-01 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/41323 Suhu; Salinitas; Densitas; Selat Sunda id Selat Sunda merupakan selat dengan kondisi fisik dinamis yang menjadi menjadi jalur sirkulasi massa air di perairan Indonesia petemuan Armondo dan Arlindo. Perairan ini didominasi dari Samudera Hindia dengan dinamika perairan yang sebagian besar dipengaruhi oleh angin musim, hal ini dapat memicu percampuran massa air. Penelitian ini bertujuan untuk mengetahui karakteristik massa air di Selat Sunda dan perairan lepasnya. Pengambilan data dilakukan pada bulan November 2019 dan data model diperoleh dari situs CMEMS (2015-2019). Pengolahan data menggunakan software Ocean Data View (ODV) dengan metode sebaran vertikal, melintang dan diagram TS. Hasil penelitian menunjukkan temperatur di Selat Sunda relatif lebih tinggi dengan kisaran 29-30,2oC. Sebaran salinitas dan densitas di Samudera Hindia lebih tinggi dengan nilai masing-masing 35-35,2 ‰dan 22,20 kg/m3. Tipe massa air didominasi dari Samudera Hindia terdiri dari Bengal Bay Water (BBW), South Indian Central Water (SICW), Antartic Intermediate Water (AAIW) dan Indonesian Upper Water (IUW). Dua jenis massa air berasal dari Samudera Pasifik yakni Pacific Equatoral Water (PEW) dan Western North Pacific Central Water (WNPCW). Variabilitas massa air menunjukkan pola yang relatif serupa. Sebaran temperatur tertinggi terjadi pada musim peralihan 2 (30,2oC) dan terendah di musim timur (29,2oC). Sebaran salinitas permukaan tertinggi terjadi pada musim peralihan 2 (32,87‰) dan terendah pada musim peralihan 1 (31,74‰).  Sunda Strait is a strait with dynamic physical condition that crossed by Armondo and Arlindo. These waters are dominated by Indian Ocean with dynamics of waters which are largely influenced by monsoons, its condition give an example of mixing water mass. This research aims to determine characteristics and variability of water mass. This study was carried out in November 2019 and satellite data was obtained from CMEMS website (2015-2019). Processing data was performed using software Ocean Data View (ODV) by methods scatter distribution, cross section and TS diagram. The result show that temperature in the Sunda Strait was relatively higher with a range 29-30.2oC. The distribution of salinity and density in the Indian Ocean is higher with values of 35-35.2 o/oo and 22.2 kg/m3. TS diagram shows that water mass dominated by the Indian Ocean consists of Bengal Bay Water (BBW), South Indian Central Water (SICW), Antartic Intermediate Water (AAIW) and Indonesian Upper Water (IUW). Two type of water mass from Pacific Ocean are Pacific Equatorial Water (PEW) and Western North Pacific Central Water (WNPCW). Variability of water mass shows a similar pattern. The highest temperature distribution occurred in transitional season 2 (30.2oC) and the lowest in east season (29.2oC). The highest distribution of salinity occurred in transitional season 2 (32.87 o/oo) and the lowest in transitional season 1 (31.74 o/oo).

oai:ojs.ejournal.undip.ac.id:article/6909 2014-05-20T02:34:22Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6909 2014-05-20T02:34:22Z Buletin Oseanografi Marina Vol 1, No 5 (2012): Buletin Oseanografi Marina; 1-9 Yuliasari, Dwi; Jurusan Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Zainuri, Muhammad; Jurusan Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Sugianto, Denny Nugroho; Jurusan Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2012-10-10 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6909 en Arus merupakan parameter penting dalam proses pengangkutan pasir dari mulut teluk menuju wilayah hulunya, kolam pelabuhan dan estuaria. Arus di Pantai Marina, Ancol memperlihatkan pola yang kompleks dan lebih banyak dipengaruhi oleh angin, meskipun bangunan dan reklamasi pantai juga turut mempengaruhi. Secara keseluruhan terbentuknya arus di Pantai Marina, Ancol merupakan resultan dari beberapa jenis arus seperti arus yang dibangkitkan oleh pasang surut, angin dan arus sejajar pantai. Pemisahan arus menggunakan software World Current 1.03 didapatkan hasil kecepatan arus total = 2,67 m/det, arus pasut = 0,41 m/det, dan arus residu = 2,64 m/det. Hubungan antara fluktuasi arah dan kecepatan arus dengan pola pasang surut yang terjadi dapat ditunjukkan dengan pendekatan model menggunakan software SMS versi 8.0 dan 8.1. Hubungan ini dapat dilihat dengan adanya pergerakan arah arus yang cenderung bolak-balik, yaitu  pada saat kondisi pasang arah arus cenderung ke arah Timur Laut – Barat dan pada saat surut arah arus ke arah Barat –Timur laut dengan kecepatan arus 0,004 m/det – 0,13 m/det. Hasil simulasi model pola arus untuk rencana reklamasi pantai menunjukan tidak adanya perubahan pola arus yang signifikan dibandingkan dengan pola arus di pantai Marina, Ancol sebelum reklamasi pantai, maka dapat disimpulkan bahwa dengan adanya rencana reklamasi pantai di Ancol, tidak berpengaruh terhadap pola arus di pantai Marina, Ancol.   Kata Kunci : Arus, Pasang Surut, Pantai Marina, Ancol, Reklamasi

oai:ojs.ejournal.undip.ac.id:article/70254 2025-10-24T20:42:39Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/70254 2025-10-24T20:42:39Z Buletin Oseanografi Marina Vol 14, No 3 (2025): Buletin Oseanografi Marina; 438-448 Habibie, Sitty Ainsyah; Program Studi Manajemen Sumber Daya Perairan, Fakultas Kelautan dan Teknologi Perikanan, Universitas Negeri Gorontalo Hamzah, Sri Nuryatin; Program Studi Ilmu Kelautan, Fakultas Kelautan dan Teknologi Perikanan, Universitas Negeri Gorontalo Sentia, Sentia; Program Studi Manajemen Sumber Daya Perairan, Fakultas Kelautan dan Teknologi Perikanan, Universitas Negeri Gorontalo Abas, Nurnaningsih; Program Studi Manajemen Sumber Daya Perairan, Fakultas Kelautan dan Teknologi Perikanan, Universitas Negeri Gorontalo Hasyim, Dandi; Program Studi Manajemen Sumber Daya Perairan, Fakultas Kelautan dan Teknologi Perikanan, Universitas Negeri Gorontalo 2025-10-18 15:20:03 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/70254 Kerapatan lamun; komposisi lamun; penutupan lamun; Teluk Tomini Gorontalo id Lamun memainkan peran vital dalam ekosistem pesisir, termasuk sebagai penyedia jasa ekosistem, habitat berbagai organisme laut, serta indikator kesehatan lingkungan perairan. Banyaknya peranan lamun tidak diiringi dengan penambahan luasannya. Luas lamun secara global mengalami penurunan, terutama karena dampak aktivitas manusia. Teluk Tomini Gorontalo, yang memiliki garis pantai sepanjang 572,5 km, menyimpan potensi sumber daya lamun yang cukup besar. Penelitian ini bertujuan untuk mengkaji sebaran, kerapatan, dan status kesehatan lamun di Perairan Teluk Tomini Gorontalo. Penelitian dilakukan di enam lokasi, tiga di perairan Teluk Tomini Kota Gorontalo dan tiga di Kabupaten Gorontalo. Tahapan penelitian terdiri dari dua tahapan yakni identifikasi dan pencatatan lamun menggunakan metode kuadrat pada transek sepanjang 100 m sejajar garis pantai dan kajian status kesehatan lamun melalui analisis tutupan lamun. Hasil penelitian menunjukkan bahwa terdapat sepuluh jenis lamun yakni Cymodocea rotundata, Cymodocea serrulata, Enhalus acoroides, Halophilla minor, Halophilla ovalis, Halodule pinifolia, Halodule uninervis, Thalassodendron ciliatum, Thalasia hemprichi, dan Syringodium isoetifolium, dengan C. rotundata memiliki kerapatan tertinggi (110,42 tegakan/m2). Tutupan lamun di perairan Teluk Tomini Gorontalo tergolong jarang-sedang, dengan kondisi kesehatan bervariasi dari rusak/miskin hingga rusak/kurang kaya/kurang sehat. Temuan ini menunjukkan bahwa meskipun potensi lamun besar, kondisi ekosistemnya memerlukan perhatian serius untuk menjaga keberlanjutan ekosistem dan kualitas lingkungan perairan.

oai:ojs.ejournal.undip.ac.id:article/19986 2020-04-17T12:07:23Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/19986 2020-04-17T12:07:23Z Buletin Oseanografi Marina Vol 8, No 1 (2019): Buletin Oseanografi Marina; 25-32 Arifah, Rizqi Umi; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Sedjati, Sri; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Supriyantini, Endang; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Ridlo, Ali; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2019-04-19 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/19986 Skeletonema costatum; Spektrum Cahaya; Pertumbuhan; Klorofil; Fukosantin id Skeletonema costatum mengandung klorofil-a, klorofil-c, dan fukosantin yang menyebabkan selnya berwarna hijau kecoklatan. Klorofil dan fukosantin memiliki berbagai manfaat, salah satunya dalam bidang kesehatan sebagai anti-bakteri, anti-oksidan, anti-inflamasi, anti-obesitas, anti-diabetes. Cahaya merupakan faktor lingkungan yang dapat mempengaruhi pertumbuhan dan kandungan pigmen pada mikroalga. Penelitian ini bertujuan untuk menentukan spektrum cahaya yang memiliki pengaruh terhadap pertumbuhan, kandungan klorofil dan fukosantin S. costatum. Penelitian ini dilakukan pada bulan Januari-Maret 2018 di Laboratorium Biologi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro dan pengujian laboratoris di Laboratorium BPIK Srondol, Semarang. Metode yang digunakan adalah metode eksperimental laboratoris. Diatom S. costatum dikultivasi dengan tiga spektrum cahaya yang berbeda yaitu putih, biru, dan merah. Pertumbuhan sel S. costatum diamati sampai 2 x 24 jam kemudian dipanen untuk perhitungan biomassanya. Biomassa kering hasil kultivasi diekstraksi menggunakan metanol. Kadar pigmen ekstrak metanol dianalisis menggunakan spektrofotometer UV-Vis dan identifikasi pigmen dengan uji Kromatografi Lapis Tipis (KLT). Hasil penelitian menunjukkan bahwa perlakuan cahaya putih secara signifikan meningkatkan kandungan klorofi- a S. costatum dibandingkan spektrum cahaya merah, namun tidak berbeda nyata terhadap spektrum cahaya biru. Pertumbuhan, kandungan klorofil-c dan fukosantin S. costatum pada pemberian spektrum cahaya yang berbeda tidak menunjukkan perbedaan nyata. Skeletonema costatum contains chlorophyll-a, chlorophyll-c, and fucoxanthin giving to its cells. Chlorophyll and fucoxanthin have various benefits, e.g. in the medicine field as anti-bacterial, anti-oxidant, anti-inflammatory, anti-obesity, and anti-diabetes. Light is one of the environmental factor that affects the growth and pigment content of microalgae. This study aims to determine the spectrum of light that influences growth, chlorophyll content and fucoxanthin of S. costatum. This research was conducted in January-March 2018 at the Biology Laboratory, Faculty of Fisheries and Marine Sciences, Diponegoro University and laboratory testing at the BPIK Srondol Laboratory, Semarang. The method used was a laboratory experimental method. Diatom S. costatum was cultivated with three different spectrums of light (white, blue, and red). Growth of S. costatum cells was observed up to 2x24 hours and then harvested for biomass calculations. Dry biomass was extracted using methanol. Pigment content of The S. costatum methanol extract was analyzed using UV-Vis spectrophotometer and pigments identification using Thin Layer Chromatography (TLC). The results showed that the chlorophyll content of S. costatum under white light spectrum was significantly higher from the red light spectrum, but not significantly different from blue light spectrum. Growth, chlorophyll-c and fucoxanthin content of S. costatum didn’t show significant differences under different light spectra.

oai:ojs.ejournal.undip.ac.id:article/49510 2023-06-20T04:50:15Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/49510 2023-06-20T04:50:15Z Buletin Oseanografi Marina Vol 12, No 2 (2023): Buletin Oseanografi Marina; 213-222 Setyawati, Diah Ayu; Program Studi Ilmu Kelautan, Jurusan Kelautan dan Perikanan, Universitas Trunojoyo Madura Nuzula, Nike Ika; Program Studi Ilmu Kelautan, Jurusan Kelautan dan Perikanan, Universitas Trunojoyo Madura Jayanthi, Onie Wiwid; Program Studi Ilmu Kelautan, Jurusan Kelautan dan Perikanan, Universitas Trunojoyo Madura Kartika, Ary Giri Dwi; Program Studi Ilmu Kelautan, Jurusan Kelautan dan Perikanan, Universitas Trunojoyo Madura Rahayu, Eka Putri; Program Studi Ilmu Kelautan, Jurusan Kelautan dan Perikanan, Universitas Trunojoyo Madura 2023-06-20 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/49510 TSS; Ocean Data View (ODV); RStudio id Perairan Padelegan terletak di Kecamatan Pademawu bagian selatan pesisir Kabupaten Pamekasan, Jawa Timur. Daerah ini termasuk salah satu daerah yang memproduksi garam paling tinggi di Kabupaten Pamekasan. Kualitas perairan adalah aspek penting dalam menghasilkan garam dengan kualitas bagus. Salah satu parameter yang memengaruhi kualitas perairan yaitu Total Suspended Solid (TSS). Penelitian ini bertujuan untuk mengetahui sebaran kadar TSS secara vertikal dan horizontal di perairan Padelegan. Pada penelitian ini menggunakan metode purposive sampling. Sedangkan metode untuk analisa kandungan TSS yaitu metode gravimetri SNI 6989.3:2019, serta persebaran kandungan TSS secara vertikal dan horizontal menggunakan software Ocean Data View. Hasil penelitian menunjukan nilai TSS di permukaan perairan Padelegan berkisar antara 189-230 mg/L; pada kolom perairan sebesar 210-239 mg/L; dan pada dasar perairan sebesar 245-273 mg/L. Persebaran TSS secara vertikal menunjukan semakin meningkat  dari permukaan menuju dasar perairan. Sedangkan persebaran TSS secara horizontal menunjukkan tren yang semakin meningkat dari laut lepas menuju muara. Uji korelasi antara TSS dengan parameter kualitas air menggunakan RStudio menghasilkan nilai koefisien yaitu korelasi antara TSS dengan pH, suhu, salinitas, DO, dan kecerahan secara urut sebesar -0,32, 0,27, -0,42, -0,14, dan -0,44. Semakin rendah kadar TSS di perairan, maka menghasilkan garam yang lebih berkualitas. Kadar TSS yang tinggi pada perairan dapat meningkatkan nilai kekeruhan dan berpengaruh terhadap banyaknya pengotor yang terkandung pada garam.    The Padelegan waters are located in Pademawu District, in the southern part of the Pamekasan Regency, East Java. This area is one of the areas that produces the highest salt in Pamekasan Regency. Water quality is an important aspect in producing good quality salt. One of the parameters that affect water quality is Total Suspended Solid (TSS). This study aims to determine the distribution of TSS levels vertically and horizontally in Padelegan waters. In this study using purposive sampling method. While the method for analyzing TSS content is the gravimetric method SNI 6989.3: 2019, as well as the vertical and horizontal distribution of TSS content using Ocean Data View software. The results showed that the TSS values on the surface of the Padelegan waters ranged from 189-230 mg/L; in the water column of 210-239 mg/L; and at the bottom of the waters of 245-273 mg/L. The distribution of TSS vertically shows an increasing trend from the surface to the bottom of the waters. While the distribution of TSS horizontally shows an increasing trend from the high seas to the estuaries. The correlation test between TSS and water quality parameters using RStudio yielded coefficient values, namely the correlation between TSS and pH, temperature, salinity, DO, and brightness, respectively, -0.32, 0.27, -0.42, -0.14, and -0.44. The lower the TSS level in the waters, the higher quality salt will be produced. High TSS levels in waters can increase turbidity values and affect the amount of impurities contained in salt.

oai:ojs.ejournal.undip.ac.id:article/6945 2014-05-22T07:33:05Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6945 2014-05-22T07:33:05Z Buletin Oseanografi Marina Vol 2, No 3 (2013): Buletin Oseanografi Marina; 1-11 Ismunarti, Dwi Haryo; Program Studi Oseanografi, Jurusan Ilmu Kelautan, FPIK UNDIP Rochaddi, Baskoro; Program Studi Oseanografi, Jurusan Ilmu Kelautan, FPIK UNDIP 2013-07-22 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6945 en Penelitian telah dilakukan di perairan Nusa Tenggara Barat (NTB), pada tiga musim : peralihan (22 – 25 Mei 2009), musim timur (23-26 Juli 2009), dan musim barat (19 – 22 Nofember 2009). Lokasi penelitian tersebar di dua wilayah yaitu perairan Pulau Lombok, tepatnya di perairan Tanjung Sira (stasiun 1), dan Ampenan (stasiun 2) di Kabupaten Lombok Barat dan di perairan Teluk Saleh (stasiun 3) Sumbawa Besar. Tujuan dari penelitian ini untuk mengetahui kondisi pola arus di perairan Nusa Tenggara Barat baik melalui pengukuran lapangan maupun menggunakan model matematik. Pengukuran kecepatan dan arah arus menggunakan current meter tipe valeport. Pola arus pada musim peralihan dengan kecepatan arus rata-rata berkisar 0,053 – 0,223 m/det dengan arah menuju ke tenggara – baratdaya (arah 132o – 224o). Pola arus pada musim timur dengan kecepatan arus rata-rata berkisar 0,048 – 0,130 m/det dengan arah menuju ke baratdaya (arah 182o – 262o). Sedangkan pola arus pada musim barat dengan kecepatan arus rata-rata berkisar 0,092 – 0,177 m/det dengan arah menuju ke tenggara (arah 142o – 171o). Berdasarkan model matematik, terdapat perbedaan pola arus di sebelah utara NTB dan sebelah selatan. Kecepatan arus bervariasi antara 0,070 – 0,351 m/det. Kecepatan arus terbesar berada pada daerah selat seperti antara Pulau Lombok dan Pulau Sumbawa. Kata kunci :     pola arus, musim peralihan, musim timur, musim barat, model matematik, perairan Nusa Tenggara Barat.

oai:ojs.ejournal.undip.ac.id:article/56615 2024-05-31T07:50:39Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/56615 2024-05-31T07:50:39Z Buletin Oseanografi Marina Vol 13, No 1 (2024): Buletin Oseanografi Marina; 91-99 Supratman, Okto; Jurusan Manajemen Sumberdaya Perairan, Fakultas Pertanian Perikanan dan Biologi, Universitas Bangka Belitung Adi, Wahyu; Jurusan Manajemen Sumberdaya Perairan, Fakultas Pertanian Perikanan dan Biologi, Universitas Bangka Belitung Muftiadi, M. Rizza; Jurusan Manajemen Sumberdaya Perairan, Fakultas Pertanian Perikanan dan Biologi, Universitas Bangka Belitung Henri, Henri; Jurusan Biologi, Fakultas Pertanian Perikanan dan Biologi, Universitas Bangka Belitung Pamungkas, Aditya; Jurusan Ilmu Kelautan, Fakultas Pertanian Perikanan dan Biologi, Universitas Bangka Belitung 2024-02-06 14:07:58 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/56615 Bangka Selatan; kesehatan; lamun; tutupan id Ekosistem lamun di Bangka Selatan terjadinya gangguan dan ancaman dari beberapa aktivitas antropogenik. Akan tetapi data tentang kondisi dan kesehatan padang lamun sangat terbatas. Tujuan penelitian adalah menganalisis kekayaan jenis, persentase tutupan dan kesehatan ekosistem padang lamun. Penelitian dilaksanakan pada bulan Februari 2022 hingga Desember 2022 di Kabupaten Bangka Selatan yang meliputi pesisir Tanjung Kerasak, Pantai Tukak, Pantai Penutuk, Pulau Anak Air dan Pantai Puding. Tahapan penelitian terdiri dari 1) Pengumpulan data lamun, makroalga, dan epifit, 2) Pengukuran parameter lingkungan, 3) Analisis data meliputi analisis kesehatan lamun dengan metode Indeks Kesehatan Ekosistem Lamun (IKEL). Hasil penelitian  terdapat 8 jenis lamun yang ditemukan di lokasi penelitian yaitu Enhalus acoroides, Thalassia hemprichii, Oceana serrulata, Cymodocea rotundata, Halodule uninervis, Halophila minor, Halophila ovalis, dan Halodule pinifolia. Nilai tutupan lamun berkisar antara antara 2,04% hingga 41,93%  dengan rata-rata tutupan lamun yaitu 26,8 % yang dikategorikan miskin. Indek kesehatan ekosistem lamun (IKEL) di Bangka Selatan berkisar antara 0,60 sampai dengan 0,70 atau dikategorikan sedang sampai dengan baik. Kondisi kesehatan ekosistem lamun dikategorikan baik ditemukan di Pentuk (0,70), sedangkan dikategorikan sedang ditemukan di Tanjung Kerasak (0,68), Pantai Tukak (0,62), Pantai Puding (0,60), dan Pulau Anak Air (0,61).   The seagrass ecosystem in South Bangka is experiencing disturbance and threats from several anthropogenic activities. However, data on the condition and health of seagrass beds is very limited. The aim of the research is to analyze species richness, percentage cover and health of the seagrass ecosystem. The research was carried out from February 2022 to December 2022 in South Bangka Regency which includes the coast of Tanjung Kerasak, Tukak Beach, Penutuk Beach, Anak Air Island and Puding Beach. The research stages consisted of 1) collecting data on seagrass, macroalgae and epiphytes, 2) measuring environmental parameters, 3) data analysis including analysis of seagrass health using the Seagrass Ecological Quality Index (SEQI) method. The research results showed that there were 8 spesies of seagrass found at the research location. Spesies founded is Enhalus acoroides, Thalassia hemprichii, Oceana serrulata, Cymodocea rotundata, Halodule uninervis, Halophila minor, Halophila ovalis, and Halodule pinifolia. The seagrass cover value ranges from 2.04% to 41.93% with average seagrass cover is 26.8% which is categorized as poor. The seagrass ecology quality index in South Bangka ranges from 0.60 to 0.70 which categorized  as moderate to good. The health condition of the seagrass ecosystem was assessed as good in Pentuk (0.70), while moderate was found in Tanjung Kerasak (0.68), Tukak Beach (0.62), Puding Beach (0.60), and Anak Air Island (0. .60).

oai:ojs.ejournal.undip.ac.id:article/50694 2023-11-04T02:49:24Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/50694 2023-11-04T02:49:24Z Buletin Oseanografi Marina Vol 12, No 3 (2023): Buletin Oseanografi Marina; 331-339 Isnaini, Isnaini; Jurusan Ilmu Kelautan, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Sriwijaya Aryawati, Riris; Jurusan Ilmu Kelautan, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Sriwijaya 2023-10-01 06:25:40 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/50694 Kerapatan lamun; Faktor lingkungan; sedimen; Teluk Lampung id Ekosistem lamun memiliki peranan sangat penting di wilayah pesisir. Seiring waktu wilayah pesisir menghadapi ancaman yang cukup besar akibat dari meningkatnya dan berkembangnya kegiatan pembangunan, seperti disebagian besar yang terjadi di ekosistem laut di Teluk Lampung. Penelitian ini bertujuan menentukan parameter lingkungan perairan yang mempengaruhi kerapatan lamun. Penelitian ini terdiri dari delapan stasiun yang ditentukan secara purposive sampling. Pengukuran parameter lingkungan perairan dilakukan secara insitu dan pengambilan contoh air. Pengambilan data kerapatan lamun menggunakan metode transek kuadrat. Analasis hubungan kerapatan lamun dengan parameter lingkungan perairan dianalisis menggunakan Analisis Komponen Utama (Principal Component Analysis/PCA). Hasil penelitian ditemukan sebanyak enam jenis lamun, yaitu Oceana serrulata, Enhalus acoroides Thalassia hemprichii, Halodule ovalis, Halodule pinifolia dan Halodule uninervis. Hubungan kerapatan lamun dengan parameter lingkungan perairan menunjukkan di kolom air kerapatan lamun dipengaruhi oleh nitrat (NO3), fosfat (PO4) dan salinitas, sedangkan untuk sedimen tempat tumbuh lamun, kerapatan lamun lebih dipengaruhi oleh kandungan C-organik dan tekstur sedimen lanau.    Seagrass ecosystems have a very important role in coastal areas, but over time face considerable threats as a result of the increase and development of development activities in coastal areas, such as most of the marine ecosystem areas in Lampung Bay. This study aims to determine the parameters of the aquatic environment that affect the density of seagrass. This study consisted of eight stations determined by purposive sampling. Measurement of aquatic environmental parameters was carried out in situ and water samples were taken. Seagrass density data retrieval using the quadratic transect method. Analysis of the relationship between seagrass density and aquatic environmental parameters was analyzed using Principal Component Analysis (PCA). The results of the study found as many as six types of seagrass, namely Oceana serrulata, Enhalus acoroides Thalassia hemprichii, Halodule ovalis, Halodule pinifolia and Halodule uninervis. The relationship between seagrass density and aquatic environmental parameters shows that in the water column the density of seagrass is influenced by nitrate (NO3), phosphate (PO4) and salinity, while in sediments the density of seagrass is more influenced by organic C content and silt sediment texture. 

oai:ojs.ejournal.undip.ac.id:article/36552 2021-06-08T16:31:28Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/36552 2021-06-08T16:31:28Z Buletin Oseanografi Marina Vol 10, No 2 (2021): Buletin Oseanografi Marina; 171-179 Fadlan, Ahmad; Sekolah Tinggi Meteorologi Klmatologi dan Geofisika Rizki, Muchammad; Sekolah Tinggi Meteorologi Klmatologi dan Geofisika Pahlewi, Tomi Ilham; Badan Meteorologi Klimatologi dan Geofisika Prasetyo, Mohammad Ridwan Nur; Badan Meteorologi Klimatologi dan Geofisika Bali, Fajar Masan; Badan Meteorologi Klimatologi dan Geofisika Badriyah, Imelda Umiyatul; Badan Meteorologi Klimatologi dan Geofisika Lukman, Muhammad Aldi; Stasiun Meteorologi Maritim Pontianak 2021-05-22 17:24:30 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/36552 Short wave Radiation; Sea Temperature; Indian Ocean en The purpose of this study was to know the results of the relation between short wave radiation (SWR) and sea temperature. This study used data of SWR and sea temperature from RAMA buoy which part of the data was obtained by the INA-PRIMA 2019. Besides, the SWR and Sea Temperature model data from ERA-5 and Copernicus were required to see these spatial and temporal variations. Diurnal analysis to determine the sea temperature responds to SWR parameters. While monthly analysis to see the variations of SWR and the sea temperature during Indian Ocean Dipole (IOD). The results show that there is a different response at sea temperature for each layer to the SWR parameter in diurnal. SWR can affect sea temperatures until 20 meters of depth. There is a time lag between 2 and 3 hours when the sun heats the sea until the sea surface temperature increases. The 20 meters of depth has a lag time until 4 hours. As for 40 to 80 meters of depth, the sea temperature was not longer responded by SWR, and the temperature is changed by the strength of these mixing.Warm pools are generally located in East Indian Ocean and the high SWR were very strong in West Indian Ocean along an anual.

oai:ojs.ejournal.undip.ac.id:article/63137 2025-03-10T06:42:08Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/63137 2025-03-10T06:42:08Z Buletin Oseanografi Marina Vol 13, No 3 (2024): Buletin Oseanografi Marina; 464-474 Kresnasari, Dewi; Aquatic Resource Management Doctoral Program, Faculty of Fisheries and Marine Sciences, Universitas Diponegoro Fisheries Science Study Program, Faculty of Science and Technology, Universitas Nahdaltul Ulama Purwokerto Zainuri, Muhammad; Department of Oceanography, Faculty of Fisheries and Marine Sciences, Universitas Diponegoro Muskananfola, Max Rudolf; Department of Aquatic Resources, Faculty of Fisheries and Marine Sciences, Universitas Diponegoro Pribadi, Rudhi; Department of Marine Science, Faculty of Fisheries and Marine Sciences, Universitas Diponegoro 2024-10-30 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/63137 herbivory, mangrove forest, leaf damage en Segara Anakan Mangrove Forest in Cilacap is one of the most extensive mangrove forests on the southern coast of Java Island. This study aims to determine the level of herbivory and environmental conditions. The sampling technique used was purposive random sampling, which considered the different characteristics of the vegetation. Sonneratia caseolaris dominated Station 1, while Station 2 was more diverse, including Avicennia marina, Avicennia alba, Rhizophora mucronata, Sonneratia caseolaris, and Aegiceras corniculatum. Each station is spread over three points, each with five sampling plots, representing the distribution and zonal homogeneity of carrying capacity. The research was conducted in May, August, and November 2023, based on the different temporal seasons in Indonesia. The results showed biotic factors from herbivory activity and abiotic factors such as the hydrological cycle caused mangrove leaf damage. The class of leaf damage caused by herbivory at all observation stations was mainly in class I (<2.5%). The most leaf damage was found in old leaves, which is related to the optimal photosynthesis process producing carbohydrates as a food source for herbivores. Additionally, tannin content in the leaves plays a role in protection from excessive UV radiation during the dry season. This condition indicates that Segara Anakan mangrove forest is still in good condition. PCA analysis results show that mangrove leaf damage is closely related to the age of the leaves.

oai:ojs.ejournal.undip.ac.id:article/15729 2020-04-17T12:02:44Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/15729 2020-04-17T12:02:44Z Buletin Oseanografi Marina Vol 5, No 2 (2016): Buletin Oseanografi Marina; 107-114 Febriana, Himatul Aliyah; Program Studi Manajemen Sumberdaya Perairan, Departemen Sumberdaya Akuatik Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Purnomo, Pujiono Wahyu; Program Studi Manajemen Sumberdaya Perairan, Departemen Sumberdaya Akuatik Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Suryanti, Suryanti; Program Studi Manajemen Sumberdaya Perairan, Departemen Sumberdaya Akuatik Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2016-10-09 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/15729 en Ekosistem lamun merupakan ekosistem yang memiliki produktivitas primer yang tinggi, hal tersebut didukung oleh keberadaan perifiton yang melekat pada permukaan daun lamun. Pengaruh tersebut dapat berkurang akibat adanya kegiatan perikanan atau aktivitas antropogenik yang menyebabkan pencemaran kandungan logam berat seperti Pb dan Cd. Tujuan penelitian adalah untuk mengetahui jenis lamun, kelimpahan perifiton dan kandungan logam berat pada daun lamun serta hubungan kelimpahan perifiton dengan kandungan logam berat di Pantai Barat Bandengan. Penelitian ini menggunakan metode deskriptif, dilaksanakan pada bulan Maret - April 2016 di Pantai Barat Bandengan pada lingkungan lamun padat,  sedang dan jarang. Sampling menggunakan metode purposive random dengan menentukan obyek yang diambil sebagai sampel berdasarkan kerapatan lamun. Jenis lamun yang ditemukan di Pantai Barat Bandengan adalah Thalassia sp. Rata-rata kelimpahan perifiton pada kerapatan lamun padat, sedang dan jarang adalah 1742 (SD = 641,09)  ind/cm2, 1481 (SD = 369,06) ind/cm2, dan 1249 (SD = 116,15) ind/cm2. Perifiton yang ditemukan dari Kelas Bacillariophyceae, Cyanophyceae, Euglenophyceae, Rodhophyceae, Dinophyceae dan Chlorophyceae. Hasil logam berat  Pb dan Cd selama tiga kali sampling diperoleh nilai yang sama yaitu Pb <100 mg/gr dan Cd <10 mg/gr Berdasarkan hasil penelitian disimpulkan bahwa adanya kandungan logam berat Pb dan Cd tidak mempengaruhi keberadaan perifiton pada daun lamun di perairan Pantai Barat Bandengan. Kata kunci: Lamun, Perifiton, Logam Berat Pb dan Cd

oai:ojs.ejournal.undip.ac.id:article/39514 2022-09-07T17:08:50Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/39514 2022-09-07T17:08:50Z Buletin Oseanografi Marina Vol 11, No 2 (2022): Buletin Oseanografi Marina; 156-166 Erlangga, Erlangga; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Malikussaleh Imanullah, Imanullah; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Malikussaleh Syahrial, Syahrial; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Malikussaleh Erniati, Erniati; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Malikussaleh Imamshadiqin, Imamshadiqin; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Malikussaleh Ritonga, Gara Hasonangan; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Malikussaleh Siregar, Dodi Fanhalen; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Malikussaleh 2022-05-20 08:04:55 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/39514 Kondisi Eksisting; Tiram; Ostreoidae; Lhokseumawe id Kajian kondisi eksisting tiram dilakukan pada tiga stasiun pengamatan di perairan estuari Desa Banda Masen (Juli – September 2020). Kajian bertujuan untuk mengetahui faktor lingkungan, distribusi dan biodiversitas, kepadatan, frekuensi pertumbuhan serta karakteristik lingkungan tiram, dimana sampel dikumpulkan dalam plot yang berukuran 1x1 m pada sisi kiri, tengah dan kanan estuari, sedangkan keterkaitan parameter kualitas perairan terhadap kepadatan maupun morfometrik tiram dianalisis berdasarkan Principle Component Analysis (PCA). Hasil kajian memperlihatkan bahwa konsentrasi DO berkisar antara 07,85–07,87 mg/L, suhu 30,00–32,00°C, salinitas 32,50–35,00‰, pH 07,90–08,13, kekeruhan 27,90–28,17 NTU, kecerahan 00,20–00,22 cm, kedalaman 01,20–01,27 m dan intensitas cahaya 449–452 Lux. Selain itu, hasil kajian juga memperlihatkan tiram terdistribusi di semua stasiun pengamatan, terdiri dari dua spesies dengan kepadatan S. cucullata antara 02,33–04,11 ind/m2 dan kepadatan S. echinata antara 02,11–03,56 ind/m2. Untuk frekuensi pertumbuhan morfometrik, panjang cangkang S. cucullata dominannya adalah 04,28–04,91 cm, lebar cangkang 03,48–04,06 cm, berat isi 03,18–04,85 mg dan berat cangkang 15,86–20,43 mg. Selanjutnya untuk frekuensi pertumbuhan morfometrik S. echinata, panjang cangkang dominannya adalah 03,82–04,27 cm, lebar cangkang 02,96–03,41 cm, berat isi 03,12–04,12 mg serta berat cangkang 15,06–19,33 mg, dimana kepadatan maupun berat isi S. cucullata sangat ditentukan oleh intensitas cahaya, salinitas, suhu dan kekeruhan perairan, sedangkan kecerahan perairan kurang memberikan pengaruh yang baik bagi kepadatan maupun berat isi tiram S. cucullata, kecuali bagi pertumbuhan panjang cangkang S. echinata, panjang cangkang S. cucullata, berat isi dan berat cangkang S. echinata.    The study of the existing condition of oysters was carried out at three observation stations in the estuary of Banda Masen Village during July until September 2020. The study aims to determine environmental factors, distribution, biodiversity, density, growth frequency and environmental characteristics of oysters. Samples were collected in plots with measuring 1x1 m on the left, middle and right sides of the estuary. Furthermore, the correlation parameters of water quality on density and morphometric of oysters to be analyzed base on Principle Component Analysis (PCA). The results showed that DO concentrations ranged between 07,85–07,87 mg/L, temperature 30,00–32,00°C, salinity 32,50–35,00‰, pH 07,90–08,13, turbidity 27,90–28,17 NTU, brightness 00,20–00,22 cm, depth 01,20–01,27 m and light intensity 449,00–452,00 Lux. In addition, the results of the study also depict that oysters were distributed in all observation stations which consisting of two species with density of S. cucullata and S. echinata between 02,33–04,11 ind/m2 and 02,11–03,56 ind/m2, respectively. The frequency of morphometric growth illustrates the dominant shell of S. cucullata was 04,28–04,91 cm in length, 03,48–04,06 cm in width, and 15,86–20,43 mg in weight with bulk have 03,18–04,85 mg in weight. Furthermore, the frequency of morphometrics growth of S. echinata have dominant shell was 03,82–04,27 cm in length, 02,96–03,41 cm in width, 15.06 –19,33 mg in weight with bulk have 03,12–04,12 mg in weight. The density and weight of the bulk of S. cucullata were largely determined by light intensity, salinity, temperature and turbidity of the waters. Meanwhile, the brightness did not give significant influence except for the length of two species and density also weight of S. echinata.

oai:ojs.ejournal.undip.ac.id:article/2987 2012-04-03T06:15:12Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/2987 2012-04-03T06:15:12Z Buletin Oseanografi Marina Vol 1, No 1 (2011): Buletin Oseanografi Marina Dian P.F, Aristi Pramonowibowo, Pramonowibowo Kurohman, Faik Budi J, Bogi The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/2987 en Abstract             Dredged net  was a fishing gear in coastal areas of the dredged (mouth) and bag. Target catch dredged net in the waters Tambak Lorok was shrimp (crustacean). Dredged net  problem that exits due to the large hydrostatic pressure, and number of crew (ABK) a lot and still a chance that the capture of clams can be said to be non selective fishing gear. Aimed of dredged net modifications at improving the effectiveness and efficiency of the caught which would affect the welfare of fishermen, as well as making selective fishing gear through extension activities and training and mentoring             Modifications dredged net is located at the bottom of the mouth of the tool was originally made ​​of tooth-shaped bales iron into iron chains. Analysis of the technical effectiveness and efficiency of the caught showed that dredged net modifications better than the genenui dredged net.   Keywords: Dredged net modification, effective and efficiency

oai:ojs.ejournal.undip.ac.id:article/67593 2025-10-18T08:20:06Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/67593 2025-10-18T08:20:06Z Buletin Oseanografi Marina Vol 14, No 3 (2025): Buletin Oseanografi Marina; 335-346 Batubara, Paisal; Program Studi Akuakultur, Fakultas Pertanian, Universitas Samudra Putriningtias, Andika; Program Studi Akuakultur, Fakultas Pertanian, Universitas Samudra Komariyah, Siti; Program Studi Akuakultur, Fakultas Pertanian, Universitas Samudra Faisal, Teuku Muhammad; Program Studi Akuakultur, Fakultas Pertanian, Universitas Samudra 2025-10-18 15:19:59 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/67593 Air; Langsa; Mangrove; Silvofishery; Substrat id Ekosistem mangrove merupakan suatu ekosistem perairan unik yang berperan penting dalam mendukung kehidupan akuatik, sebagai sumber makanan, tempat pembesaran dan tempat pemijahan bagi berbagai organisme. Pertumbuhan mangrove tidak luput dari faktor-faktor yang mempengaruhinya. Salah satu parameter yang mempengaruhi pertumbuhan kerapatan mangrove adalah substrat dan air. Penelitian ini bertujuan untuk mengevaluasi nilai karakteristik fisika kimia substrat dan air terhadap kerapatan mangrove pada area restorasi mangrove untuk silvofishery di Langsa Barat, Kota Langsa. Penelitian yang dilakukan pada Bulan Oktober – November 2023 di area restorasi mangrove Gampong Seuriget, Langsa Barat, Kota Langsa, Aceh. Metode yang digunakan yaitu purposive sampling dengan 3 stasiun berdasarkan perbedaan umur tanam. Data mangrove dikumpulkan dengan metode transek 1x1, 5x5 dan 10x10. Pengambilan sampel sedimen menggunakan sekop dan sampel air menggunakan botol kaca. Hasil penelitian menunjukkan bahwa kerapatan mangrove termasuk pada kategori jarang dan padat. Nilai kerapatan mangrove tertinggi pada stasiun A ditemukan nilai sebesar 2.333 (ind./ha) dan kerapatan mangrove terendah pada stasiun B dengan nilai 500 (ind./ha). Tekstur tanah termasuk jenis lempung berpasir. Kualitas air memiliki rata-rata kisaran suhu 29-30 0C, nilai pH air 7,3 –7,7, salinitas pada kisaran 29,1-30,2 0/00, DO 4,48-5,2 mg/L, kandungan amonia 0,4-0,9 ppm, nitrat 3,4-6,5 ppm, fosfat 1,3-4,3 ppm.  Kualitas sedimen menunjukkan hasil pH tanah 6,3-6,4, unsur hara tanah C-Organik 1,5-3,0 %, N-total 0,2 %, dan P-tersedia 17,0-18,1 ppm. Hasil uji analisis statistik menunjukkan bahwa tidak ada korelasi antara karakteristik fisika kimia substrat dengan air dan nilai karakteristik substrat dengan kerapatan mangrove yang ada. Sedangkan fisika kimia air seperti pH air, salinitas, dan fosfat berkorelasi dengan kerapatan mangrove yang ada. Berdasarkan hasil analisis parameter kualitas air dan sedimen, ketiga stasiun penelitian dapat digunakan sebagai silvofishery.

oai:ojs.ejournal.undip.ac.id:article/19081 2020-04-17T12:05:55Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/19081 2020-04-17T12:05:55Z Buletin Oseanografi Marina Vol 7, No 1 (2018): Buletin Oseanografi Marina; 59-66 Wibowo, Edi; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Ario, Raden; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Suryono, Suryono; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Taufiq, Nur; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Destalino, Destalino; SMK Negeri 1 Paguyaman Pantai 2018-05-24 17:39:40 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/19081 Rumput laut atau seaweed termasuk tumbuhan berthallus yang banyak dijumpai hampir di seluruh pantai Indonesia, terutama wilayah pantai yang mempunyai rataan terumbu karang.  Perbedaan mendasar sistem hidupnya dengan tumbuhan darat adalah dalam pengambilan zat-zat makanan. Tumbuhan darat sangat bergantung pada akar sebagai alat pengambil/ penyerap zat hara dari substrat, sedangkan rumput laut menyerap zat hara yang dibutuhkan bagi pertumbuhannya dari medium air dengan cara difusi melalui permukaan substansi fisiknya.Penelitian ini bertujuan untuk mengetahui struktur komunitas rumput laut di perairan Pasir Panjang Pulau Limbah, Kecamatan Paguyaman Pantai, Kabupaten Boalemo, Provinsi Gorontalo. Metoda penelitian yang digunakan adalah bersifat diskriptif.Adapun pengumpulan data dilakukan dengan metode sample survey methods. Hasil penelitian menunjukan bahwa perairan Pulau Limbah di dominasi oleh Rumput Laut Coklat dengan kelimpahan tertinggi Padina australis. Nilai Indeks Keanekaragaman (H’) Rumput Laut tertinggi terdapat pada stasiun C dengan nilai rerata: 1,854 dan yang terendah pada Stasiun A dengan nilai rerata: 1,469. Nilai Indeks Keseragaman (E)  nilai tertinggi terdapat pada Stasiun C dengan nilai rerata: 0,679 dan terendah pada stasiun A dengan nilai rerata: 0,668. Nilai indeks Dominansi (C) tertinggi terdapat pada Stasiun A dengan nilai rerata : 0,251 dan nilai terendah stasiun B dengan nilai rerata: 0,187. Analisis Ragam (Anova) menunjukan bahwa stasiun penelitian memberikan perbedaan yang nyata (P≤0,05) terhadap nilai Indeks Keanekaragaman (H’), Indeks Keseragaman (E) serta Indeks Dominasi (C).  Seaweed including thallus plants that are found almost all over the coast of Indonesia, especially on beaches that have coral reefs. Seaweed is a photosynthetic organism as well as plants on land. The fundamental difference of his life system is in the taking of food substances. Ground plants realy heavily on roots as a nutrient removal device from the substrate, while seaweed absorbs the nutrients needed for its growth from the water medium by diffusion through the surface of its physical substance. This study aims to determine the structure of seaweed communities in Limbah Island Waters, District Paguyaman Beach. The results showed that the waters of Limbah Island is dominated by brown seaweed with the highest species abundance was Padina australis. The highest index value of Seaweed diversity (H’) was found at station C with average: 1,854 and the lowest at station A with a mean of: 1,469. For uniformity index value (E) the highest value is at station C with average: 0,679 and the lowest at station A with a mean of: 0,668. The highest index value of dominance (C) is at station A with a mean of: 0,251 and the lowest value at station B with a mean of: 0,187. The result of the analysis of variance (Anova) showed that the research station give a significant difference (P≤0,05) to the Diversity Index (H’), Uniformity Index (E) and Domination Index (C).

oai:ojs.ejournal.undip.ac.id:article/48377 2023-05-13T09:22:51Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/48377 2023-05-13T09:22:51Z Buletin Oseanografi Marina Vol 12, No 1 (2023): Buletin Oseanografi Marina; 109-124 Yustiana, Meida; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Stasiun Meteorologi Kelas II Ahmad Yani Semarang Zainuri, Muhammad; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Sugianto, Denny Nugroho; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Batubara, Mahardiani Putri Naulia; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Hidayat, Anistia Malinda; Stasiun Meteorologi Kelas II Ahmad Yani Semarang 2023-02-04 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/48377 El Niño; La Niña; Anomali TML; Curah hujan id El Niño dan La Niña memiliki pengaruh signifikan terhadap dinamika cuaca di wilayah Indonesia. Oleh karena itu, penelitian ini bertujuan untuk mengetahui dampak fenomena tersebut terhadap curah hujan (CH) dan anomali tinggi muka laut (TML) di Pantai Utara Jawa Tengah meliputi wilayah Brebes, Pemalang, Pekalongan dan Semarang menggunakan analisis kuantitatif deskriptif selama  1993 – 2020. Data yang digunakan pada penelitian ini adalah anomali TML, anomali suhu permukaan laut, dan data observasi CH bulanan dari pos hujan Pusdataru dan BMKG. Data tersebut ditampilkan dalam bentuk grafik anomali CH dan grafik overlay indeks Nino 3.4 dan anomali TML yang dikelompokkan berdasarkan data komposit 3 bulan. Hasil analisis menunjukkan bahwa pada periode pengamatan terjadi 2 kali El Niño sangat kuat pada November 1997 dan November 2015 dan juga 2 kali La Niña kuat pada Januari 2000 dan Januari 2008 dengan periode perulangan rerata setiap 8 tahun. Hubungan signifikan antara El Niño dan La Niña yang diwakili oleh indeks Nino 3.4 terhadap CH di Indonesia terjadi pada periode September-Oktober-November (SON), dengan nilai koefisien korelasi -0.53692 – (-0.7304). Masih dalam periode yang sama, hubungan anomali CH dan anomali TML juga menunjukkan nilai koefisien korelasi tertinggi di Semarang, Pekalongan dan Pemalang sebesar 0.546202 - 0.676914.  El Niño and La Niña are two of several components of climate variability which has significant influence toward weather dynamics over Indonesia, including on the North Coast of Central Java. For this reason, this research aims to determine the impact of these two phenomena on rainfall and sea level anomaly (SLA) on the North Coast of Central Java covering Brebes, Pemalang, Pekalongan, and Semarang Regions using descriptive quantitative analysis using data from 1993 – 2020. The data used in this study were SLA, sea surface temperature anomaly in the Nino 3.4 region, and monthly rainfall observation data from the Pusdataru and BMKG rain posts, displayed in the form of a rainfall anomaly graph and an overlay graph of the Nino 3.4 index and SLA and grouped based on 3 months composite data. The analysis result showed that during the observation period there were two strong El Niño, in November 1997 and 2015, and also two strong La Niña in January 2000 and 2008 with a repeating period every eight years. The significant relationship between El Niño and La Niña represented by the Nino index 3.4 on rainfall in Indonesia occurred in September-October-November (SON), with a correlation coefficient of -0.53692 – (-0.7304). Still in the same period, the relationship between rainfall anomaly and SLA also showed that the highest correlation coefficient value occurs in the SON month in Semarang, Pekalongan, and Pemalang at 0.546202 - 0.676914.

oai:ojs.ejournal.undip.ac.id:article/6933 2014-05-21T03:01:51Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6933 2014-05-21T03:01:51Z Buletin Oseanografi Marina Vol 2, No 2 (2013): Buletin Oseanografi Marina; 24-34 Satriadi, Alfi; Jurusan Ilmu Kelautan, Program Studi Oceanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Subardjo, Petrus; Jurusan Ilmu Kelautan, Program Studi Oceanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Saputra, Siddhi; Jurusan Ilmu Kelautan, Program Studi Oceanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Hariadi, Hariadi; Jurusan Ilmu Kelautan, Program Studi Oceanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Haryadi, Haryadi; Jurusan Ilmu Kelautan, Program Studi Oceanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2013-04-18 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6933 en Pemanfaatan daerah pantai antara Sungai Pekalongan hingga Sungai Klidang sebagai daerah potensi strategis bidang perikanan dan kelautan, mendorong dibangunnya sarana dan prasarana penunjang kegiatan eksploitasi sumber daya kelautan. Kelestarian fungsi sarana dan prasarana tersebut dipengaruhi oleh proses pantai dari kondisi geologi dan oseanografi di wilayah pantai. Studi ini bertujuan untuk mengetahui kondisi oseanografi meliputi arus, gelombang dan pasang surut dan geologi resen yaitu sedimen dasar, dan kandungan mineral logam. Penelitian dilaksanakan pada bulan Mei 2012 sampai dengan Oktober 2012. Data yang digunakan terbagi atas data primer (data arus, gelombang, pasang surut, batimetri, salinitas, sedimen dasar, dan kandungan logam sedimen ) dan data sekunder (data angin, debit sungai, meteorologi dan klimatologi, Peta RBI, Peta DAS, Peta LLN, Peta Geologi). Metode penelitian menggunakan metode kuantitatif dan metode penentuan titik pengukuran menggunakan metode purposive sampling method. Hasil penelitian menunjukkan tinggi gelombang rata-rata di Perairan Slamaran  0,46 meter, periode  2,82 detik dengan tipe pasang surut yaitu pasang surut campuran condong ke harian tunggal. Kondisi sebaran salinitas di Sungai Pekalongan didominasi oleh jenis air payau dengan nilai salinitas berkisar 1 ‰ sampai 20 ‰. Analisa sedimen dasar menghasilkan sedimen dasar perairan Sungai Pekalongan hingga Sungai Klidang didominasi jenis pasir (sand), pasir lanauan (silty sand) dan lanau pasiran (sandy silt).  Kandungan logam berat (Pb) berkisar antara 1,481 ppm - 32,403 ppm.   Kata kunci : arus, gelombang, sedimen, , Sungai Pekalongan, Sungai Klidang

oai:ojs.ejournal.undip.ac.id:article/29192 2020-09-27T10:49:01Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/29192 2020-09-27T10:49:01Z Buletin Oseanografi Marina Vol 9, No 1 (2020): Buletin Oseanografi Marina; 45-54 Sibero, Mada Triandala; Department of Marine Science, Faculty of Fisheries and Marine Science, Universitas Diponegoro Sitepu, Nunung Febriany; Universitas Sumatera Utara Zhou, Tao; Biotechnology Research Center, Toyama Prefectural University Igarashi, Yasuhiro; Biotechnology Research Center, Toyama Prefectural University 2020-04-30 08:00:13 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/29192 Antibacterial; fractions; HPLC; MDR; Trichoderma en Bioguided fractionation method is commonly used to obtained targeted fraction with certain biological activity. In this study, bioguided fractionation method using HPLC was applied to obtained antibacterial fractions from marine-derived fungus Trichoderma reesei PDSP 5.7. The result shows that fraction from mycelium and medium extract had antibacterial activity against ESBL E. coli and S. enterica ser. Typhi with a range of inhibition zone was 1.35±0.15 to 8.82±0.22 mm2. From 32 fractions of each extract, the mycelial extract had 7 active fractions, 3 active fractions from broth medium which extracted using 1-butanol and 5 active fractions from ethyl acetate extract. This study indicated that crude extract of fungus T. reesei PDSP 5.7 was more potential as the source of antibacterial agents rather than the crude extract that obtained from its broth medium.

oai:ojs.ejournal.undip.ac.id:article/46984 2024-05-31T07:50:39Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/46984 2024-05-31T07:50:39Z Buletin Oseanografi Marina Vol 13, No 1 (2024): Buletin Oseanografi Marina; 1-12 Rohmaniyah, Lailatur; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Widowati, Ita; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Nuraini, Ria Azizah Tri; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2024-02-06 14:07:55 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/46984 Mikroplastik; Rajungan; Air Laut; Sedimen; FTIR id Rembang merupakan salah satu wilayah yang memiliki daerah pantai, karena letaknya yang berada di Utara Pulau Jawa. Perairan laut Kabupaten Rembang merupakan salah satu penghasil perikanan yang besar di Indonesia, salah satu jenisnya yaitu rajungan (Portunus pelagicus). Rajungan sangat rentan terhadap kontaminasi mikroplastik dikarenakan hidup di daerah pasang surut (intertidal) atau didasar perairan yang langsung bersentuhan dengan substrat. Tujuan penelitian ini mengkaji dan menganalisis kandungan mikroplastik pada daging rajungan (Portunus pelagicus), air laut, dan sedimen di perairan laut Desa Gegunung Wetan, Kabupaten Rembang, Jawa Tengah. Sampel rajungan, air laut, dan sedimen kemudian dilakukan analisis kandungan mikroplastik menggunakan 2 metode, yaitu metode analisis fisikal yang di lakukan Laboratorium Tropical Marine Biotechnologi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro, Semarang dan metode analisis FTIR (Fourier Transform Infrared) yang dilakukan di Laboratorium Terpadu Universitas Gajah Mada, Yogyakarta. Hasil Penelitian menunjukkan ditemukan adanya partikel mikroplastik pada sampel rajungan adalah 68 partikel mikroplastik, dengan hasil FTIR menunjukan mikroplastik berjenis Polystyrene, Polycarbonate, Latex, Nitrile, dan Poly (Methyl Methacrylate) (PMMA atau Acrylic). Kemudian total kandungan mikroplastik pada sampel air laut adalah 28 partikel mikroplastik, dengan hasil FTIR menunjukan mikroplastik berjenis Polystyrene dan Polycarbonate. Selanjutnya total kandungan mikroplastik pada sampel sedimen adalah 33 partikel mikroplastik, dengan hasil FTIR menunjukan mikroplastik berjenis Polypropylene, Polycarbonate, Polystyrene, Polyethylene Terephthalate (PETE), dan Nitrile.  Rembang is one of the areas that has a coastal area, because it is located in the north of the island of Java. The marine waters of Rembang Regency are one of the largest fishery producers in Indonesia, one of which is the blue swimming crab (Portunus pelagicus). Crayfish are very susceptible to microplastic contamination because they live in intertidal areas or on the bottom of waters that are in direct contact with the substrate. The purpose of this study was to examine and analyze the content of microplastics in blue swimming crab meat (Portunus pelagicus), seawater, and sediments in the sea waters of Gegunung Wetan Village, Rembang Regency, Central Java. The blue swimming crab, seawater, and sediment samples were then analyzed for microplastic content using 2 methods, namely the physical analysis method carried out by the Tropical Marine Biotechnology Laboratory, Faculty of Fisheries and Marine Sciences, Diponegoro University, Semarang and the FTIR (Fourier Transform Infrared) analysis method carried out at the Integrated Laboratory of Gadjah Mada University, Yogyakarta. The results showed that microplastic particles were found in the swimming crab, seawater, and sediment samples. The total microplastic content in the swimming crab sample was 68 microplastic particles, with the FTIR results showing the microplastics of the types Polystyrene, Polycarbonate, Latex, Nitrile, and Poly (Methyl Methacrylate) (PMMA or Acrylic). Then, the total microplastic content in the seawater sample was 28 microplastic particles, with the FTIR results showing polystyrene and polycarbonate microplastics. Furthermore, the total microplastic content in the sediment sample was 33 microplastic particles, with FTIR results showing microplastics of the types Polypropylene, Polycarbonate, Polystyrene, Polyethylene Terephthalate (PETE), and Nitrile.

oai:ojs.ejournal.undip.ac.id:article/53306 2023-11-04T02:49:24Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/53306 2023-11-04T02:49:24Z Buletin Oseanografi Marina Vol 12, No 3 (2023): Buletin Oseanografi Marina; 423-432 Krisna, Heru Nur; Program Magister Ilmu Kelautan, Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Maslukah, Lilik; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Wulandari, Sri Yuliana; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2023-10-01 08:29:34 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/53306 eutrofikasi; TRIX; Global Model PISCES; Selat Sunda id Eutrofikasi perairan dapat memicu peningkatan proses biologis dan pertumbuhan alga yang meningkatkan potensi alga-blooming maupun HBAs pada suatu perairan. Faktor pemicunya antara lain nutrien, arus, dan intensitas penyinaran matahari pada suatu perairan. Nutrien di perairan dapat diklasifikasikan berdasarkan Trophic Index (TRIX). Penggunaan data Global Model Ocean PISCES Biogeochemistry dapat menjadi solusi efektif, cepat, dan luas dalam memonitoring nutrien perairan. Selat Sunda dipilih sebagai area penelitian karena pada penelitian sebelumnya telah mengkonfirmasi area-area yang kaya akan nutrien. Multi korelasi Pearson digunakan pada penelitian ini untuk menentukan parameter yang paling signifikan dan berpengaruh satu sama lain. Verifikasi data nilai klorofil-a menunjukan nilai yang cukup valid dengan rata-rata RMSE (0,31) dan BIAS (-0,09). Nilai tertinggi TRIX secara klimatologi pada wilayah mulut selat merupakan wilayah eutrofik dengan nilai 6, wilayah badan selat dan dekat selatan Pulau Jawa merupakan mesotrofik dengan nilai 4,5 serta area dekat Samudra Hinda merupakan oligotrofik dengan nilai kisaran antara 0,6-2,5. Nilai TRIX area mulut Selat Sunda secara signifikan dibatasi oleh nutrien phosphat dengan korelasi Pearson (0,69) dibandingkan unsur N (-0,55). Sedangkan, pada wilayah badan selat dan selatan selat berkorelasi kuat terhadap seluruh komponen TRIX dan cenderung mengikuti pola monsun. Penelitian ini dapat sebagai pertimbangan dalam pemanfaatan model biogeokimia PISCES untuk pemetaan nilai TRIX seluruh perairan, termasuk perairan Indonesia.   Eutrophication can trigger increased biological processes and increase the potential for algal blooms and HBAs in the water column. Triggering factors include nutrients, currents, and sunlight intensity in a column of water. Nutrients in column water can be classified according to the Trophic Index (TRIX). The use of Global Model Ocean PISCES Biogeochemistry model data can be an effective, fast, and effective solution in monitoring nutrients. The Sunda Strait was chosen as the research area because previous studies have confirmed nutrient-rich areas. Pearson's multi-correlation was used in this study to determine the most significant parameters that influence each other. Verification of chlorophyll-a values showed validity with an average RMSE (0.31) and BIAS (-0.09). The highest climatological TRIX value in the mouth of the strait is eutrophic with a value of 6, the area of the strait and near the south of Java Island is mesotrophic with a value of 4.5 and the nearby Hinda Ocean area is oligotrophic with a value range between 0.6-2.5. The TRIX value of the mouth of the Sunda Strait is significantly limited by the nutrient phosphate with a Pearson correlation (0.69) compared to the element N (-0.55). Meanwhile, in the region of the strait channel and south of the strait, all TRIX components are strongly correlated and tend to follow the monsoon pattern. This research can be considered in the use of the PISCES biogeochemical model for mapping TRIX values throughout Indonesian waters.

oai:ojs.ejournal.undip.ac.id:article/34299 2021-02-01T08:06:55Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/34299 2021-02-01T08:06:55Z Buletin Oseanografi Marina Vol 10, No 1 (2021): Buletin Oseanografi Marina; 75-87 Putra, Tri Widya Laksana; Departement of Marine Science, Universitas Diponegoro Zainuri, Muhammad; Departemen Oseaongrafi, Universitas Diponegoro Sugianto, Denny Nugroho; Departemen Oseaongrafi, Universitas Diponegoro 2021-02-01 10:08:11 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/34299 Pulau Panjang; Penjalaran gelombang; Pemodelan numerik id Pulau Panjang terletak di sebelah barat pantai Kota Jepara memiliki luas wilayah teritorial 30 Ha dan dimanfaatan sebagai wisata pulau, wisata ziarah, dan lokasi penangkapan ikan. Kombinasi kondisi gelombang ekstrim dan air pasang mengakibatkan tekanan kuat di pesisir Pulau Panjang sehingga menimbulkan kerusakan pada fasilitas wisata. Berdasarkan hal tersebut, diperlukan adanya analisis mengenai karakteristik penjalaran gelombang laut untuk menunjang segala jenis kegiatan masyarakat. Analisis penjalaran gelombang dilakukan melalui pendekatan pemodelan numerik hidrodinamika dua dimensi (two-dimensional hydrodynamic model). Data primer yang digunakan adalah data pengukuran langsung nilai gelombang menggunakan instrument Acoustic Doppler Current Profiler dan pengukuran langsung data batimetri menggunakan instrument single-beam echosounder. Data sekunder meliputi data angin (1999 – 2019) yang didapatkan dari portal unduh data di www.ogimet.com, data pasang surut BMKG dan data batimetri dari Badan Informasi Geospasial. Tinggi gelombang signifikan (Hs) dan periode signifikan (Ts) didapatkan dari konversi data angin menjadi nilai Hs dan Ts dengan metode DNS. Nilai Hs dan Ts maksimal setiap arah mata angin mmenjadi input perhitungan model hidrdodinamika. Hasil spasial penjalaran gelombang tertinggi terjadi pada arah datang gelombang dari arah timur laut, tenggara dan barat.  Penjalaran gelombang di Pulau Panjang menciptakan daerah terlindung di sisi seberang dari arah datang gelombang dan saat gelombang endekati pantai penjalaran gelombang mengikuti kontur garis pantai diikuti dengan melemahnya kecepatan rambat gelombang. Panjang Island is located on the west coast of Jepara City and has a territorial area of 30 hectares and is used as island tourism, pilgrimage tours, and fishing locations. The combination of extreme wave conditions and high tide resulted in strong force on the coast of Panjang Island causing damage to tourist facilities. Based on this, it is necessary to have an characteristics analysis of the sea waves propagation to support all types of community activities. Analysis of the propagation of the waves was carried out using a two-dimensional hydrodynamic model approach. The primary data used are direct measurement data of wave values using the Acoustic Doppler Current Profiler instrument and direct measurement of bathymetric data using a single-beam echosounder instrument. Secondary data includes wind data (1999 - 2019) obtained from the data download portal at www.ogimet.com, BMKG tidal data and bathymetry data from the Geospatial Information Agency. Significant wave height (Hs) and significant period (Ts) are obtained from the conversion of wind data into Hs and Ts values using the DNS method. The maximum Hs and Ts values for each cardinal direction are the input for calculating the hydrodynamic model. The highest spatial results of wave propagation occur in the coming direction of waves from the northeast, southeast and west. The wave propagation in Panjang Island creates a protected area on the opposite side from the direction of the waves coming and when the waves approach the coast the propagation of the waves follow the contours of the coastline followed by a weakening of the wave propagation speed.

oai:ojs.ejournal.undip.ac.id:article/62113 2024-11-04T07:16:45Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/62113 2024-11-04T07:16:45Z Buletin Oseanografi Marina Vol 13, No 3 (2024): Buletin Oseanografi Marina; 363-374 Alamsyah, Febri; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Trunojoyo Madura Nugraha, Wahyu Andy; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Trunojoyo Madura Insafitri, Insafitri; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Trunojoyo Madura 2024-10-30 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/62113 Coral reef; UPT; Gili Labak; Gili Genting; lifeform; Acropora id Pulau yang memiliki terumbu karang di kabupaten Sumenep adalah Pulau Gili Labak dan Pulau Gili Genting. Belum ada yang penelitian yang menganalisis struktur komunitas dan persentase tutupan terumbu karang dengan menggunakan metode UPT di Gili Labak dan Gili Genting. Penelitian ini dilaksanakan pada bulan Agustus 2023 menggunakan metode Underwater Photo Transect (UPT). Hasil penelitian menunjukkan Gili Labak mendapatkan persentase penutupan 73,25% dan Gili Genting 55,37% dikategorikan baik. Karang Acropora yang mendominasi di Gili Labak adalah jenis Acropora Digitate sebesar 23,87% dan non-Acropora yang mendominasi adalah Coral Foliose sebesar 6,8%. Karang Acropora yang mendominasi di Gili Genting adalah Acropora Branching sebesar 34,69% dan non-Acropora yang mendominasi adalah Coral Massive sebesar 7%. Gili Labak memiliki 10 genus yaitu Pavona sp., Pachyceris sp., Pacillopora sp., Acropora sp., Montipora sp., Porites sp., Stylophora sp., Favia sp., Oxypora sp. dan Fungia sp. Gili Genting memiliki 8 genus yaitu Seriatopora sp., Pacillopora sp., Acropora sp., Montipora sp., Porites sp., Stylophora sp., Pavia sp. dan Fungia sp. Indeks keanekaragaman di Gili Labak 1,51 dan Gili Genting 1,42 dikategorikan sedang. Indeks keseragaman di pulau Gili Labak 0,65 dan Gili Genting 0,68 dikategorikan tinggi. Indeks dominansi di Gili labak 0,34 dan Gili Genting 0,35 dikategorikan rendah.  The islands that have coral reefs in the Sumenep district are Gili Labak Island and Gili Genting Island. No research has yet analysed the community structure and percentage of coral reef cover using the UPT method in Gili Labak and Gili Genting. This research was conducted in August 2023 using the Underwater Photo Transect (UPT) method. The results showed that Gili Labak and Gili Genting have good condition of coral reef which high life coral coverage 73.25% 55.37% respectively. Acropora digitate are dominate coral life form in Gili Labak (23.87%) while foliose corals, non-acroporids, are abundant which has coverage 23.87%. The dominating Acropora coral in Gili Genting is Acropora Branching by 34.69% and the dominating non-Acropora is Coral Massive by 7%. Gili Labak has 10 genera namely Pavona sp., Pachyceris sp., Pacillopora sp., Acropora sp., Montipora sp., Porites sp., Stylophora sp., Favia sp., Oxypora sp. and Fungia sp. Gili Genting has 8 genera namely Seriatopora sp., Pacillopora sp., Acropora sp., Montipora sp., Porites sp., Stylophora sp., Pavia sp. and Fungia sp. The diversity index in Gili Labak 1.51 and Gili Genting 1.42 is categorised as medium. The uniformity index on the islands of Gili Labak 0.65 and Gili Genting 0.68 is categorised as high. The dominance index in Gili Labak 0.34 and Gili Genting 0.35 is categorised as low.

oai:ojs.ejournal.undip.ac.id:article/11294 2020-04-17T12:01:46Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/11294 2020-04-17T12:01:46Z Buletin Oseanografi Marina Vol 5, No 1 (2016): Buletin Oseanografi Marina; 38-43 Saputra, Angga Dwi; Program Studi Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Setiyono, Heryoso; Program Studi Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Saputro, Agus Anugroho Dwi; Program Studi Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2016-04-03 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/11294 en Perairan Karangsong adalah wilayah pesisir di Kabupaten Indramayu  dan merupakan kawasan penting bagi perekonomian masyarakat setempat. Adanya rencana pengembangan serta perawatan infrastruktur di wilayah Pesisir Karangsong secara berkelanjutan diperlukan adanya penelitian mengenai batimetri, kelerengan perairan dan sedimen dasar. Tujuan dari penelitian adalah untuk mengetahui kedalaman perairan, profil perairan, kelerengan serta jenis sedimen dasar di Perairan Karangsong. Metode yang digunakan dalam penelitian adalah metode kuantitatif. Metode pengambilan data kedalaman dan sedimen dasar dilakukan di wilayah yang dianggap mewakili kerakteristik wilayah seluruhnya. Hasil penelitian menunjukkan kedalaman Perairan Karangsong, Kabupaten Indramayu berkisar antara 1 meter sampai 11 meter dengan nilai kelerengan berkisar antara 0,250◦ hingga 0,277◦ dengan rata-rata kelerengan adalah hampir datar. Perairan Karangsong, Kabupaten Indramayu memiliki tipe pasang surut campuran condong harian ganda dengan nilai nilai Formzahl sebesar 0,57. nilai-nilai elevasi Perairan Karangsong meliputi MSL 64 cm, HHWL 118,9 cm, LLWL 9,19 cm, LWL 10 cm dan HWL 110 cm. Jenis Sedimen Dasar di Perairan Karangsong, Kabupaten Indramayu adalah pasir (silt) dan pasir lanauan (silty sand). Kata kunci: Batimetri, Sedimen Dasar, Kelerengan, Perairan Karangsong.  

oai:ojs.ejournal.undip.ac.id:article/37143 2022-05-20T01:15:04Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/37143 2022-05-20T01:15:04Z Buletin Oseanografi Marina Vol 11, No 1 (2022): Buletin Oseanografi Marina; 71-76 Agristiyani, Nurvita; Departemen Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan., Universitas Diponegoro Suprijanto, Jusup; Departemen Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan., Universitas Diponegoro Ario, Raden; Departemen Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan., Universitas Diponegoro 2022-01-30 16:19:37 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/37143 Anadara granosa; Logam Berat; Penilaian Risiko Kesehatan Manusia; Semarang; embaga id Kerang Darah (Anadara granosa) merupakan salah satu komoditas laut yang dihasilkan di Perairan Semarang. Lokasi tersebut diperkirakan telah menerima zat pencemar yang berasal dari limbah kota. Penelitian ini bertujuan untuk mengetahui kandungan logam berat Tembaga atau Cu (Cuprum) dan batas maksimal aman konsumsi mingguan jaringan lunak A. granosa yang diperoleh di Perairan Laut Semarang yang didaratkan di Tambak Lorok Semarang. Penelitian ini dilakukan dengan pengambilan sampel pada bulan Maret, April, Juni dan Juli 2020. Konsentrasi logam berat Cu dianalisis menggunakan ICP (Inductively Coupled Plasma) dan penetapan batas maksimal aman konsumsi dihitung menggunakan rumus EDI (Estimated Daily Intake) serta penilaian tingkat risiko menggunakan rumus THQ (Target Hazard Quotient). Hasil kandungan logam berat Cu pada jaringan lunak A. granosa di bulan Maret, April, Juni dan Juli 2020 masing-masing sebesar 0,705 mg/kg; 1,628 mg/kg; 2,209 mg/kg dan 1,149 mg/kg yang menunjukan bahwa kandungan logam berat Cu tidak melebihi ambang batas berdasarkan SK Depkes RI No.03725/B/SK/1989. Estimasi asupan harian (EDI) terhadap logam Cu di bulan Maret, April, Juni dan Juli 2020 yaitu sebesar 1,65 µg/kg/hari; 3,80 µg/kg/hari; 5,15 µg/kg/hari dan 2,68 µg/kg/hari yang menunjukkan bahwa dosis paparan Cu tergolong aman bagi konsumen A. granosa. Sedangkan penilaian tingkat risiko (THQ) untuk logam Cu menunjukkan hasil lebih kecil satu dengan nilai rata-rata 0,03 sehingga dapat dikatakan konsentrasi logam Cu tersebut tidak berpotensi menimbulkan efek non-karsinogenik pada manusia.  Blood Cockle (A. granosa) is one of the marine commodities produced in Semarang waters. The location is thought to have received pollutants from municipal waste. This study aims to determine the content of heavy metal Cu in A. granosa cockle obtained in Semarang sea waters which landed at Tambak Lorok Semarang. This research was conducted with sampling in March, April, June and July 2020. The concentration of heavy metal copper (Cu) was analyzed using ICP (Inductively Coupled Plasma) and the determination of the maximum safe consumption limit was calculated using the EDI (Estimated Daily Intake) formula and risk level assessment was calculated using the THQ (Target Hazard Quotient) formula. The results of heavy metal Cu content in A. granosa cockles in March, April, June and July 2020 were 0,705 mg/kg; 1,628 mg/kg; 2,209 mg/kg and 1,149 mg/kg, which indicates that the heavy metal content of Cu does not exceed the threshold based on the Decree of the Ministry of Health RI No.03725/B/SK/1989. Estimated Daily Intake (EDI) of Cu in March, April, June and July 2020 is 1,65 µg/kg/day; 3,80 µg/kg/day; 5,15 µg/kg/day and 2,68 µg/kg/day which indicate that the dose of Cu exposure is safe for A. granosa consumers. Meanwhile, the results of the risk level assessment (THQ) for Cu metal is >1 which indicates that the concentration of Cu metal does not have the potential to cause non-carcinogenic effects in humans.

oai:ojs.ejournal.undip.ac.id:article/69313 2026-02-11T04:49:13Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/69313 2026-02-11T04:49:13Z Buletin Oseanografi Marina Vol 14, No 2 (2025): Buletin Oseanografi Marina; 231-240 Nurjanah, Siti; Program Studi Pendidikan Kelautan dan Perikanan, Universitas Pendidikan Indonesia Nazwasyawinka, Keyla; Program Studi Pendidikan Kelautan dan Perikanan, Universitas Pendidikan Indonesia Abrar, Camelia Batun; Program Studi Geofisika, Fakultas Fisika, Universitas Bengkulu Nasution, Isra Amalia; Program Studi Geofisika, Fakultas Fisika, Universitas Bengkulu Dida, Eki Naidania; Pusat Riset Sumber Daya Geologi, Badan Riset Inovasi dan Nasional Sasongko, Agung Setyo; Program Studi Pendidikan Kelautan dan Perikanan, Universitas Pendidikan Indonesia Widiyanto, Kukuh; Program Studi Pendidikan Kelautan dan Perikanan, Universitas Pendidikan Indonesia Cahyarini, Sri Yudawati; Pusat Riset Iklim dan Atmosfer, Badan Riset Inovasi dan Nasional 2025-06-10 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/69313 Logam berat; Besi; Sedimen; Pulau Kalih Selatan id Pulau Kalih Selatan terletak di sebelah barat laut Teluk Banten yang berdekatan dengan kawasan industri dan daerah penangkapan ikan menggunakan Keramba Jaring Apung (KJA). Pulau ini memiliki keanekaragaman hayati seperti ekosistem mangrove, terumbu karang, dan lamun. Kawasan Industri di sekitar pulau dapat berdampak pada ekosistem perairan salah satunya pencemaran logam berat besi. Penelitian ini bertujuan untuk mengidentifikasi kandungan logam berat besi (Fe) yang terakumulasi pada sedimen di Pulau Kalih Selatan. Sampel sedimen dikumpulkan dari lima stasiun menggunakan metode purposive random sampling. Logam Berat Fe dianalisis di Laboratorium Kimia BRIN KST Samaun Samadikun menggunakan metode Flame Atomic Absorption Spectrophotometer (FAAS). Hasil yang diperoleh dari analisis logam berat Fe menunjukan sedimen di Pulau Kalih Banten memiliki konsentrasi logam berat Fe antara 1.771 mg/kg hingga 41.455 mg/kg, dengan nilai rata-rata 11.144 mg/kg. Kandungan Fe dalam sedimen di hampir seluruh titik lokasi pengambilan sampel berada di bawah baku mutu dari Guidelines for the Protection and Management of Aquatic Sediment Quality in Ontario, hal ini diduga logam berat Fe yang terdapat pada perairan mengalami pengenceran dan sebagian terbawa menuju ke laut lepas yang dipengaruhi gelombang dan arus yang dapat menyebarkan kandungan Fe di semua stasiun nilainya lebih kecil dari baku mutu.   South Kalih Island is located in the northwestern part of Banten Bay, adjacent to an industrial area and a fishing area using floating net cages (KJA). The island has biodiversity such as mangroves, coral reefs, and seagrasses. Industrial areas around the island can have an impact on aquatic ecosystems, one of which is heavy metal iron pollution. This study aims to identify the content of heavy metal iron (Fe) accumulated in sediments on South Kalih Island. Sediment samples were collected from five stations using purposive random sampling method. Fe heavy metals were analyzed at the BRIN KST Samaun Samadikun Chemistry Laboratory using the Flame Atomic Absorption Spectrophotometer (FAAS) method. The results obtained from the Fe heavy metal analysis showed that sediments in Kalih Island Banten had Fe heavy metal concentrations between 1,771 mg/kg to 41,455 mg/kg, with an average value of 11,144 mg/kg. The Fe content in sediments at almost all points of the sampling location is below the quality standards of the Guidelines for the Protection and Management of Aquatic Sediment Quality in Ontario, this is thought to be heavy metal Fe contained in the waters undergoes dilution and partially carried to the open sea which is influenced by waves and currents that can spread the Fe content at all stations the value is smaller than the quality standards. 

oai:ojs.ejournal.undip.ac.id:article/16190 2020-04-17T12:04:15Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/16190 2020-04-17T12:04:15Z Buletin Oseanografi Marina Vol 6, No 2 (2017): Buletin Oseanografi Marina; 130-133 Idiawati, Nora; Universitas Tanjungpura Sofiana, Mega Sari Juane; Universitas Tanjungpura Rousdy, Diah Wulandari; Universitas Tanjungpura 2017-11-18 00:39:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/16190 antibacterial; bacteria associated; Thalassia hemprichii, seagrass; Antibakteri; bakteri berasosiasi; Thalassia hemprichii; lamun; en Thalassia hemprichii merupakan jenis lamun yang ada di perairan Lemukutan. T. hemprichii berpotensi menghasilkan senyawa antibakteri. Penelitian ini bertujuan untuk mengetahui aktivitas antibakteri dari bakteri berasosiasi lamun T. hemprichii dari perairan Lemukutan. Hasil uji aktivitas antibakteri menunjukkan 6 dari 8 isolat bakteri berasosiasi T. hemprichii aktif terhadap bakteri uji. Aktivitas antibakteri ditunjukkan dengan terbentuknya zona bening di sekitar isolat bakteri berasosiasi T. hemprichii. Isolat bakteri LM07 menunjukkan aktivitas antibakteri yang kuat terhadap 4 bakteri uji. LM07 menunjukkan aktivitas antibakteri terhadap Staphylococcus aureus, Vibrio cholera, Pseudomonas aeruginosa dan Salmonella typhimurium. Thalassia hemprichii is a species of marine seagrass in the Lemukutan waters. It has a potency as a antibacterial source. The aim of the research was to obtained bacteria associated T. hemprichii. The result of this research showed six of eight bacterial strains have antibacterial activity. A growth inhibition zone formed as a clear zone around bacterial strains. LM07 showed the highest antibacterial activity. This bacteria inhibited the growth of S. aureus, V. cholera, P. aeruginosa dan S. typhimurium.

oai:ojs.ejournal.undip.ac.id:article/44763 2023-05-13T09:22:51Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/44763 2023-05-13T09:22:51Z Buletin Oseanografi Marina Vol 12, No 1 (2023): Buletin Oseanografi Marina; 20-26 Zainuri, Muhammad; Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian, Universitas Trunojoyo Madura Indriyawati, Novi; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Trunojoyo Madura Syarifah, Wasiqatus; Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian, Universitas Trunojoyo Madura Fitriyah, Ainul; Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian, Universitas Trunojoyo Madura 2023-02-04 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/44763 intensitas cahaya; suhu; fitoplankton id Fitoplankton merupakan mikroorganisme yang memiliki pigmen klorofil sehingga dapat melakukan fotosintesis. Dalam proses fotosintesis fitoplankton membutuhkan cahaya matahari, sehingga cahaya matahari menjadi faktor utama terhadap perkembangbiakan fitoplankton. Selain itu intensitas cahaya dapat mempengaruhi tinggi rendahnya suhu suatu perairan, sehingga suhu juga akan berpengaruh terhadap distribusi dan keberadaan fitoplankton. Penelitian ini akan menjelaskan korelasi intensitas cahaya dan suhu dengan kelimpahan fitoplakton di perairan estuari. Metode yang digunakan adalah regresi linier sederhana untuk mengetahui korelasi intensitas cahaya dan suhu terhadap kelimpahan fitoplankton. Hasil analisa data intensitas cahaya terhadap kelimpahan fitoplankton menunjukkan nilai R2 = 0,087 yang artinya bahwa kelimpahan fitoplankton dipengaruhi oleh intensitas cahaya sebesar 8,7 %, dan 91,3 % dipengaruhi oleh faktor lain. Sedangkan hasil analisa data suhu terhadap kelimpahan fitoplankton menunjukkan nilai R2= 0,016 yang artinya bahwa kelimpahan fitoplankton dipengaruhi oleh suhu sebesar 1,6 %, dan 98,4 % dipengaruhi oleh faktor lain yang salah satunya adalah intensitas cahaya matahari. Dari hasil nilai R pada penelitian dapat disimpulkan bahwa intensitas cahaya memiliki korelasi rendah terhadap kelimpahan fitoplankton dan suhu terhadap kelimpahan fitoplankton memiliki korelasi sangat rendah.    Phytoplankton are microorganisms that have chlorophyll pigments, they can carry out photosynthesis. In the process of photosynthesis, phytoplankton need sunlight, so that sunlight is the main factor in the proliferation of phytoplankton. In addition, light intensity can affect the low temperature of a waters, so that the temperature will also affect the distribution and existence of phytoplankton. This study will explain the correlation between light and temperature with phytoplankton in estuary waters. The method used is simple linear regression to determine the correlation between light and temperature on phytoplankton. The results of the analysis of light intensity data to the abundance of phytoplankton showed the value of R2 = 0.087, it’s mean that phytoplankton is influenced by light intensity by 8.7 %, and 91.3 % is influenced by other factors. While the results of analysis of temperature data to the abundance of phytoplankton showed the value of R2 = 0.016, which means that the phytoplankton is influenced by temperature by 1.6%, and 98.4% by other factors, one of which is the intensity of sunlight. From the results of the R value, it can be said that light intensity has a low correlation to the phytoplankton and temperature to the phytoplankton has a very low correlation.

oai:ojs.ejournal.undip.ac.id:article/6924 2014-05-20T05:26:04Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6924 2014-05-20T05:26:04Z Buletin Oseanografi Marina Vol 2, No 1 (2013): Buletin Oseanografi Marina; 34-40 Riniatsih, Ita; Program Studi Ilmu Kelautan – FPIK Universitas Diponegoro Endrawati, Hadi; Program Studi Ilmu Kelautan – FPIK Universitas Diponegoro 2013-01-20 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6924 en Padang lamun merupakan ekosistem yang memiliki peranan penting  bagi lingkungan  pesisir. Padang lamun rentan terhadap perubahan kondisi lingkungan perairan. Penurunan  luas padang lamun di dunia merupakan akibat  dari tekanan lingkungan baik alami maupun hasil aktivitas manusia. Transplantasi merupakan salah satu cara untuk merehabilitasi kondisi padang lamun yang mengalami kerusakan.  Tujuan dari penelitian ini untuk megetahui tingkat kelangsungan hidup dan laju pertumbuhan transplantasi lamun  Cymodecea rotundata dengan metoda jangkar di perairan Teluk Awur Jepara. Penelitian dilakukan pada bulan Juni 2010 di perairan Teluk Awur, Jepara. Metoda penelitian yang dipergunakan adalah dengan ekperimental lapangan dengan penentuan lokasi secara purposive random sampling. Penelitian dilakukan di Teluk Awur yang terbagi menjadi 3 stasiun pengamatan yang masing-masing stasiun terbagi menjadi 6 plot pengamatan.  Hasil penelitian menunjukkan bahwa pertumbuhan daun lamun tertinggi untuk lamun transplantasi terdapat pada stasiun 2 sebesar 1,86-2,61 mm/hari. Tingkat kelangsungan hidup menunjukkan 100% untuk semua lokasi. Hasil uji ANOVA Satu Arah menunukkan bahwa terdapat perbedaan yang signifikan antara laju pertumbuhan lamun alami dan lamun hasil transplantasi. Kata kunci:  pertumuhan lamun , transplantasi, Cymodocea rotundata

oai:ojs.ejournal.undip.ac.id:article/67416 2026-02-11T04:57:56Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/67416 2026-02-11T04:57:56Z Buletin Oseanografi Marina Vol 15, No 1 (2026): Buletin Oseanografi Marina; 91-104 Putri, Cintya Azahra; Program Studi Pendidikan Kelautan dan Perikanan, Universitas Pendidikan Indonesia Sasongko, Agung Setyo; Program Studi Pendidikan Kelautan dan Perikanan, Universitas Pendidikan Indonesia Yulihastin, Erma; Kelompok Riset IALVI, Pusat Riset Iklim Atmosfer, Badan Riset dan Inovasi Nasional Cahyadi, Ferry Dwi; Program Studi Pendidikan Kelautan dan Perikanan, Universitas Pendidikan Indonesia Risyanto, Risyanto; Kelompok Riset IALVI, Pusat Riset Iklim Atmosfer, Badan Riset dan Inovasi Nasional Hatmaja, Rahaden Bagas; Kelompok Riset IALVI, Pusat Riset Iklim Atmosfer, Badan Riset dan Inovasi Nasional Zehri, Sanaullah; Program Studi Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Institut Teknologi Bandung 2026-02-25 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/67416 SST; North Natuna Sea; Sumatra; Convective Clouds; Diurnal Rainfall id Penelitian ini bertujuan menganalisis pengaruh variasi suhu permukaan laut (SPL) di Laut Natuna Utara (LNU) dan distribusi temporal dan spasial pada pola curah hujan harian di daratan Sumatra Tengah selama periode El Niño pada 2018 dan 2023. Penyelidikan itu berlangsung selama tiga bulan, dari November 2023 hingga Januari 2024. Studi ini bertujuan untuk menginvestigasi perubahan dalam pola hujan diurnal yang disebabkan oleh pengaruh SPL di LNU ketika El Niño dimulai, dan distribusi konvektif di Sumatra bagian tengah. Data yang digunakan adalah data satelit dari berbagai sumber yang diproses dalam bentuk spasial, untuk melihat perubahan signifikan secara deskriptif kualitatif, yaitu data hujan dari Global Satellite Measurement of Precipitation (GSMaP) Gauge-Calibrated V6 dengan resolusi spasial 0,1 ̊ dan temporal 1 jam. Daerah Sumatra Tengah telah dianalisis lebih lanjut untuk perubahan pola hujan puncak harian, yaitu Riau dan Jambi. Riau sendiri tidak memiliki perubahan pola hujan diurnal maupun penurunan puncak sedangkan Jambi memiliki tiga variasi pada waktu penurunan intensitas hujan. Terjadinya pemanasan SPL di LNU menyebabkan perubahan pola hujan sore hari menjadi pagi hari terjadi lebih sering terutama pada periode 2023 daripada pada 2018. Pada tahun 2023, SPL di Laut Natuna Utara mendingin, meskipun begitu pengaruh musim membuat pola hujan yang dihasilkan memiliki indikasi hujan yang cukup bervariasi. Selain itu, pengaruh musim timur dan barat selama El Niño dimulai merupakan salah satu faktor utama dalam mengubah pola curah hujan harian.   The study aims to analyze the influence of sea surface temperature variations (SST) in the Northern Natuna Sea (NNS) and temporal and spatial distribution on daily rainfall patterns on the mainland of Central Sumatra during the El Niño period in 2018 and 2023. The investigation lasted for three months, from November 2023 to January 2024. The study aims to investigate changes in the diurnal rain patterns caused by the influence of SST in the NNS when El Niño began, and the convective distribution in central Sumatra. The data used is satellite data from various sources processed in spatial form, to see significant qualitatively descriptive changes, namely rainfall data from the Global Satellite Measurement of Precipitation (GSMaP) Gauge-Calibrated V6 with a space resolution of 0.1 ̊ and 1 hour temporal. The region of Central Sumatra has been further analyzed for changes in daily peak rain patterns, namely Riau and Jambi. Riau itself has no changes in diurnal rain pattern nor peak decreases while Jambi has three variations at times of decrease in rain intensity. The occurrence of SST warming in NNS caused the change of rain patterns in the afternoon to the morning occurred more often especially in the period of 2023 than in 2018. In 2023, SPL in the NNS cooled, although then the influence of the season made the resulting rain pattern have indications of rain quite varied. In addition, the influence of the eastern and western seasons during the El Niño onset was one of the key factors in changing the daily rainfall patterns.

oai:ojs.ejournal.undip.ac.id:article/23739 2020-04-17T12:08:18Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/23739 2020-04-17T12:08:18Z Buletin Oseanografi Marina Vol 8, No 2 (2019): Buletin Oseanografi Marina; 67-74 Devayani, Cantik Sitta; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Hartati, Retno; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Taufiq-Spj, Nur; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Endrawati, Hadi; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Suryono, Suryono; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2019-10-04 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/23739 Epiphytic; Microalgae; Enhalus acoroides; Karimunjawa id Padang lamun berfungsi sebagai daerah asuhan, pemijahan, tempat mencari makan dan habitat bagi biota laut, diantaranya: ikan, meiofauna, maupun mikroalga epifit. Mikroalga epifit dapat digunakan sebagai salah satu unsur indikator dalam ekosistem perairan terkait dengan kesuburan dan pencemaran. Penelitian ini bertujuan untuk mengetahui komposisi dan kelimpahan mikroalga epifit pada daun lamun Enhalus acoroides yang  dilakukan pada Oktober 2018 dengan metode diskriptif. Penentuan stasiun penelitian menggunakan metode purposive random sampling dengan tiga stasiun yaitu di perairan Pantai Nyamplungan (Stasiun 1), Pantai Bobi (Stasiun 2) dan Pelabuhan Syahbandar (Stasiun 3). Sampel daun lamun E. acoroides dipotong menjadi tiga bagian, yaitu ujung (UA dan UB), tengah (TA dan TB) dan pangkal (PA dan PB) daun. Untuk mendapatkan sampel mikroalga epifit dilakukan dengan metode pengerikan. Hasil penelitian  di semua  stasiun ditemukan tiga kelas yakni Bacillariophyceae, Dinophyceae dan Cyanophyceae. Genus yang paling banyak ditemukan adalah Navicula, Rhizosolenia, Oscillatoria, Gonyaulax dan Prorocentrum. Kelimpahan total mikroalga epifit tertinggi terdapat pada Stasiun 3 (11.234 sel/cm2) dan terendah pada Stasiun 2 (6.717 sel/cm2). Kelimpahan mikroalga epifit pada ujung daun bagian permukaan atas (UA) menghasilkan jumlah tertinggi yakni 5.682 sel/cm² dan bagian yang terendah terdapat pada posisi tengah daun bagian permukaan bawah (TB) sebanyak 3.292 sel/cm². Posisi menempel pada bagian lamun berpengaruh terhadap kelimpahan mikro alga epifit. Seagrass bed has a function as  nursery, spawning, and feeding ground, as well as a habitat for marine biota such as fish, meiofauna, and epiphytic microalgae. Epiphytic microalgae can be used as one of the indicators in aquatic ecosystems related to productivity and pollution. The aims of this study were to know the composition and abundance of epiphytic microalgae on Enhalus acoroides leaves. This research was done on October 2018 by using descriptive method. The sample was taken from three stations, ie.  Nyamplungan (Station 1), Bobi Beach (Station 2) and Syahbandar Port (Station 3). The seagrass samples of  Enhalus acoroides leaves were cut into three parts i.e. tip (UA & UB), middle (TA & TB)  and base (PA & PB) part of the leaves to obtain the samples of epiphytic microalgae by using scratching method. The results of the study found three classes, i.e.  Bacillariophyceae, Dinophyceae and Cyanophyceae. The genus most commonly found were Navicula, Rhizosolenia, Oscillatoria, Gonyaulax and Prorocentrum. The highest total abundance of epiphytic microalgae was at Station 3 (11.234 sel/cm2) and the lowest at Station 2 (6.717 sel/cm2). The abundance of  epiphytic microalgae based on different part of seagrass leaves showed that the upper surface of the leaf tip (UA) has highest abundance (5.682 cell/cm²) and the bottom surface of the middle leaf (TB) has the lowest abundance (3.292 cell/cm²). The posisiton of attachment affect on the abundance of epiphyte microalgae.

oai:ojs.ejournal.undip.ac.id:article/29543 2021-02-01T08:06:10Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/29543 2021-02-01T08:06:10Z Buletin Oseanografi Marina Vol 9, No 2 (2020): Buletin Oseanografi Marina; 166-176 Wisha, Ulung Jantama; Loka Riset Sumber Daya dan Kerentanan Pesisir, Kementerian Kelautan dan Perikanan Situmeang, Elma T.; Universitas Sriwijaya 2020-10-15 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/29543 Perpindahan massa air; suhu permukaan; Pulau Weh id Posisi Pulau Weh yang strategis membuat kawasan ini unik dalam hal karakteristik oseanografi fisik. Transfer massa air di Pulau Weh sangat signifikan yang akan berdampak pada sebaran suhu perairan di sekitar kawasan pesisir. Tujuan dari penelitian ini adalah untuk mengetahui perubahan perpindahan massa air secara vertikal dan hubungannya terhadap perubahan suhu perairan. Tiga area penting diobservasi yang mewakili utara, timur, dan selatan pulau weh yakni kawasan Iboih, Ie Meulee, dan Keunekai. Tiga ADCP diinstal pada ketiga titik observasi tersebut. Secara vertikal, komponen kecepatan arus zonal dan meridional menunjukkan kecepatan yang lebih acak saat menuju ke permukaan dengan kecepatan kurang dari 0,5 m/detik. Identifikasi pasang surut elips pada seluruh stasiun membuktikan bahwa di perairan Pulau Weh, arus pasang surut dangat dominan yang mana faktor lain juga memiliki pengaruh dalam memicu perpindahan massa air di permukaan. Arah arus dominan berputar sesuai dengan kaidah Spiral Ekman dan pengaruh gaya Coriolis. Fluktuasi suhu mengikuti perubahan elevasi pemukaan dan kecepatan arus yang berkisar antara 25-35 oC. Pada penelitian ini, menunjukkan bahwa pada bagian utara (Iboih) dan selatan (Keunekai) Pulau Weh, fluktuasi suhu berlangsung secara berlawanan menyerupai “jungkat-jungkit” yang mengindikasikan peran besar dari transfer massa air dari Laut Andaman dan Samudera Hindia yang membawa massa air hangat selama musim perlaihan I. The strategic position of Weh Island makes this region is unique in terms of physical oceanography characteristics. Water mass transport in Weh Island is tremendously significant, whereby it will affect the distribution of temperature in the surrounding coastal area. This study aimed to determine the changes in vertical water mass movement and its relation to water temperature alteration. We observed three vital areas representing north, east, and south parts of Weh Island waters, namely Iboih, Ie Meulee, and Keunekai, respectively. Three ADCPs were installed at those three observation points. Vertically, the zonal and meridional current components showed a more randomly speed surface-ward with less than 0.5 m/s magnitude. Tidal ellipses identification at all stations proved that in the Weh Island, tidal current is predominant. Other factors also trigger water mass movement on the surface. Sea current dominant direction rotated as the Ekman Spiral and Coriolis force influence. Temperature fluctuation followed the surface elevation and current speed changes ranging from 25-35 oC. In this study, it shows that between northern (Iboih) and southern (Keunekai) part of Weh Island, the temperature fluctuation oppositely takes place like a “see saw” indicating the significant role of water mass transfer from the Andaman Sea and the Indian Ocean which brings warm water during the first transitional season.

oai:ojs.ejournal.undip.ac.id:article/53955 2024-07-04T18:54:21Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/53955 2024-07-04T18:54:21Z Buletin Oseanografi Marina Vol 13, No 2 (2024): Buletin Oseanografi Marina; 261-270 Hamidah, Siti; Departemen Oseanografi, Fakultas Perikanan Ilmu Kelautan, Universitas Diponegoro Widada, Sugeng; Departemen Oseanografi, Fakultas Perikanan Ilmu Kelautan, Universitas Diponegoro Wulandari, Sri Yulina; Departemen Oseanografi, Fakultas Perikanan Ilmu Kelautan, Universitas Diponegoro Maslukah, Lilik; Departemen Oseanografi, Fakultas Perikanan Ilmu Kelautan, Universitas Diponegoro 2024-06-05 22:58:09 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/53955 Sedimen Dasar; Arus; Perairan Teluk Awur id Berbagai aktivitas manusia di Pesisir Teluk Awur yang berupa kegiatan pertambakan, pariwisata, pemukiman, pertanian dan operasional kampus pendidikan (Marine Science Teckno Park/MSTP) berpengaruh terhadap proses geomorfologi pantai dan masukan bahan pencemar ke perairan. Proses geomorfologi pantai dan sebaran bahan pencemar tersebut dipengaruh oleh sedimen yang tertranport dan terendapkan sebagai sedimen dasar. Oleh karena itu perlu dipetakan sebaran sedimen dasar di Perairan Teluk Awur tersebut yang ditetapkan sebagai tujuan dalam penelitian ini. Penelitian ini dilakukan pada Bulan Oktober 2022 dengan mengambil 30 titik sampling yang ditentukan secara semi purposive. Sampel sedimen dasar diambil dengan alat sediment grab dan dianalisis granulometri secara gravimetri. Nama sedimen ditentukan dengan metode Segitiga Shepard. Data pendukung yang digunakan dalam penelitian ini meliputi data arus (hasil model), data angin, pasang surut (Ipasoet), batimetri, dan peta Rupa Bumi Indonesia. Hasil penelitian menunjukkan sedimen dasar di Perairan Teluk Awur berupa pasir, lanau, lanau pasiran, dan lempung. Sedimen pasir mendominasi jenis sedimen yang ada dengan sebaran terutama pada area dekat dengan pantai. Hasil analisis diagram hjulstrom menunjukan bahwa sedimen ini terendapkan pada kecepatan arus 0,0044-0,18 m/s. Pada saat penelitian arus bergerak menuju laut dengan kecepatan 0,003-0,14 m/s. Hal ini mengindikasikan bahwa proses pengendapan sedimen dasar yang dijumpai sudah berlangsung sebelum pengambilan sampel sedimen dilakukan.    Various human activities on the Gulf of Awur Coast in the form of aquaculture, tourism, settlement, agriculture, and educational campus operations (Marine Science Teckno Park / MSTP) affect the coastal geomorphological process and the input of pollutants into the water. The geomorphological process of the beach and the distribution of pollutants are influenced by transported sediments and immersion as seabed sediments. Therefore, it is necessary to map the distribution of seabed sediments in the waters of Teluk Awur which is set as the goal of this study. This study was conducted in October 2022 by taking 30 semi-purposive determined sampling points. Base sediment samples were taken with a sediment grab device and gravimetrically analyzed granulometrically. The name of the sediment is determined by the Shepard Triangle method. The supporting data used in this study include current data (model results), wind data, tides (Ipasoet), bathymetry, and maps of Indonesia. The results showed bottom sediments in the waters of Teluk Awur in the form of sand, silt, sand silt, and clay. Sand sediments dominate the type of sediment that exists with distribution, especially in areas close to the coast. The results of the Hjulstrom diagram analysis show that this sediment was deposited at a current speed of 0.0044-0.18 m/s. At the time of the study, the current moved towards the sea at a speed of 0.003-0.14 m/s. This indicates that the deposition process of the bottom sediment found was already underway before sediment sampling was carried out

oai:ojs.ejournal.undip.ac.id:article/11218 2016-06-07T23:59:17Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/11218 2016-06-07T23:59:17Z Buletin Oseanografi Marina Vol 1, No 2 (2012): Buletin Oseanografi Marina; 31-39 Widada, Sugeng; Fakultas Perikanan dan Ilmu Kelautan UNDIP Rochaddi, Baskoro; Fakultas Perikanan dan Ilmu Kelautan UNDIP Endrawati, Hadi; Fakultas Perikanan dan Ilmu Kelautan UNDIP 2012-01-03 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/11218 en Kecamatan Sayung Demak merupakan daerah yang sering dilanda banjir rob. Berdasarkan kondisi morfologi dan elevasinya beberapa desa di Kecamatan Sayung yang terletak pada wilayah pantai merupakan wilyah yang paling berpotensi terkena rob. Perairan Sayung sendiri merupakan wilayah yang memiliki pola arus dengan kecenderungan berubah-ubah. Pada penelitian ini dilakukan dengan pemodelan arus dan pasang surut untuk melihat perubahan luas genangan rob yang terjadi di wilayah Sayung selama musim barat dan musim timur. Pola arus di perairan Sayung secara dominan dipengaruhi oleh pasang-surut. Hasil simulasi menunjukkan bahwa pada musim barat luas genangan banjir rob lebih besar dibanding pada musim timur. Daerah-daerah yang terkena genangan rob meliputi Sriwulan, Purwosari, Bedono, Sayung, Timbulsloko, Sidomegah, Gemuluk, dan Surodadi. Kata kunci : Sayung, rob, pemodelan

oai:ojs.ejournal.undip.ac.id:article/32345 2021-09-19T19:04:11Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/32345 2021-09-19T19:04:11Z Buletin Oseanografi Marina Vol 10, No 3 (2021): Buletin Oseanografi Marina; 299-306 Hasibuan, Erick Samuel Frederico; Departemen Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Supriyantini, Endang; Departemen Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Sunaryo, Sunaryo; Departemen Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2021-09-20 02:03:49 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/32345 TOM; BOD5; COD; Perairan Silugonggo id Perairan Silugonggo merupakan area pemukiman warga dengan banyak aktivitas perikanan dan kelautan seperti: pertambakan, industri perikanan dan merupakan alur pelayaran. Tingginya aktivitas pemukiman dan industri akan menghasilkan limbah organik dalam jumlah besar. Bahan organik yang melimpah dapat menimbulkan pencemaran lingkungan. Penelitian ini bertujuan untuk mengetahui kandungan bahan organik di perairan sungai Silugonggo, Kecamatan Juwana, Kabupaten Pati. Kandungan bahan organik diketahui melalui analisis parameter TOM (Total Organic Matter), BOD5 (Biochemical Oxygen Demand) dan COD (Chemical Oxygen Demand). Pengambilan sampel dilaksanakan pada tanggal 20 Desember 2019 dan 20 Januari 2020. Metode yang digunakan pada penelitian ini menggunakan metode kasus dengan pengamatan secara langsung di lapangan dan penentuan lokasi penelitian menggunakan metode purposive sampling. Hasil pengukuran parameter penelitian dianalisis menggunakan analisis ragam. Hasil penelitian menunjukkan bahwa nilai TOM sebesar 8,11 – 11,9 mg/L. Hasil pengukuran parameter (a) BOD5 sebesar 8,07 – 24,66 mg/L dan (b) COD sebesar 26,04 – 79,21 mg/L, hasil tersebut berada di bawah baku mutu yang ditetapkan menurut Keputusan Menteri Lingkungan Hidup No. 51 Tahun 2004 tentang Baku Mutu Air Limbah. Tingginya nilai TOM dikarenakan banyaknya masukan limbah bahan organik dari aktivitas di perairan sungai Silugonggo, seperti: pertambakan, industri perikanan, dan alur pelayaran. Silugonggo waters is a residential area with many fishery and marine activities such as: aquaculture, fishing industry and shipping lanes. High residential and industrial activities will produce large amounts of organic waste. Abundant organic matter can cause environmental pollution. This study aims to determine the content of organic matter in the waters of the Silugonggo River, Juwana District, Pati Regency. The content of organic matter is known through parameter analysis of TOM (Total Organic Matter), BOD5 (Biochemical Oxygen Demand) and COD (Chemical Oxygen Demand). Sampling was carried out on December 20, 2019 and January 20, 2020. The method used in this study used the method of direct observation in the field and the date of the research location using the purposive sampling method. The results of the measurement of research parameters were analyzed using analysis of variance. The results showed that the TOM value was 8.11–11.9 mg/L. Parameter measurement results (a) BOD5 of 8.07–24.66 mg/L and (b) COD of 26.04–79.21 mg/L, these results are below the quality standard stipulated according to the Decree of the Minister of the Environment No. 51 of 2004 concerning Wastewater Quality Standards. The high value of TOM is due to the large number of inputs of organic matter from activities in the waters of the Silugonggo river, such as: aquaculture, fishing industry, and shipping lanes.

oai:ojs.ejournal.undip.ac.id:article/69353 2026-02-11T04:53:31Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/69353 2026-02-11T04:53:31Z Buletin Oseanografi Marina Vol 14, No 1 (2025): Buletin Oseanografi Marina; 112-120 Romadhon, Romadhon; Departemen Teknologi Hasil Perikanan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Sabdono, Agus; Departemen Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Subagiyo, Subagiyo; Departemen Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Triyanto, Agus; Departemen Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Riyadi, Putut Har; Departemen Teknologi Hasil Perikanan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2025-02-20 05:07:28 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/69353 Undur-undur; Peptida; In silico; Hidrolisat protein id Undur-undur laut (Emerita spp.) telah diteliti mempunyai kandungan gizi yang tinggi. Peptida dari hewan laut berpotensi besar dalam bidang kesehatan dan aplikasi biomedis, berkat aktivitas biologisnya yang beragam, seperti antioksidan, anti-hipertensi, antimikroba, dan perlindungan terhadap penuaan kulit. Teknik analisis in silico digunakan untuk mengidentifikasi peptida bioaktif dari protein sekuen dengan metode komputasi, seperti: database, aplikasi online dan software. Penelitian ini dilakukan untuk memprediksi peptida yang berasal dari undur-undur laut (Emerita spp.) dengan analisis in silico. Tahapan analisis in silico dilakukan menggunakan database NCBI dan dilanjutkan dengan analisis melalui software BIOPEP-UWM dan Peptide Ranker. Berdasarkan hasil analisis in silico pada hidrolisat protein undur-undur laut menggunakan BIOPEP, terdapat 16 peptida dengan potensi anti-hipertensi dan 14 peptida dengan potensi anti-diabetes. Berdasarkan hasil Peptide Ranker dapat dilihat urutan nilai probabilitas peptida yaitu kategori tinggi (WL, YF, AF, AW, IF, SF, ML, WT), kategori sedang (PR, AG, IG), dan kategori rendah (DP, HL, VPL, SL, NL, DR, AH, AI, VG, AEL, NT). Sekuen peptida yang tertinggi yaitu WL (Triptofan-Leusin) yang memiliki skor 0,99 dengan fungsi sebagai anti-diabetes. Sementara itu, nilai terkecil yaitu NT (skor 0,05) yang berfungsi anti-diabetes. Berdasarkan analisis sensori menggunakan BIOPEP, sekuen peptida yang dihasilkan tersusun atas asam amino yang memiliki rasa pahit dan manis. Peptida dan asam amino yang memiliki rasa pahit di antaranya : P, F, VF, IF, VY, V, VL, VI, L, IL, dan W, sedangkan yang memilki rasa manis di antaranya : P, G, dan V.

oai:ojs.ejournal.undip.ac.id:article/15745 2020-04-17T12:04:01Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/15745 2020-04-17T12:04:01Z Buletin Oseanografi Marina Vol 6, No 1 (2017): Buletin Oseanografi Marina; 69-73 Suryono, Chrisna Adhi; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Rochaddi, Baskoro; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2017-08-28 16:35:25 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/15745 Logam berat; pesisir; sedimen; air laut; air tanah id Logam berat telah ditemukan di wilayah pesisir Tugu baik dalam sedimen laut, airtanah dan air laut di daerah pesisir Tugu Semarang.  Enam logam berat seperti (As, Hg, Cr, Pb, Cu and Fe) telah di teliti.  Secara nyata terlihat bahwa logam (As, Hg, Cr, Pb, Cu and Fe) menurun konsentrasinya dari sedimen, air laut dan airtanah, dan konsentrasi tertinggi terdapat dalam sedimen laut dan terendah terdapat pada airtanah.  Peningkatan aktifitas reklamasi, buangan air limbah baik dari industri maupun pemukiman kemungkinan menyebabkan peningkatan logam berat di wilayah pesisir Tugu Semarang. Logam berat telah ditemukan di wilayah pesisir Tugu baik dalam sedimen laut, airtanah dan air laut di daerah pesisir Tugu Semarang.  Enam logam berat seperti (As, Hg, Cr, Pb, Cu and Fe) telah di teliti.  Secara nyata terlihat bahwa logam (As, Hg, Cr, Pb, Cu and Fe) menurun konsentrasinya dari sedimen, air laut dan airtanah, dan konsentrasi tertinggi terdapat dalam sedimen laut dan terendah terdapat pada airtanah.  Peningkatan aktifitas reklamasi, buangan air limbah baik dari industri maupun pemukiman kemungkinan menyebabkan peningkatan logam berat di wilayah pesisir Tugu Semarang.

oai:ojs.ejournal.undip.ac.id:article/44719 2023-01-25T06:05:53Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/44719 2023-01-25T06:05:53Z Buletin Oseanografi Marina Vol 11, No 3 (2022): Buletin Oseanografi Marina; 306-314 Niam, Muhammad Ainun; Departemen Akuakultur, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Herawati, Vivi Endar; Departemen Akuakultur, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Samidjan, Istiyanto; Departemen Akuakultur, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Windarto, Seto; Departemen Akuakultur, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2022-10-01 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/44719 Ikan Bandeng; Sistem Informasi Geografis; Produktivitas Primer id Ikan bandeng (C. chanos) adalah jenis ikan yang mendiami daerah air payau yang banyak dibudidayakan di Indonesia dan akan dikembangkan di berbagai daerah. Ikan bandeng di Desa Tambak Bulusan sebagian besar dibudidayakan di tambak ekstensif, sistem budidaya ekstensif dilakukan tanpa adanya pemberian pakan tambahan pada ikan sehingga seluruh hidupnya memanfaatkan ketersediaan pakan alami berupa plankton dan klekap di tambak tersebut. Tujuan dari penelitian ini adalah untuk menganalisis kesesuaian lahan air untuk budidaya kolam dan menganalisis potensi produksi budidaya ikan bandeng di Desa Tambak Bulusan berdasarkan nilai ketersediaan plankton sebagai sumber pakan alami dan distribusi klorofil sebagai parameter untuk analisis produktivitas primer yang terkait dengan parameter lingkungan. Metode dalam penelitian ini menggunakan studi kasus yang terdiri dari 2 tahap, yaitu proses pengumpulan dan analisis. Pengumpulan data penelitian dilakukan langsung di 8 titik penelitian yang berbeda dan melakukan wawancara dengan petani pertanian. Data yang diperoleh kemudian diproses menggunakan ArcGis 10.8. Hasil akhir penelitian ini adalah luas tambak Desa Tambak bulusan ± 670 ha masuk dalam kategori cukup bagus (S2) dan juga masuk dalam kategori fit bersyarat (S3). Analisis nilai hasil untuk rentang produktivitas primer di kolam adalah 108-140 mgC/m3/hari, dengan hasil tersebut perairan di area penelitian menunjukkan nilai mesotrofik yaitu perairan dengan nilai sedang. Milkfish (C. chanos) is a type of fish that inhabits brackish water areas that are widely cultivated in Indonesia and will be developed in various regions. Milkfish in The Village of Tambak Bulusan are mostly cultivated in extensive ponds, extensive cultivation systems are carried out without the provision of additional feed to the fish so that the whole life takes advantage of the availability of natural feed in the form of plankton and macro algae n the pond. The purpose of this study was to analyze the suitability of water land for pond cultivation and analyze the production potential of milkfish cultivation in Bulusan Pond Village based on the value of plankton availability as a natural feed source and chlorophyll distribution as parameters for primary productivity analysis related to environmental parameters. The method in this study uses a case study consisting of 2 stages, namely the process of collection and analysis. The data collection of research was conducted directly at 8 different research points and conducted interviews with agricultural farmers. The data obtained is then processed using ArcGis 10.8. The final result of this study is the area of tambak Bulusan village pond ± 670 ha is included in the category of quite good (S2) and also included in the category of conditional fit (S3). The analysis of the value of the results for the primary productivity range in the pool is 108-140 mgC/m3/day, with the results of the waters in the research area showing mesotrophic value i.e. waters of moderate value.

oai:ojs.ejournal.undip.ac.id:article/6914 2014-05-20T03:17:35Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6914 2014-05-20T03:17:35Z Buletin Oseanografi Marina Vol 1, No 5 (2012): Buletin Oseanografi Marina; 34-40 Endrawati, Hadi; Jur. Ilmu Kelautan, Fak. Perikanan dan Ilmu Kelautan, Universitas Diponegoro Irwani, Irwani; Jur. Ilmu Kelautan, Fak. Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2012-10-10 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6914 en Keberadaan ichtyofauna terkait erat dengan fungsi ekologis wilayah Perairan Morosari, Kec. Sayung, Kab. Demak. Dampak dari rob / pasang tinggi (kenaikan muka air laut akibat pasang tinggi) adalah tergenangnya sebagian wilayah pertambakan menjadi perairan dangkal. Penelitian ini bertujuan tujuan melakukan inventarisasi berbagai jenis ikan serta kelimpahannya. Materi yang digunakan adalah ichtyofauna yang diambil di perairan pantai Perairan Morosari, Kec. Sayung, Kab. Demak. Penelitian dilakukan dengan pengambilan sampel secara langsung pada enam stasiun, dari Maret sampai dengan Oktober 2011. Sampling dilakukan bulanan, dengan mengambil waktu pasang tertinggi. Sampling biota ichtyofauna dilakukan dengan menggunakan Trap Net (Bubu) dan Lift Net. Hasil penelitian mendapatkan 15 Famili dengan 19 species ichtyofauna. Kelimpahan Total ichtyofauna berkisar diantara 607 – 1221 ekor. Jenis – jenis dan kelimpahan ichtyofauna tersebut terkait dengan siklus hidup dan strategi untuk kelangsungan hidup.   Kata kunci : Ichtyofauna, Jenis, Kelimpahan, Demak

oai:ojs.ejournal.undip.ac.id:article/68360 2025-10-18T16:34:53Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/68360 2025-10-18T16:34:53Z Buletin Oseanografi Marina Vol 14, No 3 (2025): Buletin Oseanografi Marina; 490-502 Isnaini, Isnaini; Departemen Ilmu Kelautan FakultasMatematika dan Ilmu Pengetahuan Alam, Universitas Sriwijaya Aryawati, Riris; Laboratorium Bioekologi Kelautan, Universitas Sriwijaya Susanti, Ester Mei; Laboratorium Bioekologi Kelautan, Universitas Sriwijaya Ulqodry, Tengku Zia; Laboratorium Bioekologi Kelautan, Universitas Sriwijaya Hartoni, Hartoni; Laboratorium Penginderaan Jauh dan Sistem Informasi Geografis Kelautan, Universitas Sriwijaya Surbakti, Heron; Laboratorium Oseanografi dan Instrumentasi Kelautan, Universitas Sriwijaya Fauziyah, Fauziyah; Departemen Ilmu Kelautan FakultasMatematika dan Ilmu Pengetahuan Alam, Universitas Sriwijaya 2025-10-18 15:20:06 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/68360 Biodiversitas; Kedalaman; Kelimpahan; Muara Sungai Musi; Zooplankton id Muara Sungai Musi berperan penting bagi masyarakat sekitar pinggiran sungai, karena berfungsi sebagai tempat untuk mencari ikan, sebagai sarana jalur transportasi di perairan. Adanya aktivitas tersebut berdampak pada penurunan kualitas perairan, dimana zooplankton memainkan fungsi penting pada perairan dengan mentransfer energi dari produsen utama di suatu daerah ke konsumen yang lebih tinggi di perairan ini. Tujuan dari penelitian ini adalah untuk mengetahui jenis dan komposisi zooplankton, menganalisis kelimpahan zooplankton dan menganalisis hubungan biodiversitas, kelimpahan zooplankton dengan parameter lingkungan pada kedalaman yang berbeda. Penentuan titik sampling dilakukan dengan metode random sampling sebanyak 9 stasiun pada kedalaman 0 m, 3 m dan 6 m. Pengambilan sampel zooplankton menggunakan planktonet dan pengukuran parameter perairan dilakukan secara insitu. Sampel zooplankton dilakukan analisis kelimpahan dan biodiversitas serta hubungannya terhadap parameter perairan dengan menggunakan Principal Component Analysis (PCA). Berdasarkan hasil penelitian zooplankton di muara Sungai Musi ditemukan sebanyak 50 genera terdiri dari 14 kelas dan 8 filum. Rata rata Kelimpahan zooplankton semakin dalam perairan, kelimpahan zooplankton semakin tinggi. Biodiversitas zooplankton pada kedalaman 0 m, 3 m dan 6 m memiliki keanekaragaman tergolong sedang, keseragaman zooplankton semakin dalam perairan semakin tinggi dan tidak ada jenis zooplankton yang mendominansi. Hubungan biodiversitas dan kelimpahan zooplankton dengan parameter lingkungan menunjukkan kecepatan arus, salinitas dan suhu  kelimpahan, keanekaragaman dan keseragaman zoolankton.

oai:ojs.ejournal.undip.ac.id:article/21024 2020-04-17T12:07:37Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/21024 2020-04-17T12:07:37Z Buletin Oseanografi Marina Vol 8, No 1 (2019): Buletin Oseanografi Marina; 33-36 Ariana, Ria; Program Studi Ilmu Kelautan, Universitas Sriwijaya Diansyah, Gusti; Program Studi Ilmu Kelautan, Universitas Sriwijaya Putri, Wike Ayu Eka; Program Studi Ilmu Kelautan, Universitas Sriwijaya 2019-04-19 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/21024 Estuari; Organoklorin; Pestisida; Sedimen; Upang id Pestisida adalah substansi kimia yang bersifat akumulatif dalam sedimen. Tujuan dari penelitian adalah untuk mengetahui jenis dan konsentrasi pestisida organoklorin yang terakumulasi di sedimen Muara Sungai Upang. Pengambilan sampel dilaksanakan pada bulan September 2017 di Sungai Upang hingga ke muara. Analisis sampel menggunakan metode Gas Chromatography Mass Spectrometry. Hasil penelitian menemukan pestisida organoklorin terakumulasi di dua stasiun yaitu stasiun 2 dan stasiun 5. Jenis pestisida organoklorin yang ditemukan adalah Endrin dengan konsentrasi 0,35 ppb pada stasiun 2 dan 0,41 ppb pada stasiun 5. Konsentrasi endrin yang ditemukan pada kedua stasiun tersebut telah melewati batas mutu yang diperkenankan (0,0624 ppb). Pesticides are chemical substancepotentially accumulated in sediment. The purpose of this study was to determine the type and concentration of organochlorine pesticides which are accumulated in the sediments Upang Estuary. Sampling was conducted in September 2017 along Upang River to estuary. Analysis of pesticides using Gas Chromatography Mass Spectrometry. The result of the research was obtained that organochlorine pesticides accumulated in station 2 and station 5. Type of organochlorine pesticides found was Endrin of  0.35 ppb in station 2 and 0.41 ppb in station 5. Endrin concentration found at both stations has passed the quality threshold (0.0624 ppb).

oai:ojs.ejournal.undip.ac.id:article/50156 2023-06-20T04:50:15Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/50156 2023-06-20T04:50:15Z Buletin Oseanografi Marina Vol 12, No 2 (2023): Buletin Oseanografi Marina; 261-269 Akbar, R. Nandi Fausil; Program Studi Ilmu Kelautan, Jurusan Kelautan dan Perikanan, Universitas Trunojoyo Madura Kartika, Ary Giri Dwi; Program Studi Ilmu Kelautan, Jurusan Kelautan dan Perikanan, Universitas Trunojoyo Madura Sains dan Teknologi Penggaraman, Universitas Trunojoyo Madura Pratiwi, Wiwid Sri Werdi; Program Studi Ilmu Kelautan, Jurusan Kelautan dan Perikanan, Universitas Trunojoyo Madura Sains dan Teknologi Penggaraman, Universitas Trunojoyo Madura Effendy, Makhfud; Program Studi Ilmu Kelautan, Jurusan Kelautan dan Perikanan, Universitas Trunojoyo Madura Sains dan Teknologi Penggaraman, Universitas Trunojoyo Madura 2023-06-20 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/50156 Nitrat; Nitrit; Ammonium id Perairan Padelegan merupakan wilayah perairan kompleks yang terdiri dari ekosistem mangrove, estuari, kegiatan akuakultur dan tambak garam. Kegiatan akuakultur dan produksi garam tersebut dapat mempengaruhi kualitas perairan dan kandungan nitrogen anorganik terlarut di perairan Padelegan. Penelitian ini bertujuan untuk mengkaji tentang distribusi nitrogen anorganik dan persen komposisinya pada setiap titik di perairan Padelegan. Pengambilan sampel air dilakukan di perairan Padelegan pada 9 titik. Konsentrasi nitrogen anorganik terlarut memiliki nilai tertinggi terletak di perairan peralihan di sebelah barat, dan konsentrasi terendah terdapat di laut lepas di sebelah tenggara. Persen komposisi distribusi nitrogen anorganik terlarut pada semua titik didominasi oleh kadar amonium (>80%) disusul oleh nitrat (<15%), dan nitrit (<1%). Hasil penelitian menunjukkan nitrogen anorganik terlarut tertinggi pada titik 4 sebesar 7,93 mg/L dan kandungan terendah pada titik 8 sebesar 6,432 mg/L. Berdasarkan hasil tersebut menunjukkan kadar amonium yang mendominasi dalam persen komposisi kandungan nitrogen anorganik terlarut, selanjutnya disusul oleh nitrat dan nitrit. Padelegan waters are complex waters that consist of mangrove, estuary, aquaculture and salt pond ecosystems. These aquaculture and salt production activities can affect the quality of the waters and the content of dissolved inorganic nitrogen in Padelegan waters. This study aims to examine the disorder of inorganic nitrogen and the percent composition at each point in Padelegan waters . Water sampling is carried out in Padelegan waters at 9 points. The highest value of dissolved inorganic nitrogen concentration is located in transitional waters to the west, and the lowest concentration is found in offshore waters to the southeast. Percent of the composition of dissolved inorganic nitrogen distribution at all points is dominated by ammonium content ( >80%) followed by nitrate ( <15% ), and nitrite ( <1%). The results showed the highest dissolved inorganic nitrogen at point 4 was 7.93 mg/L and the lowest content at point 8 was 6.432 mg/L. Based on these results, it puts ammonium levels dominating in percent composition of dissolved inorganic nitrogen content, its cells are overtaken by nitrates and nitrites.

oai:ojs.ejournal.undip.ac.id:article/6950 2014-05-22T08:18:12Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6950 2014-05-22T08:18:12Z Buletin Oseanografi Marina Vol 2, No 3 (2013): Buletin Oseanografi Marina; 48-55 Rochaddi, Baskoro; Jurusan Ilmu Kelautan Universitas Diponegoro Suryono, Chrisna Adhi; Jurusan Ilmu Kelautan Universitas Diponegoro 2013-07-22 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6950 en Senyawa pestisida merupaka senyawa persisten yang sangat sulit diuraikan dan akan terakumulasi dalam lemak suatu organisme.  Tujuan dari penelitian ini adalah untuk mengetahui keberadaan senyawa pestisida dan keterkainya dengan keanekaragaman makrozoobenthos di perairan Mlonggo Jepara.  Metode survey digunakan dalam penelitian ini dengan mengambil 3 lokasi titik sampling dan ulangan sebanyak 4 kali.  Hasil penelitian menunjukan daerah muara sungai (stasiun II) menunjukan kandungan pestisida yang lebih tinggi dan keanekaragaman hewan makrozoobenthos yang rendah bila dibandingkan dengan stasiun I (perairan sungai) dan stasiun III (perairan laut). Kata kunci: Pestisida, akumulasi dan makrozoobenthos

oai:ojs.ejournal.undip.ac.id:article/30039 2021-02-01T08:06:13Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/30039 2021-02-01T08:06:13Z Buletin Oseanografi Marina Vol 9, No 2 (2020): Buletin Oseanografi Marina; 104-116 Nugraha, Faishal Widiaputra; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Pribadi, Rudhi; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Wirasatriya, Anindya; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2020-10-15 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/30039 Areas; Carbon Stock; Mangrove; Kaliwlingi id Ekosistem mangrove memiliki potensi besar dalam penyerapan CO2 dari atmosfer. Jumlah kadar CO2 yang tersimpan pada ekosistem mangrove semakin berkurang seiring menyusutnya luasan ekosistem mangrove tersebut. Ekosistem mangrove Kabupaten Brebes diduga telah mengalami perubahan luasan sehingga berpengaruh terhadap jumlah CO2 yang terserap. Penelitian ini bertujuan untuk mengetahui perubahan luasan dan prediksi simpanan karbon ekosistem mangrove di Desa Kaliwlingi, Kabupaten Brebes. Penelitian ini dilakukan pada bulan Mei 2019 dengan menggunakan metode deskriptif. Citra yang digunakan adalah citra satelit Landsat tahun 1996, 2000, 2007, 2010, 2015, dan 2019. Pengolahan citra dilakukan dengan bantuan software Er Mapper 7.0 dan Arcmap 10.4.1. Tahapan identifikasi mangrove menggunakan komposit band RGB 564, kemudian dilakukan pemisahan obyek mangrove dan non mangrove dengan menggunakan metode unsupervised classification. Metode analisis kerapatan mangrove yang digunakan adalah algoritma NDVI. Perhitungan nilai kandungan biomassa berdasarkan rumus allometrik tiap spesies. Perubahan luasan ekosistem mangrove di Desa Kaliwlingi, Kabupaten Brebes tahun 1996 - 2019 berturut-turut adalah 51,84 ha, 114,30 ha, 43,29 ha, 163,62 ha, 286,38 ha dan 475,65 ha. Sedangkan prediksi nilai simpanan karbon total adalah ± 689,57 ton, ± 1474,18 ton, ± 541,07 ton, ± 2612,17 ton, ± 4324,36 ton, dan ± 6778,30 ton. Nilai simpanan karbon total pada ekosistem mangrove di Desa Kaliwlingi, Kabupaten Brebes meningkat seiring dengan bertambahnya luasan ekosistem mangrove tersebut.  Mangrove ecosystems have great potential in absorbing CO2 from the atmosphere. The amount of CO2 stored in the mangrove ecosystem decreases as the area of the mangrove ecosystem shrinks. The mangrove ecosystem area of Brebes Regency was justified decreased as well as the CO2 absorption. This study aims to determine changes in the extent and predictions of carbon stock of mangrove ecosystems in Kaliwlingi village, Brebes Regency. This research was conducted in May 2019 using descriptive methods. The imagery used was Landsat satellite imagery in 1996, 2000, 2007, 2010, 2015 and 2019. Image processing was carried out with the help of Er Mapper 7.0 and Arcmap 10.4.1 software. The stages of mangrove identification using the RGB 564 composite band, then the separation of mangrove and non-mangrove objects was carried out using the unsupervised classification method. The mangrove density analysis method used was the NDVI algorithm. Calculation of biomass value based on the allometric formula for each species. Changes in the extent of mangrove ecosystems in Kaliwlingi village, Brebes Regency in 1996 - 2019 were 51.84 ha, 114.30 ha, 43.29 ha, 163.62 ha, 286.38 ha and 475.65 ha, respectively. While the predicted values of total carbon stock were ± 689,57 ton, ± 1474,18 ton, ± 541,07 ton, ± 2612,17 ton, ± 4324,36 ton, dan ± 6778,30 ton. The values of total carbon stock in the mangrove ecosystem in Kaliwlingi village, Brebes Regency was increased along with the expansion of the mangrove ecosystem.

oai:ojs.ejournal.undip.ac.id:article/58680 2024-07-04T18:54:21Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/58680 2024-07-04T18:54:21Z Buletin Oseanografi Marina Vol 13, No 2 (2024): Buletin Oseanografi Marina; 271-278 Burhanis, Burhanis; Program Studi lmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Teuku Umar Alaudin, Alaudin; Program Studi lmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Teuku Umar Fadhillah, Radhi; Program Studi Akuakulur, Fakultas Perikanan dan Ilmu Kelautan, Universitas Teuku Umar Zulfadhli, Zulfadhli; Program Studi Akuakulur, Fakultas Perikanan dan Ilmu Kelautan, Universitas Teuku Umar Edwarsyah, Edwarsyah; Program Studi Sumber Daya Akuatik, Fakultas Perikanan dan Ilmu Kelautan, Universitas Teuku Umar Munandar, Roni Arif; Program Studi Sumber Daya Akuatik, Fakultas Perikanan dan Ilmu Kelautan,Universitas Teuku Umar 2024-06-05 22:58:09 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/58680 tuna sirip kuning; pertumbuhan; mortalitas; Meulaboh id Beberapa spesies ikan tuna mulai terancam ketersediaannya. Upaya untuk mewujudkan pemanfaatan yang optimal dan berkelanjutan sangat dibutuhkan, sehingga perlu dilakukan monitoring, evaluasi dan perbandingan terhadap pemanfaatan tuna sirip kuning. Tujuan penelitian untuk mengkaji dan meganalisis pola pertumbuhan dan mortalitas tuna sirip kuning di PPI Ujong Baroh. Penelitian menggunakan metode deskriptif dengan pendekatan kuantitatif. Pengamatan dan pengukuran sampel tuna sirip kuning dilakukan secara langsung dari hasil tangkapan nelayan. Selanjutnya pengumpulan data tuna sirip kuning meliputi jumlah hasil tangkapan serta pengukuran karakter morfometrik yaitu panjang cagak (FL). Hasil penelitian menunjukkan koefision ukuran panjang maksimum (L∞) yaitu sebesar 97,65 cm, dengan pendugaan panjang tuna sirip kuning pertama kali tertangkap (LC) pada ukuran panjang cagak (FL) 56,43 cm.  Nilai laju pertumbuhan (K) sebesar 0,80 pertahun, laju mortalitas total (Z) sebesar 0,26 pertahun, mortalitas alami (M) sebesar 0,76 pertahun, mortalitas penangkapan (F) sebesar -0,50 pertahun. Rata-rata ikan tuna sirip kuning yang tertangkap berukuran kecil dan belum matang gonad (Lc<Lm) dengan tingkat pertumbuhan lebih cepat serta kematian alami lebih besar dari pada penangkapan. Kegiatan penangkapan tuna sirip kuning yang di daratkan di PPI Ujong Baroh merupakan perikanan skala kecil dengan nilai eksploitasi (E) sebesar -1,94 pertahun yang tegolong under fishing berdasarkan dari nilai M (F<M).  Several species of tuna fish are starting to face threats to their availability. Efforts to achieve optimal and sustainable utilization are crucial, requiring monitoring, evaluation, and comparison of the utilization of yellowfin tuna. The research aim is to examine and analyze the growth and mortality patterns of yellowfin tuna in Ujong Baroh Fish Landing Base (PPI). The method in this research uses a descriptive method with a quantitative approach. The observation and measurement of yellowfin tuna samples are directly conducted from the fishermen's catch. Data collection of yellowfin tuna includes the quantity of catches and measurements of morphometric characteristics, specifically fork length (FL). The research results show that the maximum length coefficient (L∞) is 97,65 cm, with an estimated length at first capture at a fork length (FL) of 56,43 cm. The value of growth rate (K) of 0,80 per year, total mortality rate (Z) of 0,26 per year, natural mortality (M) of 0,76 per year, fishing mortality (F) is -0,50 per year. On average, the yellowfin tuna caught are small and immature gonads (Lc<Lm) with a faster growth rate and greater natural mortality than those caught in the fishery. The fishing activity of yellowfin tuna landed at PPI Ujong Baroh are small-scale fishery with an exploitation value (E) of -1.94 per year which is classified as under fishing based on the M value (F<M).

oai:ojs.ejournal.undip.ac.id:article/11169 2016-05-31T02:58:18Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/11169 2016-05-31T02:58:18Z Buletin Oseanografi Marina Vol 2, No 4 (2013): Buletin Oseanografi Marina; 25-31 Rifai, Aziz; Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro Ulsadriatny, Irene; Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro Maslukah, Lilik; Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro Indrayanti, Elis; Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro Sedjati, Sri; Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro Trianto, Agus; Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/11169 en Spons telah diketahui sebagai sumber bahan bioaktif dengan berbagai bioaktivitas seperti antikanker, antivirus, antibakteri dan antijamur. Potensi spons sebagai bahan bioaktif  belum banyak diteliti. Penelitian ini bertujuan untuk memperoleh data berbagai jenis spons yang berpotensi sebagai sumber bahan bioaktif anti jamur, maka dilakukan skrining terhadap Aspergillus flavus dan Candida albican. Sampel dikoleksi dari perairan Bandengan dan Empurancak, Jepara dengan  SCUBA diving dan skin diving pada bulan April 2003. Sampel selanjutnya diekstrak dengan menggunakan metanol. Uji antijamur dilakukan dengan metoda disk diffusion agar menurut Kirby-Bauer dengan konsentrasi 100, 200 dan 400 µg disk-1. Rendemen ekstrak metanol pada spons berkisar antara 0.04% sampai dengan 7.34% dari berat basahnya.  Seluruh ekstrak spons yang digunakan dalam penelitian ini dapat menghambat pertumbuhan C. albicans dan A. flavus pada konsentrasi 200 dan 400 µg disk-1. Ekstrak spons Reniera sp mempunyai bioaktivitas yang tertinggi yang ditunjukan dengan adanya zona hambat sebesar 12.58-14.93 mm terhadap C. albicans dan 6,94 -10,79 mm terhadap A. flavus pada konsentrasi uji.   Kata kunci : spons, bahan bioaktif, Aspergillus flavus, Candida albicans, ekstrak

oai:ojs.ejournal.undip.ac.id:article/32375 2021-09-19T19:04:11Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/32375 2021-09-19T19:04:11Z Buletin Oseanografi Marina Vol 10, No 3 (2021): Buletin Oseanografi Marina; 213-222 Rachma, Vira Annisa; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran Taofiqurohman, Ankiq; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran Astuty, Sri; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran Pamungkas, Wahyuniar; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran 2021-09-20 02:01:39 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/32375 Nilai Bahaya; Rip Current; Wisata; Pantai Pangandaran id Keselamatan para wisatawan adalah hal yang paling penting dalam mengelola kawasan wisata. Rip current merupakan bahaya yang signifikan bagi para pengunjung pantai dan telah memakan banyak korban di seluruh dunia. Riset ini dilakukan dengan tujuan untuk mendapatkan nilai bahaya Rip Current serta mengidentifikasi waktu yang aman untuk wisata di Pantai Pangandaran, Jawa Barat. Pelaksanaan riset berlangsung dari bulan Januari – Mei 2020. Metode riset yang digunakan adalah metode kuantitatif. Pengolahan data dan penilaian bahaya rip current berdasarkan Rip Current Hazard Assessment Guide (RNLI-UK). Parameter yang digunakan dalam riset ini adalah tinggi dan periode gelombang pecah, kecepatan jatuh sedimen, dan nilai tunggang pasut. Hasil riset menunjukan bahwa nilai bahaya rip current di Kawasan Wisata Pantai Barat Pangandaran, Jawa Barat sebesar 3 sampai dengan 4; yang dikategorikan ke dalam tingkat berbahaya sampai tingkat sangat berbahaya dengan faktor yang paling mempengaruhi adalah tinggi gelombang. Nilai bahaya rip current tertinggi (sangat berbahaya) berada di Bulan Juni hingga Oktober. Waktu yang dinilai relatif lebih aman untuk wisata berdasarkan hasil assesment nilai bahaya rip current adalah pada Bulan Januari, Februari, Maret, April, Mei, November serta Desember.The safety of tourists is the most important thing in tourism management. Rip current is a significant danger for beach visitors and has many casualties around the world. This research aims to get an index of Rip Current and identify the safety period for tourism in Pangandaran Beach. This research was conducted from January – May 2020. Methods of this research were using quantitative method. Processing data and getting an index for hazardous of Rip Current based on the Rip Current Hazard Assesment Guide (RNLI-UK). The parameters used in this research are height and period of the breaker wave, sediment fall velocity, and tide range. The result of this research are shown as an index of rip current’s hazardous 3 to 4; whereas 3 means hazardous and 4 as categorized very hazardous with the wave height as the most affecting factor. The safety periods for tourism based on the results of an index for hazardous occurs in January, February, March, April, May, November, and December.  

oai:ojs.ejournal.undip.ac.id:article/62083 2026-02-11T04:53:31Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/62083 2026-02-11T04:53:31Z Buletin Oseanografi Marina Vol 14, No 1 (2025): Buletin Oseanografi Marina; 49-60 Rahman, Rahman; Program Studi Teknologi Pengelolaan Sumberdaya Perairan, Politeknik Ahli Usaha Perikanan Bramana, Aditya; Program Studi Teknologi Pengelolaan Sumberdaya Perairan, Politeknik Ahli Usaha Perikanan Suharti, Ratna; Program Studi Teknologi Pengelolaan Sumberdaya Perairan, Politeknik Ahli Usaha Perikanan Irawan, Hendra; Program Studi Teknologi Pengelolaan Sumberdaya Perairan, Politeknik Ahli Usaha Perikanan 2025-02-20 05:07:26 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/62083 kerapatan; frekuensi; tutupan; parameter; mangrove id Kabupaten Pati terletak di pesisir utara Pulau Jawa, pantainya berlumpur dan sebagian wilayah ditumbuhi mangrove. Dari tahun ke tahun, hutan mangrove di Kabupaten Pati di beberapa kecamatan mengalami penurunan kuantitas. Penelitian ini bertujuan menganalisis vegetasi ekosistem mangrove berdasarkan faktor lingkungan perairan di Kabupaten Pati, Jawa Tengah untuk mengetahui kondisi dan struktur komunitas mangrove daerah tersebut. Penelitian ini dilaksanakan dari 21 Agustus sampai dengan 12 Oktober. Pengumpulan data yang dilakukan dengan metode observatif. Pengambilan data mangrove menggunakan metode Line Transect Plot. Berdasarkan hasil penelitian didapatkan lima jenis mangrove yaitu Avicennia marina, Rhizophora mucronata, Acanthus ilicifolius, Excoecaria agallocha, dan Sonneratia caseolaris. kerapatan jenis pohon dan semai mangrove >1500 tergolong sangat rapat serta pancang tergolong rendah-sangat rapat, frekuensi jenis pohon tertinggi ialah Avicennia marina dengan nilai 1, tutupan jenis pohon berkisar  0,292%/m2-0,623%/m2 dan INP tingkat  pohon terbesar ialah spesies Avicennia marina berkisar 246,1%-300%. Indeks biologi menunjukkan keanekaragaman mangrove stasiun penelitian berkategori rendah, keseragaman rendah-sedang, dan dominansi berkategori tinggi. Kualitas fisika dan kimia yang diukur pada tiap stasiun penelitian dikategorikan normal. Terdapat 6 spesies biota yang ditemukan yang berasosiasi yaitu Boleophthalmus boddarti, Boleophthalmus pectinirostris, Scylla serrata, Telescopium telescopium, Cerithidea cingulate dan Ellobium aurisjudae. Dari hasil penelitian tersebut, maka hutan mangrove Kabupaten Pati perlu dijaga dan dilakukan upaya-upaya dalam pelestariannya.

oai:ojs.ejournal.undip.ac.id:article/15735 2020-04-17T12:03:17Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/15735 2020-04-17T12:03:17Z Buletin Oseanografi Marina Vol 6, No 1 (2017): Buletin Oseanografi Marina; 1-8 Supriyantini, Endang; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Soenardjo, Nirwani; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Nurtania, Sabrina Arifiani; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2017-08-28 16:35:21 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/15735 Bahan Organik; Kualitas Perairan; Pusat Informasi Mangrove; Pekalongan en Rencana pengelola Pusat Informasi Mangrove (PIM) kecamatan Pekalongan, kota Pekalongan kedepannya akan dibangun area pemancingan ikan, oleh karena itu dilakukan analisis kualitas perairan sejak awal, terutama konsentrasi bahan organik yang terkandung dalam perairan tersebut. Penelitian ini bertujuan untuk mengetahui konsentrasi bahan organik pada perairan di Pusat Informasi Mangrove (PIM) Kota Pekalongan, dan untuk mengetahui tingkat pencemaran bahan organik di PIM Kota Pekalongan dengan membandingkan baku mutu yang ada. Metode yang digunakan dalam penelitian ini adalah metode deskriptif. Sampel diambil dari tiga stasiun yang ditentukan secara purposive. Untuk setiap stasiun dilakukan pengulangan pengambilan sampel sebanyak 3 kali.     Pengujian bahan organik dilakukan dengan metode kolorimetris (perbandingan menggunakan perbedaan warna). Hasil dari analisis konsentrasi BOT (Bahan Organik Total) di perairan PIM pada bulan November 2015 berkisar antara 47 – 52,72 mg/L dan mengalami penurunan pada bulan Januari 2016 berkisar antara 25,8 – 29,52 mg/L, hal ini dapat diartikan bahwa konsentrasi BOT pada bulan Januari 2016 berada di bawah baku mutu yang bernilai sebesar < 30 mg/L. Perairan PIM dapat dikatakan tercemar bahan organik dan bersifat toxic bagi biota karena konsentrasi amonia dan nitrit dari bulan November 2015 hingga Januari 2016 meningkat melebihi dari nilai baku mutu yang ada.    Mangrove Information Center (MIC) plan’s for the future is to build fishing area, therefore water quality analysis must be done since the beginning of the project, especially for the organic matter concentration in the water. This research was aimed to determine the concentration of organic matters in the Pekalongan Mangrove Information Center water and to find out the organic matter pollution at Pekalongan PIM by comparing it with existing quality standards. The method used in the research was descriptive method. Samples were taken from three stations with each of the three sampling points as the repeated purposively. Testing of organic matter carried out by the colorimetric method (comparison using color differences). The results of the analysis of the concentration of TOM (Total Organic Matter) in the water of PIM in November 2015 ranged from 47 to 52.72 mg/L and declined in January 2016 ranged from 25.8 to 29.52 mg/L, it means that the TOM concentration in January 2016 below the standard values of < 30 mg/L. If could be said that PIM waters polluted by organic matter and were toxic to biota because of  ammonia and nitrite concentration  from November 2015 until January 2016 increased above of the values of the existing quality standard.

oai:ojs.ejournal.undip.ac.id:article/42170 2022-09-07T17:08:50Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/42170 2022-09-07T17:08:50Z Buletin Oseanografi Marina Vol 11, No 2 (2022): Buletin Oseanografi Marina; 206-214 Kunarso, Kunarso; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Graharto, Surya Risky; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Wulandari, Sri Yulina; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2022-06-01 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/42170 Variabilitas upwelling; SPL; klorofil-a; angin; Selat Makassar id Selat Makassar secara geografis terletak diantara Pulau Kalimantan dan Pulau Sulawesi. Kondisi perairan di Selat Makassar dipengaruhi oleh Arus Lintas Indonesia (ARLINDO) dan sistem angin muson. Hal ini menyebabkan Selat Makassar memiliki dinamika yang kompleks dan terjadi fenomena upwelling sehingga berpengaruh terhadap variabilitas suhu permukaan laut dan klorofil-a. Kajian tentang upwelling di Selat Makassar telah banyak dilakukan, namun kajian mengenai intensitas upwelling berdasarkan variabilitas suhu permukaan laut dan klorofil-a dengan periode data dalam jangka waktu yang panjang belum dilakukan. Tujuan penelitian ini adalah untuk mengetahui variabilitas suhu permukaan laut dan klorofil-a musiman serta intensitas dan tipe upwelling di Selat Makassar. Data yang digunakan diantaranya adalah data suhu permukaan laut, klorofil-a, dan angin yang berasal dari citra Aqua MODIS Level 3 selama periode tahun 2007 hingga 2017. Data-data tersebut diolah secara klimatologi dan dianalisis dengan data pendukung berupa data angin sehingga diperoleh kesimpulan yang jelas mengenai objek yang diteliti. Berdasarkan hasil pengolahan data, variabilitas suhu permukaan laut dan klorofil-a di Selat Makassar dipengaruhi oleh angin musim. Pola pergerakan dan kecepatan angin yang tinggi diikuti dengan penurunan SPL serta peningkatan konsentrasi klorofil-a mengindikasikan fenomena upwelling terjadi di Selat Makassar bagian Selatan Pulau Sulawesi. Hal ini ditunjukkan dari tingkat korelasi kuat antara angin terhadap SPL dan klorofil-a dengan masing-masing nilai korelasi (r) -0,872 dan 0,771. Upwelling yang terjadi di Selat Makassar dimulai pada bulan Mei-Oktober dan termasuk tipe upwelling berkala. Intensitas Upwelling sangat kuat terjadi pada bulan Agustus dengan nilai SPL 26,31°C dan konsentrasi klorofil-a sebesar 2,33 mg/m3 serta mencapai puncak terluas sebesar 51.175,75 km2.  The Makassar Strait is geographically located between the islands of Kalimantan and Sulawesi. The condition of the waters in the Makassar Strait is influenced by the Indonesian Throughflow (ARLINDO) and  monsoon wind system. This causes the Makassar Strait has complex dynamics including the upwelling phenomenon that affects the variability of sea surface temperature (SST) and chlorophyll-a. There have been many studies about upwelling in the Makassar Strait, but studies on the intensity of upwelling based on the variability of sea surface temperature and chlorophyll-a with long-term data periods were absent. The purpose of this study was to determine the variability of sea surface temperature and seasonal chlorophyll-a as well as the intensity and type of upwelling in the Makassar Strait. The data used including sea surface temperature, chlorophyll-a, and wind data derived from Aqua MODIS satellite Level 3 for the period 2007 to 2017. These data are processed climatologically and analyzed with supporting data i.e., the wind data. Based on data processing results, variability of sea surface temperature and chlorophyll-a in the Makassar Strait is affected by monsoon systems. The increasing wind speed is followed by decreasing of SST and increasing of chlorophyll-a concentration indicating upwelling phenomenon in the Makassar Strait, precisely at Southern Sulawesi Island. The strong correlation between wind and SST and chlorophyll-a are demonstrated with correlation values (r) -0.872 and 0.771. Upwelling occurrence in the Makassar Strait starts from May to October and is a periodic upwelling type. The intensity of upwelling was very strong in August with an SST value of 26.31 ° C and a chlorophyll-a concentration of 2.33 mg / m3 and reached the widest area of 51,175.75 km2.

oai:ojs.ejournal.undip.ac.id:article/6905 2014-05-20T02:00:56Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6905 2014-05-20T02:00:56Z Buletin Oseanografi Marina Vol 1, No 3 (2012): Buletin Oseanografi Marina; 8-15 Supriyantini, Endang; Jurusan Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2012-04-22 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6905 en Pengetahuan tentang asupan nutrisi yang sesuai untuk Kerang Totok Polymesoda erosa sangat penting selain untuk meningkatkan kegunaan diet mikroalga juga untuk mengetahui pengaruh pemberian pakan alami Tetraselmis chuii dan Skeletonema costatum terhadap perkembangan gonad kerang Totok. Biota yang digunakan dalam penelitian ini adalah kerang Totok ukuran 3-4 cm yang diperoleh dari perairan sekitar Pulau Gombol, Segara Anakan, Cilacap. Wadah yang digunakan adalah akuarium berukuran 30 x 30 x 30 cm3 dengan volume media 2 liter. Metode yang digunakan adalah eksperimen laboratorium dengan Rancangan Acak Lengkap, 3 perlakuan, yaitu T. chuii 27 x 104 sel/ml (pakan T1); S. costatum 27 x 104 sel/ml (pakan T2); dan campuran T. chuii 13,5 x 104 sel/ml dan S. costatum 13,5 x 104 sel/ml (pakan T3). Pakan diberikan sekali sehari setiap pk. 08.00 WIB, pemeliharaan dilakukan selama 4 bulan. Pengamatan perkembangan gonad secara makroskopis dan pengukuran oosit secara mikroskopis dilakukan sebulan sekali. Hasil penelitian menunjukkan bahwa pakan campuran T. chuii dan S. costatum memberikan pengaruh baik terhadap perkembangan gonad walaupun masih dalam stadia TKG I, dan menghasilkan jumlah oosit, diameter membrane, diameter oosit dan diameter nucleus  yang berbeda nyata (p < 0.05). Kata kunci: kerang Totok P. erosa, T. chuii, S. costatum, TKG

oai:ojs.ejournal.undip.ac.id:article/75654 2025-10-18T08:20:06Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/75654 2025-10-18T08:20:06Z Buletin Oseanografi Marina Vol 14, No 3 (2025): Buletin Oseanografi Marina; 393-402 Purwiyanto, Anna Ida Sunaryo; Jurusan Ilmu Kelautan, Fakultas Matematika dan Ilmu Pengetahuan Alam, Unviersitas Sriwijaya, Palembang 30862, Indonesia Putri, Wike Ayu Eka; Jurusan Ilmu Kelautan, Fakultas Matematika dan Ilmu Pengetahuan Alam, Unviersitas Sriwijaya, Palembang 30862, Indonesia Melki, Melki; Jurusan Ilmu Kelautan, Fakultas Matematika dan Ilmu Pengetahuan Alam, Unviersitas Sriwijaya, Palembang 30862, Indonesia Barus, Beta Susanto; Jurusan Ilmu Kelautan, Fakultas Matematika dan Ilmu Pengetahuan Alam, Unviersitas Sriwijaya, Palembang 30862, Indonesia Suteja, Yulianto; Program Studi Ilmu Kelautan, Jurusan Perikanan dan Ilmu Kelautan, Fakultas Pertanian, Universitas Mataram, Kota Mataram, Nusa Tenggara Barat, Indonesia 2025-10-18 15:20:02 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/75654 Sungai Musi; Estuari; Urban Runoff; LDPE id Penelitian ini mengkaji keberadaan dan distribusi mikroplastik di muara dan sepanjang Sungai Musi di Sumatera Selatan, Indonesia—suatu kawasan yang terdampak berat oleh pencemaran industri, domestik, dan pertanian. Sampel diambil dari lima stasiun, dengan hasil menunjukkan rata-rata konsentrasi mikroplastik sebesar 33,8 partikel/m3. Konsentrasi tertinggi ditemukan di pertemuan Sungai Upang, kemungkinan akibat limpasan perkotaan dan buangan industri, sementara konsentrasi terendah terdeteksi di sekitar Jembatan Ampera dan Pulau Kemaro, di mana turbulensi air lokal dapat mendorong terjadinya sedimentasi mikroplastik. Mikroplastik yang teridentifikasi didominasi oleh fragmen (77,5%) dan serat (22,5%), dengan sebagian besar partikel berada dalam kisaran ukuran 301–500 µm. Jenis polimer yang paling dominan adalah Low-Density Polyethylene (LDPE), yang umumnya berasal dari limbah kemasan konsumen. Temuan ini menegaskan peran Sungai Musi sebagai jalur transportasi mikroplastik dari daratan menuju ekosistem laut, yang berpotensi menimbulkan risiko besar terhadap keanekaragaman hayati akuatik dan rantai makanan. Selain merusak habitat perairan, mikroplastik juga dapat menjadi media pembawa logam berat dan zat beracun lainnya, sehingga memperparah dampak ekologisnya.

oai:ojs.ejournal.undip.ac.id:article/20109 2020-04-17T12:06:33Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/20109 2020-04-17T12:06:33Z Buletin Oseanografi Marina Vol 7, No 2 (2018): Buletin Oseanografi Marina; 98-102 Ulya, Saniyatul; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Sedjati, Sri; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Yudiati, Ervia; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2018-10-08 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/20109 Kepadatan sel; kandungan protein; nitrat; pertumbuhan; S. platensis id  Spirulina platensis merupakan mikroalga hijau biru yang mengandung nutrisi protein tinggi sehingga banyak digunakan sebagai pakan alami. Pertumbuhan dan kandungan protein mikroalga dipengaruhi oleh beberapa faktor, salah satunya adalah pemberian makronutrien pada media kultur mikroalga. Penelitian ini bertujuan untuk melihat pengaruh pertumbuhan dan kandungan protein pada mikroalga S. platensis dengan pemberian konsentrasi nitrat yang berbeda. Rancangan penelitian yang digunakan adalah rancangan acak blok dengan tiga kali pengulangan. Perlakuan konsentrasi nitrat berbeda yang diberikan adalah 50 ppm, 100 ppm, dan 150 ppm. Perhitungan kepadatan dan pengukuran parameter kualitas air dilakukan setiap hari. Pemanenan dilakukan pada hari ke – empat. Kadar prorein dianalisis dengan menggunakan metode Kjedahl. Hasil penelitian pertumbuhan S. platensis menunjukkan nilai kepadatan sel S. platensis tertinggi pada hari ke – empat berada pada perlakuan C dengan konsentrasi nitrat 150 ppm (169,58 . 103 sel/mm3). Hasil analisis ANOVA menunjukkan bahwa konsentrasi nitrat berpengaruh terhadap pertumbuhan S. platensis (p < 0,05) namun perbedaan konsentrasi nitrat tidak berpengaruh pada kadar protein (p ≥ 0,05). Berdasarkan hasil penelitian dapat disimpulkan bahwa konsentrasi nitrat yang ditambahkan pada media kultur S. platensis berpengaruh terhadap pertumbuhan S. platensis namun tidak berpengaruh pada kandungan proteinnya.  Protein Content of Spirulina platensis in Different Culture Media with Nitrate (KNO3) Concentration Spirulina platensis is green-blue microalgae that contain high protein nutrient and could be used as natural food. Growth and protein content of microalgae are influenced by several factors and one of those is giving macronutrient to microalgae’s culture medium. The purpose of this research is to compare the growth and protein content of the S. platensis with different nitrate consentrations.The research design used was a completely randomized block design with three repetitions. The different nitrate concentration treatments were 50 ppm, 100 ppm and 150 ppm. Determination of density and water quality measurement parameters was done on daily basis. Spirulina platensis was harvested done on fourth day of culture. Protein levels were analyzed by Kjedahl method. The result of the S. platensis growth that the highest density on day fourth in C treatment with 150 ppm nitrate consentration (169,58 . 103 sel/mm3). The result of ANOVA analysis show that the concentration of nitrate affected on S. platensis growth (p < 0,05) but the difference of nitrate concentration wasn’t affected in protein analysis (p ≥ 0,05). Based on the result of this research, it can be concluded that the concentration of nitrate added to the S. platensis culture medium effectively and improved the growth of S. platensis but had no effect on the protein content. 

oai:ojs.ejournal.undip.ac.id:article/47793 2023-06-20T04:50:15Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/47793 2023-06-20T04:50:15Z Buletin Oseanografi Marina Vol 12, No 2 (2023): Buletin Oseanografi Marina; 164-178 Rachmansyah, Muhammad Faisal; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Pribadi, Rudhi; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Suyadi, Suyadi; Pusat Riset Ekologi dan Etnobiologi, Badan Riset dan Inovasi Nasional 2023-06-20 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/47793 Mangrove; Indeks baru; Laguna Segara Anakan; Multisektor id Mangrove merupakan ekosistem multifungsi yang menyediakan sumber daya dan berbagai jasa ekosistem yang sangat penting bagi kelangsungan mata pencaharian lokal dan ekonomi nasional. Semakin tingginya faktor antropogenik di ekosistem mangrove akhir-akhir ini, mengakibatkan kondisi lingkungan dan sumber daya sekain menurun. Hanya saja, faktor ini sering dikesampingkan dalam penilaian kesehatan ekosistem mangrove. Penelitian ini bertujuan merumuskan kriteria yang tepat dan mudah diaplikasikan dalam menentukan kondisi kesehatan ekosistem mangrove dengan mempertimbangkan parameter yang terkait dalam penilian kondisi ekosistem mangrove diantaranya parameter spasial yang mencakup indeks mangrove dan perubahan garis pantai, parameter ekologi yang terdiri dari indeks kesehatan mangrove dan kelimpahan spesies mangrove serta paremeter sosial ekonomi yang mencakup tingkat partisipasi dan pengetahuan masyarakat, dengan mengambil studi kasus di Segara Anakan, Kabupaten Cilacap. Selanjutnya, penilaian kondisi mangrove dilakukan berdasarkan total skor yang diurutkan dari 1 sampai 3 yaitu. 1 (baik), 2 (sedang), 3 (buruk). Dengan demikian, ekosistem mangrove di Kawasan Segara Anakan dapat tergolong sedang. Penebangan liar adalah penyebab utama, jadi ada perlu adanya kebijakan yang jelas yang melibatkan pemerintah dan masyarakat. Ditambah juga melimpahnya spesies invasif seperti Derris dan Acanthus di sebelah barat serta masih rendahnya pengetahuan serta partisipasi masyarakat di Kawasan Segara Anakan. Hasil ini menunjukkan perlu adanya strategi yang terpadu untuk mencegah pembalakan liar, pengelolaan spesies invasif dan ekosistem mangrove.   Mangroves are multifunctional ecosystems that provide resources and various ecosystem services that are very important for the sustainability of local livelihoods and the national economy. The increasing number of anthropogenic factors in the mangrove ecosystem lately has resulted in declining environmental conditions and resources. However, this factor is often overlooked in the assessment of the health of the mangrove ecosystem. This study aims to formulate precise and easy-to-apply criteria in determining the health condition of the mangrove ecosystem by considering the parameters related to the assessment of the condition of the mangrove ecosystem, including spatial parameters including mangrove index and shoreline change, ecological parameters consisting of mangrove health index and abundance of mangrove species. and socio-economic parameters that include the level of community participation and knowledge, taking a case study in Segara Anakan, Cilacap Regency. Furthermore, the assessment of the condition of the mangroves was carried out based on the total score which was ordered from 1 to 3 viz. 1 (good), 2 (moderate), 3 (bad). Thus, the mangrove ecosystem in the Segara Anakan area can be classified as moderate. Illegal logging is the main cause, so there needs to be a clear policy that involves the government and the community. In addition, the abundance of invasive species such as Derris and Acanthus in the west and the lack of knowledge and community participation in the Segara Anakan area. These results indicate the need for an integrated strategy to prevent illegal logging, management of invasive species and mangrove ecosystems.

oai:ojs.ejournal.undip.ac.id:article/6941 2014-05-22T02:49:28Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6941 2014-05-22T02:49:28Z Buletin Oseanografi Marina Vol 2, No 2 (2013): Buletin Oseanografi Marina; 61-67 Lisnawati, Lucy Amellia; Jurusan Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Rochaddi, Baskoro; Jurusan Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Ismunarti, Dwi Haryo; Jurusan Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2013-04-18 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6941 en Studi tipe pasang surut di Pulau Parang Kepulauan Karimunjawa Jepara Jawa Tengah telah dilakukan pada tanggal 18 September – 03 Oktober 2012. Parameter oseanografi yang diukur adalah data elevasi pasang surut selama 15 hari. Metode Admiralty digunakan untuk mengetahui tipe pasang surut. Berdasarkan hasil analisa diperoleh nilai Formzahl (F) = 2,52 sesuai dengan klasifikasi tipe pasang surut dimana nilai 1,5 < F ≤ 3 menunjukkan tipe pasang surut di Pulau Parang adalah campuran condong harian tunggal. Tunggang air yang terjadi berkisar antara 68 cm sampai dengan 150 cm dengan nilai HHWL = 157,28 cm dan LLWL = 46,52 cm. Pemodelan NAO Tide digunakan untuk memodelkan dan meramalkan selama 3 tahun (Oktober 2012- September 2015). Hasil peramalan selama bulan Oktober 2012 – September 2015 menunjukkan nilai HHWL tertinggi 155 cm pada bulan Januari 2013 dan LLWL terendah pada bulan dan tahun yang sama sebesar 46 cm.   Kata Kunci : Pasang surut, metode Admiralty, NAO Tide, Formzahl, Pulau Parang

oai:ojs.ejournal.undip.ac.id:article/54740 2024-05-31T07:50:39Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/54740 2024-05-31T07:50:39Z Buletin Oseanografi Marina Vol 13, No 1 (2024): Buletin Oseanografi Marina; 70-78 Wullur, Stenly; Department of Aquatic Management Resource, Faculty of Fisheries and Marine Science, Sam Ratulangi University Rumampuk, Natalie Detty; Department of Aquatic Management Resource, Faculty of Fisheries and Marine Science, Sam Ratulangi University Tilaar, Sandra Olivia; Department of Aquatic Management Resource, Faculty of Fisheries and Marine Science, Sam Ratulangi University Tindi, Monalisa; Department of Aquatic Management Resource, Faculty of Fisheries and Marine Science, Sam Ratulangi University Smolak, Radoslav; Department of Ecology, Faculty of Humanities and Natural Sciences, University of Presov 2024-02-06 14:07:57 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/54740 Bivalvia; COI gene; isognomon; oyster; Sulawesi en The Isognomon (Lightfoot, 1786) is a genus of oysters found in various coastal ecosystems throughout the world. Along with other bivalves, it performs significant ecological functions in marine ecosystems by providing food and habitat for fish and invertebrate habitats, filtering water, and protecting shorelines. Taxonomic classification of the Isognomon oyster can be challenging due to the varied or cryptic phenotypic characters, particularly shell characters.  In this study, two specimens with different shell characters of Isognomon oyster were collected from mangrove waters in Likupang, North Sulawesi, Indonesia, and subjected to molecular analysis to determine their identity.  The mitochondrial cytochrome C oxidase subunit I (COI) gene was utilized as a primer for this purpose, and the genetic distance and phylogenetic position of the two specimens were determined by comparing them with the GenBank database. The Basic Local Alignment Search Tool (BLAST) revealed that the two specimens were of belonged to Isognomon ephippium, with a similarity of 99.84%. The genetic distance between the two specimens was calculated using the Tamura Nei model and found to be 0.00, while the genetic distance between I. ephippium and other species in the Isognomon genus ranged from 0.00 to 0.14. The results of the Neighbor Joining (NJ) tree analyses showed that the two specimens clustered together with I. ephippium, which was divided into two distinct clades with a strong bootstrap value of 100 at the node

oai:ojs.ejournal.undip.ac.id:article/56350 2023-11-04T02:49:24Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/56350 2023-11-04T02:49:24Z Buletin Oseanografi Marina Vol 12, No 3 (2023): Buletin Oseanografi Marina; 365-378 Harsono, Gentio; Fakultas Sains dan Teknologi Pertahanan, Universitas Pertahanan Republik Indonesia Pusat Hidro-Oseanografi TNI AL Purwanto, Budi; Pusat Hidro-Oseanografi TNI AL Wirasatriya, Anindya; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Murtiana, Sri; Fakultas Sains dan Teknologi Pertahanan, Universitas Pertahanan RI Agassi, Rifqi N.; Pusat Hidro-Oseanografi TNI AL 2023-10-01 07:10:38 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/56350 Massa Air; Yo-Yo CTD; Frekuensi Brunt Vaisala; Skala Thorpe; Selat Lifamatola id Perairan Lifamatola menarik dikaji selain sebagai lintasan Arlindo juga proses percampuran massa airnya terjadi secara intensif. Tujuan penelitian ini adalah mengkaji percampuran turbulen di Perairan Lifamatola pada Maret 2009. Data salinitas, temperatur dan kedalaman diperoleh dari program Tropical Ocean Climate Study (TOCS) tahun 2009, kerjasama Badan Pengkajian Penerapan Teknologi (BPPT) dan Jamstec (Japan of Marine Science Earth and Technology) Jepang menggunakan RV. Kaiyo.  Analisis meliputi analisis skala Thorpe (LT), frekuensi Brunt Vaisala (N), disipasi energi kinetik turbulen (ε) dan estimasi nilai difusivitas eddy vertikal (KZ). Hasil  identifikasi karakteristik  massa air Samudera Pasifik,  North Pacific Intermediate Water (NPIW) pada perairan ini S-max tidak terlihat karena diduga sudah bertranformasi menjadi massa air dengan karakteristik yang baru akibat proses percampuran. Hasil perhitungan terhadap nilai frekuensi Brunt Vaisala, pada lapisan termoklin diperoleh nilai N2 tertinggi yaitu 0,05-0,15 s-1 pada kedalaman 100 m dan kedalaman 200 m, sementara lapisan tercampur berkisar 0,0- 0,01 s-1 dan lapisan dalam 0-0,005 s-1.  Lapisan termoklin memiliki nilai Td -5 m sampai 3 m, lapisan dalam berkisar -4 m sampai 5 m dan lapisan dalam berkisar -13m sampai 19 m. Nilai rata-rata disipasi energi kinetik turbulen (ε) dari semua lapisan yaitu sebesar 3.29 x 10-9 Wkg-1. Hasil dari rata-rata menunjukkan bahwa semakin bertambahnya kedalaman nilai disipasi energi kinetik turbulen (ε) semakin menurun. Nilai difusivitas paling tinggi terjadi pada lapisan termoklin dan menurun dengan semakin bertambah nya kedalaman. Nilai Kz pada lapisan permukaan antar sampling berbeda-beda, terjadi akibat Gelombang Internal dan aktivitas pasang surut.  Lifamatola waters are interesting to study apart from being the Arlindo trajectory as well as the process of intensive mixing. The aim of this research is to examine turbulent mixing in Lifamatola Waters in March 2009. Salinity, Temperature and Depth data were obtained from the Tropical Ocean Climate Study (TOCS) program in 2009, a collaboration between the Agency for the Assessment of the Application of Technology (BPPT) and Japan of Marine Science Earth and Technology  uses RV. Kaiyo. The analysis includes Thorpe scale analysis (LT), Brunt Vaisala frequency (N), turbulent kinetic energy dissipation (ε) and estimation of vertical eddy diffusivity (KZ) values. The results of identifying the characteristics of the Pacific Ocean wate mass, North Pacific Intermediate Water (NPIW) in these waters, S-max is not visible because it is thought to have been transformed into a water mass with new characteristics due to the mixing process. The results of the calculation of the Brunt Vaisala frequency value, in the thermocline layer, the highest N2 value was obtained, namely 0.05-0.15 s-1 at a depth of 100 m and a depth of 200 m, while the mixed layer ranged from 0.0-0.01 s-1 and inner layer 0-0.005 s-1. The thermocline layer has a Td value of -5 m to 3 m, the inner layer ranges from -4 m to 5 m and the inner layer ranges from -13m to 19 m. The average value of turbulent kinetic energy dissipation (ε) from all layers is 3.29 x 10-9 Wkg-1. The results of the average show that as the depth increases the dissipation value of turbulent kinetic energy (ε) decreases. The highest diffusivity value occurs in the thermocline layer and decreases with increasing depth. The Kz value in the surface layer varies between sampling, occurring due to internal waves and tidal activity.

oai:ojs.ejournal.undip.ac.id:article/34971 2021-06-08T16:31:20Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/34971 2021-06-08T16:31:20Z Buletin Oseanografi Marina Vol 10, No 2 (2021): Buletin Oseanografi Marina; 133-142 Sartimbul, Aida; Program Studi Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan, Universitas Brawijaya Agustin, Rafika Devi; Program Studi Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan, Universitas Brawijaya Saputra, Dhira Khurniawan; Program Studi Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan, Universitas Brawijaya Yona, Defri; Marine Resources Exploration and Management Research Group, Fakultas Perikanan dan Ilmu Kelautan, Universitas Brawijaya Sari, Syarifah Hikmah Julinda; Marine Resources Exploration and Management Research Group, Fakultas Perikanan dan Ilmu Kelautan, Universitas Brawijaya Iranawati, Feni; Program Studi Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan, Universitas Brawijaya Hidayati, Nurin; Marine Resources Exploration and Management Research Group, Fakultas Perikanan dan Ilmu Kelautan, Universitas Brawijaya 2021-05-22 17:24:27 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/34971 Megabentos; Geobag; mangrove; transek kuadrat; Desa Banyuurip id Berbagai upaya telah dilakukan untuk mengatasi masalah abrasi di wilayah pesisir pantai Desa Banyuurip, Gresik. Upaya yang dilakukan salah satunya adalah reboisasi mangrove, namun upaya tersebut belum efektif, sehingga salah satu solusinya adalah dengan dipasangnya geosyntheticbag (geobag), yang merupakan kantong ramah lingkungan berisi pasir yang disusun dan dapat berfungsi sebagai perangkap sedimen dan pelindung pantai. Tujuan dari penelitian ini adalah untuk mengetahui pada bulan ke berapa biota dapat tumbuh pada geosintetik dan struktur komunitas biota yang tumbuh menggunakan metode random transek. Hasil penelitian menunjukkan bahwa megabentos epifauna dapat tumbuh pada geobag pada bulan ke-4 setelah pemasangan, yang terdiri dari 3 spesies yaitu Metopograpsus sp., Ostrea edulis, dan Fistulobalanus albicostatus. Kelimpahan jenis megabentos pada bulan ke-4 rata-rata mencapai 198 individu/m2, sedangkan kelimpahan pada bulan ke-5 mencapai 259 individu/m2. Hasil perhitungan indeks struktur komunitas megabentos pada bulan ke-4 dan ke-5 secara berurutan meliputi indeks keanekaragaman (H’) bernilai 0,10 dan 0,11; indeks keseragaman (c) bernilai 0,09 dan 0,10; dan indeks dominansi bernilai 0,96 dan 0,96. Berdasarkan penelitian ini, dapat disimpulkan bahwa geobag berfungsi sebagai pencegah abrasi serta sekaligus dapat menyatu dengan media di sekitarnya sehingga diklaim ramah lingkungan, karena dapat ditumbuhi biota yang tidak mengganggu atau merubah struktur komunitas biota di wilayah tersebut. Various attempts have been made to solve the abrasion in the coastal area of Banyuurip Village, Gresik. To overcome this problem, the community planted the mangroves, but these have not been effective. One solution to this problem is to install a geosynthetic bag (geobag), which is an environmentally friendly bag that is arranged and can be function as a sediment trap. The purpose of this study was to determine when the megabenthos can grow in the geosynthetic and how the community structure grow using the quadrant random transect method. The result showed that epifaunal megabenthos could grow on geobag at the fourth month after installation, which consisted of 3 species. The abundance of megabenthos at the 4th month averaged 198 individuals/m2, while the abundance at the 5th month reached 259 individuals/m2. The structure index (H’) in January and February were 0.10 and 0.11, respectively.  The similarity index (C) were 0.09 and 0.10, and while the dominance index was 0.96 and 0.96. This study is suggested that the geobag can be function both as a deterrent to abrasion and simultaneously integrate with the surrounding media and be claim as environmentally friendly, because it can be overgrown with biota that does not disturb or change the structure of the biota community in the area.

oai:ojs.ejournal.undip.ac.id:article/63007 2024-11-04T07:16:45Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/63007 2024-11-04T07:16:45Z Buletin Oseanografi Marina Vol 13, No 3 (2024): Buletin Oseanografi Marina; 409-423 Fofied, Fernanda Gitarini; Program Studi Magister Manajemen Sumberdaya Perairan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Hartoko, Agus; Departemen Sumber Daya Akuatik, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Saputra, Suradi Wijaya; Departemen Sumber Daya Akuatik, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2024-10-30 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/63007 Cakalang; Jayapura; Klorofil-a; Suhu permukaan laut id Suhu permukaan laut dan klorofil-a merupakan parameter oseanografi yang penting untuk mengetahui keberadaan ikan cakalang dan mempermudah dalam menganalisis daerah penangkapan yang potensial. Penelitian ini menggunakan data suhu permukaan laut dan klorofil-a dari sensor Moderate Resolution Imaging Spectroradiometer (MODIS) Aqua yang diunduh pada situs resmi National Aeronautics and Space Administration (NASA), kemudian diolah menggunakan perangkat lunak Sea WIFS Data Analysis System (SeaDAS).  Tujuan dilakukan penelitian ini adalah menganalisis sebaran Suhu permukaan laut (SPL) dan konsentrasi klorofil-a di Perairan Jayapura pada Musim Timur dan Musim Barat, serta memetakan zona potensial penangkapan ikan cakalang (Katsuwonus pelamis) di Perairan Jayapura berdasarkan sebaran spasio temporal musim Timur dan musim Barat. Data SPL dan klorofil satelit diolah dari 2018-2020. Metode penelitian yang digunakan pada penelitian ini mengacu pada penelitian yaitu metode deskriptif. Data koordinat tangkapan ikan cakalang dan data citra SPL dan klorofil-a diolah dengan metoda geo-statistik gridding. Selanjutnya data spasial tangkapan ikan di overlaykan pada data spasial SPL dan klorofil-a.  SPL di perairan Jayapura bervariasi antara 28‒35°C tahun 2018-2020 Musim Timur dan Musim Barat. Variasi konsentrasi klorofil-a secara temporal rata-rata berkisar antara 0,2-0,5 mg/m³ tahun 2018-2020 Musim Timur dan Musim Barat. Tangkapan ikan cakalang berkisar antara 60-1000 Kg.  Daerah penangkapan ikan yang potensial adalah daerah yang konsentrasi klorofil-a tinggi dengan kisaran pada Musim Timur antara 0,1-0,5 mg/m³ tahun berapa 2020 Musim Timur. Klorofil pada musim Barat 2020 berkisar antara 0,3‒0,5 mg/m³. Suhu optimum untuk penangkapan ikan pada Musim Timur 2020 berkisar antara 29°C-30°C , dan Musim Barat berkisar antara 28‒30 °C. Sea surface temperature and chlorophyll-a are important oceanographic parameters to determine the presence of skipjack tuna and analyze potential fishing zones. This research uses sea surface temperature and chlorophyll-a data from the Moderate Resolution Imaging Spectroradiometer (MODIS) sensor downloaded from the National Aeronautics and Space Administration (NASA) official website and processed the data using the Sea WIFS Data Analysis System (SeaDAS) software.  The aim of this research is to analyze the distribution of sea surface temperature (SST) and chlorophyll-a concentrations in Jayapura waters during the East and West seasons, as well as to map the potential fishing zones for skipjack tuna (Katsuwonus pelamis) in Jayapura waters based on the temporal distribution of the East and West seasons. West. Satellite SST and chlorophyll data were processed from 2018-2020. The research method used in this research refers to research, namely the descriptive method. The coordinate data for skipjack tuna catches and SST and chlorophyll-a image data were processed using geo-statistical gridding methods. Next, the spatial data on fish catches is overlaid on the SST and chlorophyll-a spatial data.  SST in Jayapura waters varies between 28‒35°C in 2018-2020 East Season and West Season. The average temporal variation in chlorophyll-a concentration ranges between 0.2-0.5 mg/m³ in 2018-2020 East Season and West Season. Skipjack tuna catches range from 60-1000 kg.  Potential fishing areas are areas with high concentrations of chlorophyll-a with a range in the East Season between 0.1-0.5 mg/m³ what year is the 2020 East Season. Chlorophyll in the 2020 West season ranged from 0.3‒0.5 mg/m³. The optimum temperature for fishing in the 2020 East Season is between 29°C-30°C, and the West Season is between 28‒30°C.

oai:ojs.ejournal.undip.ac.id:article/11299 2020-04-17T12:02:24Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/11299 2020-04-17T12:02:24Z Buletin Oseanografi Marina Vol 5, No 1 (2016): Buletin Oseanografi Marina; 73-81 Suwartimah, Ken; Study progtam of Marine Science, faculty of Fisheries and Marine Science, Diponegoro University Redjeki, Sri; Study progtam of Marine Science, faculty of Fisheries and Marine Science, Diponegoro University W, R. Noer Pagripto; Study progtam of Marine Science, faculty of Fisheries and Marine Science, Diponegoro University 2016-04-03 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/11299 en Distribusi dan kelimpahan komunitas ikan karang sangat dipengaruhi oleh faktor biologis dan fisik seperti paparan gelombang, beban sedimen, kedalaman air serta kompleksitas topograhical dari substrat karang. Penelitian ini ditujukan untuk memberikan gambaran pada struktur komunitas ikan karang di Sumber Kima dan perairan Pemuteran, Buleleng, Bali Utara. Pengambilan sampel dengan transek dari 100 meter panjang garis lurus, mengikuti kontur kedalaman dan meletakkan sejajar dengan bagian depan karang. komunitas ikan karang dipelajari dengan siang hari di bawah air visual yang metode sensus transek ikan dari 100 x 5 m mendata spesies ikan dan kelimpahannya. sensus ikan dilakukan tiga kali per situs. Ikan diidentifikasi untuk tingkat spesies. Kelimpahan ikan yang dikumpulkan dari data dari lokasi pengambilan sampel dari setiap lokasi dianalisis menggunakan indeks struktur masyarakat. dari total 7.966 ikan yang disensus dari sembilan situs permanen selama periode penelitian. Ada 78 spesies milik 24 keluarga ditemukan di Pamuteran dan 65 spesies dari 24 keluarga di Sumber Kima Waters. Pomacentridae adalah keluarga yang paling melimpah di kedua lokasi pengambilan sampel terdiri dari 14 spesies di perairan Pamuteran dan 12 spesies di perairan Sumber Kima, Diikuti oleh Chaetodontidae terdiri dari 10 spesies di perairan Pamuteran dan sumber perairan Kima.Kata kunci : ikan karang, Pamuteran, Sumber Kima, Bali 

oai:ojs.ejournal.undip.ac.id:article/39567 2022-09-07T17:08:50Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/39567 2022-09-07T17:08:50Z Buletin Oseanografi Marina Vol 11, No 2 (2022): Buletin Oseanografi Marina; 123-130 Putri, Annisa Agustina Kurnia; Jurusan Ilmu Kelautan, Fakultas Matematika dan Ilmu Pengetahuan, Universitas Sriwijaya Diansyah, Gusti; Jurusan Ilmu Kelautan, Fakultas Matematika dan Ilmu Pengetahuan, Universitas Sriwijaya Putri, Wike Ayu Eka; Jurusan Ilmu Kelautan, Fakultas Matematika dan Ilmu Pengetahuan, Universitas Sriwijaya 2022-05-20 08:04:46 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/39567 Gelombang Signifikan; Model Wavewatch-III; Pantai Alau-Alau; RMSE id Perairan Pantai Alau-Alau merupakan daerah pesisir yang dimanfaatkan sebagai kegiatan pariwisata dan juga kegiatan perikanan seperti bagan perahu. Peramalan tinggi gelombang sangat berguna untuk menghindari kejadian kecelakaan kapal ataupun hantaman ombak besar di sekitar kawasan pantai. Tujuan dari penelitian ini adalah untuk menganalisis tinggi gelombang signifikan di wilayah Pantai Alau-Alau, Kalianda, Lampung Selatan dan menganalisis tingkat akurasi model Wavewatch-III BMKG (Badan Meteorologi Klimatologi dan Geofisika) dengan data lapangan. Data dari Model Wavewatch-III divisualisasi menggunakan software GrADS, lalu dibandingkan dengan data pengukuran lapangan yang dilaksanakan selama 7 hari (20-26 November 2019). RMSE (Root Mean Square Error) digunakan untuk melihat akurasi dari model tersebut. Hasil penelitian pengukuran lapangan menunjukkan tinggi gelombang signifikan di Pantai Alau-Alau berkisar 0,082-0,405 meter. Hasil tinggi gelombang signifikan hasil model Wavewatch-III berkisar 0,027–0,118 meter. Hasil nilai RMSE model Wavewatch-III terhadap data lapangan sebesar 0,28.   Alau-Alau Beach is a coastal area that used for tourism and fishery such as boat lift net. The forecast of wave height is very useful to avoid hitting big waves around coastal areas. The aims of this study are to analyze the significant wave height in the Alau-Alau Beach area, Kalianda, South Lampung and to analyze the accuracy of the Wavewatch-III BMKG (Climatology and Geophysics Meteorological Agency) with field data. Data of Wavewatch-III Model was visualized by using GrADS software, then compared it with field measurement data that was carried out for 7 days (20-26 November 2019). RMSE (Root Mean Square Error) was used in seing the accuracy of the model. The results from the field measurement showed that significant wave heights at Alau-Alau Beach ranged from 0.082 to 0.405 meters. The significant wave height from the Wavewatch-III model ranged from 0.027 to 0.118 meters. The results from the RMSE Wavewatch-III model on field data was 0.28.

oai:ojs.ejournal.undip.ac.id:article/2970 2012-04-03T02:41:37Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/2970 2012-04-03T02:41:37Z Buletin Oseanografi Marina Vol 1, No 1 (2011): Buletin Oseanografi Marina Soenardjo, Nirwani The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/2970 en Abstract                 Eucheuma cottonii (Weber van Bosse) is a marine commodity, wich need several particuliarly treatment in the enviroment due to  their cultivation.  The floating cultivation model cidaun using the net for sea grass cultivation is the preference methods to protec the thallus.             The aim of the research is to find the specific growth rate of the Euheuma cottonii at the Bantarpanjang Nusakambangan Island. The eksperiment were done from April to Mei 2004. The research eksperiment based on the randomize with factorial approach 2 x2. The amount of seed (100 gr , 150 gr) and the seagrass distance ( 1,5 m , 2 m ) were aplied as the treatment with 5 replications. The research result show that the specific growth rate reach 4,4 %  , wich justified that the cidaun floating methode can be applied as the cultivation methode.   Key Words  : Eucheuma cottonii, Cultivation, Cidaun floating metode, specific growth rate

oai:ojs.ejournal.undip.ac.id:article/70792 2026-02-11T04:49:13Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/70792 2026-02-11T04:49:13Z Buletin Oseanografi Marina Vol 14, No 2 (2025): Buletin Oseanografi Marina; 277-283 Al Faidi, Andi Siti Nur Azizah; Madrasah Aliyah Negeri 2 Kota Makassar Resky, Dwisha Aprilia; Madrasah Aliyah Negeri 2 Kota Makassar Alivaiz, A. Firdhlan; Madrasah Aliyah Negeri 2 Kota Makassar Nadjib, Almira Izzah Fawziyah; Madrasah Aliyah Negeri 2 Kota Makassar Devara, Zein Abiya; Madrasah Aliyah Negeri 2 Kota Makassar Rimantho, Dedi; Madrasah Aliyah Negeri 2 Kota Makassar 2025-06-10 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/70792 Coral Reefs; Blue Carbon; Climate Change en Climate change is one of the global environmental hazards that can threaten humans and nature. Climate change can affect changes in temperature and rainfall. This research aims to estimate how much blue carbon potential can be absorbed by coral reefs on Samalona Island, and the effect on climate change. The collection of climate data for the last five years and Live Coral data for the last four years sourced from previous studies, added with field observations to obtain Live Coral data using the quadrat transect method. The identification results showed that there were 33,22% Live Coral, 50,56% Dead Coral, 7,44% Others, 8,78% Algae. To determine the blue carbon value, by multiplying the Live Coral data by the area of Samalona Island. The results are converted into square meters and multiplied by 7,72 x 10^-5 kg/m², this is the blue carbon value of Acropora Aspera. To determine the effect, simple regression was used with SPSS software. The results found that the interpretation value of blue carbon on temperature is 0,666 and on rainfall is 0,264, which shows that the relationship between blue carbon and temperature is strong and weak on rainfall.

oai:ojs.ejournal.undip.ac.id:article/19039 2020-04-17T12:05:33Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/19039 2020-04-17T12:05:33Z Buletin Oseanografi Marina Vol 7, No 1 (2018): Buletin Oseanografi Marina; 29-36 Mauludin, Muhamad Rizky; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Azizah, Ria; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Pribadi, Rudhi; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Suryono, Suryono; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2018-05-24 17:39:40 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/19039 Mangrove; Tutupan, Kanopi; Area; Ujung Piring en Mangrove yang ada di Kawasan Ujung Piring berada di Desa Jambu, Kecamatan Mlonggo Kabupaten Jepara, merupakan salah satu kawasan hutan mangrove yang berada di Pesisir Pantai Utara Pulau Jawa. Tujuan dari penelitian ini adalah untuk menganalisis persentase tutupan kanopi mangrove di Kawasan Ujung Piring Kabupaten Jepara. Metode yang digunakan dalam penelitian ini adalah metode deskriptif. Penentuan lokasi menggunakan purposive sampling sedangkan metode penutupan mangrove menggunakan Hemispherical Photography yang merupakan suatu metode fotografi yang digunakan untuk menghitung luasan tutupan kanopi menggunakan kamera dari bawah kanopi pohon. Penelitian ini dilakukan pada bulan Januari – Februari 2017, lokasi penelitian berada di dalam Kawasan Ujung Piring di Desa Jambu Kecamatan Mlonggo, Kabupaten Jepara. Terdapat 3 lokasi yaitu Jambu (JBU), Blebak (BLB), dan Sekuro (SKU) yang terdiri dari 8 stasiun. Hasil dari penelitian ini Komposisi mangrove di Kawasan Ujung Piring Kabupaten Jepara ditemukan 23 Spesies di dalam dan diluar transek dan tutupan kanopi berkisar58,15 ± 7,75% - 80,41 ± 4,25 % dengan tutupan kanopi tertinggi terdapat di JBU 01 dengan status padat dengan tutupan 80,41 ± 4,25 % dan persentase terendah pada BLB 02 dengan tutupan 58,15 ± 7,75% dengan status sedang. Dari 8 stasiun, persentase tutupan yang berstatus sedang lebih mendominasi dibandingkan status yang lain. Mangrove in Ujung Piring area located in Jambu Village, Mlonggo Sub-district of Jepara Regency, is one of the mangrove forest area located in the North Coast of Java Island. The purpose of this research is to analyze the percentage of mangrove canopy area in Ujung Piring area of Jepara regency. The method used in this research is descriptive method. Determination of location using purposive sampling while mangrove canopy are was using Hemispherical Photography method which is aimed to calculate the area of canopy area using camera from under canopy of tree. This research was conducted in January – February 2017, the research location is inside Ujung Piring Area in Jambu Village Mlonggo Sub-district, Jepara Regency. There are 3 locations namely Jambu (JBU), Blebak (BLB), and Sekuro (SKU) consisting of 8 stations. Result of this research Mangrove composition in Ujung Piring area Jepara regency found 23 species inside and outside transect and canopy range of 58,15 ± 7,75% - 80,41 ± 4,25 % with the highest canopy cover found on JBU 01 with solid status with 80,41 ± 4,25% cover and the lowest percentage in the BLB 02 with a cover of 58,15 ± 7,75% with medium status. Of the 8 stations, the percentage of cover that status is more dominant than other status.

oai:ojs.ejournal.undip.ac.id:article/45438 2023-05-13T09:22:51Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/45438 2023-05-13T09:22:51Z Buletin Oseanografi Marina Vol 12, No 1 (2023): Buletin Oseanografi Marina; 65-77 Tarya, Ayi; Program Studi Oseanografi, Fakultas Ilmu dan Teknologi Kebumian, Institut Teknologi Bandung Maulamulki, Harish H.; Program Studi Oseanografi, Fakultas Ilmu dan Teknologi Kebumian, Institut Teknologi Bandung Radjawane, Ivonne M.; Program Studi Oseanografi, Fakultas Ilmu dan Teknologi Kebumian, Institut Teknologi Bandung Sutiyoso, Hanif S.; Program Studi Oseanografi, Fakultas Ilmu dan Teknologi Kebumian, Institut Teknologi Bandung 2023-02-04 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/45438 Kecepatan; Pasang Surut; Persamaan Parabolik id Profil kecepatan arus melintang pada aliran sungai merupakan parameter penting yang diperoleh dalam pengukuran debit sungai dengan instrumen Horizontal Acoustic Doppler Current Profiler (H‐ADCP). Dinamika sirkulasi arus di aliran sungai dibangkitkan oleh interaksi antara debit sungai, topografi dan pasang surut. Sungai Berau di Kalimantan Timur merupakan salah satu aliran sungai yang dominan dipengaruhi oleh pasang surut. Penelitian ini bertujuan untuk mengetahui pengaruh pasang surut terhadap variasi profil kecepatan arus melintang sungai dan identifikasi tingkat kecocokan antara profil data kecepatan arus dengan persamaan parabolik. Metode penelitian yang digunakan yaitu dekomposisi kecepatan arus dengan band pass filter (BPF) dan low pass filter (LPF), dan pencocokan kurva (curve fitting) profil kecepatan arus sungai hasil pengukuran H-ADCP dengan persamaan parabolik. Hasil studi menunjukkan pasang surut berperan dalam menentukan arah kecepatan arus, dimana arus bergerak ke arah hulu saat kondisi pasang dan bergerak menuju ke hilir saat kondisi surut, dengan magnitudo kecepatan arus saat purnama mencapai 1,2 m/s dan saat perbani sekitar 0,5 m/s. Pasang surut mempunyai pengaruh yang signifikan terhadap kontribusi kecepatan arus, berdasarkan hasil BPF diperoleh 85% dari kecepatan arus total adalah arus yang dibangkitkan oleh pasang surut, sedangkan arus non-pasang surut berkontribusi hanya 15%. Hasil pencocokan kurva antara profil kecepatan arus dan persamaan parabolik diperoleh bahwa kondisi pasang surut purnama merupakan periode yang paling optimal, hal ini ditunjukkan dengan tingkat kecocokan mencapai 94%, nilai korelasi rata-rata ( ) adalah 0,95 dan panjang rata-rata profil kecepatan arus yang dapat didekati persamaan parabolik mencapai 125 m.  The cross-sectional velocity profile in river flow is an important parameter which obtained in measuring river discharge with the Horizontal Acoustic Doppler Current Profiler (H‐ADCP) instrument. Circulation dynamic of river flow is generated by the interaction between river discharge, topography and tides. The Berau River in East Kalimantan is one of the river which has dominant influenced by tides. This study aims to determine the effect of tides on variations in the river cross-sectional velocity profile and to identify the degree of agreement between the flow velocity data profile and the parabolic equation. The research method is used the band pass filter (BPF) and low pass filter (LPF) for velocity data decomposition, and curve fitting of the velocity profile as measured by H-ADCP with parabolic equation. Parameter of the quality of curve fitting parabolic equation is determined by the degree of agreement, correlation coefficient (R), and the length of the velocity profile that can be approximated by the parabolic equation. The results of the study show the tides have a significant influence on the flow velocity in the Berau River. Tides play a role in determining the direction of flow velocity, the current moves upstream during high tide and flow moves downstream during low tide, with the magnitude of the velocity at spring tide reaching 1.2 m/s and around 0.5 m/s at neap tide. Tides have a significant influence on the contribution of current velocity, based on BPF result is obtained that 85% of the total current velocity is generated by tides, while non-tidal current contributes only 15%. The results of the curve fitting between the velocity profile and the parabolic equation show the spring tide condition as the most optimal period, this is indicated by the agreement level reaching 94%, the mean correlation is 0.95 and the average length of the velocity profile which can be approached with the parabolic equation is 125 m.

oai:ojs.ejournal.undip.ac.id:article/6929 2014-05-20T06:37:11Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6929 2014-05-20T06:37:11Z Buletin Oseanografi Marina Vol 2, No 1 (2013): Buletin Oseanografi Marina; 66-73 Pramesti, Rini; Jurusan Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro 2013-01-20 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6929 en Agar banyak dimanfaatkan dalam kehidupan dan kebutuhan ini semakin meningkat, sehingga ada usaha untuk memperbaiki produksinya.  Salah satu jenis rumput laut penghasil agar adalah Gracilaria lichenoides. Penelitian ini bertujuan untuk mengetahui pengaruh pengkayaan media kultur terhadap laju pertumbuhan rumput laut G. lichenoides. Sampel yang digunakan adalah ujung thallus G.  lichenoides, diperoleh dari Pantai Geger, Nusa Dua, Bali. Metode yang digunakan adalah metode eksperimental dengan  Rancangan Acak Lengkap (RAL) menggunakan 4 perlakuan dan 5 ulangan. Media pemeliharaan yang digunakan adalah air laut yang diperkaya dengan penambahan nutrien dengan komposisi NH4Cl 40µM, Na2HPO4 4µM, thiamin 100 µg, riboflavin 0,5 µg, dan vitamin B12 0,5 µg.  Media yang digunakan memiliki pengenceran 500 mL, 1000 mL, dan 1500 mL sebagai perbedaan konsentrasinya. Data yang diambil berupa berat basah tanaman uji dan kualitas air media. Analisis data menggunakan uji General Linear Model (GLM) dengan perhitungan berulang (repeated measure). Hasil penelitian menunjukkan bahwa laju pertumbuhan harian (%) tidak berbeda nyata antara perlakuan penggunaan media air laut diperkaya terhadap pertumbuhan G. lichenoides. Laju pertumbuhan yang dicapai perlakuan K (air laut steril/kontrol) sebesar 2,44±0,38 hari-1, perlakuan A (pengenceran 500 mL) sebesar 2,49±0,42 hari-1, B (pengenceran 1000 mL) sebesar 2,82±1,22 hari-1, dan C (pengenceran 1500 mL) sebesar 2,35±0,67 hari-1.   Kata kunci: Laju Pertumbuhan, G. lichenoides, Pengkayaan Media

oai:ojs.ejournal.undip.ac.id:article/74216 2026-02-11T04:57:56Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/74216 2026-02-11T04:57:56Z Buletin Oseanografi Marina Vol 15, No 1 (2026): Buletin Oseanografi Marina; 157-167 Putri, Septya Anggoro; Faculty of Fisheries and Marine Science, Universitas Jenderal Soedirman Zainudin, Muhammad; National Park Management Section, Karimunjawa National Park Center Riyanti, Riyanti; Faculty of Fisheries and Marine Science, Universitas Jenderal Soedirman 2026-02-25 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/74216 Coral Reef; Hard Coral Cover; Coral Growth Forms; UPT; Karimunjawa Islands en Karimunjawa Islands is a national park that has abundant natural resource potential and high biodiversity, especially in coral reef ecosystems. However, the utilization of coral reef ecosystems for marine tourism development has a negative impact on the condition of coral reefs. This study aims to determine the physical and chemical conditions of waters, the growth forms of coral reefs, and the condition of coral reefs in the marine tourism utilization zone of Menjangan Kecil Island, Karimunjawa Islands. A survey method was used for this research. Data were collected at four stations using the Underwater Photo Transect (UPT) method and analyzed using CPCe software. The results showed that the physical and chemical conditions of the water, including temperature, brightness, and pH, were still suitable to support the survival and growth of corals. There were 13 types of coral growth forms found, including Acropora Branching (ACB), Acropora Digitate (ACD), Acropora Encrusting (ACE), Acropora Submassive (ACS), Acropora Tabulate (ACT), Coral Branching (CB), Coral Encrusting (CE), Coral Foliose (CF), Coral Heliopora (CHL), Coral Massive (CM), Coral Millepora (CME), Coral Mushroom (CMR), and Coral Submassive (CS). The highest percentage of hard coral cover was found at station 2, with a value of 84.17%, and the lowest was found at station 3, with a value of 62.01%. Overall, the condition of coral reefs in the marine tourism utilization zone of Menjangan Kecil Island was in the high category. 

oai:ojs.ejournal.undip.ac.id:article/23363 2020-09-27T10:49:01Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/23363 2020-09-27T10:49:01Z Buletin Oseanografi Marina Vol 9, No 1 (2020): Buletin Oseanografi Marina; 9-18 Wiguna, Edwin Adi; Badan Pengkajian dan Penerapan Teknologi Wibowo, Mardi; Badan Pengkajian dan Penerapan Teknologi Rachman, Reno Arief; Badan Pengkajian dan Penerapan Teknologi Aziz, Hilmi; Badan Pengkajian dan Penerapan Teknologi Nugroho, Sapto; Badan Pengkajian dan Penerapan Teknologi 2020-04-30 08:00:12 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/23363 hidrooseanografi; hidrodinamika; pasang surut; diurnal; hindcasting; Sungailiat Badan Pengkajian dan Penerapan Teknologi id Muara Sungai Jelitik di Sungailiat Bangka merupakan alur pelayaran bagi banyak jenis kapal karena di muara ini terdapat Pelabuhan Perikanan (PPN) Sungailiat.Sedimentasi yang terjadi di muara Sungai Jelitik sangat merugikan, karena ketika air laut surut terendah muara ini tertutup sehingga mengganggu kelancaran lalu lintas kapal dari air kantong ke laut bebas maupun sebaliknya.Pantai Pulau Bangka adalah pantai yang mempunyai arus gelombang dan angkutan sedimen sejajar pantai cukup besar yang dipengaruhi oleh gelombang musim angin barat dan musim angin timur. Guna menjamin kelancaran lalu lintas kapal di lokasi tersebut, maka proses sedimentasi di area tersebut harus dikendalikan sehingga tidak menutup alur pelayaran. Pemahaman tentang dinamika kondisi hidrooseanografi di perairan tersebut diperlukan untuk memilih dan menentukan tindakan pengendalian sedimen. Oleh karena itu perlu adanya survei dan kajian yang bertujuan mengetahui kondisi hidrooseanografi di perairan sekitar muara Sungai Jelitik sebagai bahan pertimbangan untuk menentukan tindakan dan perancangan pengendalian sedimentasi di lokasi tersebut.Metode yang dipakai dalam kajian ini adalah survei dan pemetikan data langsung di lapangan kemudian dilakukan pengolahan dan analisis data hasil survei tersebut. Berdasarkan hasil kajian ini diketahui bahwa kedalaman laut di depan muara Sungai Jelitik bervariasi dari 1 m hingga 30 m, dengan karakteristik dasar perairan sangat dipengaruhi aktivitas penambangan pasir laut. Tipe pasut di Sungailiat adalah tipe harian tunggal (diurnal) dengan arah arus dominan barat dan timur dengan kecepatan maksimum 16,3 cm/dt. Tinggi gelombang bervariasi antara 0-1,5 m. The Jelitik River Estuary at Sungailiat Bangka is a navigation channel for many types of ships because, at this estuary, there is a Sungailiat Fishery Port. Sedimentation that occurs at the mouth of the Jelitik River is very detrimental because when the tide is lowest, the inlet is closed, so disrupted ship traffic. The coast of Bangka Island is a coast that has a massive wave of current and longshore sediment transport that is influenced by the waves of the west wind season and the east wind season. To ensure the smooth flow of ships at that location, the sedimentation process in the area must be controlled so that it does not close the shipping lanes. To select and determine these sediment control measures, an understanding of the dynamics of hydro oceanographic conditions in these waters is needed. Therefore it is necessary to have a survey and study to investigate the condition of hydro oceanography in the waters around the Jelitik River estuary. The study is important for determining the actions and design of sedimentation control in these locations. The method used in this study is surveying and picking data directly in the field, then processing and analyzing the results of the survey data. Based on the results of this study, it is known that the depth of the sea in front of the Jelitik River estuary varies from 1 m to 30 m, with the basic characteristics of the waters strongly influenced by the activity of sea sand mining. Tidal type in Sungailiat is a single daily type (diurnal) with the direction of dominant currents west and east with a maximum speed of 16.3 cm / s. Wave height varies between 0-1.5 m.

oai:ojs.ejournal.undip.ac.id:article/6955 2014-05-22T09:07:54Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6955 2014-05-22T09:07:54Z Buletin Oseanografi Marina Vol 2, No 3 (2013): Buletin Oseanografi Marina; 94-103 Pratikto, Ibnu; Jurusan Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro 2013-07-22 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6955 en Penelitian ini bertujuan untuk mengkaji potensi Pantai Joko Tingkir Kabupaten Pemalang sebagai kawasan wisata bahari dan produk wisata apa yang dapat dikembangkan di Pantai Joko Tingkir. Tujuan penelitian ini untuk mengkaji potensi Pantai Joko Tingkir sebagai kawasan wisata bahari. Data primer diperoleh dengan pengamatan dan observasi langsung. Penelitian dilaksanakan pada Bulan Agustus 2009 sampai Bulan Desember 2009. Metode yang digunakan dalam penelitian ini adalah metode survey dan metode deskriptif, pengambilan sampel dengan menggunakan metode purposive. Hasil penelitian menunjukkan bahwa Pantai Joko Tingkir Kabupaten Pemalang berpotensi untuk dijadikan kawasan wisata bahari dengan produk wisata yang dapat dikembangkan adalah wisata alam, wisata olah raga dan wisata pantai. Kata Kunci : Potensi pantai, Pariwisata, Pantai Joko Tingkir

oai:ojs.ejournal.undip.ac.id:article/31797 2021-02-01T08:06:44Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/31797 2021-02-01T08:06:44Z Buletin Oseanografi Marina Vol 10, No 1 (2021): Buletin Oseanografi Marina; 13-22 Adibrata, Sudirman; Program Studi Manajemen Sumberdaya Perairan, Universitas Bangka Belitung Sari, Fajar Indah Puspita; Program Studi Kimia, Universitas Bangka Belitung Andriyadi, Andriyadi; Ikatan Sarjana Kelautan Indonesia DPW Bangka Belitung Harto, Budi; Pos Pelayanan Teknologi Kabupaten Bangka Tengah 2021-02-01 10:08:04 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/31797 garam krosok; kualitas; timah; masyarakat pesisir, alternatif; NaCl; Takari id Garam-garaman tersedia di air laut sebagai sumberdaya alam yang melimpah, garam ini diekstraksi untuk memenuhi kebutuhan manusia sehari-hari. Penelitian bertujuan untuk mengetahui potensi kualitatif produksi garam dari Pantai Lubuk dan Pantai Takari, Bangka Belitung. Dua metode sebagai perbandingan yaitu metode perebusan di Pantai Lubuk Desa Lubuk, dan metode penjemuran konvensional air laut yang dilanjutkan rekristalisasi di Pantai Takari Desa Rebo. Analisis potensi kualitatif garam krosok ini membandingkan dengan lokasi lain dan standar SNI. Hasil penelitian menunjukan bahwa potensi kualitastif produksi garam dari Pantai Lubuk dan Pantai Takari cukup menjanjikan karena mampu bersaing dengan produksi dari wilayah lain dan kualitasnya masih dapat ditingkatkan. Berdasarkan metode perebusan tradisional diperoleh kadar NaCl bernilai 89,98%, sementara dengan cara dijemur konvensional dan direkristalisasi bernilai 90,94%, nilai ini menunjukan bahwa kadar NaCl masih di bawah standar SNI yang bernilai 94,0%. Namun demikian, hasil garam ini masih dapat dipergunakan untuk pengasinan ikan, campuran pakan, dan pupuk. Kualitas garam dari Pantai Lubuk dan Pantai Takari untuk Kadar KIO3 tidak terdeteksi, Kadar Bagian yang Tidak Larut dalam Air bernilai 8,98% dan (-); Kadar Air bernilai 2,23% dan 13,10%; Unsur zat pencemar Cd, Pb, Hg, As (dari Pantai Lubuk tidak terdeteksi dan dari Pantai Takari <0,0108, <0,0077, <0,0002, <0,0001). Dengan demikian, penelitian lanjutan diperlukan untuk meningkatkan kualitas garam menjadi lebih baik menuju kualitas standar. Kualitas garam yang baik secara ekonomi dapat menguntungkan sebagai alternatif mata pencaharian masyarakat pesisir di Desa Rebo dan Desa Lubuk. Various salt minerals are available in sea water as an abundant natural resource. This salt can be extracted to meet everyday human needs. This study aims to determine the qualitative potential of salt production from Lubuk Beach and Takari Beach, Bangka Belitung. Two methods were compared: the boiling method (at Lubuk Beach, Lubuk Village) and the conventional seawater drying method followed by recrystallization (at Takari Beach, Rebo Village). the quality of krosok salt analysis was compared with the salt quality from other locations and SNI standards. The results showed that the qualitative potential of salt production from Lubuk Beach and Takari Beach is quite promising because it can compete with production from other regions and its quality can still be improved. Based on the traditional boiling method, the NaCl content in salt was 89.98%, while conventional and recrystallized drying method was 90.94%, this value indicates that the NaCl content was still below the SNI standard (94.0%). However, this salt can still be used for fish salting, feed mixtures and fertilizers. The salt from Lubuk Beach and Takari Beach did not show KIO3 levels, the water-insoluble portion content was 8.98% and (-); Water content was 2.23% and 13.10%; Pollutant elements Cd, Pb, Hg, As (undetectable from Lubuk Beach and from Takari Beach <0.0108, <0.0077, <0.0002, <0.0001). Further research is needed to improve the quality of salt to be better towards standard quality. Economically good quality salt can be beneficial as an alternative livelihood for coastal communities in Rebo and Lubuk villages.

oai:ojs.ejournal.undip.ac.id:article/63067 2024-11-04T07:16:45Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/63067 2024-11-04T07:16:45Z Buletin Oseanografi Marina Vol 13, No 3 (2024): Buletin Oseanografi Marina; 311-326 Zulfa, Istna Nabila; Magister Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Wirasatriya, Anindya; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Ismanto, Aris; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2024-10-30 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/63067 SPL; Klorofil-a; Angin; Curah Hujan; Selat Makassar id Selat Makassar merupakan perairan yang menghubungkan Laut Sulawesi di utara dengan Laut Jawa di selatan. Penelitian ini mengkaji variabilitas klorofil-a di Selat Makassar, khususnya di perairan Pulau Laut dan selatan Makassar dilihat dari variasi musiman dan antar tahunan dengan melihat pengaruh ENSO. Data penelitian menggunakan data berbasis citra satelit yang dianalisis melalui perataan klimatologi bulanan, pembuatan grafik time series dan analisis korelasi. Secara umum sebaran spasial dari klorofil-a di Selat Makassar menunjukkkan bahwa baerah pesisir memiliki kandungan klorifil-a lebih tinggi dibandingkan dengan daerah lepas pantai yang berada di tengah Selat Makassar. Pesisir timur Kalimantan memiliki klorofil-a yang cenderung lebih tinggi dibandingkan pesisir barat Sulawesi. Secara musiman, klorofil-a tertinggi terjadi pada bulan Desember yang bernilai 0.57 mg/m3 untuk rata-rata di seluruh area penelitian, sedangkan yang memiliki klorofil-a rendah yaitu pada bulan September bernilai 0.47 mg/m3. Fluktuasi klorofil ini dipengaruhi angin dan curah hujan. Di perairan Pulau Laut, variasi klorofil-a secara signifikan dipengaruhi curah hujan yang akan meningkatkan run-off sungai yang membawa nutrient dari daratan ke laut, sedangkan di perairan selatan Makassar, angin mempengaruhi fluktuasi klorofil-a melalui mekanisme upwelling. Analisis korelasi menunjukkan bahwa di perairan selatan Makassar dan Pulau Laut, faktor ENSO lebih berpengaruh terjadap curah hujan dibandingkan dengan angin. Karena variabilitas klorofil-a di perairan Selatan Makassar dipengaruhi oleh angin, ENSO cenderung kurang berpengaruh terhadap variabilitas klorofil-a di perairan Selatan Makassar. Sebaliknya, variabilitas klorofil-a di perairan Pulau Laut dipengaruhi oleh curah hujan, saat terjadi El-Niño klorofil-a akan turun karena curah hujan juga turun, dan saat terjadinya La-Niña klorofil-a akan meningkat karena curah hujan juga meningkat.

oai:ojs.ejournal.undip.ac.id:article/11290 2020-04-17T12:01:29Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/11290 2020-04-17T12:01:29Z Buletin Oseanografi Marina Vol 5, No 1 (2016): Buletin Oseanografi Marina; 1-13 Rizkiyah, Rizkiyah; Program Studi Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Sugianto, Denny Nugroho; Program Studi Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Purwanto, Purwanto; Program Studi Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2016-04-03 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/11290 en Teluk Balikpapan merupakan wilayah industri di Kalimantan, salah satunya terdapat industri pengolahan minyak dan gas bumi PT Pertamina UP V. Aktivitas pengolahan minyak dan gas bumi menghasilkan buangan sisa industri, salah satunya adalah buangan panas. Penelitian ini bertujuan untuk mengetahui pola sebaran buangan panas yang bersumber dari buangan PT. Pertamina UP V Balikpapan yang dipengaruhi oleh pola pergerakan arus. Data yang digunakan dalam penelitian ini berupa data arus,  pasang surut, peta batimetri, teperatur perairan, data temperatur dan debit buangan panas. Lokasi penelitian dilakukan di sekitar Perairan Kampung Baru, Teluk Balikpapan . Studi pola sebaran buangan panas dikaji dengan menggunakan pendekatan model hidrodinamika. Hasil simulasi model menunjukan bahwa kecepatan arus di Perairan Teluk Balipapan sebesar 0,01 m/det – 0,53 m/det dengan arah arus dominan selatan dan utara. Jarak terjauh sebaran panas terjadi saat kondisi purnama periode pasang tertinggi yaitu bergerak sejauh 1,44 km ke arah selatan dari titik outlet dengan temperatur buangan sebesar 36˚C hingga temperatur normal perairan sebesar 29˚C. Kata Kunci : Sebaran buangan panas, arus, temperatur perairan, Teluk Balikpapan.

oai:ojs.ejournal.undip.ac.id:article/38450 2022-05-20T01:15:04Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/38450 2022-05-20T01:15:04Z Buletin Oseanografi Marina Vol 11, No 1 (2022): Buletin Oseanografi Marina; 30-40 Shalsabella, Raisa Tria; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Brawijaya Indriyawan, Muji Wasis; Balai Pengelolaan Sumberdaya Pesisir dan Laut Sartimbul, Aida; Faculty of Fisheries and Marine Science, Universitas Brawijaya Marine Resources Exploration and Management (MEXMA), Universitas Brawijaya 2022-01-30 16:19:35 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/38450 Mangrove; Rehabilitasi; Kecamatan Brondong id Hutan mangrove merupakan kumpulan vegetasi mangrove yang tumbuh pada wilayah intertidal dan mempunyai banyak fungsi. Seiring dengan meningkatnya populasi manusia, kerusakan mangrove juga banyak terjadi, salah satunya di Kecamatan Brondong, Kabupaten Lamongan. Salah satu upaya konservatif untuk mengembalikan fungsi hutan mangrove adalah dengan rehabilitasi mangrove. Keterbatasan informasi jenis mangrove yang cocok untuk rehabilitasi dan luasan mangrove, serta sulitnya akses ke hutan mangrove menjadi alasan dilakukannya penelitian ini. Tujuan penelitian ini adalah untuk mengetahui jenis mangrove dan mengetahui luasan mangrove yang dapat ditanami di Kecamatan Brondong dengan menggunakan metode penginderaan jauh. Metode penginderaan jauh digunakan untuk proses digitasi tipe sedimen dan mangrove existing. Analisis harmonik digunakan untuk menentukan nilai pasang surut. Sedangkan, penentuan daerah genangan menggunakan metode Sistem Informasi Geografis (GIS).  Hasil analisis menunjukkan bahwa di Kecamatan Brondong terdapat mangrove existing dengan tipe sedimen berpasir, berlumpur dan berbatu. Analisis pasang surut menghasilkan rata-rata pasang 0,57±0,19 dan surut -0,53±0,21. Jenis mangrove yang dapat ditanam meliputi jenis Rhizophora sp., Avicennia sp, Sonneratia sp, Bruguiera sp., Aegiceras sp., Ceriops sp., dan Xyocarpus sp. Luas wilayah yang tidak dapat ditanami mangrove memiliki total sebesar 330,093 Ha. Sedangkan total luasan dari mangrove yang dapat ditanami adalah sekitar 872,483 Ha, sehingga total keseluruhan dari luasan mangrove pada wilayah tersebut adalah sebesar 1.202,577 Ha. Hasil penelitian ini diharapkan dapat menjadi salah satu referensi dan pertimbangan dalam rehabilitasi hutan mangrove di Kecamatan Brondong maupun di wilayah lainnya. Mangrove forest is a collection of mangrove vegetation that grows in intertidal areas and has many functions. Along with the increase in human population, there is also a lot of damage to mangroves, one of which is in Brondong District, Lamongan Regency. One of the conservative efforts to restore the function of mangrove forests is mangrove rehabilitation. The limited information on the types of mangroves suitable for rehabilitation and the extent of mangroves, as well as the difficulty of accessing mangrove forests are the reasons for conducting this research. The purpose of this study was to determine the types of mangroves and to determine the extent of mangroves that can be planted in Brondong District by using remote sensing methods. Remote sensing method is used for digitizing the existing sediment and mangrove types. Harmonic analysis is used to determine tidal values. Meanwhile, the determination of the inundation area uses the Geographic Information System (GIS) method. The results of the analysis show that in Brondong District there are existing mangroves with sandy, muddy and rocky sediment types. Tidal analysis resulted in an average tide of 0.57±0.19 and a low tide of -0.53±0.21. The types of mangroves that can be planted include Rhizophora sp., Avicennia sp, Sonneratia sp, Bruguiera sp., Aegiceras sp., Ceriops sp., and Xyocarpus sp. The total area that cannot be planted with mangroves is 330,093 Ha. While the total area of mangrove that can be planted is around 872.483 Ha, so that the total area of mangrove in the area is 1,202.577 Ha. The results of this study are expected to be one of the references and considerations in the rehabilitation of mangrove forests in Brondong District and in other areas.

oai:ojs.ejournal.undip.ac.id:article/63931 2026-02-11T04:49:13Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/63931 2026-02-11T04:49:13Z Buletin Oseanografi Marina Vol 14, No 2 (2025): Buletin Oseanografi Marina; 167-180 Kolibongso, Duaitd; Department of Marine Science, Faculty of Fisheries and Marine Science, Universitas Papua Sitinjak, Toni; Department of Marine Science, Faculty of Fisheries and Marine Science, Universitas Papua Bawole, Roni; Department of Marine Science, Faculty of Fisheries and Marine Science, Universitas Papua 2025-06-10 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/63931 composition; coral reef; diversity; target species; Oransbari en Reef fisheries particularly those targeting specific fish species are integral to the coral reef ecosystem. Unprotected sites typically exhibit substantial declines in fish densities due to fishing pressure. We conducted an analysis to determine whether the abundance of target fish species correlates with benthic community structure and changes in composition resulting from fishing activities. The point intercept transect (PIT) method was employed to evaluate coral reef condition, while underwater visual census (UVC) was utilized to assess target fish species at three sites in Oransbari Bay. The mean live coral cover in Oransbari Bay was measured at 20.2% ± 2.37 (mean ± standard error). Benthic cover exhibited variation, with rubble comprising 27.6% ± 3.73%, sand 29.3% ± 2.58%, dead coral 9.44% ± 2.91%, and turf algae 4.33% ± 3.47%. The target species group displayed diversity, with 13 species identified across six families: Acanthuridae, Lutjanidae, Serranidae, Caesionidae, Balistidae, and Mullidae. Reef fish abundance ranged from 3,146.7 to 9,986.7 individuals per hectare, with the Acanthuridae family demonstrating the highest abundance and diversity, as it was present at all locations. This study elucidates that the abundance and diversity of target reef fish species in unprotected areas are significantly influenced by coral cover and fishing activities. These findings provide crucial insights into the status of fish resources beyond protected areas in the Bird’s Head Peninsula, contributing valuable information for future management of coral reef ecosystems.

oai:ojs.ejournal.undip.ac.id:article/16558 2020-04-17T12:04:44Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/16558 2020-04-17T12:04:44Z Buletin Oseanografi Marina Vol 6, No 2 (2017): Buletin Oseanografi Marina; 94-101 Suryono, Suryono; Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Azizah, Ria; Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Kushartono, Edi Wibowo; Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Ario, Raden; Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Handoyo, Gentur; Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2017-11-18 00:38:55 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/16558 Investment; Gouper; Feasibility; Investasi; Kerapu; Budidaya en Kajian Investasi budidaya ikan kerapu di Karimunjawa adalah salah satu usaha guna menumbuhkan promosi investasi di wilayah studi. Kajian ini akan membuat peluang investasi menjadi lebih fokus dan tajam baik dari segi sektor maupun lokasinya, sehingga akan memudahkan investor guna merealisasikan rencana bisnisnya. Studi ini akan memberikan detail informasi kepada investor tentang peluang bisnis pada budidaya ikan kerapu yang sangat layak dilakukan sehingga dapat meningkatkan pertumbuhan ekonomi masyarakat pesisir dan wilayah kabupaten Jepara pada umumnya. Metode yang digunakan adalah metode survei. Peluang Investasi dianalisa secara deskriptif. Hasil kajian menunjukan bahwa berdasakan potensi alam, fasilitas infrastruktur produksi, nilai ekonomi serta aspek financial maka kelayakan investasi adalah sangat prospektif dan berpeluang untuk sukses. Analisis financial menunjukan bahwa investasi pada budidaya ikan kerapu di Karimunjawa adalah sangat layak untukdirealisasikan bagi investor. Budidaya ikan kerapu Tikus (Cromileptis altivelis)adalah paling prospektif, dimana nilai Net Present Value (NPV)> 0,yaitu  1,772,764,729,  dan  Profitability Index  (PI) lebih besar dari  1, yaitu 5,543291036.  Payback Periodadalah  2.82 tahun, jika tidak mempertimbangkan nilai uang (Discount Factors) dan 3.65 tahun  jika mempertimbangkan nilai uang. Sedangkan untuk budidaya ikan kerapu bebek(Ephinephelus fuscoguttatus), Net Present Value (NPV)> 0 yaitu  69,938,924, - dan Profitability Index (PI) lebih besar dari 1, yaitu 1,20558783.  (Pay Back Period) adalah  4,13tahun apabila tidak mempertimbangkan nilai uang (Discount Factor), sedangkan apabila mempertimbangkan nilai uang maka menjadi  and 4.64 tahun. Dari analisis yang dilakukan, maka dapat disimpulkan bahwa meskipun kedua spesies ikan kerapu layak investasi, tetapi ikan kerapu tikuspaling layak investasi, sedangkan ikan kerapu macansebagai produk sampingan investasi, yaitu dengan memanfaatkan sisa pakan yang tidak digunakan dalam budidaya ikan kerapu tikus, sehingga hasilnya akan dapat maksimal. Keseluruhan aspek yang dikaji menunjukan bahwa budiddaya ikan kerapu di Kepulauan Karimunjawa adalah layak investasi. The study of feasibility floating cage culture of grouper fish investment in Karimunjawa is one of the efforts for investment promotion in the studied region. This study will make the investment opportunities become more focus and sharp, both sectoral and location, so it will be easier for investors to execute their investment interest. The purpose of this study, is to provide initial information for investors about business opportunities of grouper fish farming as a very feasible investment opportunities so that can boost the economy of the region and the society of Jepara Regency. The method used in this study was survey  method, descriptive analysiswas conducted to see a of investment opportunities. Based on potential natural resources, location, infrastructure facilities, production, economy value, and financial aspect, the  results of study concluded  that the overall investment is highly prospective and has a fairly high chance to success. The financial analysis showed that investment in grouper fish cultivation in jepara regency is very feasible as a business investment for the investors. Humpback or Polka dot grouper (Cromileptis altivelis) culture is highly prospective and has a fairly high chance. This can be seen from the Net Present Value (NPV) > 0 is equal to 1,772,764,729,  and Profitability Index  (PI) value greater than 1, which is 5,543291036.  While the longer the period the funds invested will return (Payback Period) is 2.82 years if the without considering the time value of money (Discount Factors) and 3.65 years when considering the time value of money. Whereas,  for Brown marbled grouper (Ephinephelus fuscoguttatus), the Net Present Value (NPV) > 0 is equal to  69,938,924, - and Profitability Index (PI) greater than 1, which is 1,20558783. While the longer  period the funds invested will return (Pay Back Period) are 4,13 year if without considering the time value of money (Discount Factors) and 4.64 years when considering the time value of money. From the analysis it can be concluded that all these choices on the investment plan is feasible to run and prospective advantageous. While the best option is an investment plan on investments Humback or Polka Dot grouper (Cromileptis altivelis) cultivation, Brown marbled grouper (Ephinephelus fuscoguttatus) culture whereas it is only a sideline activity and only utilize food wastes are left, so the whole will be able to deliver optimal results in grouper culture.All examined aspects of Grouper cultivation in karimunjawa  gave results that investment activity  is able to be executed. The financial analysis shows that investment in grouper fish cultivation in jepara regency is very feasible to be a business investment for the investors.

oai:ojs.ejournal.undip.ac.id:article/44032 2023-01-25T06:05:53Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/44032 2023-01-25T06:05:53Z Buletin Oseanografi Marina Vol 11, No 3 (2022): Buletin Oseanografi Marina; 291-305 Widada, Sugeng; Departemen Oseanografi Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Darda, Ikram Maulana; Departemen Oseanografi Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Satriadi, Alfi; Departemen Oseanografi Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2022-10-01 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/44032 Tsunami; COMCOT; Ancaman; Kabupaten Lumajang id Indonesia merupakan negara yang diapit oleh 3 lempeng tektonik yang saling mendesak satu sama lain, sehingga memiliki ancaman yang cukup tinggi terhadap tsunami. Salah satu sumber tsunami di Indonesia yaitu Zona Subduksi Jawa yang membentang sepanjang selatan pulau Jawa dan memiliki potensi gempa sebesar 8,9 Mw. Tsunami Banyuwangi 1994 dan Tsunami Pangandaran 2006 merupakan tsunami yang terjadi pada zona tersebut. Berdasarkan Indeks Resiko Bencana, Kabupaten Lumajang memiliki ancaman yang tinggi terhadap tsunami dan masuk ke dalam peringkat 37 nasional. Tujuan penelitian ini untuk mengetahui karakteristik tsunami, tingkat ancaman, dan luas wilayah yang terdampak di Kabupaten Lumajang. Metode yang digunakan pada penelitian ini adalah pemodelan numerik 2D menggunakan aplikasi COMCOT v 1.7, yang kemudian diklasifikasikan menggunakan ArcGIS 10.5. Hasil dari penelitian ini yaitu tsunami yang terjadi dengan kekuatan 8,9 Mw memiliki waktu tempuh 31 – 38 menit untuk mencapai daratan dengan kecepatan yang mencapai 45,5 m/s. Ketinggian maksimal gelombang sebesar 49,7 m dengan jarak inundasi 14,83 km. Wilayah yang memiliki ancaman paling tinggi berada pada Kecamatan Yosowilangun dengan jangkauan tsunami mencapai 69,42 km2 atau 99,08% dari total luas wilayahnya.  Indonesia is a country flanked by 3 tectonic plates that urge each other, so it has a high enough threat to tsunamis. One of the sources of the tsunami in Indonesia is the Java Subduction Zone which stretches along the southern island of Java and has an earthquake potential of 8.9 Mw. The Banyuwangi tsunami in 1994 and the Pangandaran Tsunami in 2006 were tsunamis that occurred in the zone. Based on the Disaster Risk Index, Lumajang Regency has a high threat to tsunamis and is ranked 37th nationally. The purpose of this study is to find out the characteristics of the tsunami, the threat level, and the area affected in Lumajang Regency. The method used in the study was 2D numerical modeling using the COMCOT v 1.7 software, which was later classified using ArcGIS 10.5. The result of this study is that a tsunami that occurred with a magnitude of 8.9 Mw has a travel time of 31-38 minutes to reach land at a speed that reaches 45.5 m/s. The maximum height of the wave is 49.7 m with an inundation distance of 14.83 km. The area that has the highest threat is in Yosowilangun District with a tsunami range of 69.42 km2 or 99.08% of the total area.

oai:ojs.ejournal.undip.ac.id:article/6919 2014-05-20T04:08:38Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6919 2014-05-20T04:08:38Z Buletin Oseanografi Marina Vol 2, No 1 (2013): Buletin Oseanografi Marina; 1-6 Rochaddi, Baskoro; Marine Science Department, Diponegoro University Suryono, Chrisna Adhi; Marine Science Department, Diponegoro University 2013-01-20 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6919 en Heavy metals in the aquatic environment have to date come mainly from naturally occurring geochemical materials. However, this has been enhanced by human activities such as boat activity, industrial effluents, domestic sewage etc. An attempt was made to determine the level of trace metals such as Mercury (Hg), Lead (Pb), Iron (Fe), Chromium (Cr) and Copper (Cu). The physico-chemical and trace metal contents of water samples from coastal zone of Semarang were assessed using Atomic Absorption Spectrophotometer technique. Results indicated that low variation existed among some physico-chemical parameter (pH, temperature, salinity). In the water sample colour, taste and odor were investigated. Heavy metal levels (mg L-1) in the water were Cr 5.083 + 1.59, Pb 5.52 + 1.34,  Fe 1.199 + 1.29. However, Hg and Cu were not detected in any of the samples. Comparison of the metal contents in the water sample with World Health Organization (WHO) limits and Indonesian Drinking & Domestic Water Quality Standard for Ground Water showed that the mean levels of Fe, Pb, Cr were exceeded the maximum permissible levels for drinking  water. This work has conclusively proven the presence of dangerous heavy metal contamination of the groundwater supply in the coastal area of Semarang.   Key words: Physico-chemical parameters, heavy metals,  Atomic Absorption Spectrophotometer

oai:ojs.ejournal.undip.ac.id:article/78458 2026-02-11T04:57:56Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/78458 2026-02-11T04:57:56Z Buletin Oseanografi Marina Vol 15, No 1 (2026): Buletin Oseanografi Marina; 45-55 Wulansari, Willy; Magister Program of Marine Sciences, Faculty of Fisheries and Marine Science, Universitas Diponegoro Directorate of Marine Meteorology, Indonesian Agency for Meteorology Climatology and Geophysics Widada, Sugeng; Department of Oceanography, Faculty of Fisheries and Marine Science, Universitas Diponegoro Maslukah, Lili; Department of Oceanography, Faculty of Fisheries and Marine Science, Universitas Diponegoro Wirasatriya, Anindya; Department of Oceanography, Faculty of Fisheries and Marine Science, Universitas Diponegoro Sari, Titi; Directorate of Marine Meteorology, Indonesian Agency for Meteorology Climatology and Geophysics 2026-02-25 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/78458 Marine Heatwaves; North coast of Java; OSTIA; in-situ data; FAR; POD en Global warming is driving an increase in the frequency and intensity of Marine Heatwaves (MHWs), which have a significant impact on coastal ecosystems. The detection of  MHWs in Indonesia's coastal regions remains understudied due to limited long term in-situ data, while satellite products often have a coarse resolution that cannot capture local coastal dynamics. This study addresses this gap by detecting MHWs on the north coast of Java. It evaluates the performance of the  Operational Sea Surface Temperature and Ice Analysis (OSTIA) product by comparing it against in-situ data from four Marine Automatic Weather Stations (Patimban, Karimunjawa, Rembang, and Paciran) from 2022–2024. To simulate an operational satellite based approach, MHWs were identified in the in-situ daily minimum temperature records using a climatology and 90th percentile threshold derived from the nearest satellite grid point. The statistical comparison reveals spatially variable differences in MHW frequency, duration, and total days between the two data sources. Event matching analysis indicates the best satellite performance at Paciran (Probability of Detection (POD)=0.74, False Alarm Ratio (FAR)=0.13), where most in-situ events were successfully captured. Conversely, the weakest performance was at Rembang (POD=0.43, FAR=0.59), where the satellite missed over half of the MHW days and exhibited a high false alarm rate. These findings demonstrate that significant MHWs occur in coastal regions, phenomena that may not be accurately captured by satellite data alone. 

oai:ojs.ejournal.undip.ac.id:article/25304 2020-04-17T12:08:37Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/25304 2020-04-17T12:08:37Z Buletin Oseanografi Marina Vol 8, No 2 (2019): Buletin Oseanografi Marina; 55-60 Afriady, Ary; Sekolah Staf dan Komando Angkatan Laut Alam, Tasdik Mustika; Sekolah Staf dan Komando Angkatan Laut Azis Ismail, Mochamad Furqon Mustika; Pusat Penelitian Oseanografi, Lembaga Ilmu Pengetahuan Indonesia 2019-10-04 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/25304 angin; gelombang laut; Pulau Natuna; monsun id Analisis data angin dilakukan untuk meramalkan dan menentukan karakteristik gelombang laut di perairan Pulau Natuna. Data angin yang digunakan dalam penelitian ini berasal dari National Centers for Environmental Prediction (NCEP) selama 10 tahun dari tahun 2009 sampai dengan tahun 2018. Metoda yang digunakan untuk estimasi tinggi, periode dan arah gelombang laut yang dibangkitkan oleh angin adalah metode Svedrup, Munk dan Bretschneider (SMB). Hasil perhitungan peramalan karakteristik gelombang diperoleh bahwa pembentukan gelombang didominasi oleh arah yang berasal dari timur laut dan terjadi pada musim barat dan musim peralihan 1. Adapun pada musim timur dan peralihan, arah dominan gelombang masing-masing berasal dari selatan dan barat daya. Tinggi gelombang maksimum 1,0-1,4 m sering terjadi pada musim musim timur, adapun tinggi gelombang minimum 0,2-0,6 m dominan terjadi pada musim musim peralihan. Periode gelombang dominan ditemukan pada kisaran 7-9 detik yang terjadi pada tiap musim.  The analysis of wind data has been done to forecast and determine the characteristic of the ocean wave in Natuna Island waters. The wind data in this study came from the National Centers for Environmental Prediction (NCEP) for a period of 10 years from 2009 to 2018. The method to estimate wave height, wave period, and wave direction generated by wind is Sverdrup, Munk dan Bretschneider (SMB) system. The results of wave forecasting analysis show that the formation of the wave is mainly originated from the northeast which occurs during the west and first transition season. As for the east and second transition season, the origin of wave formation coming from the south and southwest, respectively. The maximum wave height of 1.0-1.4 m frequently occurs during the east monsoon, while the minimum wave height. The dominant wave period is found in the range of 7-9 seconds, which occurs in every season. 

oai:ojs.ejournal.undip.ac.id:article/48984 2023-11-04T02:49:24Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/48984 2023-11-04T02:49:24Z Buletin Oseanografi Marina Vol 12, No 3 (2023): Buletin Oseanografi Marina; 456-464 Soenardjo, Nirwani; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Mentari, Refinda Juliant; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2023-10-03 05:31:11 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/48984 Fitoremediasi; Rhizofiltrasi; Rhizophora mucronata id Pekalongan merupakan kota dengan kegiatan industri tekstil  cukup besar, terutama industri batik. Kegiatan industri ini menghasilkan limbah (salah satunya logam berat) diduga dapat mencemari lingkungan. Tembaga (Cu) dan Timbal (Pb) adalah logam berat yang   umum digunakan sebagai pewarna mordant dalam pewarnaan tekstil.  Mangrove Park di Kota Pekalongan sangat penting karena vegetasi mangrove mampu mengakumulasi logam berat.  Rhizophora mucronata digunakan sebagai fitoremediator karena dapat mengakumulasi logam berat. Tujuan penelitian ini menganalisis potensi R. mucronata sebagai agen fitoremediasi logam berat Pb dan Cu. Metode purposive sampling digunakan untuk pengambilan data dan sampel dianalisis dengan alat AAS (Atomic Absorption Spectophotometry). Hasil analisis Pb dan Cu ditemukan dalam sampel air, sedimen, daun, akar dan serasah mangrove. Konsentrasi  Pb lebih tinggi dibandingkan dengan Cu, bagian akar R.mucronata  konsentrasi Pb lebih tinggi (3,658 mg/kg). Berdasarkan  Nilai Bio Concentratiosn Factor (BCF) < 1  dan Translocation Factors (FC) < 1, maka R.mucronata adalah tumbuhan excluder yang mempunyai mekanisme Rhizofiltrasi.  Pekalongan city is widely known as a city with a fairly large-scale textile industry, especially batik industry. These industrial activities have produced wastes (one of them is heavy metal) that can pollute the environment.  Copper (Cu) and Lead (Pb) were a heavy metal commonly used as a dye mordant in textile dyeing. The existence of Mangrove Park in Pekalongan city has an important role due to mangrove vegetation ability to accumulate heavy metals. Rhizophora mucronata was fairly used as phytoremediator due to its ability to accumulate heavy metals. This research purpose was conducted to analyze the potential of R. mucronata as phytoremediator agent for heavy metals such as Pb and Cu. Purposive sampling method was used for data collection and samples were analyzed by AAS (Atomic Absorption Spectophotometry) method. The result of Pb and Cu analysis found in water samples, sediments, leaves, roots and mangrove litter. Pb concentration higher than Cu concentration, on R. mucronata roots were found that the Pb concentration as high as 3,658 mg/kg. Based on Bio Concentrations Factor (BCF) <1 and Translocation Factors (FC)<1, mangrove R. mucronata is an excluder plant that has a rhizofiltration mechanism.

oai:ojs.ejournal.undip.ac.id:article/29453 2021-02-01T08:06:07Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/29453 2021-02-01T08:06:07Z Buletin Oseanografi Marina Vol 9, No 2 (2020): Buletin Oseanografi Marina; 133-140 Yudiati, Ervia; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Ridlo, Ali; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Nugroho, Annisa Afifah; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Sedjati, Sri; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Maslukah, Lilik; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2020-10-15 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/29453 Gracilaria sp.; Agar; Pigment; Proxymate; Reservoir; Bioflter id Gracllaria sp. merupakan rumput laut yang memiliki nilai ekonomis tinggi karena menghasilkan agar. Agar banyak dimanfaatkan dalam bidang industri maupun pangan. Kualitas Gracilaria sp. ditentukan oleh kadar agar, pigmen serta  proksimatnya. Penelitian ini bertujuan untuk mengkaji pengaruh parameter kualitas media tumbuh Gracilaria sp. terhadap biosintesis agar, klorofil a, karoten dan kadar proksimat (protein, karbohidrat, lemak, abu, dan air). Lokasi pengambilan sampel di reservoir dan biofilter tambak udang Vaname (Litopenaeus vannamei). Kondisi lingkungan perairan yang diukur adalah kandungan nitrat dan fosfat, suhu air, salinitas, DO (oksigen terlarut), serta pH (Derajat keasaman). Ekstraksi agar dilakukan dengan metode alkali. Karakterisasi agar menggunakan analisis Fourier Transform Infra Red. Hasil penelitian menunjukkan kandungan agar (31,4 ± 0,42%) pada reservoir lebih baik dibandingkan biofilter. Begitu pula dengan konsentrasi klorofil a (19,61 ± 0,04 mg/g), karotenoid (7,42 ± 0,21 µmol/g) serta kadar protein (15,38 ± 0,27%). Kadar lemak, karbohidrat, air dan abu pada kedua lokasi tidak berbeda nyata. Hasil karakterisasi agar menujukkan keberadaan gugus galaktosa 3,6-anhydro-L-galaktosa. Gracilaria sp. is well known as to has a high economically value, due to the application of the agar content that is used in various industries especially in food industry. The quality of Gracilaria sp. depends on agar and pigment content as well as proximate analysis. This study aimed to investigate the effect of water quality parameter on Gracilaria sp habitats to agar, chlorophyl a, carotene and proximate analysis (protein, carbohydrate, total lipid, ash, water content). Samples were collected from reservoir and biofilter from Litopenaeus vannamei’s waste pond. Water quality parameter measured were nitrate and phosphate, water temperature, salinity, dissolved oxygen (DO) and pH. Agar extraction was done by alkali methods. Agar and its chemical structure were characterized by FT-IR analysis. Results showed that agar content (31.4 ± 0.42%) on reservoir was better than biofilter. Higher results from reservoir samples were also found in chlorophyl a (19.61 ± 0.04 mg/g), carotenoids (7.42 ± 0.21 µmol/g) and protein level (15.38 ± 0.27 %). On the other hand, total lipid, carbohydrate, water and ash content were similar. Based on FT-IR analysis shows that the galactose 3,6-anhydro-L-galactose was present.

oai:ojs.ejournal.undip.ac.id:article/53625 2024-07-04T18:54:21Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/53625 2024-07-04T18:54:21Z Buletin Oseanografi Marina Vol 13, No 2 (2024): Buletin Oseanografi Marina; 153-165 Masitoh, Ferryati; Program Studi Geografi, Departemen Geografi, Fakultas Ilmu Sosial, Universitas Negeri Malang Saifanto, Basofi Andri; Program Studi Geografi, Departemen Geografi, Fakultas Ilmu Sosial, Universitas Negeri Malang 2024-06-05 22:58:04 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/53625 airtanah; intrusi airlaut; GALDIT id Airtanah dangkal memiliki kerentanan yang tinggi terhadap intrusi air laut. Kecamatan Sukolilo Kota Surabaya berada di pesisir Selat Madura, sehingga menjadikan pentingnya pendugaan kerentaan airtanah terhadap intrusi air laut. Metode yang digunakan dalam penelitian ini yaitu metode GALDIT dengan variabel: Keterdapatan airtanah (G), Konduktivitas hidrolik akuifer (A), Tinggi muka airtanah terhadap air laut (L), Jarak tegak lurus muka air tanah dari garis pantai (D), Intrusi air laut (I) dan Ketebalan Akuifer (T). Pada variabel G, daerah penelitian didominasi akuifer dangkal. Variabel A menunjukkan bahwa sebagian besar daerah penelitian memiliki konduktivitas hidrolik sebesar 22 m/hari yang cukup rentan terhadap intrusi air laut. Variabel L menunjukkan bahwa elevasi muka airtanah cukup kecil sebesar 1,5 m. Variabel D menunjukkan kerentanan airtanah cukup tinggi di sepanjang garis pantai. Variabel I merupakan variabel yang berkaitan dengan kualitas airtanah. Daerah yang dekat dengan pantai memiliki Daya Hantar Listrik dan Cl- yang lebih tinggi. Variabel T merupakan ketebalan akufer dangkal kurang dari 10 m. Hasil penelitian berdasarkan metode GALDIT menunjukkan bahwa 30,30% daerah penelitian berkategori Kerentanan Airtanah yang tinggi terhadap Intrusi Air laut. Kerentanan Airtanah tinggi tersebar di sepanjang garis pantai, atau sebagian besar kelurahan Keputih.  Shallow groundwater is highly vulnerable to seawater intrusion. Sukolilo District, Surabaya City, is on the coast of the Madura Strait, making it important to estimate groundwater vulnerability to seawater intrusion. The method used in this research is the GALDIT method with variables: Groundwater availability (G), Hydraulic conductivity of the aquifer (A), Groundwater level relative to seawater (L), Perpendicular distance of the groundwater level from the coastline (D), Water intrusion sea (I) and Aquifer Thickness (T). In variable of G, the research area is dominated by shallow aquifers. The variable of A shows that most of the study area has a hydraulic conductivity of 22 m/day, which is quite vulnerable to seawater intrusion. The variable of L shows that the groundwater level is relatively small at 1.5 m. The variable of D shows that groundwater vulnerability is relatively high along the coastline. Variable I is a variable related to groundwater quality. Areas close to the coast have higher electrical conductivity and Cl-. The variable of T is the thickness of a shallow aquifer of less than 10 m. The research results based on the GALDIT method show that 30.30% of the research areas are in the category of high groundwater vulnerability to seawater intrusion, while the others are in the medium to low category. There is high groundwater vulnerability along the coastline and most of the Keputih sub-district.

oai:ojs.ejournal.undip.ac.id:article/11213 2020-04-17T12:01:12Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/11213 2020-04-17T12:01:12Z Buletin Oseanografi Marina Vol 3, No 1 (2014): Buletin Oseanografi Marina; 9-19 Wulandari, Sri Yulina; Fakultas Perikanan dan Ilmu Kelautan UNDIP Yusuf, Muh; Fakultas Perikanan dan Ilmu Kelautan UNDIP Muslim, Muslim; Fakultas Perikanan dan Ilmu Kelautan UNDIP 2014-01-03 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/11213 en Kecamatan Genuk merupakan wilayah di Semarang yang perkembangan industrinya sangat pesat, sehingga telah banyak menyumbang limbah ke perairan Genuk. Kegiatan manusia yang berpotensi besar meningkatkan konsentrasi limbah ke lingkungan perairan Genuk berasal dari kegiatan industri yang banyak terdapat di sepanjang Jalan Raya Kaligawe, kawasan industri Terboyo, dan kawasan Lingkungan Industri Kecil (LIK). Limbah yang dibawa oleh sungai akan mencapai perairan pantai, yang kemudian akan dapat didistribusikan ke segala arah oleh arus laut. Tujuan penelitian adalah untuk mengetahui konsentrasi dan sebaran parameter kualitas air di perairan pantai Genuk, Semarang dan pengaruh kecepatan arus terhadap sebaran parameter kualitas perairan. Penelitian ini dilaksanakan selama 5 bulan, dimulai bulan Juni sampai Oktober 2013 meliputi penyusunan proposal, persiapan penelitian, pelaksanaan penelitian, analisis laboratorium hingga penyusunan laporan akhir. Pengambilan sampel air dan sedimen di lapangan dilakukan pada tanggal 4 Mei 2013. Metode yang digunakan dalam penelitian ini adalah metode diskriptif. Pengambilan data dilakukan dengan metode survei, dan metode sampling yang dipergunakan adalah purposive sampling. Hasil penelitian menunjukkan bahwa parameter fisika dan kimia seperti temperatur, salinitas, pH dan DO secara berturut-turut berkisar 28-32 oC, 31-32,5 %0, 6,7 -7,9 dan 7,1 – 8,3 ppm dengan nilai rata-rata 30,95oC, 14,41 %o, 7,05 dan 5,95 ppm.  Konsentrasi nitrat, fosfat terlarut dan Pb dalam sedimen adalah 0,291 – 0,349 ppm (tingkat kesuburan sedang), 0,175-0,215 ppm (tingkat kesuburan sangat baik), dan 15,89 – 23,02 ppm.  Kecepat arus yang terjadi saat penelitian adalah 0,0222 m/det - 0,1985 m/det yang kurang mampu mempengaruhi sebaran, karena sebaran parameter kimia dan fisika lebih dipengaruhi oleh jauh dekatnya dengan pantai atau daratan. Kata kunci: Perairan Genuk, polutan, tingkat pencemaran, sebaran

oai:ojs.ejournal.undip.ac.id:article/38273 2021-09-19T19:04:11Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/38273 2021-09-19T19:04:11Z Buletin Oseanografi Marina Vol 10, No 3 (2021): Buletin Oseanografi Marina; 269-276 Munandar, Bayu; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Wirasatriya, Anindya; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Sugianto, Denny Nugroho; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Ambariyanto, Ambariyanto; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Sunaryo, Sunaryo; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2021-09-20 02:02:12 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/38273 Chlorophyll-a; Coastal Upwelling; Maluku Sea; Philippine Sea id Suplay massa air di Laut Filipina dan Maluku bagian utara berasal dari Samudera Pasifik. Variabilitas klorofil-a (chl-a) dapat dipengaruhi oleh suplay massa air dari suatu wilayah atau pengaruh interaksi atmosfer dan laut. Penelitian bertujuan untuk menjelaskan pengaruh interaksi atmosfer-laut terhadap variabilitas chl-a secara spasial dan temporal. Data yang digunakan yaitu data citra satelit dengan periode 2003-2019 dan argo float. Hasil menunjukkan chl-a di Laut Filipina selalu berada dibawah 0,1 mg/m3 di sepanjang tahun dan Laut Maluku bagian utara mengalami peningkatan saat musim timur (0,27 mg/m3). Kenaikan chl-a di Laut Maluku bagian utara diikuti dengan kenaikan kecepatan angin (musim timur) yang menyebabkan Ekman Mass Transport (EMT). EMT bergerak kearah timur laut yang membawa massa air menjauhi pantai dan terjadi proses coastal upwelling. Coastal upwelling inilah menjadi faktor utama peningkatan chl-a di Laut Maluku bagian utara. Sebaliknya, kenaikan kecepatan angin di Laut Filipina tidak membangkitkan EMT dan tidak meningkatkan chl-a.  Chl-a yang stabil di sepanjang tahun di Laut Filipina membuktikan kecepatan angin kuat tidak terlalu dominan untuk mempengaruhi variabilitas chl-a. Rendahnya chl-a kemungkinan disebakan oleh massa air dari Samudera Pasifik yang dibawa oleh Arus Lintas Indonesia (ARLINDO). Water mass supply in the Philippine Sea and northern Maluku derived from the Pasific Ocean. The variability of chlorophyll-a (chl-a) was affected by the supply of water mass from the area or the impact of air and sea interactions. This study aimed to define the effect of air-sea interaction on the spatial and temporal variability of chl-a. The required data in this study was satellite image data with the period 2003-2019 and argo float. The results showed that chl-a in the Philippine Sea was always below 0.1 mg / m3 throughout the year and the northern Maluku Sea increased during the eastern monsoon (0.27 mg / m3). The increasing of chl-a in the northern Maluku Sea was followed by the increasing of wind speed (east monsoon) which impacted the Ekman Mass Transport (EMT). EMT moved to the northeast carrying the water mass away from the coast and turned up coastal upwelling process. Coastal upwelling was the main factor of chl-a increasing in the North Maluku Sea. In otherwise, wind speed increasing in the Philippine Sea caused vertical mixing (west monsoon) but did not increase chl-a. The stable value of chl-a throughout the years in the Philippine Sea verified that strong wind speeds are not too dominant to affect the variability of chl-a.. The low chl-a was probably caused by the water mass from the Pacific Ocean that carried by Indonesian Through Flow (ARLINDO).

oai:ojs.ejournal.undip.ac.id:article/60285 2026-02-11T04:53:31Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/60285 2026-02-11T04:53:31Z Buletin Oseanografi Marina Vol 14, No 1 (2025): Buletin Oseanografi Marina; 23-36 https://ejournal.undip.ac.id/index.php/buloma/article/download/60285/194255 Alamsyah, M. Zanugera; Departemen Oseanografi Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro UKM-F REGISTER, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro, Rizqullah, Fairus Jamil; Departemen Oseanografi Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro UKM-F REGISTER, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Sulhana, Baiq Lista Azkia; Departemen Oseanografi Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro UKM-F REGISTER, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Maulana, Refaldi Rizky; Departemen Oseanografi Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro UKM-F REGISTER, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Cahyaningtyas, Annisa Dianti; Departemen Oseanografi Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro UKM-F REGISTER, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Rahmalia, Fahri; Departemen Oseanografi Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro UKM-F REGISTER, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Mustaqim, Ikhsan; Departemen Oseanografi Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro UKM-F REGISTER, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Fadhillah, Shafa Nur; Departemen Oseanografi Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro UKM-F REGISTER, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Baskara, Ganesha Lagas; Departemen Oseanografi Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro UKM-F REGISTER, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Kunarso, Kunarso; Departemen Oseanografi Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2025-02-20 05:07:25 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/60285 ENSO; Evaporasi; Presipitasi; Selat Makassar id Penelitian ini menganalisis pengaruh ENSO terhadap presipitasi dan evaporasi di Selat Makassar. Data yang digunakan berupa data presipitasi dan evaporasi diperoleh dari The European Centre for Medium-Range Weather Forecast (ECMWF) serta data ONI (Oceanic Niño Index) dari National Oceanic and Atmospheric Administration (NOAA) selama 15 tahun dari 2008 - 2022. Analisis korelasi pearson digunakan untuk mengukur kekuatan dan arah hubungan linier variabel ENSO terhadap presipitasi dan evaporasi. Hasil analisis menunjukkan bahwa secara klimatologis dan spasial, presipitasi  maupun evaporasi mengalami maksimum minimum yang sama. Pengaruh ENSO sendiri terhadap presipitasi dan evaporasi di Selat Makassar secara umum menunjukkan pola korelasi yang kompleks dan bervariasi sepanjang  tahun, dengan perbedaan yang signifikan di tiga wilayah, yaitu Selatan, Tengah, dan Utara. Keadaan presipitasi dan evaporasi di Selat Makassar selama 15 tahun terakhir tidak secara signifikan dipengaruhi oleh El Niño dan La Niña. Hal tersebut diduga karena letak Selat Makassar sendiri berada di wilayah yang  dipengaruhi oleh beberapa fenomena atmosfer global lainnya seperti munsonal, MJO, dan IOD.

oai:ojs.ejournal.undip.ac.id:article/15740 2020-04-17T12:03:44Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/15740 2020-04-17T12:03:44Z Buletin Oseanografi Marina Vol 6, No 1 (2017): Buletin Oseanografi Marina; 39-45 Maslukah, Lilik; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Wulandari, Sri Yulina; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Yasrida, Aryani; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2017-08-28 16:35:23 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/15740 Karbon Organik; Fosfor Organik; Sedimen Dasar; Rasio OC/OP id Sedimen dasar diambil dari estuari Banjir Kanal Barat Semarang. Metode pengabuan digunakan untuk menentukan  karbon organik dan fosfor organik. Hasil penelitian menunjukkan bahwa konsentrasi karbon organik berkisar antara 0,07-0,71% dengan nilai rerata 0,34% dan konsentrasi fosfor organik antara 1,0-3,4 µmol.gr-1dengan nilai rerata 1,98 µmol.gr-1. Hasil perhitungan rasio OC/OP menunjukkan kisaran 2,3-358 dengan nilai rerata 169. Sumber utama material organik dalam sedimen berasal dari daratan dan unsur P lebih reaktif daripada karbon. Keberadaan OC tidak langsung menentukan distribusi OP. Selain organik karbon, distribusi OP dipengaruhi oleh jenis sedimen dan parameter lain seperti arus dan kedalaman. The bottom of sediment is taken from the estuary Banjir Kanal Barat, Semarang. Spying method used to determine organic carbon and the organic phosphorus. The results showed that the concentration of organic carbon ranged between 0.07-0.71 %  with an average value 0,34% and concentration of organic phosphorus between 1,0-3,4 µmol.gr-1 with an average value 1,98 µmol.gr-1. OC / OP ratio calculation results show the range of 2,3-358 with mean value 169. The main source of organic material in the sediment comes from the teresstrial and the P element is more reactive than carbon. The existence of OC indirectly determines the distribution of OP. In addition to organic carbon, the OP distribution is influenced by sedyment type and other parameters such as current and depth.

oai:ojs.ejournal.undip.ac.id:article/41125 2023-01-25T06:05:53Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/41125 2023-01-25T06:05:53Z Buletin Oseanografi Marina Vol 11, No 3 (2022): Buletin Oseanografi Marina; 255-262 Rachman, Reno Arief; Pusat Riset Teknologi Hidrodinamika, Badan Riset dan Inovasi Nasional Wibowo, Mardi; Pusat Riset Teknologi Hidrodinamika, Badan Riset dan Inovasi Nasional 2022-10-01 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/41125 baku mutu; kecepatan endap; sedimen tersuspensi; sedimentasi; Sungailiat id Sungai Jelitik merupakan sungai utama dan urat nadi perekonomian Kecamatan Sungailiat, Kabupaten Bangka. Muara Sungai Jelitik termasuk dalam kawasan rencana pengembangan Kawasan Ekonomi Khusus (KEK) Pariwisata Sungailiat. Selain itu, Pelabuhan Perikanan Sungailiat juga terletak di alur Sungai Jelitik dan akan dikembangkan sebagai kawasan industri. Permasalahan utama yang dijumpai saat ini adalah sedimentasi di mulut muara S Jelitik yang diantaranya terkait konsentrasi sedimen tersuspensi. Oleh karena itu sebagai langkah awal dilakukan kajian tentang sedimen tersuspensi (TSS) ini. Metode kajian ini adalah pengambilan sampel air, analisis laboratorium dan analisis data. Kandungan TSS di perairan sekitar muara S Jelitik berkisar 65–250 mg/l dengan nilai rerata 128,28 mg/l, hal ini menunjukkan bahwa perairan di sekitar muara S Jelitik tidak memenuhi baku mutu baik untuk budidaya biota, untuk wisata maupun untuk pelabuhan berdasarkan PP 22 tahun 2021. Konsentrasi TSS di bagian tengah kedalaman sedikit lebih tinggi dibandingkan dengan konsentrasi TSS di bagian bawah kedalaman air laut. Kecepatan endap padatan tersuspensi di muara S Jelitik berkisar antara 0,0197–0,0858 mm/dt, dengan nilai rata-rata sekitar 0,0399 mm/dt. Sehingga sedimen tersebut baru terendapkan ke dasar perairan setelah 75.187 detik (20,88 jam) atau sekitar 0,87 hari apabila kondisi arusnya tenang.  The Jelitik River is the main river of Sungailiat District, Bangka Regency. The Jelitik River Estuary is included in the area of the Sungailiat Tourism Special Economic (KEK) development area. Besides, Sungailiat Fishing Port is located in the Jelitik River channel and will be developed as an industrial area. The main problem currently encountered is sedimentation at the mouth of the S Jelitik estuary. Sedimentation is strongly associated with turbidity and suspended sediment concentration. Therefore, as a first step, a study of this suspended sediment is carried out. The method of this study is water sampling, laboratory analysis, and data analysis. The TSS value in the waters around the S Jelitik estuary ranges from 65 - 250 mg/l with a mean value of 128.28 mg/l, this indicates that the waters around the S Jelitik estuary do not meet quality standards both for biota cultivation, for tourism and ports base on Government Regulation 22/2021. The TSS concentration at the center of the depth is slightly higher than the TSS concentration at the bottom of the seawater depth. The sedimentation rate of suspended solids in the S Jelitik estuary ranged from 0.0197 - 0.0858 mm/s, with an average value of about 0.0399 mm/s. So that the sediment is just deposited to the bottom of the water after 75,187 seconds (20.88 hours) or about 0.87 days if the current conditions are calm.

oai:ojs.ejournal.undip.ac.id:article/6910 2014-05-20T02:38:25Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6910 2014-05-20T02:38:25Z Buletin Oseanografi Marina Vol 1, No 5 (2012): Buletin Oseanografi Marina; 10-14 Suryono, Chrisna Adhi; Jurusan Ilmu Kelautan Universitas Diponegoro 2012-10-10 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6910 en Pelepasan spora dari Gracilaria dapat dipengaruhi oleh kondisi lingkungan seperti suhu dan salinitas.  Perubahan suhu dan salinitas dapat merangsang membukanya dinding karpospora sehingga spora dapat lepas.  Tujuan dari penelitian ini adalah untuk mengetahui suhu dan salinitas yang tepat untuk pelepasan spora.  Rancangan yang digunakan dalam penelitian ini adalah rancangan acak lengkap dengan perlakuan kejut suhu (25oC, 27oC, 29oC, 25oC, 31oC, dan 33oC).  Sedangkan untuk perlakuan kejut salinitas (28 ppt, 30 ppt, 32 ppt, 34 ppt dan 36 ppt). Spora yang banyak terlepas selama penelitian terlihat pada kejut suhu 31oC sedangkan yang terendah pada kejut suhu 25oC (kontrol).  Sedangkan untuk kejut salinitas jumlah spora terbanyak yang lepas pada kejut salinitas 34 ppt dan terendah pada salinitas 28 ppt (kontrol). Kata kunci : Kejut suhu, kejut salinitas, spora, Gracilaria gigas

oai:ojs.ejournal.undip.ac.id:article/69136 2025-10-18T08:20:06Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/69136 2025-10-18T08:20:06Z Buletin Oseanografi Marina Vol 14, No 3 (2025): Buletin Oseanografi Marina; 449-456 Fauziyah, Gina; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Yulianto, Bambang; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Subagiyo, Subagiyo; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2025-10-18 15:20:04 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/69136 akumulasi; depurasi; mikroplastik; kerang hijau id Penelitian ini bertujuan untuk menganalisis kelimpahan dan karakteristik mikroplastik (MP) yang terakumulasi pada kerang hijau (Perna viridis) dari empat lokasi di Kota Semarang, serta mengevaluasi efektivitas depurasi dalam mengurangi kandungan MP. Penelitian dilakukan menggunakan metode deskriptif-analitik dan eksperimental. Sampel kerang dibedakan berdasarkan ukuran (kecil 2–5 cm dan besar >5 cm), masing-masing sebanyak 15 ekor dari setiap lokasi. Mikroplastik dianalisis menggunakan mikroskop stereo melalui teknik pencacahan visual, berdasarkan bentuk, warna, dan ukuran partikel. Depurasi dilakukan terhadap 15 ekor kerang dari lokasi budidaya Tambak Lorok selama 96 jam menggunakan sistem sirkulasi air laut yang telah didesinfeksi, dengan pengamatan setiap 24 jam. Hasil penelitian menunjukkan bahwa kelimpahan MP tertinggi pada kerang kecil ditemukan di BTL ST.3 (13.892,97 ± 6700,45 partikel/kg) dan pada kerang besar di PTL (14.469,49 ± 746,38 partikel/kg). Bentuk MP yang teridentifikasi meliputi fiber, film, fragmen, dan pelet, dengan warna dominan merah, cokelat, biru, dan hitam. Proses depurasi menunjukkan penurunan jumlah partikel MP dari 44 menjadi 6,8 partikel/kerang, dengan efektivitas sebesar 88,28% pada jam ke-96. Hasil ini menunjukkan bahwa kerang hijau di seluruh lokasi telah terkontaminasi MP, namun kandungannya dapat dikurangi secara signifikan melalui proses depurasi

oai:ojs.ejournal.undip.ac.id:article/21974 2020-04-25T06:17:18Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/21974 2020-04-25T06:17:18Z Buletin Oseanografi Marina Vol 8, No 1 (2019): Buletin Oseanografi Marina; 1-8 Wiyarsih, Budhy; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Endrawati, Hadi; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Sedjati, Sri; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2019-04-19 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/21974 Komposisi; Kelimpahan; Fitoplankton; Laguna Segara Anakan id Segara Anakan merupakan laguna yang terletak di selatan Pulau Jawa tepatnya di perbatasan antara Jawa Barat dengan Jawa Tengah. Kawasan Segara Anakan merupakan tempat bertemunya sungai besar, sehingga mengalami perubahan penurunan kualitas perairan berupa penyempitan dan pedangkalan akibat proses sedimentasi yang tinggi. Hal ini dikhawatirkan dapat mengakibatkan menurunnya kualitas perairan yang dapat mengganggu pertumbuhan fitoplankton di perairan. Fitoplankton merupakan parameter biologi yang dapat dijadikan bioindikator untuk mengevaluasi kualitas dan tingkat kesuburan suatu perairan. Kondisi tentang lingkungan perairan diperkirakan berubah sepanjang waktu, maka perlu penelitian fitoplankton, untuk mengetahui tingkat kesuburan perairannya. Tujuan dari penelitian ini adalah untuk mengetahui komposisi dan kelimpahan fitoplankton di Laguna Segara Anakan, Cilacap. Penelitian ini menggunakan metode deskriptif eksploratif dengan pengambilan data menggunakan purposive sampling method. Hasil menunjukkan ditemukan 34 genera yaitu Kelas Bacillariophyceae (21 genera), Kelas Cyanophyceae (4 genera), Dinophyceae (6 genera), Chlorophyceae (2 genera), dan Euglenophyceae (1 genus). Kelimpahan fitoplankton berkisar antara 12.945,8-38.194,1 sel/liter. Indeks Keanekaragaman termasuk kategori sedang dengan nilai berkisar 1,60 - 2,32. Indeks keseragaman termasuk kategori sedang hingga tinggi, dengan nilai berkisar 0,59 - 0,81. Indeks dominansi berkisar antara 0,18 - 0,44. menunjukkan bahwa tidak ada genus yang mendominasi. Segara Anakan is a lagoon located in the south of Java Island precisely on the border between West Java and Central Java. Segara Anakan area is the place where the big river meets. Water quality decrease because of narrowing the lagoon due to the high sedimentation process. This may affect the presence of phytoplankton in the water. The quality and the fertility level of aquatic can be evaluated through the phytoplankton existence since phytoplankton is used as a biological indicator for the marine environment. The condition of the aquatic environment is expected to change over time, so it is necessary to study phytoplankton. The purpose of this research is to know about the composition and abundance of phytoplankton in Segara Anakan Lagoon, Cilacap. This research used the descriptive explorative method by data sampling using purposive sampling method. The study showed 34 genera of Bacillariophyceae (21 genera), Cyanophyceae (4 genera), Dinophyceae (6 genera), Chlorophyceae (2 genera), and Euglenophyceae (1 genus). The abundance of phytoplankton ranging from 12.945,8-38.194,1 cells/liter. The Diversity Index is a medium category with values ranging from 1.60 to 2.32. The evenness index is moderate to high, with values ranging from 0.59 to 0.81. The Dominant index ranges from 0.18 to 0.44. The value indicates the category of no dominating genus.

oai:ojs.ejournal.undip.ac.id:article/54021 2023-06-20T04:50:15Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/54021 2023-06-20T04:50:15Z Buletin Oseanografi Marina Vol 12, No 2 (2023): Buletin Oseanografi Marina; 223-230 Jumsar, Jumsar; Magister Manajemen Sumber daya Pantai, Universitas Diponegoro Muskananfola, Max Rudolf; Departemen Sumber Daya Akuatik, Fakultas Prikanan dan Ilmu Kelautan, Universitas Diponegoro Wirasatriya, Anindya; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Pusat Kajian Mitigasi Bencana dan Rehabilitasi Pesisir, Universitas Diponegoro 2023-06-20 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/54021 Klorofil-a; Suhu Permukaan Laut' Ikan Cakalang; Laut Sawu; Aqua MODIS id Ikan Cakalang (Katsuwonus Pelamis) merupakan salah satu sumber daya ikan pelagis yang melimpah di Laut Sawu. Dengan semakin meningkatnya permintaan pasar ekspor, perlu adanya peningkatan produksi tangkap ikan Cakalang agar optimal namun tetap lestari. Salah satu upaya yang dapat dilakukan adalah dengan mengetahui kondisi lingkungan berupa parameter oseanografi antara lain klorofil-a dan suhu permukaan laut (SPL). Adapun tujuan yang ingin dicapai dari penelitian ini adalah untuk melakukan analisis spasial dan temporal terhadap hasil tangkapan ikan Cakalang di Laut Sawu dan hubungannya dengan klorofil-a dan SPL. Penelitian dilaksanakan dengan menggunakan data klorofil-a dan SPL dari satelit dan data tangkapan Cakalang selama 2 tahun (2015-2016) di Laut Sawu. Hasil penelitian menunjukkan bahwa fishing ground ikan Cakalang terkonsentrasi di sebelah utara dan selatan Pulau Rote sampai Kupang yang menandakan belum optimalnya fishing ground Cakalang di Laut Sawu karena masih terkonsentrasi pada 2 area. Hasil analisis korelasi menunjukkan bahwa catch per unit effort (CPUE) ikan Cakalang tinggi pada kondisi klorofil-a tinggi dan SPL rendah sebaliknya klorofil-a yang rendah dan SPL yang tinggi menyebabkan CPUE rendah. Secara temporal CPUE ikan Cakalang tinggi pada musim peralihan dan timur, puncaknya terjadi pada bulan Agustus karena proses upwelling yang menyebabkan naiknya klorofil-a dan turunnya SPL. Secara spasial klorofil-a tinggi dan SPL rendah terdapat di sebelah utara dan selatan Pulau Rote sampai Pulau Timor, sepanjang pantai utara Pulau Flores sampai Alor, dan sebelah selatan Pulau Sumba. Oleh karena itu perlu adanya eksplorasi daerah tangkapan baru di wilayah-wilayah tersebut untuk mengoptimalkan hasil tangkapan Cakalang di Laut Sawu.  Skipjak tuna is one of abundant pelagic fish resources in the Savu Sea. The increasing export demand of Skipjack tuna needs to optimize of Skipjack tuna production in sustainable catch. Understanding the environmental aspects such as chlorophyll-a and sea surface temperature (SST) is one of the key for increasing Skipjack tuna catches. This study aims to conduct spatio-temporal analysis of Skipjack tuna catches and its relation with chlorophyll-a and SST. We used satellite-based chlorophyll-a and SST data; and Skipjack tuna catches from 2015 to 2016 in the Savu Sea. The result shows that Skipjack tuna fishing ground is concentrated along the southern and northern parts of Rote Island to Kupang which indicates that the fishing ground has not been optimal yet since it is only concentrated in 2 locations. The correlation analysis shows that the high catch per unit effort (CPUE) of Skipjack tuna is high in the condition of high chlorophyll-a and SST and vice versa. Temporally, high CPUE occurs during transition season and southeast monsoon season and peak in August due to gthe upwelling process that increase chlorophyll-a and decrease SST. Spatially, high chlorophyll-a and low SST areas are located along the southern and northern parts of Rote Island to Timor Island, along the southern parts of Flores Island to Alor Island, and the southern part of Sumba Island. Therefore, it is needed to explore new fishing grounds at those locations to optimize Skipjack tuna catches in the Savu Sea

oai:ojs.ejournal.undip.ac.id:article/6946 2014-05-22T07:39:40Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6946 2014-05-22T07:39:40Z Buletin Oseanografi Marina Vol 2, No 3 (2013): Buletin Oseanografi Marina; 12-20 Pilly, Afrinal; Mahasiswa Jurusan Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro Ambariyanto, Ambariyanto; Program studi Ilmu Kelautan, Jurusan Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro Wijayanti, Diah Permata; Program studi Ilmu Kelautan, Jurusan Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro 2013-07-22 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6946 en Metamorfosis dan penempelan adalah langkah penting dalam siklus hidup dari banyak invertebrata laut. Metamorfosis dan penempelan menyertai perubahan tahap-tahap morfologi dan cara hidup larva planula. Larva planula memulai kehidupan bentik menjadi bentuk dewasa dengan mendeteksi lingkungan untuk memilih tempat yang tepat untuk hidup menetap dan memulai proses metamorphosis dan penempelan. Lithophyllum sp merupakan Alga koralin yang diketahui sebagai pemicu metamorfosis alami. Beberapa senyawa yang berasal dari alga koralin diduga mampu menginduksi proses metamorfosis dan penempelan planula dengan menyerupai isyarat lingkungan di alam Hasil menunjukkan mampu menginduksi metamorfosis dan penempelan planula yang berasal dari slick (kumpulan gamet di permukaan laut setelah peristiwa spawning karang multi spesifik). Slick dikoleksi dari Pulau Sambangan, Kepulauan Karimunjawa saat spawning masal terjadi pada bulan Maret. Seluruh dosis yang dicobakan mampu menginduksi proses metamorfosis dan penempelan planula larva setelah planula diinkubasi dalam media yang telah diberi ekstrak Lithophyllum sp. Hasil ini memberi peluang dilakukannya pembenihan larva planulae secara masal untuk keperluan restorasi terumbu karang dan budidaya karang.   Kata Kunci : Metamorfosis, penempelan, Lithophyllum sp, planulae

oai:ojs.ejournal.undip.ac.id:article/62719 2024-07-04T18:54:21Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/62719 2024-07-04T18:54:21Z Buletin Oseanografi Marina Vol 13, No 2 (2024): Buletin Oseanografi Marina; 279-290 Putri, Khoirunnisa Azzahra; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Ulumuddin, Yaya Ihya; Pusat Penelitian Oseanografi, Badan Riset dan Inovasi Nasional Maslukah, Lilik; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Wulandari, Sri Yulina; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2024-06-05 22:58:09 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/62719 Karbon organik; sedimen; mangrove; Segara Anakan id Konsentrasi CO2 yang meningkat menyebabkan perubahan iklim dunia. Mangrove memiliki kontribusi besar sebagai penyerap karbon dari atmosfer di lingkungan pesisir dan menyimpannya dalam sedimen maupun biomassa. Penyimpanan karbon dalam sedimen dipengaruhi oleh sumber (termasuk jenis spesiesnya) dan perubahan faktor lingkungan sehingga menyebabkan adanya fluktuasi. Dengan ditemukannya 26 spesies mangrove pohon dan 5 spesies understorey (Aegiceras corniculatum, Avicennia alba dan Nypa fruticans) di Laguna Segara Anakan, maka  perlu dilakukan penelitian terkait pola variasi stok karbon secara spasial dan temporal (vertikal). Penentuan lokasi stasiun berdasarkan peta stratifikasi tutupan mangrove, yaitu kelas mangrove pohon, mangrove nypa, vegetasi mangrove mix dan mangrove understorey. Parameter yang diukur yaitu karbon organik sedimen, ukuran butir sedimen, dan pasang surut. Karbon organik dianalisis menggunakan metode Lost on Ignition (LOI), ukuran butir sedimen dengan particle size analyzer, dan pasang surut diperoleh dari Badan Informasi Geospasial. Hasil penelitian menunjukkan stok rerata karbon organik pada kelas vegetasi mix yaitu 366,783 ton/ha, kelas mangrove understorey sebesar 343,747 ton/ha, kelas mangrove nipah sebesar 298,002 ton/ha dan kelas mangrove pohon sebesar 264,108 ton/ha. Variasi nilai tersebut dipengaruhi oleh ukuran butir dan jenis mangrove. Hasil penelitian ini akan bermanfaat dalam pertimbangan jenis mangrove yang ditanam sebagai bahan kajian dalam mitigasi perubahan iklim global.   The increasing concentration of CO2 is causing global climate change. Mangroves have a major contribution as carbon sequestration from the atmosphere in coastal environments and stored it in sediments and biomass. The storage of carbon in sediments is influenced by environmental factors and their sources (including the type of species), causing carbon fluctuations. With the discovery of 26 tree mangrove species and 5 understorey species (Aegiceras corniculatum, Avicennia alba, and Nypa fruticans) in Segara Anakan Lagoon, it is necessary to conduct research related to the pattern of spatial-vertical variation of carbon stocks. The selection of stations was based on a stratification map of mangrove cover, namely tree mangrove, nypa mangrove, mixed mangrove vegetation, and understorey mangrove. Parameters measured included organic carbon and sediment grain size using the Lost on Ignition (LOI) method and a particle size analyzer. Tidal data was obtained from the Geospatial Information Agency. The results showed the average stock of organic carbon vertically in the mixed vegetation class was 366.783 tonnes/ha, the understorey mangrove class was 343.747 tonnes/ha, nipah mangrove class was 298.002 tonnes/ha and the tree mangrove class was 264.108 tonnes/ha. The variations in values are influenced by grain size and mangrove type. The variation in value is influenced by grain size and mangrove type. The results of this study will be useful in considering the type of mangrove planted as a study material in mitigation for mitigating global climate change.

oai:ojs.ejournal.undip.ac.id:article/53045 2023-11-04T02:49:24Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/53045 2023-11-04T02:49:24Z Buletin Oseanografi Marina Vol 12, No 3 (2023): Buletin Oseanografi Marina; 325-330 Wibowo, Eko Setio; Fakultas Biologi, Universitas Jenderal Soedirman Atang, Atang; Fakultas Biologi, Universitas Jenderal Soedirman Palupi, Endah Sri; Fakultas Biologi, Universitas Jenderal Soedirman Setiyono, Eko; Fakultas Biologi, Universitas Jenderal Soedirman Susilo, Untung; Fakultas Biologi, Universitas Jenderal Soedirman 2023-10-01 06:25:39 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/53045 Cilacap; Diopatra sp.; lemak pakan udang; protein id Polychaeta Diopatra sp. banyak ditemukan di daerah kawasan mangrove Cilacap dan banyak dimanfaatkan sebagai umpan.  Pengambilan polychaeta secara masif dari habitatnya untuk tujuan komersial dianggap tidak berkelanjutan bagi lingkungan, karena berkontribusi pada menipisnya sumber daya alam.  Pemanfaatan cacing ini sebagai umpan sudah banyak dilakukan tetapi masih belum banyak informasi tentang kandungan nutrisinya, sehingga perlu dilakukan studi tentang kandungan nutrisi cacing Diopatra sp untuk dimanfaatkan menjadi bahan pakan udang di wilayah ini sebagai informasi usaha pengembangan budidaya.  Penelitian ini dilakukan dengan metode survei. Pengambilan sampel dilakukan di daerah mangrove Jeruklegi kabupaten Cilacap dalam empat stasiun dengan tiga titik pengambilan sampel dan pengulangan tiga kali setiap dua minggu sekali.   Hasil penelitian menunjukkan bahwa kandungan nutrien cacing Diopatra sp. dari empat stasiun pengambilan tidak berbeda nyata (p>0,05), dengan kandungan protein rata-rata 51,07-53,66%, kandungan lemak rata-rata 6,46-9,52% dan kandungan rata-rata karbohidrat 6,47-7,55%.  Kandungan makronutrien Diopatra sp. berpotensi menjadi bahan baku pakan untuk memenuhi kebutuhan protein dan lemak budidaya udang dan ikan.  Polychaeta Diopatra sp. is commonly found in the Cilacap mangrove area and widely used as bait. Massive exploitation of polychaeta from their habitat for commercial purposes is considered unsustainable for the environment, as it contributes to the depletion of natural resources. The use of these worms as bait has been widely carried out but there is still not much information about their nutritional content, so it is necessary to study the nutritional content of Diopatra sp. worms to be used as shrimp feed ingredients in this region as information on aquaculture development efforts. This research was conducted by survey method. Sampling was carried out in the Jeruklegi mangrove area, Cilacap district in four stations with three sampling points and repeated three times every two weeks. The results showed that the nutrient content of Diopatra sp. from the four sampling stations was not significantly different (p>0.05), with an average protein content of 51.07-53.66%, an average fat content of 6.46-9.52% and an average carbohydrate content of 6.47-7.55%. Diopatra sp.'s macronutrient content can potentially be a raw material for feed to meet the protein and fat needs of shrimp and fish farming. 

oai:ojs.ejournal.undip.ac.id:article/31616 2021-06-08T16:31:12Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/31616 2021-06-08T16:31:12Z Buletin Oseanografi Marina Vol 10, No 2 (2021): Buletin Oseanografi Marina; 180-188 Nuraini, Ria Azizah Tri; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Pringgenies, Delianis; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Suryono, Chrisna Adhi; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Adhari, Vicencius Hendra; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2021-05-22 17:24:30 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/31616 Simpanan Karbon; Serapan Karbon; Mangrove; Tegakan id Hutan Mangrove merupakan suatu ekosistem laut yang memiliki peran penting sebagai penyimpan karbon tertinggi di wilayah tropis. Fungsi mangrove ini dapat membantu dalam mengurangi emisi karbon dan pemanasan global. Pulau Nyamuk dan Pulau Parang merupakan vegtasi alami yang mengalami penurunan luasan mangrove yang diduga disebabkan oleh alih fungsi lahan, sehingga akan menyebabkan penurunan fungsi mangrove dalam menyerap CO2. Tujuan dilakukannya penelitian ini adalah menganalisis dan menduga total simpanan karbon dan serapan CO2 pada tegakan mangrove di Pulau Nyamuk dan Pulau Parang. Manfaat dilakukanya penelitian ini adalah memberikan informasi mengenai manfaat mangrove sebagai penyerap karbon. Pengambilan data yang dilakukan dalam penelitian ini menggunakan purposive sampling method, dimana setiap lokasi memiliki 3 stasiun (Pulau Nyamuk; Sareh Besar, Sareh Kecil, Ujung; Pulau Parang: Batu Merah, Plawangan, Batu Hitam). Setiap stasiun dibagi menjadi 3 plot untuk dilakukan pengambilan data diameter batang mangrove. Data diameter batang mangrove digunakan untuk menghitung nilai biomasssa tegakan dengan menggunakan rumus allometrik dalam menduga simpanan karbon pada tegakan mangrove suatu area. Hasil penelitian menunjukan bahwa simpanan total karbon pada tegakan mangrove di Pulau Nyamuk memiliki nilai 1.176,48 ton/ha, yang dibagi sebagai berikut: Stsiun Sareh Kecil: 383,16 ton/ha, Stasiun Sareh Besar: 419,51 ton/ha, dan Stasiun Ujung: 373,81 ton/ha, sedangkan di Pulau Parang memiliki nilai 2009.031 ton/ha, yang dibagi sebagai berikut: Stasiun Batu Merah 767,672 ton/ha, Stasiun Batu Hitam 654,444 ton/ha, dan Stasiun Plawangan 586,915. Mangrove Forest is a marine ecosystem that has an important role as the highest carbon storage in the tropics. This mangrove function can help in reducing carbon emissions and global warming. Nyamuk Island and Parang Island are natural vegetation which decrease mangrove area which is caused by land conversion function, so it will cause mangrove function to absorb CO2. The purpose of this research is to analyze and estimate total carbon storage and CO2 uptake on mangrove stands in Nyamuk Island and Parang Island. The benefit of this research is to provide information about the benefits of mangroves as carbon sinks. The data collected in this research using purposive sampling methods, where each location has 3 stations (Nyamuk Island: Sareh Besar, Sareh Kecil, Ujung; Parang Island: Batu Merah, Plawangan, Batu Hitam). Each station is divided into 3 plots for data collection of mangrove stems diameter. The mangrove stem diameter data were used to calculate the stand biomass value by using allometric formula in estimating carbon stock in the mangrove stand of an areas. The results of research, that total carbon deposits in mangrove stands in Nyamuk Island had a value of 1,176.48 tons/ha, divided as follows: Sareh Kecil Station: 383.16 tons / ha, Sareh Besar Station: 419.51 tons / ha, and Ujung Station: 373,81 ton / ha, while in Parang Island has value 2009.031 ton / ha, which is divided as follows: Batu Merah Station 767,672 ton / ha, Batu Hitam Station 654,444 ton / ha, and Plawangan Station 586,915.

oai:ojs.ejournal.undip.ac.id:article/65797 2024-11-04T07:16:45Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/65797 2024-11-04T07:16:45Z Buletin Oseanografi Marina Vol 13, No 3 (2024): Buletin Oseanografi Marina; 475-489 Sinaga, Boby Christian; Magister Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Wirasatriya, Anindya; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Helmi, Muhammad; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2024-10-30 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/65797 Siklon Tropis Lili; Klorofil-a; Suhu Permukaan Laut; Angin; Ekman Pumping Velocity id  Siklon Tropis Lili terjadi mulai tanggal 27 April hingga 30 April 2017, merupakan siklon yang melintasi Laut Timor. Analisis siklon tropis Lili terhadap parameter klorofil-a dan suhu permukaan laut dilakukan dengan data penginderaan jauh dan reanalisis selama empat belas tahun digunakan untuk menganalisis variabilitas konsentrasi klorofil-a dan suhu permukaan laut (SST). Dataset yang digunakan termasuk Copernicus Glob-Colour untuk klorofil-a dan Optimally Interpolated Sea Surface Temperature (OISST) untuk SST. Data angin dari Cross-Calibrated Multi-Platform (CCMP) juga digunakan untuk menilai angin dan kecepatan pemompaan Ekman (EPV) sebagai parameter siklon tropis. Data dianalisis secara spasial dan temporal serta anomali dihitung untuk setiap parameter. Analisis korelasi dilakukan selama fase pembentukan, puncak, dan peluruhan Siklon Tropis Lili, dengan fokus pada Laut Timor dan wilayah dengan kecepatan angin maksimum. Hasil menunjukkan bahwa Siklon Tropis Lili mengurangi SST dan meningkatkan klorofil-a di Laut Timor. EPV negatif menyebabkan upwelling, mengurangi SST dan meningkatkan klorofil-a. Selain itu, angin kencang meningkatkan pelepasan panas laten dan penguapan, yang memengaruhi penurunan SST.   Tropical Cyclone Lili occurred from April 27 to April 30 2017, passing through the Timor Sea. Remote sensing and reanalysis data spanning fourteen years were used to analyze the variability of chlorophyll-a concentration and sea surface temperature (SST). The datasets included Copernicus Glob-Colour for chlorophyll-a and Optimally Interpolated Sea Surface Temperature (OISST) for SST. Wind data from the Cross-Calibrated Multi-Platform (CCMP) were also used to assess wind and Ekman pumping velocity (EPV) as parameters of tropical cyclones. The data were analyzed spatially and temporally, with anomalies calculated for each parameter. Correlation analysis was performed during the formation, peak, and decay phases of Tropical Cyclone Lili, focusing on the Timor Sea and the region with maximum wind speed. Results showed that Tropical Cyclone Lili reduced SST and increased chlorophyll-a in the Timor Sea. The negative EPV induced upwelling, reducing SST and increasing chlorophyll-a. Additionally, strong winds enhanced latent heat release and evaporation, further reducing SST.

oai:ojs.ejournal.undip.ac.id:article/15730 2020-04-17T12:02:54Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/15730 2020-04-17T12:02:54Z Buletin Oseanografi Marina Vol 5, No 2 (2016): Buletin Oseanografi Marina; 115-120 S, Argina Dewi; Program Studi Ilmu Kelautan, Fakultas Perikaan dan Ilmu Kelautan, Universitas Diponegoro Kampus Tembalang, Semarang 50275 Telp/ Fax 024-7474698 Endrawati, Hadi; Program Studi Ilmu Kelautan, Fakultas Perikaan dan Ilmu Kelautan, Universitas Diponegoro Kampus Tembalang, Semarang 50275 Telp/ Fax 024-7474698 Redjeki, Sri; Program Studi Ilmu Kelautan, Fakultas Perikaan dan Ilmu Kelautan, Universitas Diponegoro Kampus Tembalang, Semarang 50275 Telp/ Fax 024-7474698 2016-10-09 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/15730 en Aktivitas manusia yang merusak habitat pantai peneluran Penyu Hijau mengakibatkan penurunan populasi Penyu Hijau. Penataan tempat bertelur penyu (nesting site) dianggap hal yang penting untuk meningkatkan kembali populasi penyu hijau. Penataan tempat bertelur bagi penyu meliputi kondisi biologi. Kondisi biologi pantai peneluran merupakan hal yang penting untuk diperhatikan. Kondisi biologi pantai peneluran salah satunya adalah kondisi vegetasi pantai. Secara biologi kehadiran penyu pada suatu pantai dipengaruhi kondisi ekosistem dan komposisi vegetasi pantai. Vegetasi dianggap memiliki peranan penting dalam aktivitas peneluran penyu karena memberikan rasa nyaman pada lingkungan sekitar peneluran. Tujuan penelitian ini adalah untuk mengetahui persebaran sarang peneluran  Penyu Hijau (Chelonia mydas) berdasarkan vegetasi pantai dan mengetahui jenis vegetasi yang ada disekitar sarang Penyu Hijau. Penelitian ini menggunakan metode deskriptif. Data yang diambil meliputi data penyu bertelur, jarak sarang terhadap vegetasi dan profil vegetasi pantai. Penelitian ini dilakukan pada pukul 20.00 WIB dan 04.30 WIB sesuai dengan jadwal monitoring penyu petugas di lapangan. Hasil dari penelitian ini menunjukkan bahwa aktivitas peneluran Penyu Hijau (Chelonia mydas) lebih banyak ditemukan pada sektor dengan keadaan lingkungan bervegetasi dengan jenis vegetasi Pandanus tectorius, Baringtonia asiatica, Hibiscus tilaceus. Sedangkan pada sektor yang hanya ditumbuhi vegetasi rambat seperti Ipoemoea pes – caprae Penyu Hijau tidak ditemukan melakukan aktifitas peneluran. Kata Kunci : Penyu Hijau, Vegetasi, Pantai Sukamade.

oai:ojs.ejournal.undip.ac.id:article/39703 2022-09-07T17:08:50Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/39703 2022-09-07T17:08:50Z Buletin Oseanografi Marina Vol 11, No 2 (2022): Buletin Oseanografi Marina; 167-176 Gildantia, Elke; Program Studi Biologi, Departemen Biologi Fakultas Sains dan Matematika, Universitas Diponegoro Ferniah, Rejeki Siti; Program Studi Bioteknologi Departemen Biologi Fakultas Sains dan Matematika, Universitas Diponegoro Budiharjo, Anto; Program Studi Bioteknologi Departemen Biologi Fakultas Sains dan Matematika, Universitas Diponegoro Suprihadi, Agung; Program Studi Biologi, Departemen Biologi Fakultas Sains dan Matematika, Universitas Diponegoro Zainuri, Muhammad; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan., Universitas Diponegoro Kusumaningrum, Hermin Pancasakti; Program Studi Bioteknologi Departemen Biologi Fakultas Sains dan Matematika, Universitas Diponegoro 2022-05-20 08:04:58 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/39703 Mikroalga; 18S rDNA; Karakterisasi; Chlorella sorokiniana id Mikroalga merupakan organisme eukariot bersel satu yang habitatnya berada di perairan. Suatu spesies mikroalga koleksi kultur BBPBAP Jepara berpotensi menghasilkan astaxantin dalam jumlah tinggi. Namun, spesies ini belum di karakterisasi secara molekuler. Penelitian ini bertujuan untuk memperoleh karakter morfologi dan molekuler pada isolat mikroalga dari BBPBAP Jepara menggunakan 18S rDNA guna memastikan spesies untuk pengembangan potensinya. Tahapan penelitian yang dilakukan meliputi kultivasi mikroalga, pengamatan pola pertumbuhan, pengamatan morfologi, isolasi DNA, amplifikasi menggunakan marka 18S rDNA, elektroforesis, analisis data sekuens, dan filogenetik menggunakan aplikasi NJ Plot dan MEGA 7. Hasil karakterisasi secara morfologi sel isolat mikroalga BBPBAP Jepara memperlihatkan bentuk bulat, berwarna hijau dengan ukuran 4,5 μm, tidak memiliki flagela, dan motilitas yang pasif. Hasil karakterisasi molekuler menggunakan 18S rDNA dari isolat mikroalga BBPBAP memperlihatkan kemiripan tertinggi dengan Chlorella sorokiniana sebesar 99%.  Microalgae are single-celled eukariyotic organisms whose habitat is in the waters. A species of microalgae from the Jepara BBPBAP culture collection was potential to produce high amounts of astaxantin. However, this species has not been detected molecularly previously. This study aimed to obtain the morphological and molecular characters of microalgae isolates from BBPBAP Jepara using 18S rDNA to ascertain the species and its potential development. The stages of the research carried out include; microalgae cultivation, growth pattern observation, morphological observation, DNA isolation, amplification using 18S rDNA markers, electrophoresis, sequence data analysis, and phylogenetic using NJ Plot and MEGA applications 7. Results of morphological characterization of the Jepara BBPBAP showed that cell of microalgae isolates had a round shape, green color with a size of 4.5μm, has no flagella and passive motility. The results of the molecular characterization using 18S rDNA showed that isolate BBPBAP had highest similarity with Chlorella sorokiniana about 99%.

oai:ojs.ejournal.undip.ac.id:article/2988 2012-04-03T06:22:38Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/2988 2012-04-03T06:22:38Z Buletin Oseanografi Marina Vol 1, No 1 (2011): Buletin Oseanografi Marina Suryanti, Suryanti Supriharyono, Supriharyono Indrawan, Willy The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/2988 en Abstract Coral reefs are marine ecosystems in tropical marine life constructed by the producer of lime in particular species of stony corals and calcareous algae, together with the biota that live in the bottom of which is a types of molluscs, crustaceans, echinoderms, Polychaeta, Sponge and tunicates and marine biota others are living freely in the surrounding waters. Chaetodontidae or butterfly fish is ordinary reef fish while the distribution in surround coral reef only. The experts agreed on placing fish leadership as "indicator species" of coral reef condition, because this fish is a true coral reef inhabitants. This study aims to identify relationships between the abundance of coral reef condition Chaetodontidae fish in waters of Sambangan Islands, Karimun java, Jepara, Central Java. Research was conducted in July 2010 in waters Sambangan Island, National Park Karimunjawa. The research method is field observation method with the sampling method using the line transect method (line transect) on coral and fish transect data on fish along the 30m data. Data taken in this study are the data of physical parameters, data, coral cover and fish abundance. Results from this study showed that the percentage of coral coverage at a depth of three meters amounted to 70.92% and at a depth of 10 meters amounted to 66.05%. Closing percentage is the highest Reef on the West side of site B with a depth of three meters is equal to 82.50% while the percentage of closures of the least Reef is on the East side of site A with a depth of 10 meters that is equal to 64.80%. Types of coral reef growth that dominated in the waters of the island is Acropora Branching Sambangan. Percentage value of 16.71. The average abundance of fish on each transect Chaetodontidae with a depth of 10 meters (10 individuals / transect) is smaller than the depth of three meters (11 individuals / transect). The relationship between the abundance of fish Chaetodontidae with Closure Percentage Sambangan Coral Island at a depth of 3 meters is strong (Significant) and Positive (DC), whereas at a depth of 10 meters is a weak (non-Significant) and Positive (DC).   Keywords : percentage of coral coverage, Abundance of fish Chaetodontidae

oai:ojs.ejournal.undip.ac.id:article/68953 2025-10-18T08:20:06Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/68953 2025-10-18T08:20:06Z Buletin Oseanografi Marina Vol 14, No 3 (2025): Buletin Oseanografi Marina; 347-361 Anggraeni, Nimas Ratri Kirana; Departemen Oseanografi Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro UKM-F REGISTER, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro ALGOMARINE, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Attaqwa, Rizal; Departemen Oseanografi Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro UKM-F REGISTER, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro ALGOMARINE, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Simangunsong, Felix Gok Asi; Departemen Oseanografi Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro UKM-F REGISTER, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Gunady, Stephanie Michelle; Departemen Oseanografi Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro UKM-F REGISTER, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Maslukah, Lilik; Departemen Oseanografi Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Wirasatriya, Anindya; Departemen Oseanografi Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2025-10-18 15:20:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/68953 Marine Heatwaves; Outgoing Longwave Radiation; ENSO IOD id Marine Heatwaves (MHW) adalah kondisi meningkatnya suhu permukaan laut (SPL) secara ekstrem pada suatu periode tertentu. Fenomena MHW memberikan dampak signifikan terhadap ekosistem laut, seperti pemutihan terumbu karang, perubahan distribusi massa air, dan penurunan keanekaragaman hayati. Penelitian ini bertujuan untuk mengidentifikasi karakteristik fenomena MHW, termasuk frekuensi, durasi, dan intensitas kumulatifnya, serta menganalisis peran dinamika atmosfer seperti El Niño-Southern Oscillation (ENSO), Indian Ocean Dipole (IOD), dan Outgoing Longwave Radiation (OLR) dalam memengaruhi kemunculan MHW di Selat Sunda. Data yang digunakan berupa SPL harian dari OSTIA Marine Copernicus selama periode 1982–2021. Berdasarkan hasil analisis data selama 1982-2021 menunjukkan bahwa fenomena MHW paling parah terjadi pada tahun 1998, dengan intensitas maksimum mencapai 1,6187°C dan berlangsung selama 86 hari. Peningkatan signifikan DMI dan ONI menunjukkan pengaruh kuat dari IOD positif dan El Niño, yang menyebabkan perbedaan suhu bagian barat dan timur Samudra Hindia. Anomali OLR positif yang tinggi mencerminkan kondisi minim konveksi, sehingga mengurangi tutupan awan dan curah hujan. Kombinasi anomali ini memperparah pemanasan laut dan memperkuat intensitas serta durasi MHW, khususnya pada tahun 1998. Tren tahunan menunjukkan MHW di Selat Sunda semakin sering, lama, dan intens, menekankan pentingnya upaya mitigasi dan adaptasi terhadap dampak perubahan iklim, khususnya di wilayah pesisir yang rentan.

oai:ojs.ejournal.undip.ac.id:article/20378 2020-04-17T12:06:41Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/20378 2020-04-17T12:06:41Z Buletin Oseanografi Marina Vol 7, No 2 (2018): Buletin Oseanografi Marina; 67-74 Agung, Andita; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Zainuri, Muhammad; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Wirasatriya, Anindya; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Maslukah, Lilik; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Subardjo, Petrus; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Suryosaputro, Agus Anugroho Dwi; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Handoyo, Gentur; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2018-10-08 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/20378 fishing ground; Ikan pelagis kecil; Citra Aqua MODIS; fishing ground; small pelagis fish; id Perairan Kendal merupakan salah satu kabupaten di Jawa Tengah dengan luas wilayah ± 1.002,23  dan mengalami perkembangan pesat terutama di bidang perikanan. Perairan Kendal adalah salah satu wilayah penyebaran ikan demersal dan pelagis yang cukup potensial di perairan Utara Jawa Tengah. Tujuan penelitian ini untuk memprediksi zonasi fishing ground ikan pelagis  kecil di Perairan Kendal berdasarkan parameter klorofil-a dan suhu permukaan laut. Penelitian ini menggunakan metode kuantitatif, penentuan lokasi pengambilan sampel menggunakan metode purposive sampling. Berdasarkan hasil penelitian diketahui bahwa perairan Kendal memiliki nilai konsentrasi klorofil-a berkisar antara 0.34 – 4.86 mg/  konsentrasi tertinggi di Timur Laut muara sungai Bodri dan di ikuti dengan hasil tangkapan ikan paling banyak yaitu 53 kg. Konsentrasi suhu permukaan laut berkisar 30,5 - 31ᵒC. Perbedaan nilai konsentrasi klorofil-a dan suhu permukaan laut dipengaruhi oleh angin yang berhembus di perairan sehingga diduga mengakibatkan terjadinya proses mixing.  Analysis of Chlorophyll-A Distribution and Potential Sea Surface As Fishing Ground Temperature in Kendal Coastal, Central JavaThe waters of Kendal is one district in Central Java with an area of ± 1.002.23  and experienced rapid development, especially in the field of fisheries. The waters of Kendal is one of the potential demersal and pelagic fish distribution areas in the waters of North Central Java. The purpose of this study was to predict the potential fishing ground of small pelagic fish in Kendal Waters based on the parameters of chlorophyll-a and sea surface temperature. This research uses quantitative method while determining the location of sampling using purposive sampling method. Based on the research results it can be seen that the waters of Kendal has a value of chlorophyll-a concentration ranging from 0.34 - 4.86 mg/   with the highest concentration that is in the Northeast estuary Bodri river and followed by the catch of most fish that is 53 kg. Concentrations of sea surface temperature range from 30.5 - 31ᵒC. Differences in the value of a-chlorophyll concentration and sea-surface temperatures across the waters are influenced by winds that blow in the waters resulting in a mixing process. 

oai:ojs.ejournal.undip.ac.id:article/50094 2023-05-13T09:22:51Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/50094 2023-05-13T09:22:51Z Buletin Oseanografi Marina Vol 12, No 1 (2023): Buletin Oseanografi Marina; 133-141 Widiastuti, Widiastuti; Department of Marine Science, Faculty of Marine and Fisheries, Universitas Udayana Bangun, Sheliya Desmita Br.; Department of Marine Science, Faculty of Marine and Fisheries, Universitas Udayana Giri, Ni Luh Yustika; Department of Marine Science, Faculty of Marine and Fisheries, Universitas Udayana Fahmi, Varian; Research Center for Marine and Terrestrial Bio-Industry, National Research and Innovation Agency 2023-02-04 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/50094 Community Structure; Kodek Bay; Mariculture; Phytoplankton; Zooplankton en Mariculture is considered a future economic source for Indonesia. However, this practice may degrade the surrounding ecosystem by decreasing the water quality, including the plankton community. This study aimed to determine the community structure of plankton (phytoplankton and zooplankton) in the mariculture sites. Study sites were selected based on the mariculture activities of the Research Center for Marine and Terrestrial Bioindustry (PRBILD-BRIN) located in Kodek Bay, Lombok Island. Samplings were conducted in February 2021, zooplankton samples were collected horizontally by towing a 100 μm plankton net using a boat, whereas phytoplankton was collected using a 20 μm plankton net horizontally. The plankton samples were preserved with 4% formaldehyde, identified, and counted in a Sedgwick Rafter cell counter using an Olympus CX21 (10x). Results demonstrated that zooplankton was dominated by genera from the Subclass Copepoda (Temora sp., Microsetella sp., Euterpina sp., Oithona sp., Acartia sp., and Onceae sp.) that were significantly more abundant at Sites 1 and 2 than those at Sites 3 and 4. The diversity levels were moderate at all sites, except at site 1, which Temora dominated. Phytoplankton was mainly composed of Bacillariophyceae, followed by Dinophyceae, Chlorophyceae, and Conjugatophyceae, with no significant difference in abundance at all sites. The diversity levels were low for all phytoplankton taxa at all sites except at site 2, where Bacillariophyceae and Dinophyceae equally composed the community. It is suggested that the mariculture organisms may shape these phytoplankton and zooplankton community structures by recycling particular nutrients. 

oai:ojs.ejournal.undip.ac.id:article/6937 2014-05-22T02:18:48Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6937 2014-05-22T02:18:48Z Buletin Oseanografi Marina Vol 2, No 2 (2013): Buletin Oseanografi Marina; 35-40 Pratikto, Ibnu; Jurusan Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro 2013-04-18 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6937 en Kebutuhan pakan pada kerang hijau Perna viridis tidak hanya ditentukan oleh kwantitas namun juga oleh jenis alga tersebut.  Namun sampai sekarang belum diketahui secara jelas jenis dan jumlah alga yang tepat untuk kebutuhan kerang hijau.  Penelitian ini bertujuan untuk mengetahui jenis dan konsentrasi mikro alga terhadap kecepatan filtrasi kerang hijau yang berbeda ukuran.  Rancangan yang digunakan dalam penelitian ini adalah faktorial dengan taraf perlakuan ukuran kerang dan kepadatan mikro alga dengan jenis yang berbeda.  Rancangan faktorial 5x5 dengan 3 ulangan telah digunakan dalam penelitian ini, data yang diperoleh berupa kecepatan filtrasi dianalisa dengan balanced designs anova. Hasil penelitian menunjukan kecepatan filtrasi tertinggi terlihat pada interaksi antara kerang hijau berukuran 4cm dengan alga Skeletonema sp berkepadatan 50.000 sel/ml sedangkan kecapatan filtrasi terendah pada interaksi antara kerang hijau berukuran 2cm dengan kombinasi kepadatan antara alga Skeletonema sp 10.000 sel/ml dan Chlorella sp 40.000 sel/ml.  Hasil analisa balanced designs anova menunjukan pengaruh ukuran kerang hijau, jenis kombinasi alga dan interaksi keduanya menunjukan perbedaan yang sangat nyata (p<0,001).   Kata kunci : Perna viridis, kecepatan filtrasi, Skeletonema sp, Chlorella sp

oai:ojs.ejournal.undip.ac.id:article/24681 2020-09-27T10:49:01Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/24681 2020-09-27T10:49:01Z Buletin Oseanografi Marina Vol 9, No 1 (2020): Buletin Oseanografi Marina; 55-58 Hanani, Triana; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Widowati, Ita; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Susanto, AB; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2020-04-30 08:00:14 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/24681 Spirulina platensis; Lighting Times; Cell Growth; Beta Carotene id Spirulina platensis merupakan salah satu mikroalga yang mengandung pigmen beta karoten. Beta karoten memiliki manfaat sebagai antioksidan dan antikanker. Pertumbuhan mikroalga dipengaruhi oleh berbagai macam faktor lingkungan, salah satunya adalah cahaya. Penelitian ini bertujuan untuk menentukan lama waktu pencahayaan yang baik untuk mengoptimalkan pertumbuhan dan produksi pigmen beta karoten pada S. platensis.Metode yang digunakan adalah eksperimen laboratoris. Mikroalga S. platensis dikultivasi dengan dua perlakuan lama waktu pencahayaan yang berbeda yaitu A: 24 jam Terang dan 0 jam Gelap (24T,0G); dan B: 12 jam Terang dan 12 jam Gelap (12T, 12G). Pertumbuhan sel S. platensis diamati selama 11x24 jam kemudian dipanen. Biomassa basah hasil kultivasi dikeringkan agar mendapat biomassa kering yang akan diekstraksi menggunakan pelarut n-heksana. Ekstrak n-heksana S. platensis kemudian dianalisis kandungan pigmen beta karotennya secara spektrofotometrik.Hasil penelitian menunjukkan bahwa perlakuan perbedaan lama waktu pencahayaan tidakberpengaruh secara nyata terhadap pertumbuhan sel dan  kandungan pigmen beta karoten pada S. platensis. Pertumbuhan sel S. platensis dan kandungan beta karoten tertinggi dihasilkan oleh S. platensis yang dikultur pada pencahayaan 24 Terang dan 0 jam gelap (perlakuan A), yaitu berturut-turut 177,62 x 103 sel/mldan0,00183 µg/g. Spirulina platensis is a microalga containing beta carotene pigment. Beta carotene has the benefit of being antioxidants and anticancer. Various environmental factors influence microalgae growth; one of them is light. The purpose of this research is to determine the best lighting duration to optimize the growth and production of beta carotene pigments in S. platensis. The method used in this research was a laboratory experiment. S. platensis was cultivated with two different lighting duration treatments, i.e.A: 24 hours light, 0-hour dark (24T, 0G), and B: 12 hours light, 12 hours dark (12T, 12G). The growth of S. platensis was observed for 11x24 hours and then harvested. The biomass of S. plantesis was then dried and extracted using n-hexane and analyzed for its beta carotene pigment content spectrophotometrically. The result showed that lighting duration treatment had an insignificant effect on cell growth and beta carotene content  ofS.platensis. The optimum growth and beta carotene concentration were optimally achieved by S.  platensis cell cultivated in 24 hours light and 0 hours dark, i.e. 177,62 x 103 cell/mL, 0,00183 µg/g respectively.

oai:ojs.ejournal.undip.ac.id:article/47667 2024-05-31T07:50:39Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/47667 2024-05-31T07:50:39Z Buletin Oseanografi Marina Vol 13, No 1 (2024): Buletin Oseanografi Marina; 100-106 Arrosyd, Muhammad Azam; Departemen Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Santosa, Gunawan Widi; Departemen Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Endrawati, Hadi; Departemen Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2024-02-06 14:07:59 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/47667 Laju Pertumbuhan; Phycocyanin; Spirulina sp; Nitrogen id Spirulina sp. adalah mikroorganisme autotrof dari kelas Cyanophyta yang berbentuk filamen terpilin menyerupai spiral (helix), dan merupakan salah satu sumber pangan dan pakan yang potensial. Faktor yang mempengaruhi pertumbuhan serta kandungan pigmen salah satunya adalah nutrien. Penelitian ini bertujuan untuk mengetahui pengaruh konsentrasi urea yang berbeda terhadap laju pertumbuhan dan kandungan pigmen fikosianin pada Spirulina sp. Metode penelitian yang digunakan adalah eksperimental laboratoris dengan menggunakan Rancangan Acak Lengkap. Mikroalga Spirulina sp dikultur dengan 4 taraf perlakuan yang berbeda yaitu pemberian urea 90 mg/L, 105 mg/L, 120 mg/L, 135 mg/L dan 1ml/L pupuk Walne sebagai kontrol dengan tiga kali ulangan. Hasil penelitian menunjukkan laju pertumbuhan tertinggi pada perlakuan kontrol walne sebesar 0,697 dan terendah pada perlakuan 90 mg/L sebesar 0,447. Kandungan pigmen fikosianin tertinggi terdapat pada perlakuan kontrol walne sebesar 0,272 mg/mL disusul dengan perlakuan 120 mg/L, 105 mg/L dan 135 mg/L dengan masing-masing 0,095 mg/mL; 0,068 mg/mL dan 0,046 mg/mL. Berdasarkan hasil penelitian diproleh hasil bahwa perbedaan konsentrasi urea memiliki pengaruh terhadap laju pertumbuhan Spirulina sp. P< 0.05, namun tidak memberikan pengaruh terhadap kandungan pigmen fikosianin mikroalga Spirulina sp. P> 0.05.   Spirulina sp. is an autotrophic microorganism from the Cyanophyta class which is in the form of a spiral-like twisted filament (helix), and is a potential source of food and feed. One of the factors that affect growth and pigment content is nutrients. This study aims to determine the effect of different urea concentrations on the growth rate and content of phycocyanin pigments in Spirulina sp. The research method used was experimental laboratory using the Completely Randomized Design. Spirulina sp microalgae were cultured with 4 different levels of treatment, namely urea 90 mg/L, 105 mg/L, 120 mg/L, 135 mg/L, and 1ml/L Walne fertilizer as a control with three replications. The results showed that the highest growth rate was in the Walne control of 0.697 and the lowest was in the 90 mg/L treatment of 0.447. The highest phycocyanin pigment content was found in the Walne control of 0.272 mg/mL, followed by the 120 mg/L, 105 mg/L, and 135 mg/L treatments with 0.095 mg/mL, 0.068 mg/mL and 0.046 mg/mL,respectively. Based on the results of the study, it was found that the difference in urea concentration had effect to the growth rate of Spirulina sp.(P < 0.05), but did not have an effect on the phycocyanin content of microalgae Spirulina sp. P≥ 0.05.  

oai:ojs.ejournal.undip.ac.id:article/51276 2023-11-04T02:49:24Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/51276 2023-11-04T02:49:24Z Buletin Oseanografi Marina Vol 12, No 3 (2023): Buletin Oseanografi Marina; 413-422 Nuraini, Ria Azizah Tri; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Redjeki, Sri; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Endrawati, Hadi; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Tharieq, M. Amanun; Magister Ilmu Lingkungan, Sekolah Pascasarjana, Universitas Diponegoro 2023-10-01 08:12:38 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/51276 Rajungan betina; Egg berried female; kawasan potensial reproduksi id Rajungan betina memiliki peranan penting dalam keberlanjutan stok sumber daya rajungan di alam. Maraknya rajungan betina yang masih ditangkap oleh nelayan menjadi salah satu ancaman besar terhadap keberlanjutan sumber daya rajungan. Tujuan penelitian ini untuk mengetahui komposisi rajungan betina berdasarkan kelas lebar karapas, hubungan lebar karapas dan berat tubuh, komposisi tingkat kematangan gonad (TKG), nilai fekunditas dan persentase egg berried female (EBF) pada 20 titik area fishing ground yang dilaksanakan selama bulan Mei – Agustus 2022 di perairan Pemalang. Pengambilan sampel dan penentuan titik fishing ground dilakukan secara purposive sampling dengan menyesuaikan area penangkapan nelayan rajungan Desa Danasari, Pemalang. Distribusi ukuran lebar karapas rajungan menunjukkan modus kelas lebar karapas pada 101 – 110 mm, dimana kondisi tersebut tergolong kurang baik mengingat ukuran minimum rajungan yang boleh ditangkap adalah >100 mm. Hubungan lebar karapas dan berat tubuh menunjukkan pertumbuhan rajungan betina bersifat allometrik negatif, yang berarti pertambahan lebar karapas lebih cepat dibandingkan pertambahan berat tubuh. Komposisi TKG rajungan betina didominasi pada kondisi kematangan tingkat 2 (TKG 2) dengan persentase 78%. Nilai fekunditas rajungan betina bertelur dengan rata-rata pada kisaran 301.202±131.949 butir telur. Nilai EBF tertinggi ditemukan pada titik 12 dengan persentase 1,09% dengan rajungan betina bertelur sebanyak 7 ekor. Keberadaan rajungan betina di perairan menjadi salah satu faktor kunci keberlanjutan sumber daya rajungan, sehingga diharapkan dapat dijadikan acuan dalam penentuan area perlindungan dan kawasan potensial reproduksi rajungan di perairan Pemalang dan perairan lainnya. Female blue swimming crabs have an important role in the sustainability of crab populations of natural resources. The large number of female crabs that are still caught by fishermen is one of the major threats to the sustainability of crab resources. The purpose of this study was to determine the composition of female crab based on carapace width class, carapace width and body weight relationship, composition of gonad maturity level (TKG), fecundity value and percentage of egg berried female (EBF) at 20 spots of fishing ground area during May - August 2022 in Pemalang waters. Sampling and selection of fishing ground points were carried out by purposive sampling by adjusting the fishing area of crab fishermen in Danasari Village, Pemalang Regency. The distribution of carapace width size of crab showed the mode of carapace width class at 101 - 110 mm, where the condition is not quite good considering the minimum size of crab that can be caught is >100 mm. The relationship between carapace width and body weight shows that the growth of female crabs is negative allometric, which means that the increase in carapace width is faster than the increase in body weight. The TKG composition of female crabs is dominated by the condition of 2nd maturity level (TKG 2) with a percentage of 78%. The fecundity value of egg laying female crabs with an average in the range of 301,202±131,949 eggs. The highest EBF value was found at spot 12 with a percentage of 1,09%, with the number of egg berried female crabs are 7 individuals. The presence of female crabs in the waters is one of the key factors for the sustainability of crab resources, so it is expected to be used as a reference in determining protection and potential reproduction areas of blue swimming crabs in Pemalang waters and other waters.

oai:ojs.ejournal.undip.ac.id:article/34645 2022-05-23T00:01:28Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/34645 2022-05-23T00:01:28Z Buletin Oseanografi Marina Vol 10, No 1 (2021): Buletin Oseanografi Marina; 88-104 Mishbach, Imam; Departemen Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Zainuri, Muhammad; Departemen Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Widianingsih, Widianingsih; Departemen Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Kusumaningrum, Hermin Pancasakti; Departemen Biologi Fakultas Sains dan Matematika, Universitas Diponegoro Sugianto, Denny Nugroho; Departemen Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Pribadi, Rudhi; Departemen Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2021-02-01 10:08:12 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/34645 Nitrat; Fosfat; Fitoplankton; Sebaran; Muara Sungai Bodri; Kendal id Nitrat dan fosfat adalah unsur nutrien yang menjadi pembatas kelimpahan fitoplankton. Kandungan nitrat dan fosfat di perairan muara akan dipengaruhi oleh faktor biologi, fisika dan kimia perairan, yang menyebabkan timbulnya suatu persebaran. Hal tersebut menjadi permasalahan di Muara Sungai Bodri, Kendal. Tujuan dari penelitian ini adalah untuk mengkaji kandungan nitrat dan fosfat beserta pola persebarannya, serta keterkaitannya dengan struktur populasi fitoplankton sebagai bioindikator kesuburan perairan di Perairan Muara Sungai Bodri, Kabupaten Kendal. Penelitian dilaksanakan berdasarkan metoda observasi dengan pendekatan spatio-temporal. Sejumlah 9 stasiun penelitian dan 3 kali waktu sampling yaitu 30 Juni, 1 September dan 27 Oktober 2018. Kandungan nitrat dan fosfat serta kelimpahan fitoplankton ditetapkan sebagai variabel terikat. Sedangkan parameter fisika dan kimia perairan seperti suhu, salinitas, derajat keasaman (pH), oksigen terlarut, kecerahan dan arus ditetapkan sebagai variabel kontrol. Hasil penelitian menunjukan bahwa kandungan nitrat berkisar 0,49-0,9 mg/l serta kandungan fosfat berkisar 0,01-0,29 mg/l yang menunjukkan bahwa perairan Muara Sungai Bodri, Kabupaten Kendal dalam kondisi subur/eutrofik. Kelimpahan fitoplankton menunjukkan nilai kisaran diantara 2.356 sampai dengan 162.626 sel/l, yang tersusun oleh 5 kelas dan 45 jenis/species dengan pola persebaran berbentuk konvergen yang bertumpu pada stasiun 3 dan 5. Perairan Muara Sungai Bodri, Kabupaten Kendal menunjukkan tingkat kesuburan yang tinggi atau eutrofik.   Nitrate and Phosphate are the nutrient element which influence as limiting factor to the phytoplankton population. Nitrate and Phosphate in the water were influence by physical and chemical factors, and will affect to the distribution. The distribution of nitrate and phosphate will affect the distribution of phytoplankton population. The purpose of the research is to analyze the distribution of phytoplankton population due to the influence of nitrate and phosphate contents at Bodri Estuary, Kendal. The research was apllied based on the spatio-temporel approach. There are 9 stations and triple sampling of 30 June, 1st Septembre and 27 Octobre, 2018. The nitrate and phosphate contents and phytoplankton abundance was set as dependent variables. The parameters temperature, salinity, pH, Dissolved Oxygen, transparency and current were used as variable control. The research result show the nitrate content range between 0,49-0,9 mgr./l and the phosphate content range between 0,01-0,29 mgr./l, which indicate that the Bodri Estuary, Kendal is eutrophic. The distribution of nitrate and phosphate contens show a model of convergen on west area of sampling and tend to along the coastline in the east part. The phytoplankton abundance show a range of 2.356 - 162.626 cell /l, which composed of 5 Class and 45 species.

oai:ojs.ejournal.undip.ac.id:article/62376 2024-11-04T07:16:45Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/62376 2024-11-04T07:16:45Z Buletin Oseanografi Marina Vol 13, No 3 (2024): Buletin Oseanografi Marina; 375-383 Khoerunnisa, Rizka Nabila; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Hartati, Retno; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Nuraini, Ria Azizah Tri; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2024-10-30 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/62376 Mikroplastik; Kerang Darah; Tegillarca granosa; Ukuran Cangkang id Mikroplastik di perairan dapat tertelan dan terakumulasi dalam tubuh makhluk hidup dengan melalui proses rantai makanan. Kerang darah adalah organisme sesil yang hidupnya berada di substrat dasar perairan. Tujuan dilaksanakannya penelitian ini yakni mengidentifikasi mikroplastik di dalam kerang darah (Tegillarca granosa) dan korelasi ukuran cangkang kerang darah terhadap kelimpahan mikroplastik pada kerang darah dari TPI Bungo, Demak, dan TPI Tambaklorok, Semarang. Sampel kerang darah diperoleh dari hasil penangkapan ikan oleh nelayan TPI Bungo, Demak dan TPI Tambaklorok, Semarang pada bulan September 2023. Sampel dipisahkan antara daging kerang dan jaringan lunak. Sampel jaringan lunak didestruksi menggunakan 100 ml KOH 10% selama 24 jam, ditambahkan 10 ml ZnCl2 30% dan didiamkan selama 24 jam untuk memisahkan nathan dan supernathannya, kemudian disaring dengan kertas Whatman No. 42 dengan bantuan vacuum pump. Hasil penelitian ini menemukan mikroplastik dalam kerang darah dari TPI Bungo, Demak dan TPI Tambaklorok, Semarang, yang berbentuk fiber, film, fragment, serta pellet. Kelimpahan mikroplastik pada kerang darah dari TPI Bungo, Demak dan TPI Tambaklorok, Semarang berturut-turut pada ukuran kecil 9,63±0,98 partikel/gr dan 5,95±0,98 partikel/gr, ukuran sedang 5,66±1,16 partikel/gr dan 5,18±1,15 partikel/gr, serta ukuran besar 6,32±1,47 partikel/gr dan 5,08±1,41 partikel/gr. Sehingga disimpulkan kerang darah dari TPI Bungo, Demak dan TPI Tambaklorok, Semarang sudah terkontaminasi mikroplastik dan terdapat hubungan antara ukuran cangkang kerang darah yang berbeda terhadap kelimpahan mikroplastik pada kerang darah.  Microplastics in waters can be ingested and accumulated in the body of biota throughout the food chain cycle. Blood cockles (Tegillarca granosa) are sessile organisms that live in the bottom substrate of water. This study aims to determine the microplastics in blood cockles (Tegillarca granosa) from Fish Auction Place (FAP) of Bungo, Demak and Tambaklorok, Semarang and its relationship with the shell size. The samples were taken in September 2023. The soft tissue of samples was destructed using 100 ml of 10% KOH for 24 hours, was added with ten molliliters of 30% ZnCl2 and allow it to settle for 24 hours for separation of natant and supernatant. The samples were then filtered using Whatman paper no. 42 with a vacuum system. The microplastics were examined under microscope. The results showed the presence of microplastic in all blood cockles samples in form of fiber, film, fragment, and pellet. The density of microplastics in blood cookles from FAP of  Bungo, Demak and Tambaklorok, Semarang according to their size as follows: small 9.63±0.98 and 5.95±0.98 particles/gr, medium 5.66±1.16 and 5.18±1.15 particles/gr, and large 6.32±1.47 and 5.08±1.41 particles/gr, respectivelly. The blood cockles from FAP Bungo, Demak and Tambaklorok, Semarang have been contaminated with microplastics and there is relationship between the shell sizes and the abundance of microplastics.

oai:ojs.ejournal.undip.ac.id:article/11295 2020-04-17T12:01:53Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/11295 2020-04-17T12:01:53Z Buletin Oseanografi Marina Vol 5, No 1 (2016): Buletin Oseanografi Marina; 44-51 Putri, Gizka Anindya; Program Studi Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Zainuri, Muhammad; Program Studi Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Priyono, Bayu; Balai Penelitian dan Observasi Kelautan, Jl. Baru Perancak Negara Jembrana Bali 2016-04-03 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/11295 en Perairan Selat Karimata terletak di antara Pulau Bangka Belitung dan Kalimantan. Perairan ini menghubungkan dua perairan, yakni Laut Jawa dan Laut Cina Selatan. Dinamika kedua perairan tersebut menjadikan Selat Karimata memiliki massa air yang dinamis. Nutrien yang berasal dari Pulau Bangka Belitung dan Kalimantan menyebabkan Selat Karimata memiliki kandungan ortofosfat yang mendukung proses fotosintesa yang dilakukan oleh klorofil-a. Penelitian ini dilakukan untuk mengetahui nilai kandungan serta sebaran antara ortofosfat dan klorofil-a, serta keterkaitan antara ortofosfat dan klorofil-a di perairan Selat Karimata. Pengukuran data lapangan pada penelitian ini dilaksanakan pada 11-14 Juni 2015 di perairan Selat Karimata. Analisa sampel dilakukan di laboratorium Balai Penelitian dan Observasi Laut (BPOL) pada 22-26 Juni 2015. Pengambilan sampel pada penelitian ini dilakukan pada kedalaman 5 meter sebanyak 12 stasiun, dengan mempertimbangkan bahwa setiap stasiun akan merepresentasikan luasan tertentu dari daerah penelitian. Konsentrasi ortofosfat dan klorofil-a adalah dua variabel yang menjadi kajian utama dari beberapa variabel oseanografi yang diukur pada penelitian ini. Hasil penelitian menunjukkan nilai rata-rata ortofosfat sebesar 0,0456 mg/l dan klorofil-a sebesar 0,2225 mg/ m3. Sebaran fosfat dan klorofil-a memiliki pola yang terkonsentrasi disekitar daratan dan kedalaman yang dangkal. Sebaran ortofosfat dan klorofil-a memiliki hubungan yang positif, karena ortofosfat merupakan salah satu nutrien yang dibutuhkan fitoplankton untuk menunjang proses fotosintesa. Kata Kunci: Ortofosfat, Klorofil-a, Selat Karimata

oai:ojs.ejournal.undip.ac.id:article/34095 2022-05-20T01:15:04Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/34095 2022-05-20T01:15:04Z Buletin Oseanografi Marina Vol 11, No 1 (2022): Buletin Oseanografi Marina; 77-85 Dikara, Raihan; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran Taofiqurohman, Ankiq; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran iskandar, Iskandar; Departemen Perikanan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran 2022-01-30 16:19:38 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/34095 Keselamatan; Risiko wisata pantai; Wisata; Pantai Pangandaran id Pantai Pangandaran merupakan salah satu objek wisata pesisir yang terletak di Kabupaten Pangandaran, Provinsi Jawa Barat dan merupakan salah satu obyek wisata unggulan di Provinsi Jawa Barat. Tetapi wisata di Pantai Pangandaran memiliki potensi bahaya fisik dan dalam beberapa kasus menimbulkan korban jiwa. Riset ini bertujuan untuk mengidentifikasi potensi bahaya fisik pantai bagi keselamatan pengunjung, menilai tingkatan risiko dari potensi bahaya fisik pantai bagi keselamatan pengunjung, dan menentukan penyebab tingginya risiko wisata di Kawasan Wisata Pantai Pangandaran. Metode yang digunakan riset ini adalah metode assessment. Data yang digunakan pada assessment tingkat risiko pantai yaitu: jumlah pengunjung, jumlah lifeguard, panjang pantai, jumlah rambu, penggunaan lifejacket, kecelakaan wisatawan, tipe pantai, dan tinggi gelombang. Hasil riset menunjukkan Kawasan Wisata Pantai Pangandaran termasuk kedalam tipe pantai longshore bar and trough. Kawasan Wisata Pantai Pangandaran termasuk kedalam kategori multiple fatalities dengan nilai R (tingkat risiko) lebih dari 200 di semua pantai pada periode low season ataupun high season. Khusus Pantai Barat pada periode high season kategori menurun menjadi fatal. Terdapat perbedaan nilai R yang signifikan pada kedua periode. Perbedaan nilai R menunjukan Kawasan Wisata Pantai Pangandaran relatif lebih aman pada periode high season. Penyebab utama dari tingginya tingkat risiko wisata di Kawasan Wisata Pantai Pangandaran adalah jumlah personil lifeguard dan rambu-rambu peringatan yang tidak mencukupi. Pangandaran Beach is one of the coastal tourism objects located in Pangandaran Regency, West Java Province and it is one of the leading tourism object in West Java Province. Tourism in Pangandaran has beach-physical potential hazard and some case of it creating casualties. This research aims to identify the potential physical hazards of the beach for the safety of visitors, assess the risk level of beach-physical potential hazard for the safety of visitors, and determine the cause of the high number of tourism risk in the Pangandaran Beach Tourism Area. The method used in this research is the assessment method. The data used in the assessment of the level of beach risk are:  number of visitors, number of lifeguards, beach length, number of signages, lifejacket usage, tourist accident, beach type, and wave height. Research results show that Pangandaran Beach Tourism Area belonged to longshore bar and trough beach type. Pangandaran Beach Tourism Area is belonged to multiple fatalities category with an R value (risk level) more than 200 on all beaches either on low season or high season. At high season period on West Beach the category shift to fatal. There is a significant difference in R value between two periods. The difference in value of R shows that Pangandaran Beach Tourism Area is relatively safer during the high season period. The main cause of the high number of tourism risk in the Pangandaran Beach Tourism Area are the insufficient number of lifeguard and warning signs.

oai:ojs.ejournal.undip.ac.id:article/2966 2012-04-03T02:28:05Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/2966 2012-04-03T02:28:05Z Buletin Oseanografi Marina Vol 1, No 1 (2011): Buletin Oseanografi Marina Suryono, Suryono Yudiati, Ervia The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/2966 en Abstract BSLT (Brine Shrimp Lethality Test) was conducted on crude ectract of Spirulina sp. The extraction was done by added methanol solution. The Spirulina extract tested to newly hatched Artemia  sp. nauplii. The objective of this study was to analize the mortality of the nauplii dan to determine the LC50-24h level. The result showed that the bioactive compound of Spirulina sp had a high toxicity level (LC50-24h: 113.2 ppm). It can be concluded that this specific microalgae had a potential source of medicine.   Keywords: Spirulina sp, BSLT,crude extract.

oai:ojs.ejournal.undip.ac.id:article/69484 2026-02-11T04:49:13Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/69484 2026-02-11T04:49:13Z Buletin Oseanografi Marina Vol 14, No 2 (2025): Buletin Oseanografi Marina; 241-254 Surbakti, Livia Chasinta; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Malikussaleh Erlangga, Erlangga; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Malikussaleh Syahrial, Syahrial; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Malikussaleh Hadinata, Fitra Wira; Program Studi Manajemen Sumberdaya Perarian Fakultas Pertanian, Universitas Tanjungpura Nufus, Hayatun; Program Studi Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan, Universitas Teuku Umar Anggraini, Rika; Jurusan Ilmu Kelautan, Fakultas Ilmu Kelautan dan Perikanan, Universitas Maritim Raja Ali Haji Agustini, Nella Tri; Jurusan Ilmu Kelautan, Fakultas Pertanian, Universitas Bengkulu Leni, Yusyam; Program Studi Pemanfaatan Sumberdaya Perikanan, Fakultas Peternakan, Universitas Jambi Rolin, Febrina; Program Studi Pemanfaatan Sumberdaya Perikanan, Fakultas Peternakan, Universitas Jambi Utami, Risnita Tri; Program Studi Ilmu Kelautan, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Sriwijaya 2025-06-10 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/69484 Bagan Serdang; cluster; mangrove; nMDS; struktur komunitas id Analisis multivariat seperti cluster dan nMDS sering digunakan untuk membantu interpretasi data lingkungan, sedangkan struktur komunitas vegetasi tumbuhan sangat berguna dalam mendeskripsikan ekologi suatu ekosistem, sehingga kajian penilaian analisis cluster dan nMDS terhadap struktur komunitas mangrove Desa Bagan Serdang dilakukan pada bulan September 2021. Hal ini bertujuan untuk mengetahui struktur komunitas mangrovenya berdasarkan analisis cluster dan nMDS. Vegetasi mangrove dikumpulkan dengan menarik transek kuadran yang tegak lurus garis pantai, kemudian data vegetasi mangrove dievaluasi menggunakan cluster dan nMDS. Keanekaragaman mangrove Desa Bagan Serdang teridentifikasi sebanyak 5 spesies dengan 4 famili, dimana penyebaran mangrovnya tergolong sesekali ditemukan (rata-rata frekuensi relatifnya 20,00%). Zona paling depan didominasi oleh Avicennia lanata, zona tengah didominasi oleh Rhizophora apiculata dan zona belakang didominansi oleh Rhizophora mucronata. Kerapatan mangrovenya berkisar antara 22,22 – 1222,22 ind/ha dan INP berkisar antara 9,64 – 231,78% dengan kerapatan vegetasi zona depan maupun tengah membentuk satu kelompok yang mengindikasikan kondisi kerapatannya hampir sama. Selanjutnya untuk INP, vegetasi zona depan dan tengah membentuk satu kelompok dengan spesies yang berperan penting adalah A. lanata serta R. apiculata, sedangkan di zona belakang, spesies yang berperan pentingnya adalah R. mucronata, E. agallocha dan X. granatum. Selain itu, basal area vegetasi mangrove Desa Bagan Serdang berkisar antara 278,22 – 654,35 m2/ha dengan basal area vegetasi zona depan maupun belakang memiliki tingkat kedewasaan yang hampir sama, sehingga membentuk satu kelompok. Kajian ini mengungkapkan adanya komposisi spesies mangrove campuran dengan perkembangan kedewasaan mangrovenya berbeda-beda. Data yang diinfokan dalam kajian ini akan menjadi baseline pengelolaan mangrove di Desa Bagan Serdang dan upaya konservasi di Provinsi Sumatera Utara maupun Indonesia.  Multivariate analyses such as clusters and nMDS are frequently used to facilitate in the interpretation of environmental data. In contrast, the community structure of plant vegetation is immensely useful in describing the ecology of an ecosystem. In September 2021, studies on the mangrove community structure of Bagan Serdang Village were conducted using cluster analysis and nMDS. It proposes to use cluster analysis and nMDS to determine the structure of the mangrove community. Mangrove vegetation was collected by pulling quadrant transects perpendicular to the shoreline, and the data was analyzed using clusters and nMDS. The diversity of mangroves in Bagan Serdang Village was identified as 5 species with 4 families, with mangrove distribution classified as occasional (average relative frequency of 20,00%). Avicennia lanata dominates the front zone, Rhizophora apiculata dominates the middle zone, and R. mucronata dominates the back zone. The mangrove density ranges from 22,22 to 1222,22 ind/ha, and the INP ranges from 9,64 to 231,78%, with the vegetation density in the front and middle zones forming one group that shows nearly the same density conditions. Furthermore, for the INP, the front and middle zone vegetation formed a group with species that played an important role which were A. lanata and R. apiculata, while species that played an important role in the rear zone were R. mucronata, E. agallocha, and X. granatum. Furthermore, the basal area of the mangrove vegetation in Bagan Serdang Village ranges from 278,22 to 654,35 m2/ha, with the basal area of the vegetation zones front and back having nearly the same maturity level, forming a single group. This study reveals the presence of a mixed mangrove species composition with different mangrove maturity developments. The data presented in this study will be the baseline for mangrove management in Bagan Serdang Village and conservation efforts in North Sumatra Province and Indonesia. 

oai:ojs.ejournal.undip.ac.id:article/19035 2020-04-17T12:05:11Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/19035 2020-04-17T12:05:11Z Buletin Oseanografi Marina Vol 7, No 1 (2018): Buletin Oseanografi Marina; 22-28 Subardjo, Petrus; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Suryo, Agus Anugroho Dwi; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Pratikno, Ibnu; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Handoyo, Gentur; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Diani, Karlina Putri; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2018-05-24 17:39:40 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/19035 Material Padatan Tersuspensi; Arus Pasut; Muara Sungai; Pemangkat; Total Suspended Solid; Tidal Current; Estuary en Muara Sungai Sambas merupakan gerbang bagi kapal-kapal yang akan melakukan aktivitas bongkar muat hasil tangkapan ikan di PPN Pemangkat. Besarnya konsentrasi material padatan tersuspensi berkaitan dengan tingkat sedimentasi di muara Sungai Sambas yang dapat menyebabkan pendangkalan sehingga aliran sungai ke laut terhambat dan alur pelayaran terganggu. Tujuan penelitian ini adalah untuk mengetahui konsentrasi dan pola sebaran material padatan tersuspensi di muara Sungai Sambas Provinsi Kalimantan Barat. Metode yang digunakan dalam penelitian ini adalah metode studi kasus. Analisis material padatan tersuspensi menggunakan metode Gravimetri. Data utama yang digunakan dalam penelitian ini meliputi data material padatan tersuspensi, arus,  dan pasang surut serta data pendukung berupa peta batimetri, dan peta RBI. Hasil penelitian menunjukkan bahwa konsentrasi material padatan tersuspensi terbesar berada di muara sungai dan semakin mengecil kearah laut lepas dengan konsentrasi material padatan tersuspensi saat pasang berkisar antara 67-600 mg/l serta konsentrasi material padatan tersuspensi saat surut berkisar antara 11-321 mg/l. Jenis arus yang mendominasi di muara Sungai Sambas adalah arus pasang surut. Tipe pasang surut yaitu campuran condong ke harian ganda. Kurangnya informasi mengenai arah pergerakan dan besaran konsentrasi material padatan tersuspensi di muara Sungai Sambas menjadikan penelitian untuk mengetahui konsentrasi dan pola sebaran material padatan tersuspensi di perairan tersebut diperlukan. Sambas Estuaries is the entrance for every fisherman boats which will do loading and unloading activity for their fishing at PPN Pemangkat. The amount of total suspended matter concentration is related to the sedimentation at the Sambas estuaries which can cause sedimentation so the river flow hampered and the shipping line disrupted. The purpose of this research is to know the concentration and the distribution of total suspended solid at Sambas Estuaries, West Kalimantan. The method which is used in this research is case study method. Data processing is using gravimetric analysis. The main data used in this research are data of total suspended solid, current, tidal and supporting data such as bathymetri map, RBI map. Based on data processing, known that the highest value of total suspended solid was at estuary and decreased toward the sea with the conscentration at tides ranged between 67-600 mg/l whereas concentration at low tide ranged between 11-321 mg/l. The type tidal which is belong mixed dominant semidiurnal type. Lack of information on the direction of movement and the concentration of total suspended solid at Sambas Estuaries makes research to find out the concentration and distribution of total suspended solid is held at the waters. 

oai:ojs.ejournal.undip.ac.id:article/47843 2023-05-13T09:22:51Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/47843 2023-05-13T09:22:51Z Buletin Oseanografi Marina Vol 12, No 1 (2023): Buletin Oseanografi Marina; 27-35 Aryawati, Riris; Jurusan Ilmu Kelautan, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Sriwijaya Melki, Melki; Jurusan Ilmu Kelautan, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Sriwijaya Azhara, Inda; Jurusan Ilmu Kelautan, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Sriwijaya Ulqodry, Tengku Zia; Jurusan Ilmu Kelautan, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Sriwijaya Hendri, Muhammad 2023-02-04 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/47843 Fitoplankton; Kelimpahan; Keragaman; Sungai Musi id Sungai Musi merupakan sungai terpanjang di Pulau Sumatera yang banyak dimanfaatkan masyarakat sebagai jalur transportasi dan berbagai aktivitas lainnya. Sungai Musi merupakan habitat fitoplankton yang dapat menjadi indikator kualitas perairan. Penelitian ini bertujuan mengetahui kelimpahan, keragaman, keseragaman, dominansi, dan  menganalisis potensi HABs fitoplankton di Perairan Sungai Musi bagian hilir. Hasil pengamatan pada 10 stasiun, ditemukan 6 genus fitoplankton dari kelas Bacillariophyceae (Bacillaria, Coscinodiscus, Ghemponema, Navicula, Skeletonema, Strepthotecha), 6 genus dari kelas Chlorophyceae (Chlorella, Hydrodiction, Micrasterias, Pediastrum, Platydorina, Spirogyra), 1 genus dari kelas Cyanophyceae (Oscillatoria). Hasil analisis diperoleh kelimpahan sebesar 10-483 sel/L, indeks keanekaragaman (H’) 0,89-1,57, indeks keseragaman (E) 0,75-0,99, dan indeks dominansi (C) 0,25-0,46 dengan genus fitoplankton di kelimpahan tertinggi Spirogyra dan terendah Bacillaria. Hasil pengamatan menunjukkan parameter fisika-kimia termasuk kategori baik untuk pertumbuhan fitoplankton dan ditemukan beberapa jenis fitoplankton yang berpotensi HABs (Coscinodiscus, Skeletonema, Oscillatoria).    The Musi River, the longest river on the island of Sumatra, is widely used by the community as a transportation route and for various other activities. Therefore, the Musi River is a habitat for phytoplankton and can be a bioindicator of water quality. This study aims to determine the success of analysing the abundance, diversity, uniformity, dominance and potential of HABs phytoplankton downstream of the Musi River. Observations of 10 sampling stations found six genera from the class Bacillariophyceae (Bacillaria, Coscinodiscus, Ghemponema, Navicula, Skeletonema, Streptotheca), six genera from the class Chlorophyceae (Chlorella, Hydrodiction, Micrasterias, Pediastrum, Platydorina, Spirogyra), one genus class Cyanophyceae (Oscillatoria). The results of the analysis obtained an abundance of 18-483 cells/L, the diversity index (H') 0.89-1.57, uniformity index (E) 0.75-0.99, and dominance index (C) 0.25-0.46 with the phytoplankton genus in the highest abundance of Spirogyra and the lowest Bacillariophyceae. Furthermore, the results of the observations show that the physicochemical parameters are in a suitable category for phytoplankton growth and found several types of phytoplankton that have the potential for HABs (Coscinodiscus, Skeletonema, Oscillatoria).

oai:ojs.ejournal.undip.ac.id:article/6925 2014-05-20T05:30:18Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6925 2014-05-20T05:30:18Z Buletin Oseanografi Marina Vol 2, No 1 (2013): Buletin Oseanografi Marina; 41-47 Suryono, Chrisna Adhi; Program Studi Ilmu Kelautan - FPIKUniversitas Diponegoro 2013-01-20 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6925 en Abstrak Kerang hijau dalam mendapatkan makanannya dengan cara menyaring plankton dari perairan.  Cara mendapatkan makanan yang demikian memungkinkan logam berat yang terlarut didalamnya ikut masuk kedala tubuh kerang hijau.  Tujuan dati penelitian ini adalah untuk mengetahui pengaruh logam berat Pb dan Cu terhadap kecepatan filtrasi kerang hijau.  Penelitian berskala laboratories ini menggunakan rancangan acak lengkap dengan 4 perlakuan Pb dan 4 perlakuan Cu masing masing diulang 3 ulangan.  Untuk mengetahui adanya perbedaan kecepatan filtrasi diuji dengan Anova. Hasil penelitian menunjukan semakin besar konsentrasi Pb atau Cu menunjukan semakin menurunnya filtrasi kerang hijau terhadap Skeletonema sp.   Kata Kunci : Perna viridis, filtrasi, Pb, Cu, Skeletonema sp

oai:ojs.ejournal.undip.ac.id:article/72048 2026-02-11T04:57:56Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/72048 2026-02-11T04:57:56Z Buletin Oseanografi Marina Vol 15, No 1 (2026): Buletin Oseanografi Marina; 105-118 Tuapetel, Friesland; Departemen Pemanfaatan Sumberdaya Perikanan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Pattimura Soukotta, Imanuel VT; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Pattimura Supusepa, Junita; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Pattimura 2026-02-25 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/72048 CPUE; Eopt; MSY; MEY; JTB id Ikan tongkol (Auxis rochei) merupakan komoditas perikanan bernilai ekonomi tinggi, namun peningkatan tekanan penangkapan berpotensi menurunkan keberlanjutan stok. Penelitian ini bertujuan mengkaji kondisi stok melalui analisis Catch per Unit Effort (CPUE), Maximum Sustainable Yield (MSY), Maximum Economic Yield (MEY), upaya penangkapan optimum (Eopt), serta kelayakan ekonomi dengan menggunakan Model Fox dan Schaefer. Data penelitian dikumpulkan selama tahun 2023 dari Dinas Kelautan dan Perikanan Provinsi Maluku dan Pelabuhan Perikanan Nusantara Ambon. Analisis dilakukan melalui perhitungan CPUE berdasarkan data hasil tangkapan dan penerapan regresi linier. Hasil penelitian menunjukkan adanya hubungan negatif yang kuat antara CPUE dan effort, dengan nilai koefisien determinasi berkisar antara 0,87–0,97. Estimasi MSY berdasarkan Model Fox dan Schaefer masing-masing mencapai 70.087 ton dan 158.027 ton dengan Eopt sebesar 13 dan 45 trip. Tingkat pemanfaatan stok saat ini masih berada pada kategori underfished, ditunjukkan oleh nilai jumlah tangkapan yang diperbolehkan (JTB) yang tinggi dibandingkan tangkapan aktual. Analisis MEY pada Model Fox menunjukkan efisiensi usaha tertinggi terjadi pada bulan Juni. Fluktuasi hasil tangkapan dipengaruhi oleh variasi musim dan dinamika oseanografi. Oleh karena itu, strategi pengelolaan perikanan tongkol di Laut Banda perlu difokuskan pada pengendalian upaya dan pengaturan musim penangkapan.    Skipjack tuna (Auxis rochei) is an economically valuable pelagic fishery resource, yet increasing fishing intensity may pressure long-term stock sustainability. This study aimed to evaluate skipjack tuna stock status through analyses of Catch per Unit Effort (CPUE), Maximum Sustainable Yield (MSY), Maximum Economic Yield (MEY), and optimal fishing effort (Eopt) using the Fox and Schaefer surplus production models. Data were collected throughout 2023 from the Maluku Provincial Marine and Fisheries Office and the Ambon Nusantara Fishing Port. Stock assessment was conducted by estimating CPUE from landing data and applying linear regression to examine relationships between fishing effort and stock indicators. The results showed a strong negative relationship between CPUE and fishing effort, with coefficients of determination ranging from 0.87 to 0.97. MSY estimates from the Fox and Schaefer models were 70,087 tons and 158,027 tons, corresponding to optimal fishing efforts of 13 and 45 trips. The current exploitation level was classified as underfished, as actual catches remained below the Total Allowable Catch. Therefore, management of skipjack tuna fisheries in the Banda Sea should emphasize fishing effort regulation and seasonal controls to support ecological sustainability and long-term economic benefits for fisheries.

oai:ojs.ejournal.undip.ac.id:article/24886 2020-04-17T12:08:26Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/24886 2020-04-17T12:08:26Z Buletin Oseanografi Marina Vol 8, No 2 (2019): Buletin Oseanografi Marina; 103-108 Ario, Raden; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Djunaedi, Ali; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Pratikto, Ibnu; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Subardjo, Petrus; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Farida, Fauzia; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2019-10-04 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/24886 Kepiting bakau; mutilasi; molting; lama waktu molting id Kepiting bakau (Scylla serrata) memiliki nilai ekonomis tinggi. Kebutuhan kepiting bakau selalu meningkat sehingga perlu diupayakan budidaya kepiting bakau secara intensif. Salah satu perkembangan teknologi dalam budidaya perikanan untuk meningkatkan produksi kepiting bakau adalah produksi kepiting cangkang lunak. Kepiting cangkang lunak merupakan kepiting fase ganti kulit (molting) yang mempunyai keunggulan cangkangnya lunak sehingga dapat dikonsumsi secara utuh. Untuk mempercepat kepiting molting diperlukan berbagai rangsangan yang salah satunya adalah menggunakan metode mutilasi. Tujuan penelitian untuk mengetahui perbedaan lama waktu molting dan pertumbuhan berat kepiting bakau dengan menggunakan metode mutilasi pada kaki jalan dan capit. Metode penelitian yang digunakan yaitu metode eksperimental dengan rancangan acak lengkap (RAL) yang terdiri dari empat perlakuan, yaitu mutilasi kaki jalan dan capit, semua kaki jalan, capit, dan alami. Biota yang digunakan berjumlah 40 ekor dengan 10 kali ulangan tiap perlakuan. Data yang diperoleh berupa lama waktu molting serta pertambahan berat mutlak kepiting bakau yang dianalisis menggunakan uji statistik parametrik. Hasil penelitian menunjukkan metode mutilasi berpengaruh terhadap lama waktu molting dengan waktu molting tercepat pada perlakuan mutilasi kaki jalan dan capit rata-rata 13 hari. Metode mutilasi tidak berpengaruh terhadap pertumbuhan berat mutlak dengan nilai tertinggi pada kepiting perlakuan alami sebesar 53,30 gram. Mud crabs (Scylla serrata) are known to have a high economic value. The increasing demand of mud crabs for consumption rxcequires higher production. Therefore, mud crabs need to be cultivated intensively. One of the methods to improve the values of mud crabs’ aquaculture is by producing soft-shell crabs. Soft-shell crabs are produced during molting phase in which the crab shed it’s exoskeleton in order to grow. In the fisheries industry, the soft-shell crabs are considered to be more valuable as it can be consumed as a whole. Accelerating the production of molting crabs, requires stimulus. One of the methods is mutilation. The aim of this study is to estimate the periods required for molting under different treatments, as well as calculating the increase of total weight of molting crabs.. The method used was an experimental method which contained four treatments. The treatments are mutilation of walking legs and claws, all of walking legs, claws, and no mutilation. The number of crabs used was 40 with 10 replications per treatment. The data obtained in the period of molting and the increase of total weight of the mud crabs were analyzed using ANOVA. The result shows that mutilation affects the period of crab’s molting in which the fastest molting (13 days on average) occurred after mutilation of walking legs and claws. This mutilation method does not influence the increase of total weight and the highest value is showed in non-treated group with the increase of 53,30 grams in weight. 

oai:ojs.ejournal.undip.ac.id:article/26095 2021-02-01T08:06:26Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/26095 2021-02-01T08:06:26Z Buletin Oseanografi Marina Vol 10, No 1 (2021): Buletin Oseanografi Marina; 33-41 Nadaa, Meutia Shibaa; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Taufiq-Spj, Nur; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Redjeki, Sri; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2021-02-01 10:08:06 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/26095 Kelimpahan; Struktur Komunitas; Makrozoobentos; Mangrove; Pulau Pari id Makrozoobentos merupakan indikator biologi perairan, disamping sebagai organisme sesil mereka juga mempunyai daur hidup yang relatif lama. Klass Gastropoda dan Bivalvia secara umum mempunyai kelimpahan dan keanekaragaman yang tinggi, dan senantiasa merespon kondisi kualitas air di tempat hidupnya. Penelitian ini bertujuan menganalisis struktur komunitas makrozoobenthos dan hubungannya dengan ekosistem mangrove di Pulau Pari. Purposive random sampling digunakan pada pengambilan sample dengan melihat kerapatan dan jenis vegetasi mangrove. Square plot 10 x 10 and 5 x 5 m digunakan untuk menghitung kelimpahan mangrove dan makrozoobentos (gastropoda dan bivalvia), sementara identifikasi moluska dilakukan di Lab LIPI Cibinong. Hasil menunjukkan kelimpahan mangrove dari keempat stasiun berkisar 1,200–2,700 pohon/Ha, sementara kelimpahan molusca antara 5.500-55.600 ind/Ha, dengan komposisi makrozoobentos terdapat 10 spesies gastropoda dan 1 spesies bivalvia. Keanekaragaman kedua klass termasuk pada kategori sedang (1,20-2,67), dengan keseragaman sedang (0,59-0,84) dan indeks dominansi antara 0,20-0,47. Analisis regresi hubungan kelimpahan mangrove dan makrozoobentos menunjukkan nilai 0,6498. Hal ini dapat disimpulkan bahwa pada kawasan mangrove P. Pari tidak ada jenis gastropoda ataupun bivalvia yang mendominasi, namun hubungan keduanya mengikuti kerapatan mangrove yang ada dengan nilai korelasi keduanya sebesar 0,8061.Jenis yang lebih beragam dan kelimpahan jenisnya lebih dipengaruhi oleh kerapatan mangrove sebagai tempat hidupnya. Macrozoobethos as a biological indicators aside as a sessile organisms, its also have relatively long life cycle. Gastropod and bivalvia class, are commonly have a high abundance and diversity, its always responds to the water quality conditions in their habitat. The aim of study is to analized macrozoobenthic community structure and their relationship to mangrove ecosystem at Pari Island. Purposive random sampling was used for sampling the organisms by comparing to the density and species of mangrove vegetation. Square plots of 10 x 10 and 5 x 5 m were used to calculate macrozoobenthos abundance (gastropods and bivalvia) meanwhile the identification of Gastropods and Bivalvia is in LIPI laboratory at Cibinong. The results shows that mangrove density is in between 1,200 to 2,700 inds/Ha, while composition of macrozoobenthos at Pari Island have 10 species of gastropods and one species of bivalvia. The diversity of the two classes is included into the medium category (1.20-2.67), with moderate uniformity (0.59-0.84) and the dominance index is between 0.20-0.47. The regression analysis of the relationship between mangrove and macrozoobenthic abundance is about 0.6498. It can be concluded that in the Pari Island’s mangrove area, there are no gastropods or bivalves that much dominate, but the relationship between of Gastropoda and Bivalvia is following the mangrove density with a correlation about 0.8061. More diverse types and abundance of species are affected by the density of mangroves as a place for its live.

oai:ojs.ejournal.undip.ac.id:article/60171 2024-07-04T18:54:21Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/60171 2024-07-04T18:54:21Z Buletin Oseanografi Marina Vol 13, No 2 (2024): Buletin Oseanografi Marina; 230-238 Hanjaya, Rayen; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Wulandari, Sri Yulina; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Yusuf, Muh; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Zainuri, Muhammad; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2024-06-05 22:58:07 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/60171 bahan organik; pasang surut; Sentinel-2; Sungai Loji; TSS id Kota Pekalongan merupakan salah satu kota yang identik dengan wilayah pesisirnya karena terletak di bagian utara Pulau Jawa. Penduduk dan aktivitas yang padat membuat saluran irigasi dan sungai menjadi tempat pembuangan limbah, seperti limbah domestik, industri, dan limbah berbahaya (B3). Salah satu tempat yang terdampak adalah Sungai Loji, Kota Pekalongan. Penelitian ini bertujuan untuk mengetahui sebaran konsentrasi bahan organik dan padatan tersuspensi total (TSS) serta mengkaji keterkaitan bahan organik dengan TSS pada saat pasang menuju surut. Pengambilan sampel dilapangan dilaksanakan pada 19 Juni 2022 di 11 satsiun. Sampel TSS  dianalisis menggunakan metode gravimetri dan bahan organik melalui metode titrasi. Pola sebaran TSS dan bahan organik divisualisasikan menggunakan software ArGIS. Hasil penelitian menunjukkan bahwa konsentrasi bahan organik bervariasi, mulai dari 5,40 – 9,60 mg/L dan konsentrasi TSS berkisar antara 57,73 – 70,26 mg/L. Sebaran konsentrasi bahan organik dan TSS tersebut dipengaruhi oleh aktivitas antropogenik, pasang surut, arus, dan musim muson timur. Analisis koefisien korelasi (r) terkait bahan organik dengan TSS pada saat menuju surut menunjukkan nilai sebesar r = -0.223. TSS tidak secara signifikan berkontribusi terhadap keberadaan bahan organik.  Pekalongan city is known for its coastal area as it is located in the northern part of Java Island. The dense population and various activities have led to the disposal of waste, including domestic and hazardous waste, into irrigation channels and rivers. One of the affected areas is the Loji River in Pekalongan. This study aims to identify the distribution of organic matter and total suspended solids (TSS) concentrations and assess their relationship at low tide. Field sampling was carried out on 19 June 2022 at 11 stations. TSS samples were analysed using the gravimetric method and organic matter by titration method. TSS and organic matter values were visualised using ArGIS software. The results showed that the concentration of organic matter varied, ranging from 5.40 - 9.60 mg/L and the TSS concentration ranged from 57.73 - 70.26 mg/L. The distribution of organic matter and TSS concentrations was influenced by anthropogenic activities, tides, currents, and the east monsoon season. Analysis of the correlation coefficient (r) of organic matter to TSS at low tide showed a negative relationship with a value of 0.223. This illustrates that TSS does not significantly contribute to the presence of organic matter. TSS in this study is dominated by inorganic material carried by river flow from the inland areas. 

oai:ojs.ejournal.undip.ac.id:article/11219 2016-06-07T23:59:17Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/11219 2016-06-07T23:59:17Z Buletin Oseanografi Marina Vol 1, No 2 (2012): Buletin Oseanografi Marina; 13-30 Satriadi, Alfi; Fakultas Perikanan dan Ilmu Kelautan UNDIP 2012-01-03 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/11219 en Sedimen tersuspensi memberikan peranan penting dalam penentuan kualitas air pada suatu perairan. Sedimen yang terlarut dalam badan air akan menyebabkan berkurangnya proses fotosintesis akibat terhalangnya radiasi energi matahari. Sedimen tersuspensi juga berperan penting dalam bidang rekayasa pantai (coastal engineering) dan manajemen kualitas air sangat membutuhkan pengetahuan tentang proses sebaran  sedimen tersuspensi. Tujuan dilakukannya penelitian ini adalah untuk mengetahui dan memperkirakan distribusi sebaran sedimen tersuspensi di perairan Paciran Lamongan. Penelitian ini dilaksanakan pada tanggal 14-20 Oktober 2009 di daerah sekitar perairan Paciran Lamongan.  Analisis sedimen dilakukan di Laboratorium Jurusan Ilmu Kelautan Universitas Diponegoro, Tembalang Semarang. Pengerjaan komputasi,  simulasi dilakukan selama 15 hari dari tanggal 14-29 Oktober 2009 disesuaikan dengan waktu pengukuran lapangan yang telah dilakukan. Penelitian ini menggunakan metode penelitian deskriptif, menggunakan software SMS (Surface Water Modelling System). Materi yang digunakan dalam penelitian ini adalah data primer berupa arus, pasang surut, sedimen dasar dan sedimen tersuspensi. Sedangkan data sekunder berupa peta bathimetri. Berdasarkan dari hasil analisa simulasi kecepatan arus di lokasi penelitian pada kondisi pasang menuju surut, pada saat musim barat mencapai antara 0,011 m/s-0,87 m/s. Pada saat kondisi surut menuju pasang, pada saat musim timur kecepatan arus antara 0,013 m/s-0,87 m/s. Hasil analisa simulasi sebaran sedimen menunjukkan distribusi sebaran konsentrasi sedimen tersuspensi berkisar antara 7 mg/l-142 mg/l.   Kata Kunci : Sedimen tersuspensi, arus, perairan Paciran Lamongan

oai:ojs.ejournal.undip.ac.id:article/36368 2021-09-21T18:44:36Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/36368 2021-09-21T18:44:36Z Buletin Oseanografi Marina Vol 10, No 3 (2021): Buletin Oseanografi Marina; 307-318 Suryono, Suryono; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Ambariyanto, Ambariyanto; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Munasik, Munasik; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Sugianto, Denny Nugroho; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Ario, Raden; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Pratikto, Ibnu; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Taufiq-Spj, Nur; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Canavaro, Syahrial Varrel; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Anggita, Tiara; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2021-10-01 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/36368 Hydrodynamics; Coastline; Barrier; Wave value; propagation id Posisi Pulau Panjang berada di sisi barat garis pantai pesisir kota Jepara, menjadikannya sebagai penghalang (barrier) terhadap gelombang yang akan menghantam pesisir Jepara. Pulau Panjang dikelilingi oleh gugusan terumbu karang.  Keterpaparan (exposure) terumbu karang oleh hidrodinamika gelombang yang melewatinya  perlu dikaji. Oleh sebab itu, dibutuhkan penelitian mengenai hidrodinamika gelombang pada terumbu karang di perairan  Pulau Panjang. Hasil penelitian didapatkan bahwa nilai gelombang yaitu gelombang signifikan (Hs), periode gelombang signifikan (Ts) adalah bervariasi. Nilai gelombang (Hs dan Hs) tinggi, akan  mengakibatkan terumbu karang pada sisi  barat, timur laut dan tenggara  Pulau Panjang lebih menerima keterpaparan  (ekposure)  oleh hidrodinamika  gelombang yang melewatinya. Pada hidrodinamika  gelombang lebih rendah, maka terumbu karang  yang terlindung dari keterpaparan (ekposure) gelombang adalah yang berada pada  sisi timur, barat daya, dan barat laut. Hasil interpolasi (Krigging) didapatkan hasil nilai Hs tertinggi berkisar antara 0,503-1,00. Arah datang gelombang dominan dari timur pulau Panjang, kemudian setelah melewati terumbu karang ada di sisi timur ,timur laut, dan utara  Pulau Panjang maka energinya menjadi berkurang, sehingga terumbu karang yang  ada di sisi barat, barat daya, dan selatan dari Pulau Panjang posisinya lebih aman dari keterpaparan (ekposure) oleh hidrodinamika gelombang yang melewatinya. Gelombang yang datang akan mengalami perubahan karakteristik (panjang, periode, tinggi gelombang) setelah melewati terumbu karang, sehingga  gelombang yang menuju pantai akan semakin berkurang seiring dengan perubahan kedalaman. Tingkat keterpaparan (ekposure) terumbu karang yang ada pada sisi timur,timur laut dan utara  di Pulau Panjang  oleh gelombang cukup tinggi, hal ini diduga yang menjadi salah satu faktor penyebab kerusakan terumbu karang yang ada diperairan  Pulau Panjang.  The position of Pulau Panjang is on the west side of the coastal coastline of the city of Jepara, making it a barrier against waves that will hit the coast of Jepara. Panjang Island is surrounded by clusters of coral reefs. The exposure (exposure) of coral reefs by the hydrodynamics of the waves that pass through them needs to be studied. The modeling results are then generated into a shapefile map to be overlaid with a shapefile map of changes in coral reefs by interpolation method with Kriging block. The results showed that the wave value, namely the significant wave (Hs), the period of the significant wave (Ts) varied. High wave values (Hs and Hs) will result in coral reefs on the west, northeast, and southeast sides of Panjang Island receiving more exposure (exposure) by the hydrodynamics of the waves that pass through them. At lower wave hydrodynamics, the coral reefs that are protected from wave exposure are those on the east, southwest, and northwest sides. The results of interpolation (Kriging) obtained the highest Hs values ranging from 0.503 to 1.00. The direction of the dominant wave coming from the east of Panjang Island, then after passing through the coral reefs is on the east, northeast, and north of Panjang Island, the energy is reduced, so that the coral reefs on the west, southwest, and south sides of Panjang Island are safer from exposure (exposure) by the hydrodynamics of waves that pass through it. The incoming waves will experience changes in characteristics (length, period, wave height) after passing through the coral reef so that the waves towards the coast will decrease along with changes in depth. The level of exposure to coral reefs on the east, northeast, and north sides of Panjang Island by waves is quite high, this is thought to be one of the factors causing damage to coral reefs in the waters of Panjang Island. 

oai:ojs.ejournal.undip.ac.id:article/66422 2026-02-11T04:53:31Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/66422 2026-02-11T04:53:31Z Buletin Oseanografi Marina Vol 14, No 1 (2025): Buletin Oseanografi Marina; 135-144 Setyowati, Sulis; Biology Study Program, Biology Department, Faculty of Science and Mathematics, Universitas Diponegoro Kusumaningrum, Hermin Pancasakti; Biotechnology Study Program, Biology Department, Faculty of Science and Mathematics, Universitas Diponegoro Zainuri, Muhammad; Oceanography Department, Faculty of Fisheries and Marine Science, Universitas Diponegoro Suprihadi, Agung; Biotechnology Study Program, Biology Department, Faculty of Science and Mathematics, Universitas Diponegoro Doktorasaintifika, Heradita Kaniaazzahra; Senior High School 1 Semarang Herida, Azalia Puspa; Oceanography Department, Faculty of Fisheries and Marine Science, Universitas Diponegoro Wahyuningsih, Candra; Oceanography Department, Faculty of Fisheries and Marine Science, Universitas Diponegoro Jannah, Siti Nur; Biotechnology Study Program, Biology Department, Faculty of Science and Mathematics, Universitas Diponegoro Wijanarka, Wijanarka; Biotechnology Study Program, Biology Department, Faculty of Science and Mathematics, Universitas Diponegoro 2025-02-20 05:07:29 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/66422 Bioremediation; Cadmium; ICP-OES; Nannochloropsis sp.; tufA id Cadmium (Cd) heavy metal pollution not only affects aquatic ecosystems but also has toxic effects on human health. Bioremediation using microalgae Nannochloropsis sp. is considered more economical and sustainable for overcoming heavy metal pollution. This study aims to molecular characterization of Nannochloropsis sp. with tufA gene markers, determine the effect of different Cd concentrations on the growth and morphology of Nannochloropsis sp. and the ability of Nannochloropsis sp. to absorb Cd concentrations. The methods used include DNA isolation, quantitative and qualitative DNA analysis, amplification of tufA gene, sequencing result analysis, phylogenetic tree analysis, and bioremediation test. The results of molecular characterization showed that Nannochloropsis sp. has similarities with N. oceanica strain BR2 plastid (CP044614.1) with 60% bootstrap value. Nannochloropsis sp. grew at different Cd concentration (0, 2, 4, and 6 ppm) but optimal at 0 ppm Cd concentration. Morphology of Nannochloropsis sp. showed morphological differences in the cell structure. The cell was broken and the color turned increasingly clear. Different concentrations of Cd metal on Nannochloropsis sp. growth significantly affected the decline in Nannochloropsis sp. growth. Nannochloropsis sp. has the potential to absorb heavy metal Cd with an efficiency that increases as the concentration reaching 62.6% at 6 ppm. It can be concluded that molecular characterization using the tufA marker was effective in showing that Nannochloropsis sp. had closed relation with N. oceanica strain BR2 plastids. Cadmium (Cd) exposure significantly reduced growth and caused cell damage, while Nannochloropsis sp. effectively adsorbed Cd and lowering Cd levels by 3.76 ppm.

oai:ojs.ejournal.undip.ac.id:article/15746 2020-04-17T12:04:06Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/15746 2020-04-17T12:04:06Z Buletin Oseanografi Marina Vol 6, No 1 (2017): Buletin Oseanografi Marina; 74-81 Hartati, Retno; Departemen Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Pratikto, Ibnu; Departemen Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Pratiwi, Tria Nidya; Departemen Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2017-08-28 16:35:25 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/15746 Kerapatan; Biomassa; Stok karbon; Lamun; Karimunjawa id Isu blue carbon telah menjadi perhatian dunia, melalui konsep UNEP 2009 yang telah memasukan vegetasi padang lamun sebagai penyerap karbon di lautan. Penyerapan karbon yang disimpan melalui sedimen dan jaringan pada lamun dalam bentuk biomassa. Penelitian yang dilakukan di Pulau Menjangan Kecil dan Pulau Sintok, Karimunjawa bertujuan untuk melihat tingkat kerapatan, tutupan  dan penyerapan karbon yang tersimpan dalam biomassa jaringan lamun (akar, rhizoma dan daun). Kerapatan serta tutupan lamun diukur dengan melakukan sampling lapangan menggunakan metode transek kuadrat 1m x 1m, identifikasi jenis lamun melihat panduan dari buku seagrasswatch. Hubungan kerapatan, biomassa dilakukan untuk melihat nilai kandungan karbon pada lamun. Sampling kerapatan, tutupan lamun dan nilai biomassa dilakukan pada semua titik, sedangkan untuk analisa karbon pada metode pengabuan dilakukan pada titik 50 m yang kemudian dikonversikan dengan nilai biomassa pada titik lainnya. Hasil pada penelitian ini ditemukan 8 jenis lamun, yaitu Enhalus acoroides, Thallasia hemprichii, Cymodocea rotundata, Cymodocea serrulata, Halodule uninervis, Halophila ovalis, Halophila minor, dan Halophila decipiens. Cymodocea rotundata mendominasi dikedua lokasi dengan kerapatan mencapai 1030 ind/m2. Nilai biomassa dibawah substrat (554,54 gbk/m2) lebih besar dibandingkan nilai biomassa diatas substrat (342,72 gbk/m2) diikuti nilai kandungan karbon dibawah substrat (193,31 gC/m2) yang lebih besar dibandingkan nilai kandungan karbon diatas substrat (119,99 gC/m2). Total kandungan karbon pada lokasi Pulau Menjangan Kecil adalah 32,18 ton karbon/ha dan Pulau Sintok adalah 4,18 ton karbon/ha. Blue carbon issue has become worldwide attention, UNEP through the concept of 2009 which has been to include vegetation seagrass beds as an absorbent of carbon in the ocean. The absorption of carbon that is stored through sediment and tissue in seagrass beds in the form of biomass. Research conducted on the island of Menjangan Kecil and island Sintok, Karimunjawa is to look at the level density, covering and absorption of carbon which is in biomass tissue seagrass ( the root, rhizoma and leaves ). Cover of seagrass density was measured by sampling the field using transect method 1m x 1m squares, identification of types of seagrass guidance from seagrasswatch book. Relationships density, biomass is made to see the value of the carbon content in the seagrass. Sampling density, seagrass cover and biomass values performed on all points, while carbon analysis on ashing method performed at the point of 50 m which is then converted to the value of biomass at another point. The results of the present study found 8 species of seagrasses that Enhalus acoroides, Thallasia hemprichii, Cymodocea rotundata, Cymodocea serrulata, Halodule uninervis, Halophila ovalis, Halophila minor, and Halophila decipiens. Cymodocea rotundata dominate in both locations with densities reaching 1030 ind/m2. Value biomass below the substrate (554.54 gbk/m2) indicates a value greater than the value of the biomass above the substrate (342.72 gbk/m2) followed by the value of the carbon content below the substrate (193.31 gC/m2) which is greater than the value carbon content above the substrate (119.99 gC/m2). Total carbon content in locations Menjangan Kecil Island is 32.18 tons of carbon and Sintok island was 4.18 tons of carbon.

oai:ojs.ejournal.undip.ac.id:article/44684 2023-01-25T06:05:53Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/44684 2023-01-25T06:05:53Z Buletin Oseanografi Marina Vol 11, No 3 (2022): Buletin Oseanografi Marina; 315-329 Wirawan, Muhammad Khaisar; Departemen Teknik Kelautan, Institut Teknologi Kalimantan Huda, Abiyani Choirul; Departemen Teknik Kelautan, Institut Teknologi Kalimantan Ariefianto, Rizki Mendung; Departemen Teknik Kelautan, Institut Teknologi Sepuluh Nopember Laksono, Rendatiyarso; Departemen Teknik Kelautan, Institut Teknologi Sepuluh Nopember Praktikto, Widi Agoes; Departemen Teknik Kelautan, Institut Teknologi Sepuluh Nopember Assidiq, Fuad Mahfud; Departemen Teknik Kelautan, Fakultas Teknik, Universitas Hasanuddin Putriyanti, Rani Yuniar; Departemen Teknik Kelautan, Institut Teknologi Kalimantan 2022-10-01 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/44684 Dermaga C; Laju Sedimentasi; Pengembangan Layout Alternatif id Pembangunan Dermaga C sebagai fasilitas baru di PT Petrokimia Gresik bertujuan untuk meningkatkan produktivitas perusahaan. Produktivitas ini terwujud dalam bentuk aktivitas percepatan bongkar muat barang yang diangkut dari kapal ke daratan atau sebaliknya. Namun, aktivitas ini akan terkendala di masa depan jika sedimentasi tidak diatasi dengan baik. Untuk mengatasi fenomena sedimentasi di suatu dermaga, perlu dilakukan analisis laju sedimentasi secara dini dengan mempertimbangkan faktor-faktor seperti karakteristik pasang surut, pola arus, dan profil gelombang. Beberapa cara dapat dilakukan untuk meminimalisir laju sedimentasi, salah satunya dengan memodifikasi layout dermaga dengan tujuan untuk mengurangi frekuensi pengerukan. Penelitian ini bertujuan untuk menganalisis laju sedimentasi di sekitar Dermaga C dan menghitung perkiraan volumenya. Dua layout alternatif dari Dermaga C eksisting diusulkan untuk meminimalisir bed level thickness yang dapat terjadi di dermaga. Penelitian ini menerapkan pemodelan numerik berbasis software MIKE 21. Hasilnya, layout alternatif 1 dan 2 untuk periode yang sama mampu mengurangi volume sedimentasi terhadap layout eksisting masing-masing sebesar 9348.12 m3 dan 13215.48 m3 atau memiliki persentase penurunan sebesar 45.3% dan 64.1%. Di antara layout alternatif 1 (LA1) dan 2 (LA2), layout kedua adalah rekomendasi yang paling optimal. Oleh karena itu, dapat disimpulkan bahwa modifikasi layout terbukti dapat menurunkan laju sedimentasi di Dermaga C. Construction of Port C as a new facility at PT Petrokimia Gresik aims to increase the company's productivity. This productivity is manifested in accelerating the loading and unloading of materials transported from ships to land or vice versa. However, this activity will be hampered in the future if the sedimentation is not handled correctly. Hence, the sedimentation phenomenon in a port needs to be overcome. It is essential to investigate the sedimentation rate by considering tidal characteristics, current patterns, and wave profiles. Various ways can be conducted to decrease the sedimentation rate, one of which is by modifying the port layout to minimize the intensity of dredging. This research aims to analyze the sedimentation rate around Port C and calculate the estimated volume. Two alternative layouts are proposed to minimize the bed level thickness on the Port C. This research applies numerical modeling based on MIKE 21 software. As a result, alternative layouts 1 and 2 for the same period can reduce the sedimentation volume to the existing layout by 9348.12 m3 and 13215.48 m3, respectively, or have a decreasing percentage of 45.3% and 64.1. %. The last layout is the most significant among alternative layouts 1 (LA1) and 2 (LA2). It can be emphasized that the layout modification is proven to decrease the sedimentation rate at Port C.

oai:ojs.ejournal.undip.ac.id:article/6915 2014-05-20T03:24:23Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6915 2014-05-20T03:24:23Z Buletin Oseanografi Marina Vol 1, No 5 (2012): Buletin Oseanografi Marina; 41-46 Supriyantini, Endang; Jurusan Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2012-10-10 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6915 en Pertumbuhan yang optimal dan kelulushidupan kerang yang dibudidayakan dipengaruhi oleh pakan yang diberikan. Penelitian ini bertujuan untuk mengetahui kecepatan filtrasi Kerang Totok pada jenis dan konsentrasi pakan yang berbeda. Penelitian ini dilaksanakan di Laboratorium Terpadu Jurusan Ilmu Kelautan Universitas Diponegoro Semarang. Metode yang digunakan dalam penelitian ini adalah eksperimental laboratories dengan Rancangan Acak Lengkap dengan 3 perlakuan jenis pakan yaitu Tetraselmis chuii, Skeletonema costatum, dan pakan campuran (1:1) dengan tiap jenis pakan  diberikan perlakuan konsentrasi 180.000 sel/ml, 270.000 sel/ml, 360.000 sel/ml dan 450.000 sel/ml. Masing-masing perlakuan dilakukan 3 kali pengulangan. Hasil penelitian menunjukkan bahwa kecepatan filtrasi rata-rata tertinggi Kerang Totok diperoleh pada perlakuan jenis pakan campuran (1:1), untuk konsentrasi pakan 180.000 sel/ml adalah 1,987 ± 0,0250 l/jam, konsentrasi pakan 270.000 sel/ml adalah 2,144 ± 0,0945 l/jam, konsentrasi pakan 360.000 sel/ml adalah 1,937 ± 0,0365 l/jam dan konsentrasi pakan 450.000 sel/ml adalah 1,864 ± 0,0052 l/jam. Kecepatan filtrasi rata-rata Kerang Totok  menurun pada perlakuan jenis pakan S. costatum, untuk konsentrasi 180.000 sel/ml adalah 1,554 ± 0,0422 l/jam, konsentrasi 270.000 sel/ml adalah 1,669 ± 0,0642 l/jam, konsentrasi 360.000 sel/ml adalah 1,537 ± 0,0603 l/jam dan konsentrasi 450.000 sel/ml adalah 1,587 ± 0,0544 l/jam. Kecepatan filtrasi rata-rata Kerang Totok terendah terjadi pada perlakuan jenis pakan T. chuii, untuk konsentrasi pakan 180.000 sel/ml adalah 1,154 ± 0,0768 l/jam, konsentrasi pakan 270.000 sel/ml adalah 1,161 ± 0,0514 l/jam, konsentrasi pakan 360.000 sel/ml adalah 1,270 ± 0,1432 l/jam dan konsentrasi pakan 450.000 sel/ml adalah 1,267 ± 0,0429 l/jam. Berdasarkan uji ANOVA menunjukkan bahwa perlakuan yang paling banyak diserap adalah jenis pakan campuran pada konsentrasi 270.000 sel/ml.   Kata kunci :   P. erosa, Kecepatan Filtrasi, Tetraselmis chuii, Skeletonema costatum

oai:ojs.ejournal.undip.ac.id:article/70775 2026-02-11T04:57:56Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/70775 2026-02-11T04:57:56Z Buletin Oseanografi Marina Vol 15, No 1 (2026): Buletin Oseanografi Marina; 1-9 Wulandari, Siti Siwi; Master of Environmental Science, School of Postgraduate, Universitas Diponegoro Soeprobowati, Tri Retnaningsih; Biology Departement, Faculty of Science and Mathematics, School of Postgraduate, Universitas Diponegoro Cluster of Paleolimnology Kismartini, Kismartini; Department of Public Administration, Faculty of Social and Political Sciences, Universitas Diponegoro 2026-02-25 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/70775 Wastewater; Microalgae; Nutrient; Phycoremediation; Pollution en Household wastewater processing at the Communal Wastewater Treatment Plant (WWTP) operated by the Guyub Rukun Community in Tegalsari Hamlet, Salatiga City, Indonesia, is expected to reduce water pollution in the Cengek River. However, effluent testing revealed high concentrations of TP, COD, and BOD. This study aims to conduct laboratory-scale phycoremediation experiments using Chlorella vulgaris with media mixed using Communal WWTP effluent. Samples were taken from the outlet pipe to obtain household wastewater treatment effluent. Sampling was done using the grab sampling method at 2 PM during high sanitation activity. Based on laboratory tests, the highest Chlorella vulgaris density for 0% effluent concentration was 77.75 x 104 cells/mL (day 7), 66.13 x 104 cells/mL (day 6) in 20%, 126.13 x 104 cells/mL (day 7) in 40%, 69.38 x 104 cells/mL (day 6) in 60%, 188.88 x 104 cells/mL (day 6) in 80%, and 232 x 104 cells/mL (day 7) in 100%. The best growth rate at 0% effluent concentration was 3.87 cells/mL/day (day 6), 3.52 cells/mL/day (day 6) in 20%, 4.25 cells/mL/day (day 6) in 40%, 3.56 cells/mL/day (day 5) in 60%, 4.69 cells/mL/day (day 6) in 80%, and 4.99 cells/mL/day (day 7) in 100%. The results showed that Chlorella vulgaris's best density and growth rate was 100% effluent concentration. This indicates that the WWTP effluent's TP, TN, and Nitrate contents can be a good substitute for microalgae chemical fertilizers. This study also demonstrated that Chlorella vulgaris is in effective phycoremediation agent and can grow in high concentrations of WWTP effluent.

oai:ojs.ejournal.undip.ac.id:article/20839 2020-04-17T12:07:30Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/20839 2020-04-17T12:07:30Z Buletin Oseanografi Marina Vol 8, No 1 (2019): Buletin Oseanografi Marina; 44-48 Kimberly, Faith Dibri; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Supriyantini, Endang; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Sedjati, Sri; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2019-04-19 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/20839 Dunaliella salina; Salinitas; Pertumbuhan; Lutein Faith Dibri Kimberly, Diponegoro University, Department of Marine Science id Dunaliella salina adalah salah satu mikroalga yang mengandung pigmen lutein. Lutein memiliki manfaat sebagai antioksidan untuk melawan radikal bebas pada mata. Pertumbuhan mikroalga dipengaruhi oleh berbagai macam faktor lingkungan, salah satunya adalah salinitas. Penelitian ini bertujuan untuk menentukan salinitas terbaik guna mengoptimalkan pertumbuhan dan produksi pigmen lutein pada D. salina. Metode yang digunakan adalah eksperimen laboratoris. Mikroalga D. salina dikultivasi dengan lima perlakuan salinitas yang berbeda yaitu 20, 25, 30, 35, dan 40 ppt. Pertumbuhan sel D. salina diamati selama 9 x 24 jam kemudian dipanen untuk perhitungan biomassanya. Biomassa basah hasil kultivasi diekstraksi menggunakan pelarut aseton. Ekstrak aseton D. salina kemudian dianalisis kandungan pigmen luteinnya secara spektrofotometrik. Hasil penelitian menunjukkan bahwa perlakuan salinitas berpengaruh secara signifikan terhadap pertumbuhan sel dan kandungan pigmen lutein D. salina. Pertumbuhan sel D. salina optimum pada perlakuan salinitas 30 ppt,yaitu sebesar 125,86 x 104 sel/mL, sedangkan untuk kandungan pigmen lutein     D. salina diproduksi optimum pada salinitas 25 ppt, yaitu sebesar 0,0077 µg/g. Dunaliella salina is a microalga containing lutein pigment. Lutein has the role of being an antioxidant to fight free radicals in the eye. Microalgae growth is influenced by a variety of environmental factors,  such as salinity. The purpose of this research is to determine the best salinity to optimize the growth and production of lutein pigments in D. salina. The method used in this research was a laboratory experiment. Microalgae D.salina was cultivated with five different salinity treatments, which 20, 25, 30, 35, and 40 ppt. Growth of D. salina cells was observed for 9 x 24 hours and then harvested for the biomass determination. The wet biomass from the cultivation results was extracted using acetone solvent. D. salina acetone extract was then analyzed for its lutein pigment content spectrophotometrically. The results showed that salinity treatment had a significant effect on cell growth and pigment content of lutein D. salina. The optimum growth of D. salina cell is optimally achieved in 30 ppt salinity treatment at the amount of 125,86 x 104 cell/mL, while for the lutein pigment content of D. salina is optimally achieved in 25 ppt salinity at the amount of 0,0077 µg/g.

oai:ojs.ejournal.undip.ac.id:article/50149 2023-06-20T04:50:15Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/50149 2023-06-20T04:50:15Z Buletin Oseanografi Marina Vol 12, No 2 (2023): Buletin Oseanografi Marina; 270-277 Liwun, Maria Kurniawati Lena; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Ismanto, Aris; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Indrayanti, Elis; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Munandar, Bayu; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Siagian, Hendry; PT. Freeport Indonesia 2023-06-20 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/50149 Abrasi; Akresi; LITPACK; Tanjung Lesung id Pantai Tanjung Lesung merupakan proyek strategis nasional yang menjadi potensi wisata pantai untuk perkembangan perekonomian Provinsi Banten. Kerusakan daerah pesisir telah terjadi dari tahun ke tahun di wilayah ini. Kondisi ini perlu dilakukan mitigasi untuk mengurangi resiko rusaknya infrastruktur dan sangat mengganggu permukiman, pariwisata, dan aktivitas masyarakat yang lain. Penelitian ini bertujuan untuk memprediksi perubahan garis pantai di Pantai Tanjung Lesung yang terjadi dalam 25 (2002 – 2047) tahun yang akan datang. Hasil penelitian ini diharapkan dapat menjadi pertimbangan dalam perencanaan pengembangan wisata pantai dengan mencegah terjadinya abrasi dan akresi di titik-titik krusial. Pemodelan perubahan garis pantai pada penelitian ini, menggunakan modul LITLINE, salah satu modul utama dari LITPACK dari MIKE 21. Pengumpulan data dilakukan dengan survey lapangan dan pengambilan data dari instansi terkait. Analisis hasil model perubahan garis pantai di Pantai Tanjung Lesung, Kab. Pandeglang menunjukkan potensi terjadinya proses abrasi dan akresi untuk 25 tahun ke depan. Selama 25 tahun dari tahun 2022 – 2047 garis pantai Tanjung Lesung mengalami abrasi sebesar 48.69 m dan akresi sebesar 51,7 m. Nilai rata – rata perubahan garis pantai adalah 11,5 dan 11,75 pada kejadian abrasi dan akresi secara berurut. Akumulasi akresi dengan kala periode 5 tahun hingga 2047 di daerah teluk adalah sebesar 61,65 m, sedangkan akumulasi abrasi dengan kala periode 5 tahun hingga 2047 adalah sebesar 72,49 m.   Tanjung Lesung Beach is a national strategic project that becomes a potential for coastal tourism for the economic development of Banten Province. Damage to coastal areas has occurred from year to year in this region. This condition needs to be mitigated to reduce the risk of infrastructure damage and greatly disrupt settlements, tourism, and other community activities This study aims to predict shoreline changes at Tanjung Lesung Beach that will occur in the next 25 (2002–2047) years.. The results of this study are expected to be considered in planning the development of coastal tourism by preventing abrasion and accretion at crucial points. The modeling of shoreline changes in this study uses the LITLINE module, one of the main modules of LITPACK from MIKE 21. Data collection is carried out by field surveys and data collection from relevant agencies. Analysis of the results of the model of shoreline change at Tanjung Lesung Beach, Pandeglang district shows the potential for abrasion and accretion processes for the next 25 years. For 25 years, from 2022 to 2047, the Tanjung Lesung coastline experienced 48.69 m of abrasion and 51.7 m of accretion. The average value of shoreline change is 11.5 and 11.75 for accretion and sedimentation events, respectively. The accumulation of accretion with a period of 5 years to 2047 in the bay area is 61.65 m, while the accumulation of abrasion with a period of 5 years to 2047 is 72.49m.

oai:ojs.ejournal.undip.ac.id:article/6951 2014-05-22T08:21:40Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6951 2014-05-22T08:21:40Z Buletin Oseanografi Marina Vol 2, No 3 (2013): Buletin Oseanografi Marina; 55-62 Maslukah, Lilik; Program Studi Oseanografi, Jurusan Ilmu kelautan, Universitas Diponegoro 2013-07-22 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6951 en Penelitian ini bertujuan untuk menganalisis hubungan antara konsentrasi logam berat dengan bahan organic dan ukuran butir dalam sedimen. Sampel sedimen diambil di 7 stasiun estuary Banjir Kanal Barat, Semarang.  Untuk mengetahui adanya hubungan antara logam berat dengan bahan organic dan ukuran butir dalam sedimen dilakukan analisis korelasi. Hasil penelitian menunjukkan bahwa Pb, Cd, dan Cu dalam sedimen mempunyai korelasi positif dengan bahan organic dan ukuran butir. Kandungan Logam berat lebih banyak ditemukan pada sedimen yang mempunyai ukuran butir yang lebih halus dan lebih banyak bahan organiknya.   Kata Kunci : Logam Berat, bahan organik, ukuran butir

oai:ojs.ejournal.undip.ac.id:article/32127 2021-02-01T08:06:22Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/32127 2021-02-01T08:06:22Z Buletin Oseanografi Marina Vol 9, No 2 (2020): Buletin Oseanografi Marina; 83-92 Setyati, Wilis Ari; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Pramesti, Rini; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Suryono, Chrisna Adhi; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2020-10-15 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/32127 id Radikal bebas merupakan senyawa yang bersifat reaktif dan berbahaya karena dapat merusak sel tubuh. Hal ini dapat diatasi dengan pemberian senyawa antioksidan. Saat ini di pasaran telah beredar antioksidan sintetis, tetapi senyawa ini bersifat akumulatif dan toksik. Oleh karena itu perlu pencarian senyawa alami bersifat antioksidan alami dan salah satunya  salah satu sumbernya adalah rumput laut. Perairan Jepara memiliki sumber daya rumput laut yang tinggi dan salah satunya jenis Sargassum. Penelitian ini bertujuan melakukan kajian evaluasi total senyawa fenol dan kapasitas antioksidan berbagai ekstrak Sargassum. Hasil penelitian ini sebagai dasar dalam penelitian suplemen antioksidan untuk tindakan preventif. Penelitian dilaksanakan pada bulan Juni 2018 dengan tahapan pengambilan sampel, ekstraksi, penentuan total fenol dan aktivitas antioksidan. Metode pengambilan sampel menggunakan metode purposif dan penentuan kapasitas antioksidan dan total fenol menggunakan metode eksperimen laboratoris.  Hasil analisis menunjukkan perlakuan perbedaan jenis ekstrak memiliki nilai persen inhibisi (IC50) yang berbeda secara nyata (p < 0,05). Tiga ekstrak dengan persen inhibisi terbaik jika diurutkan dari terkecil ke terbesar adalah ekstrak dengan pelarut etil asetat pada S. polycystum, S. crassifolium dan S duplicatum. Semakin tinggi konsentrasi ekstrak maka nilai persen inhibisi semakin tinggi juga (p < 0,05) demikian juga pada nilai total senyawa fenol. Kesimpulan dari penelitian ini terdapat hubungan antara total fenol dan persen inhibisi adalah linier dengan persamaan regresi dan nilai besar hubungan berbeda signifikan (p < 0,05). Free radical are reactive and dangerous compound which have bad impact to human cell. Antioxidant is an effective compound to against free radical. Recently, synthesis antioxidant are easy to find in the market, however, this compound tends to toxic accumulation. The nature antioxidant can be a solution of negative effect from synthesis product. Seaweed is natural product which content an active compound as antioxidant. Sargassum is brown seaweed that abundant in Jepara seawater. This study are aiming to evaluate of phenol content and antioxidant capacity from several sargassum extract. The result of this study is a primarily research of antioxidant supplements for preventive measures. This study was conducted in June 2018 with the stages of sampling, extraction, determination of total phenol and antioxidant activity. Purposive method is used for sampling method and experimental laboratory is used for determination of antioxidant capacity and total phenol. The analysis result show that each sargassum extract has significant deferent of inhibition concentrations (IC50) (p < 0,05). Three extracts with the best percentage of inhibition sorted from the smallest to the largest were S. polycistum, S. crassifolium and S duplicatum which were extracted with ethyl acetate solvents. The percentage of inhibitions are increase with increasing of extract concentration and phenol compound. The conclusion of this study is that total phenol and percent inhibition are linear with regression equations and significant difference values (p <0.05).

oai:ojs.ejournal.undip.ac.id:article/58303 2024-07-04T18:54:21Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/58303 2024-07-04T18:54:21Z Buletin Oseanografi Marina Vol 13, No 2 (2024): Buletin Oseanografi Marina; 291-302 Nurfitriani, Anggia; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran MS, Yuniarti; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran Sunarto, Sunarto; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran Ihsan, Yudi Nurul; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran 2024-06-05 22:58:10 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/58303 Pengelolaan; Konservasi; Penyu; Co-Management; Pangandaran id Penelitian ini dilakukan untuk menganalisis pengelolaan kawasan konservasi penyu berbasis co – management. Penelitian bertujuan untuk mengevaluasi pengelolaan kawasan konservasi penyu berbasis co–management di pesisir Pangandaran agar pengelolaannya dapat ideal. Riset ini menggunakan metode riset campuran atau mixed methods, dengan jenis riset exploratory sequential. Pada pengambilan data dengan pendekatan kualitatif, riset ini menggunakan teknik pengambilan responden dengan teknik purposive sampling, sedangkan pada pengambilan data dengan pendekatan kuantitatif, riset ini menggunakan skala likert dan teknik dokumentasi. Metode analisis data yang digunakan dalam pendekatan kualitatif riset ini adalah analisis data kualitatif dengan model Miles dan Huberman, sedangkan metode analisis data yang digunakan dalam pendekatan kuantitatif riset ini adalah analisis data deskriptif komparatif. Penelitian menemukan ketidakidealan pada kondisi kunci pengelolaan co–management dan kondisi produktivitas penyu, kemudian penelitian juga menemukan bahwa jenis pengelolaan yang dilaksanakan merupakan pengelolaan consultative co – management.Hasil temuan pada penelitian ini memberikan informasi yang dapat dijadikan sebagai bahan dalam penentuan pengelolaan selanjutnya.  This research was conducted to analyze the management of turtle conservation areas based on co-management. The research aims to evaluate co-management-based management of turtle conservation areas on the Pangandaran coast so that management can be ideal. This research uses mixed research methods, with a sequential exploratory research type. In collecting data using a qualitative approach, this research uses a purposive sampling technique for collecting respondents, while in collecting data using a quantitative approach, this research uses a Likert scale and documentation techniques. The data analysis method used in the qualitative approach to this research is qualitative data analysis using the Miles and Huberman model, while the data analysis method used in the quantitative approach to this research is comparative descriptive data analysis. The research found non-idealities in key co-management conditions and turtle productivity conditions, then the research also found that the type of management implemented was consultative co-management. The findings in this research provide information that can be used as material in determining further management.

oai:ojs.ejournal.undip.ac.id:article/11168 2016-05-31T02:54:21Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/11168 2016-05-31T02:54:21Z Buletin Oseanografi Marina Vol 2, No 4 (2013): Buletin Oseanografi Marina; 18-24 Aziz, Muhammad Fatkhul; Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro Ismunarti, Dwi Haryo; Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro Rochaddi, Baskoro; Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/11168 en Tempat Pelelangan Ikan (TPI) Larangan di Kabupaten Tegal merupakan pusat bagi para nelayan untuk berlabuh dan melelang hasil tangkapannya. Untuk menunjang kelancaran aktifitas pembangunan dan kegiatan masyarakat, diperlukan informasi mengenai tipe dan karakteristik pasang surut di perairan TPI Larangan. Penelitian ini dilaksanakan pada tanggal 21 Mei – 4 Juni 2013 di TPI Larangan , Kabupaten Tegal. Data yang digunakan adalah data pengamatan elevasi pasang surut selama 15 hari.Pengolahan dan analisis data pengamatan lapangan menggunakan metode Admiralty dan untuk peramalan 5 tahun digunakan progam MIKE 21. Hasil penelitian menunjukan bahwa tipe pasang surut perairan TPI Larangan  yang dapat diketahui adalah campuran condong harian ganda dengan nilai Formzahl = 1.34, memiliki duduk tengah (MSL) 64.645 cm, muka air  rendah terendah (LLWL) sebesar 16.12 cm, muka air tinggi tertinggi (HHWL) sebesar 113.07 cm, rentang pasang surut berkisar 18.15 cm sampai dengan 110.65 cm. Perairan TPI Larangan memiliki karakteristik tidal asymmetri, kondisi waktu pasang menuju surut lebih lama daripada waktu surut menuju pasang. Waktu kedatangan pasang maupun surut juga mengalami keterlambatan untuk tiap harinya selama periode pengamatan. Kata kunci: Pasang surut, metode Admiralty, MIKE 21, Formzahl, TPI Larangan

oai:ojs.ejournal.undip.ac.id:article/37228 2021-09-19T19:04:11Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/37228 2021-09-19T19:04:11Z Buletin Oseanografi Marina Vol 10, No 3 (2021): Buletin Oseanografi Marina; 233-241 Paramita, Padma; Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Brawijaya Wiguna, Sesa; Direktorat Pemetaan dan Evaluasi Risiko Bencana, Badan Nasional Penanggulangan Bencana Shabrina, Fathia Zulfati; Direktorat Pemetaan dan Evaluasi Risiko Bencana, Badan Nasional Penanggulangan Bencana Sartimbul, Aida; Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Brawijaya Marine Resources Exploration and Management Research Group, Universitas Brawijaya 2021-09-20 02:02:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/37228 tsunami; peta bahaya; SIG; Kabupaten Serang id Indonesia merupakan negara yang memiliki potensi tinggi akan kejadian tsunami. Salah satu wilayah tersebut adalah Kabupaten Serang bagian barat. Saat ini evolusi teknologi penginderaan jauh dan Sistem Informasi Geografis (SIG) dapat dimanfaatkan untuk membantu upaya mitigasi. Tujuan penelitian ini adalah untuk menganalisis potensi tsunami dan menyediakan peta bahaya tsunami sebagai salah satu upaya mitigasi bencana berbasis Sistem Informasi Geografis (SIG) berdasarkan panduan dari Badan Nasional Penanggulangan Bencana (BNPB). Metode yang digunakan dalam penelitian ini adalah metode matematis yang dikembangkan oleh Berryman-2006. Metode ini merupakan metode yang sederhana namun cukup akurat dalam memperkirakan daerah yang berpotensi terdampak tsunami. Data Digital Elevation Model (DEM) dan shapefile rupa bumi yang bersumber dari Badan Informasi Geospasial (BIG) Indonesia merupakan data utama yang digunakan. Hasil analisis menunjukkan bahwa potensi bahaya tsunami di Kabupaten Serang bagian barat terdiri dari 3 kelas yaitu kelas rendah, sedang, dan tinggi yang didominasi oleh kelas bahaya tinggi dengan total luas area terdampak sebesar 377,64 ha. Peta bahaya tsunami ini selanjutnya dapat dijadikan sebagai salah satu basis informasi dalam perencanaan mitigasi bencana di Kabupaten Serang.  Indonesia is a country that has a high potential for tsunami events. One of these areas is the western part of Serang Regency. Currently, the evolution of remote sensing technology and Geographic Information Systems (GIS) can be utilized to assist mitigation efforts. The purpose of this study is to analyze the potential for tsunamis and provide a tsunami hazard map as one of the efforts to mitigate disasters based on Geographic Information Systems (GIS) based on guidelines from the National Disaster Management Agency (BNPB). The method used in this research is a mathematical method developed by Berryman-2006. This method is a simple but fairly accurate method for estimating areas potentially affected by a tsunami. Digital Elevation Model (DEM) data and the shapefile of the earth's appearance sourced from the Indonesian Geospatial Information Agency (BIG) are the main data used. The results of the analysis show that the potential tsunami hazard in the western part of Serang Regency consists of 3 classes, namely low, medium, and high classes which are dominated by high hazard classes with a total area of 377.64 ha affected. This tsunami hazard map can then be used as one of the information bases in disaster mitigation planning in Serang Regency.

oai:ojs.ejournal.undip.ac.id:article/64643 2026-02-11T04:53:31Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/64643 2026-02-11T04:53:31Z Buletin Oseanografi Marina Vol 14, No 1 (2025): Buletin Oseanografi Marina; 121-134 Priscilla, Viona Azhari; Program studi Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Bengkulu Mitigation and Exploration Laboratory, Lantai 2 Lab. Terpadu FMIPA, Universitas Bengkulu Farid, Muchammad; Program studi Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Bengkulu Pusat Studi Mitigasi Bencana, Universitas Bengkulu Mitigation and Exploration Laboratory, Lantai 2 Lab. Terpadu FMIPA, Universitas Bengkulu Lidiawati, Liza; Program Studi Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Bengkulu Al Ansory, Andre Rahmat; Mitigation and Exploration Laboratory, Lantai 2 Lab. Terpadu FMIPA, Universitas Bengkulu 2025-02-20 05:07:29 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/64643 Perubahan Garis Pantai; Kecepatan Gelombang Geser; Seismik Pasif; Desa Urai id Kabupaten Bengkulu Utara mempunyai garis pantai yang panjangnya sekitar 262,63 km dan berada di wilayah rawan Gempabumi yang ditunjukkan dengan besarnya nilai Peak Ground Acceleration (PGA > 300). Salah satu sumber daya pesisir di Kabupaten Bengkulu Utara yang memberikan manfaat bagi masyarakat setempat adalah kawasan di sepanjang pantai. Namun, manfaat bagi masyarakat sekitar terancam akibat fenomena abrasi di wilayah pesisir. Kabupaten Bengkulu Utara merupakan kabupaten ke-70 di indonesia yang rentan terhadap bencana abrasi pantai, sehingga masuk dalam kategori kabupaten yang sangat rentan terhadap bencana jenis tersebut. Desa Urai merupakan salah satu wilayah yang rentan terhadap abrasi pantai di Kabupaten Bengkulu Utara. Berdasarkan keadaan yang terjadi di Desa Urai, maka perlu dilakukan penelitian untuk mengetahui kecepatan perubahan garis pantai menggunakan data Citra Satelit dan data Seismik Pasif dalam bentuk kecepatan gelombang geser ( ) dengan menggunakan metode HVSR (Horizontal to Vertical Spectral Ratio). Hasil penelitian menunjukkan daerah yang mengalami abrasi memiliki kecepatan perubahan garis pantai pada rentang antara 1,41-5,04 m/tahun, dengan kecepatan gelombang geser ( ) antara 176,30-237,12 m/s. Daerah yang mengalami abrasi memiliki nilai kecepatan perubahan garis pantai yang tinggi yang didukung dengan nilai  rendah yang mengindikasikan klasifikasi tanah berada pada jenis tanah lunak sampai sedang. 

oai:ojs.ejournal.undip.ac.id:article/15736 2020-04-17T12:03:23Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/15736 2020-04-17T12:03:23Z Buletin Oseanografi Marina Vol 6, No 1 (2017): Buletin Oseanografi Marina; 9-16 Prasetyawan, Indra Budi; Program Studi Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Maslukah, Lilik; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Rifai, Azis; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2017-08-28 16:35:22 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/15736 CO2; Karbon Anorganik; Fisika-Kimia Perairan id Sistem CO2 dalam perairan adalah dalam bentuk gas (CO2), asam bikarbonat, ion bikarbonat dan ion karbonat. Jumlah total dari semua bentuk sistem CO2 disebut konsentrasi total CO2 [∑CO2] dan sering disebut karbon anorganik terlarut (Dissolved Inorganic Carbon/DIC). Keberadaan karbon anorganik ini berperan penting dalam reaksi kimiawi di dalam perairan. Pertukaran (fluks) karbon anorganik juga berperan penting dalam mengontrol pH di laut dan juga menentukan perairan sebagai source karbon (sumber) atau sink karbon (penyimpan). Perbedaan tekanan parsial karbon menentukan pertukaran antara atmosfir dan lautan. Untuk mengetahui variabilitas pertukaran CO2 antara laut dan atmosfer diperlukan pengukuran sistem CO2. Tujuan utama dari penelitian ini adalah mengkaji distribusi spasial karbon anorganik terlarut di Perairan Jepara dan hubungannya dengan faktor-faktor fisika-kimia perairan yang meliputi suhu, pH, alkalinitas, salinitas dan DO. Metode penelitian yang digunakan dalam penelitian ini adalah kuantitatif. Pengukuran karbon anorganik terlarut, alkalinitas dan oksigen terlarut menggunakan metode titrasi. Hasil analisa data ditampilkan dalam bentuk peta sebaran dengan menggunakan program ArGIS. Berdasarkan hasil penelitian di Perairan Jepara diperoleh kesimpulan sebagai berikut bahwa semua stasiun kecuali stasiun 11 memiliki nilai temperatur berkisar antara 29 – 300C, hal ini dikarenakan pengukuran berada di perairan terbuka dan dekat dengan daratan sehingga energi matahari lebih efektif meningkatkan temperatur air laut. Nilai salinitas terendah berada di Stasiun 1 yang letaknya berada di mulut muara Sungai Serang dengan nilai 28.70/00, hal ini di karenakan adanya masukan air tawar yang memiliki salinitas yang rendah.Kandungan DO yang rendah berkisar 2.4 ppm – 2.56 ppm dikarenakan masuknya bahan-bahan organik ke perairan Jepara sehingga membutuhkan oksigen yang banyak untuk menguraikannya.Dari hasil analisis di laboratorium terhadap 12 sampel air laut Perairan Jepara, menunjukkan bahwa kandungan CO2 berkisar antara 4.6 ppm – 24.1 ppm. Stasiun 1 dan Stasiun 2 yang terletak di dekat muara Sungai Serang memiliki kandungan CO2 yang lebih besar dibandingkan Stasiun-Stasiun lainnya.  CO2 in the water system is in gaseous form (CO2), the bicarbonate acid, bicarbonate ions and carbonate ions. The total amount of all forms of the CO2 system called total concentration of CO2 [ΣCO2] and is often called the dissolved inorganic carbon (Dissolved Inorganic Carbon / DIC). The existence of inorganic carbon plays an important role in the chemical reactions in the water. Exchange (flux) inorganic carbon is also important in controlling pH in the ocean and also determines the waters as a source of carbon (sources) or a carbon sink (storage). Differences partial pressure of carbon determines the exchange between the atmosphere and oceans. To determine the variability of the exchange of CO2 between the ocean and atmospheric CO2 system measurement required. The main objective of this study is to examine the spatial distribution of dissolved inorganic carbon in the waters of Jepara and its association with factors physico-chemical marine waters of pH, alkalinity, salinity and chlorophyll. The method used in this research is quantitative. Measurement of dissolved inorganic carbon, alkalinity and dissolved oxygen using titration methods. Results of analysis of the data shown in the form of distribution maps using ARGIS program. Based on the result of research of Jepara Waters, inferred that all Stations except Station 11 has temperature value ranged 29 – 300C, it is caused that the measurements conducted in open ocean and close to land therefore sun energy more effective to increase sea water temperature. The lowest salinity at the Station 1 located at the mouth of Serang River is 28.70/00, it is caused by the existence of river discharge which has low salinity. The low DO ranged 2.4 ppm – 2.56 ppm caused by the input of organic materials into Jepara Waters. According to analysis result at the laboratorium to 12 water samples in the Jepara Waters, showing the value of CO2 ranged from 4.6 ppm – 24.1 ppm. Station 1 and Station 2 that are located at the river mouth contain higher CO2 than the other stations. 

oai:ojs.ejournal.undip.ac.id:article/46329 2022-09-07T17:08:50Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/46329 2022-09-07T17:08:50Z Buletin Oseanografi Marina Vol 11, No 2 (2022): Buletin Oseanografi Marina; 215-220 Wulandari, Sri Yulina; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Radjasa, Ocky Karna; Badan Riset dan Inovasi Nasional Republik Indonesia Yulianto, Bambang; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Munandar, Bayu; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2022-06-01 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/46329 mikroplastik; musim; pasang surut; Delta Wulan id Sungai merupakan jalur penting masuknya mikroplastik ke perairan laut. Mikroplastik baik primer atau sekunder merupakan polutan partikel plastik yang berukuran kurang dari 5 mm (ukuran partikel mirip dengan partikel suspensi atau plankton). Termasuk sampah plastik, mikroplastik berpotensi menyebabkan terganggunya rantai makanan pada biota laut. Penelitian ini bertujuan untuk mengetahui konsentrasi mikroplastik di kolom air pada musim hujan dan kemarau saat kondisi pasang dan surut di perairan Delta Wulan, Kecamatan Wedung Kabupaten Demak. Metode yang digunakan adalah deskriptif kuantitatif. Total sebanyak 32 sampel air laut diambil dengan menggunakan plankton net dari 8 stasiun pengamatan yang ditentukan secara purposive. Pengambilan sampel dilakukan dengan mempertimbangkan kondisi musim dan pasang surut. Analisa kandungan mikroplastik dalam sampel air laut dilakukan dengan menggunakan metode yang direkomendasikan oleh NOAA. Prosedur analisa meliputi penyaringan sampel air, penambahan reagen (Fe (II) 0,05M, H2O2 30%, NaCl), pemanasan, pemisahan berdasarkan densitas dan analisa gravimeri, Hasil penelitian menunjukkan bahwa nilai konsentrasi mikroplastik lebih tinggi pada musim kemarau dibanding musim hujan, dengan nilai rerata berturut-turut sebesar 2,608 mg/L dan 2,247 mg/L. Dari analisa regresi ANOVA menunjukkan ada perbedaan konsentrasi berdasarkan musim (p-value sebesar 0,007), namun tidak ada perbedaan berdasarkan kondisi pasang dan surut (p-value sebesar 0,840).   Rivers are an important pathway for the entry of microplastics into marine waters. Microplastics, both primary and secondary, are pollutants of plastic particles that are less than 5 mm in size (particle size is similar to sediment suspense or plankton). Including plastic waste, microplastics have the potential to disrupt the food chain in marine biota. This study aims to determine the concentration of microplastics in the water column during the rainy and dry seasons during high and low tide conditions in the waters of the Wulan Delta, Wedung District, Demak Regency. The method used is descriptive quantitative. A total of 32 seawater samples were taken using a plankton net from 8 observation stations which were determined purposively. Sampling was carried out by considering seasonal and tidal conditions. Analysis of microplastic content in seawater samples was carried out using the procedure recommended by NOAA. The analytical procedure includes filtering of water samples, addition of reagent (Fe (II) 0.05M, 30% H2O2, NaCl), heating, density separation and gravimetric analysis. The results showed that the concentration of microplastics was higher in the dry season than in the rainy season, with an average value of 2,608 mg/L and 2,247 mg/L, respectively. From the ANOVA regression analysis showed that there was a difference in concentration based on seasons (p-value of 0.007), but there was no difference based on tidal and tidal conditions (p-value of 0.840).

oai:ojs.ejournal.undip.ac.id:article/6906 2014-05-20T02:11:08Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6906 2014-05-20T02:11:08Z Buletin Oseanografi Marina Vol 1, No 3 (2012): Buletin Oseanografi Marina; 16-24 Munasik, Munasik; Jurusan Ilmu Kelautan, FPIK Universitas Diponegoro Ambariyanto, Ambariyanto; Jurusan Ilmu Kelautan, FPIK Universitas Diponegoro A Sabdono, A Sabdono; Jurusan Ilmu Kelautan, FPIK Universitas Diponegoro Diah Permata W, Diah Permata W; Jurusan Ilmu Kelautan, FPIK Universitas Diponegoro OK. Radjasa, OK. Radjasa; Jurusan Ilmu Kelautan, FPIK Universitas Diponegoro R Pribadi, R Pribadi; Jurusan Ilmu Kelautan, FPIK Universitas Diponegoro 2012-04-22 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6906 en Karang keras (Scleractinia) ditemukan di Pulau Panjang mulai dari dataran terumbu karang yang dangkal hingga kedalaman 7m. Terumbu karang berkembang baik di bagian pulau yang melawan angin ‘leeward dibanding  di bagian yang searah angin ‘windward’ yang ditandai dengan banyaknya mikroatol Porites. Sebaran spasial genera karang keras di P. Panjang menunjukkan perbedaan baik dari segi  sisi pulau maupun kedalaman. Karang keras Porites, Pocillopora dan Stylopora banyak ditemukan di dataran terumbu sisi bawah angin (leeward) sedangkan di kedalaman 7m pada sisi pulau yang sama umumnya tersusun dari  Lobophyllia dan Pectinia. Dataran terumbu sisi atas angin (windward) tersusun atas genera Cypastrea, Galaxea dan Platygyra sedangkan di kedalaman 7m terdapat genera karang Pavona, Hydnophora, Merulina, Galaxea dan Favites. Perbedaan sebaran spasial genera karang keras (Scleractinia) di Pulau Panjang, Jawa Tengah tampaknya berhubungan dengan tekanan fisik (seperti gelombang). Kata Kunci: Sebaran, Karang keras (Scleractinia), Pulau Panjang, Jawa Tengah

oai:ojs.ejournal.undip.ac.id:article/55200 2025-10-18T08:20:06Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/55200 2025-10-18T08:20:06Z Buletin Oseanografi Marina Vol 14, No 3 (2025): Buletin Oseanografi Marina; 403-412 Wardani, Adella Eka; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Wulandari, Sri Yulina; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Rochaddi, Baskoro; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Zainuri, Muhammad; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Handoyo, Gentur; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2025-10-18 15:20:02 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/55200 Klorofil-a; MPT; Sentinel-2; Muara Sungai Loji id Muara Sungai Loji, Pekalongan merupakan salah satu lokasi hasil berkumpulnya limbah bahan organik akibat pembuangan kegiatan manusia dan berdampak terhadap parameter perairan yaitu klorofil dan MPT. Tujuan penelitian ini adalah mengetahui kandungan serta sebaran klorofil-a dan MPT dari hasil pengukuran data lapangan pada musim timur, serta menganalisis hubungan antara klorofil-a dan MPT. Penelitian dilaksanakan pada tanggal 19 Juni 2022 dengan pengambilan sampel klorofil-a dan MPT secara pada 11 titik lokasi penelitian. Penelitian dilaksanakan dengan pendekatan kuantitatif, dimana hasil pengukuran in-situ di-overlay pada citra dari satelit Sentinel-2 yang di download bersamaan dengan perioda sampling, dengan interpolasi menggunakan spline with barrier. Hasil penelitian menunjukkan, konsentrasi klorofil-a berkisar antara 0,00494 - 0,003788 mg/L sedangkan, nilai konsentrasi MPT diantara 57,73 – 70,27 mg/L. Sebaran klorofil-a dan MPT menunjukkan pola bergerak dari arah tenggara menuju ke barat laut, sebagai akibat dari masukan limbah bahan organik dari wilayah muara serta arus dan angin pada periode musim timur. Klorofil-a dan MPT di muara Sungai Loji, Pekalongan memiliki hubungan yang positif sedang dengan nilai koefisien korelasi (r) kedua variabel sebesar 0,29767 dan berdasarkan koefisien determinasinya klorofil-a mempengaruhi konsentrasi material padatan tersuspensi sebesar 8,86%. 

oai:ojs.ejournal.undip.ac.id:article/20549 2020-04-17T12:06:58Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/20549 2020-04-17T12:06:58Z Buletin Oseanografi Marina Vol 7, No 2 (2018): Buletin Oseanografi Marina; 103-112 Aditya, Rizky; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Wirasatriya, Anindya; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Kunarso, Kunarso; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Maslukah, Lilik; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Subardjo, Petrus; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Suryosaputro, Agus Anugroho Dwi; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Handoyo, Gentur; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2018-10-08 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/20549 Fishing Ground; Ikan Teri; Citra MODIS en Fishing ground  atau  zona  penangkapan ikan  adalah  suatu  kawasan perairan  yang  menjadi sasaran dalam usaha penangkapan ikan. Ikan teri merupakan hasil tangkapan ikan yang populer di Karimunjawa. Penelitian ini bertujuan memprediksi zona tangkapan ikan di Perairan Karimunjawa berdasarkan sebaran klorofil-a dan suhu permukaan laut dengan memanfaatkan data citra satelit Aqua Modis level-3. Sebaran klorofil-a yang tinggi terlihat pada bulan Mei sampai Juli. Nilai korelasi antara klorofil-a dengan tangkapan ikan di lapangan sebesar r=0,869 yang berarti berhubungan sangat erat. Sedangkan nilai korelasi Suhu Permukaan Laut (SPL) dengan tangkapan ikan hanya sebesar r=0,387. Hal ini berarti hasil tangkapan ikan teri di Kepulauan Karimunjawa lebih dipengaruhi oleh sebaran klorofil-a dari pada SPL. Oleh karena itu dalam penentuan potensi fishing ground dengan menggunakan data MODI klimatologi bulanan, kami hanya menggunakan parameter klorofil-a. Perairan Karimunjawa memiliki kandungan klorofil-a rata rata sebesar 0,29 mg/m3. Berdasarkan analisa sebaran klorofil-a klimatologi bulanan, lokasi potensi fishing ground berada pada barat dan tenggara dari perairan Pulau Nyamuk, Barat Pulau Kemujan termasuk Pulau Cemara Besar dan Kecil, dan di perairan sekitar Pulau Parang yang dapat ditemukan disetiap bulannya. Anchovy Ground Fishing Identification (Stolephorus sp) Using Fashionable Images in the Waters of Karimunjawa, Jepara Fishing ground or fishing zone is an area in the ocean which becomes a target for fishing activities. Common target for fishing activity in Karimunjawa is anchovy. The aim of this study is to predict fishing zone on the waters of Karimunjawa based on the chlorophyll distribution and sea surface temperature by utilizing level 3 Aqua MODIS data. The high chlorophyll-a distribution is observed from May to July. The correlation value between chlorophyll-a and fish catch based on insitu data is strong with r = 0.869. Conversely, the correlation between insitu SPL correlation and fish catch is weak with r = 0.38. Therefore, we only used chlorophyll-a parameter to determine the potential fishing ground in Karimun Jawa. Karimunjawa waters have an average chlorophyll-a conscentration of 0.29 mg/m3, Based on monthly climatology of MODIS  chlorophyll data, the location of potential fishing ground is west and southeast from the waters of the island of Nyamuk, the west of Kemujan Island including Pulau Cemara Besar and Kecil, and in the waters around Parang Island which can be found every month.

oai:ojs.ejournal.undip.ac.id:article/48793 2023-06-20T04:50:15Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/48793 2023-06-20T04:50:15Z Buletin Oseanografi Marina Vol 12, No 2 (2023): Buletin Oseanografi Marina; 179-191 Riyantini, Indah; Departemen Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran Harahap, Syawaludin A.; Departemen Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran Kostaman, Alyssa N.; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran Aufaadhiyaa, Putri A.; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran MS, Yuniarti; Departemen Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran Zallesa, Sheila; Departemen Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran Faizal, Ibnu; Departemen Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran 2023-06-20 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/48793 Ikan Karang; Megabentos; Keanekaragaman; Distribusi; Taman Nasional id Biota yang berasosiasi dengan ekosistem terumbu karang cukup banyak, beberapa diantaranya yaitu ikan karang dan megabentos. Riset ini bertujuan untuk mengetahui kondisi tutupan terumbu karang dan bagaimana hubungannya dengan distribusi ikan karang, megabentos serta  kualitas perairan di Perairan Gosong Pramuka Kepulauan Seribu. Pengambilan data ikan karang menggunakan metode UVC, megabentos menggunakan metode Belt Transek dan pengambilan data terumbu karang menggunakan metode LIT. Data diambil pada 2 stasiun yang berlokasi pada wilayah terumbu karang alami dan wilayah yang terdapat media transplantasi karang dengan tiga kedalaman yaitu 3 m, 5 m, dan 7 m. Tutupan terumbu karang di Perairan Gosong Pramuka tergolong kriteria sedang. Kelimpahan ikan karang dan megabentos di kedalaman 3 m lebih tinggi daripada kedalaman lainnya dan memiliki nilai indeks keanekaragaman sedang. Hubungan ikan karang dengan terumbu karang pada riset ini menunjukan hubungan positif namun bernilai rendah yang artinya hubungan lemah, sedangkan hubungan megabentos dengan kualitas perairan di Gosong Pramuka memiliki nilai yang bervariasi yaitu terdapat hubungan positif kuat dan juga lemah.    Abundance, Diversity and Distribution of Coral Fish and Megabentos and their relationship to the condition of coral reefs and the quality of waters in Gosong Pramuka, Thousand Islands National Park There are quite a lot of biota associated with coral reef ecosystems, some of which are coral fish and megabentos.  This research aims to determine coral reef cover conditions, determine the distribution index of coral fish and megabentos and obtain a relationship between coral fish and coral reef conditions and megabentos with water quality in the Gosong Pramuka Waters of the Thousand Islands.  Pengambilan data coral fish using UVC method, megabentos using Belt Transek method and coral reef data retrieval using LIT method.  The data were taken at 2 stations located in natural coral reef areas and areas where there is a transplane media with three depths, namely 3 m, 5 m, and 7 m. Coral reef cover in Gosong Pramuka Waters is classified as a medium criterion. The abundance of reef fish and megabentos at a depth of 3 m is higher than other depths and has a moderate diversity index value. The relationship between coral fish and coral reefs in this study shows a positive but low-value relationship, which means a weak relationship, while the relationship between megabentos and the quality of waters in Gosong Pramuka has a varied value, namely there is a strong and also weak positive relationship.

oai:ojs.ejournal.undip.ac.id:article/6942 2014-05-22T03:00:25Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6942 2014-05-22T03:00:25Z Buletin Oseanografi Marina Vol 2, No 2 (2013): Buletin Oseanografi Marina; 68-77 Satriadi, Alfi; Program Studi Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2013-04-18 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6942 en Pola arus dan sebaran konsentrasi sedimen tersuspensi dalam perairan penting untuk dikaji akibat adanya pengerukan dan pembuangan sedimen .Tujuan penelitian ini adalah untuk mengetahui penyebaran sedimen tersuspensi di Pelabuhan Bojonegara, Banten untuk mendukung rencana pembangunan pelabuhan. Penelitian dilakukan dalam 3 tahap, tahap pertama pengambilan data yang dilaksanakan pada bulan Juli 2009, tahap kedua analisa laboratorium sampel sedimen dan tahap pengerjaan model matematik menggunakan software SMS (Surface Water Modelling System) dengan modul RMA2 untuk pola sirkulasi arus dan SED2D-WES untuk pola sebaran sedimen.         Hasil model menunjukkan pola sebaran konsentrasi sedimen yang mempresentasikan tingkat kekeruhan dipengaruhi oleh arus yang didominasi arus pasut. Nilai konsentrasi sedimen sebanding dengan kecepatan arus. Dari hasil simulasi memperlihatkan bahwa nilai konsentrasi sedimen tersuspensi berkisar antara 20 gr/L - 160 gr/L dan menunjukkan arah sebaran pada musim barat dominan bergerak menuju timur laut dengan sebaran terjauh pada skenario pengerukan 6,89 km; skenario pembuangan mencapai jarak 5,78 km. Sedangkan arah sebaran pada musim timur dominan bergerak menuju barat daya dengan sebaran terjauh pada skenario pengerukan 6,32 km; skenario pembuangan mencapai jarak 5,20 km (pada konsentrasi < 20 gr/L). Kata kunci : Sedimen tersuspensi, Arus, , Pelabuhan Bojonegara

oai:ojs.ejournal.undip.ac.id:article/54877 2024-05-31T07:50:39Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/54877 2024-05-31T07:50:39Z Buletin Oseanografi Marina Vol 13, No 1 (2024): Buletin Oseanografi Marina; 79-90 Rahmatullah, Amri; Program Studi Magister Oseanografi, Direktorat Pascasarjana, Sekolah Tinggi Teknologi Angkatan Laut Asmoro, Nuki Widi; Program Studi Magister Oseanografi, Direktorat Pascasarjana, Sekolah Tinggi Teknologi Angkatan Laut Azis, Muhammad; Program Studi Magister Oseanografi, Direktorat Pascasarjana, Sekolah Tinggi Teknologi Angkatan Laut Pranowo, Widodo Setiyo; Program Studi Magister Oseanografi, Direktorat Pascasarjana, Sekolah Tinggi Teknologi Angkatan Laut Badan Riset dan Inovasi Nasional Setiyadi, Johar; Program Studi Magister Oseanografi, Direktorat Pascasarjana, Sekolah Tinggi Teknologi Angkatan Laut 2024-02-06 14:07:58 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/54877 Gradien Suhu; Laut Andaman; Monsun; Struktur Termoklin id Suhu air laut menjadi salah satu parameter penting dalam bidang oseanografi. Salah satunya adalah termoklin, yaitu lapisan perairan dengan perubahan suhu yang cepat diantara lapisan yang berbeda. Karakteristik laut Andaman banyak yang belum diulas terutama pengaruh periodisitas monsun terhadap struktur lapisan termoklin. Penelitian ini menggunakan metode penelitian kuantitatif deskriptif dengan data model dari Copernicus. Tujuan penelitian ini untuk mengidentifikasi dan menganalisis karakteristik struktur lapisan termoklin di laut Andaman. Hasil pengolahan data menunjukkan lapisan termoklin dalam 4 monsun secara menyeluruh. Sebaran batas atas termoklin berada pada kisaran kedalaman 13,47-109,73 m dan suhu antara 29,87-20.36˚C. Sebaran batas bawah berada pada kisaran kedalaman antara 130,67-155,85 m dan suhu antara 23,85-16,83˚C. Karena didominasi pengaruh monsun sehingga batas atas termoklin terdangkal ditemukan pada monsun Peralihan I dan batas bawah paling dalam pada monsun Timur dan Peralihan II.  Struktur lapisan termoklin berada pada rentang ketebalan termoklin dari 17,4-80,28 m dan rata-rata ketebalan termoklin sebesar 47,18 m. Ketebalan maksimum ditemukan pada monsun Peralihan I dengan ketebalan hingga 80,28 m. Peningkatan ketebalan termoklin pada Monsun Peralihan I terjadi akibat pengaruh angin, SPL yang meningkat  dan masuknya Equatorial Jet yang membawa arus lebih hangat dan East Indian Current (EIC) yang berputar tetap searah jarum jam di Utara Laut Andaman.The sea temperature is one of the important parameters in oceanography. One of them is the thermocline, which is a layer of water with rapid temperature changes between different layers. Many characteristics of the Andaman Sea have not been reviewed, especially the effect of monsoon periodicity on the structure of the thermocline layer. This research uses descriptive quantitative research methods with model data from Copernicus.  This study aims to identify and analyze the characteristics of thermocline layer structure in the Andaman Sea. The results of data processing show the thermocline layer in 4 monsoons as a whole. The distribution of the upper boundary of the thermocline is in the range of 13.47-109.73 m depth and temperature between 29.87-20.36˚C. The lower boundary distribution is in the range of depths between 130.67-155.85 m and temperatures between 23.85-16.83˚C. Due to the dominant influence of monsoon, the shallowest upper thermocline was found in the first monsoon and the deepest lower thermocline in the second monsoon.  The thermocline layer structure ranges in thermocline thickness from 17.4-80.28 m, with an average thermocline thickness of 47.18 m. The maximum thickness is found in the Transitional I monsoon with a thickness of up to 80.28 m. The increase in thermocline thickness in Monsoon Transitional I occurs due to the influence of winds, increased SPL and the entry of the Equatorial Jet which brings warmer currents and the East Indian Current (EIC) which rotates clockwise in the North of the Andaman Sea.

oai:ojs.ejournal.undip.ac.id:article/52523 2023-11-04T02:49:24Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/52523 2023-11-04T02:49:24Z Buletin Oseanografi Marina Vol 12, No 3 (2023): Buletin Oseanografi Marina; 357-364 Yudiati, Ervia; Departement of Marine Science, Faculty of Fisheries and Marine Science, Universitas Diponegoro Arifin, Zaenal; Fisheries Research Centre, Earth and Marimite Organization Research, National Research and Innovation Agency Santoso, Adi; Departement of Marine Science, Faculty of Fisheries and Marine Science, Universitas Diponegoro Hidayati, Jelita Rahma; Department of Marine Science, Faculty of Marine and Fisheries Sciences, Universitas Maritim Raja Ali Haji Alghazeer, Rabia; Department of Chemistry, Faculty of Sciences, University of Tripoli Azhar, Nuril; Departement of Marine Science, Faculty of Fisheries and Marine Science, Universitas Diponegoro 2023-10-01 06:57:06 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/52523 Artemia; Alginate; Shrimp; Vibrio spp en Shrimp, a high-protein food commodity, is one of the world's fastest-growing food-producing sectors. The present research aimed to find out the survival and growth of Litopenaues vannamei Post Larva (PL) and the resistance against VpAHND and stress salinity. 1500 PL were reared to two sets of experiments at the density of 50 PL. L-1. The first set is purposed to determine the PL growth, resistance to Vibrio paramaemolyticus AHPND challenge and stress salinity. The second set is purposed to determine the survival rate. A Completely randomized design (CRD) with five treatments and three replications was conducted. The treatments are Artemia enrichment with different Alginate doses and probiotics (400, 600, 800 ppm Alg+pro), probiotics (Pro), and control without any synbiotics addition. PL was reared in 14 days. The survival rate, and weight gain were calculated. At the end of the experiment, 10 PL was challenged against VpAHPND at 1 x 107 CFU mL-1by immersion methods. Twenty PL was exposed to stress salinity and shocked from 25 ppt to 0 ppt. The best survival rate ((78±2%), and tolerance to osmotic stress was reached at PL fed on a combination of alginate and FNCC-002 Lactobacillus bulgaricus probiotics (p<0.05). PL fed on Artemia enriched probiotics reached the highest resistance to severe VpAHNPD. The weight gain among treatments is similar. It can be concluded that synbiotics of alginate as prebiotics and FNCC-004 probiotics work synergically and this might be interrelated with immune response.  

oai:ojs.ejournal.undip.ac.id:article/30046 2021-06-08T16:31:04Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/30046 2021-06-08T16:31:04Z Buletin Oseanografi Marina Vol 10, No 2 (2021): Buletin Oseanografi Marina; 143-150 Jamaludin, Jamaludin; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Sedjati, Sri; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Supriyantini, Endang; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2021-05-22 17:24:28 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/30046 Betahwalang,;Bahan Organik; Pasang Surut; Sedimen id Betahwalang is a coastal village located in Demak Regency. As a village located in a coastal area, the local population mostly relies on the fisheries sector sourced from sea products. Betahwalang Village has a Mangrove Ecosystem, which is included in the tidal river area of Betahwalang Village. This study aims to look at the comparison of organic matter levels in sediments during tidal and receding river water. Sampling in the field was conducted in March 2019. Sediment samples were taken from 5 stations divided into jetty, mangrove, estuary, and beach areas, where each station was repeated 3 times during high tide and low tide. Analysis of organic matter content of sediment samples using gravimetric methods and data analysis using Non-Parametric Kruskal-Wallis H. The results showed the highest levels of sediment organic matter at station 5 were 74.87 ± 1.81% (low tide) and 66.99 ± 0.38% (high tide) and the lowest sediment organic matter content. at station 4 were 31.56 ± 2.14% (low tide) and 26.93 ± 2.51% (high tide). These results indicate that the organic matter content in the sediment at low tide is higher than at high tide with results that are not significantly different (sig = 0.05).  Betahwalang adalah desa pesisir yang terletak di Kabupaten Demak. Sebagai desa yang terletak di wilayah pesisir, penduduk setempat sebagian besar mengandalkan sektor perikanan yang bersumber dari hasil laut. Desa Betahwalang memiliki Ekosistem Mangrove yang termasuk dalam wilayah sungai pasang surut di Desa Betahwalang. Tujuan dari penelitian ini adalah untuk melihat kondisi perairan sungai Betahwalang ditinjau dari kandungan bahan organik dalam sedimen selama pasang dan surut. Pengambilan sampel di lapangan dilakukan pada bulan Maret 2019. Sampel sedimen diambil dari 5 stasiun yang dibagi menjadi area dermaga, mangrove, muara dan pantai, di mana setiap stasiun diulang 3 kali selama pasang dan surut. Analisis kandungan bahan organik sampel sedimen menggunakan metode gravimetri, dan analisis data menggunakan Non-Parametrik Kruskal-Wallis H. Hasil penelitian menunjukkan kadar bahan organik sedimen tertinggi di stasiun 5 sebesar 74,87 ± 1,81% (air surut) dan 66,99 ± 0,38 % (air pasang) dan  kandungan bahan organik sedimen terendah. di stasiun 4 sebesar 31,56 ± 2,14 % (air surut) dan 26,93 ± 2,51% (air pasang). Hasil ini menunjukkan bahwa kandungan bahan organik dalam sedimen pada saat air surut lebih tinggi daripada saat air pasang dengan hasil yang tidak berbeda nyata (sig=0,05). 

oai:ojs.ejournal.undip.ac.id:article/63104 2024-11-04T07:16:45Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/63104 2024-11-04T07:16:45Z Buletin Oseanografi Marina Vol 13, No 3 (2024): Buletin Oseanografi Marina; 424-436 Wulandari, Ni Komang Putri; Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana Ernawati, Ni Made; Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana Saraswati, Ni Luh Gede Rai Ayu; Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana 2024-10-30 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/63104 Hutan Mangrove Teluk Gilimanuk; Karbon; Mangrove; Zonasi id Hutan mangrove memiliki potensi yang sangat besar dalam carbon sequestration karena mampu menyerap emisi karbon 3-5 kali lebih banyak daripada hutan tropis daratan. Penelitian ini bertujuan untuk mengetahui nilai simpanan karbon organik hutan mangrove Teluk Gilimanuk pada bulan September-November 2023. Penelitian ini dilakukan menggunakan metode transek kuadrat berukuran 10 m x 10 m yang dibuat pada zona vegetasi yang ditemukan. Data simpanan karbon pohon dianalisis menggunakan metode alometrik, sedangkan sampel sedimen dianalisis di laboratrium menggunakan metode gravimetri. Berdasarkan hasil penelitian diperoleh 6 zona vegetasi utama yaitu Sonneratia, Ceriops, Bruguiera, Avicennia, Rhizophora dan Lumnitzera. Nilai simpanan karbon atas hutan mangrove Teluk Gilimanuk tertinggi terdapat pada zona vegetasi Ceriops yaitu sebesar 66,03±17,66 ton/ha, sedangkan simpanan karbon atas terendah berada pada zona vegetasi Bruguiera sebesar 18,60±11,88 ton/ha. Nilai simpanan karbon bawah hutan mangrove Teluk Gilimanuk tertinggi terdapat pada zona vegetasi Rhizophora yaitu sebesar 44,00±32,57 ton/ha, sedangkan simpanan karbon bawah terendah berada pada zona vegetasi Lumnitzera sebesar 13,73±2,41 ton/ha. Nilai simpanan karbon organik sedimen hutan mangrove Teluk Gilimanuk tertinggi terdapat pada zona vegetasi Sonneratia sebesar 237,51±46,31 ton/ha, sedangkan simpanan karbon terendah terdapat pada zona vegetasi Avicennia sebesar 55,3678,28± ton/ha. Total simpanan karbon pada hutan mangrove Teluk Gilimanuk didapatkan sebesar 193,91 ton/ha.   Mangrove forests have immense potential for carbon sequestration as they can absorb carbon emissions 3-5 times more effectively than terrestrial tropical forests. This study aimed to determine the organic carbon storage value of the mangrove forest in Teluk Gilimanuk during September-November 2023. The research utilized a transect quadrat method with dimensions of 10 m x 10 m established in identified vegetation zones. Data on tree carbon storage were analyzed using allometric methods, while sediment samples were analyzed in the laboratory using gravimetric methods. Based on the research findings, six main vegetation zones were identified: Sonneratia, Ceriops, Bruguiera, Avicennia, Rhizophora, and Lumnitzera. The highest carbon storage value for the Teluk Gilimanuk mangrove above ground as found in the Ceriops vegetation zone at 66.03±17.66 tons/ha, whereas the lowest above ground storage was observed in the Bruguiera zone at 18.60±11.88 tons/ha. Regarding below ground carbon storage, the highest value was recorded in the Rhizophora vegetation zone at 44.00±32.57 tons/ha, while the lowest was in the Lumnitzera zone at 13.73±2.41 tons/ha. The Sonneratia vegetation zone exhibited the highest organic sediment carbon storage at 237.51±46.31 tons/ha, whereas the lowest was found in the Avicennia zone at 55,3678.28± tons/ha. The total carbon storage in the Teluk Gilimanuk mangrove forest was calculated at 193.91 tons/ha.

oai:ojs.ejournal.undip.ac.id:article/11793 2020-04-17T12:02:31Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/11793 2020-04-17T12:02:31Z Buletin Oseanografi Marina Vol 5, No 1 (2016): Buletin Oseanografi Marina; 86-96 Hartati, Retno; FPIK UNDIP Semarang Widianingsih, Widianingsih; FPIK UNDIP Semarang Djunaedi, Ali; FPIK UNDIP Semarang 2016-04-03 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/11793 en Abstrak Informasi tentang  feeding biologi pada teripang, termasuk didalamnya tentang fungsional morfologi  dan struktur dari organ – organ yang berfungsi dalam proses feeding sangat penting untuk diketahui untuk lebih memahami proses makan pada teripang. Penelitian ini bertujuan untuk menganalisis struktur jaringan alimentary canal  Teripang Putih (H. scabra) dari Pantai Pejarakan Bali dan Teripang Keling (H. atra) dari Pantai Bandengan Jepara melalui analisa histologi klasik. Hasil penelitian menunjukkan bahwa Alimentary canal Teripang Hitam dan teripang Pasir terdiri dari faring, esofagus, stomach, descending intestine 1, ascending intestine, descending intestine 2 dan cloaca.  Berdasarkan analisa histologi, struktur alimentary canal Teripang Pasir dan Teripang Hitam memiliki 3 penyusun utama, yaitu lumen, vili usus dan jaringan ikat yang merupakan serabut otot. Tiap bagian saluran pencernaan memiliki tinggi lipatan epitel vili dan ukuran vili yang berbeda, dengan lipatan tertinggi dan vili paling kecil terdapat pada bagian 4, yaitu descending intestine 1.   Kata kunci : ultrastruktur, alimentary canal, Holoturia scabra, Holoturia atra

oai:ojs.ejournal.undip.ac.id:article/38111 2022-09-07T17:08:50Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/38111 2022-09-07T17:08:50Z Buletin Oseanografi Marina Vol 11, No 2 (2022): Buletin Oseanografi Marina; 131-138 Wibowo, Eko Setio; Fakultas Biologi, Universitas Jenderal Soedirman Atang, Atang; Fakultas Biologi, Universitas Jenderal Soedirman Puspitasari, I Gusti Agung Ayu Ratna; Fakultas Biologi, Universitas Jenderal Soedirman Palupi, Endah Sri; Fakultas Biologi, Universitas Jenderal Soedirman 2022-05-20 08:04:49 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/38111 Efisiensi pakan; Nereis sp.; pakan; pertumbuhan; sintasan id Cacing Nereis sp. mampu meningkatkan pematangan sel gamet sampai 70%, sehingga berpotensi untuk dikembangkan sebagai pakan induk udang dalam usaha meningkatkan hasil produksi budidaya udang, namun selama ini pemenuhan Nereis sp. sebagai pakan masih mengandalkan penangkapan dari alam. Kondisi ini mendorong adanya usaha domistikasi atau budidaya, tetapi belum banyak informasi tentang aspek biologi Nereis sp. untuk mendukung usaha budidaya. Penelitian ini untuk mengetahui sintasan, laju pertumbuhan spesifik dan konversi pakan Nereis sp. dari wilayah pertambakan Jeruklegi Cilacap yang diberi pakan berbeda, yang diharapkan dapat memberikan informasi tentang pemberian pakan yang sesuai dan optimum untuk menghasilkan sintasan dan pertumbuhan Nereis sp. dari kawasan Jeruklegi Cilacap. Penelitian dengan menggunakan Nereis sp. immature yang dipelihara pada salinitas 15 ppt dengan tiga jenis pakan berbeda (pakan D0, tepung Spirulina sp. dan ikan hias tetra bits). Metode penelitian dilakukan secara eksperimental dengan rancangan acak lengkap (RAL) dengan 6 ulangan. Hasil penelitian menunjukkan tingkat sintasan Nereis sp. tidak dipengaruhi oleh jenis pakan yang diberikan (P>0.05), sedangkan laju pertumbuhan dan efisiensi pakan Nereis sp. dipengaruhi oleh jenis pakan yang diberikan (P<0.05). Pertumbuhan dan efisiensi pakan Nereis sp. tertinggi saat diberi pakan D0. Hasil ini menunjukkan bahwa pakan D0 dapat mendukung pertumbuhan Nereis sp. dengan lebih baik dibandingkan jenis pakan yang lain.   Nereis sp. able to increase the maturation of gamete cells up to 70%, so that it has the potential to be developed as broodstock shrimp feed to increase the yield of shrimp culture. However, so far, the fulfilment of Nereis sp. as feed still relying on capture from nature. This condition encourages domestication or cultivation, but there is not much information about the biological aspects of Nereis sp. to support cultivation business. This study was to determine the survival rate, specific growth rate and feed conversion of Nereis sp. from the Jeruklegi Cilacap pond area which were fed different feeds, which were expected to provide information on appropriate and optimum feeding to produce survival and growth of Nereis sp. from Jeruklegi area of Cilacap. The research using Nereis sp. immature, which is maintaineds at 15 ppt salinity with three different types of feed (D0, Flour of Spirulina sp. and ornamental fish feed tetra blitsz). The study was conducted experimentally with a completely randomized design method (CRD) with six replications. The results showed the level of survival of Nereis sp. not influenced by the type of feed given (P> 0.05). While the growth rate and feed efficiency of Nereis sp. influenced by the type of feed offered (P <0.05). Growth and feed efficiency of Nereis sp. highest when fed D0. These results indicate that D0 feed can support the growth of Nereis sp. better than other types of feed. 

oai:ojs.ejournal.undip.ac.id:article/2983 2012-04-03T05:55:36Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/2983 2012-04-03T05:55:36Z Buletin Oseanografi Marina Vol 1, No 1 (2011): Buletin Oseanografi Marina Purwanto, Purwanto The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/2983 en 

oai:ojs.ejournal.undip.ac.id:article/70846 2026-02-11T04:49:13Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/70846 2026-02-11T04:49:13Z Buletin Oseanografi Marina Vol 14, No 2 (2025): Buletin Oseanografi Marina; 309-321 Attaqwa, Rizal; Department Oceanography, Faculty of Fisheries and Marine Science, Universitas Diponegoro Algomarine, Universitas Diponegoro Respati, Deodato Naresvara Rayi; Department Oceanography, Faculty of Fisheries and Marine Science, Universitas Diponegoro Algomarine, Universitas Diponegoro Juviani, Dian; Department Oceanography, Faculty of Fisheries and Marine Science, Universitas Diponegoro Algomarine, Universitas Diponegoro Susilodewi, Sinta Dwis; Department Oceanography, Faculty of Fisheries and Marine Science, Universitas Diponegoro Algomarine, Universitas Diponegoro Saragih, Laurentia Alexandra; Department Oceanography, Faculty of Fisheries and Marine Science, Universitas Diponegoro Algomarine, Universitas Diponegoro Mustaqim, Ikhsan; Department Oceanography, Faculty of Fisheries and Marine Science, Universitas Diponegoro Algomarine, Universitas Diponegoro Wirasatriya, Anindya; Department Oceanography, Faculty of Fisheries and Marine Science, Universitas Diponegoro Ismunarti, Dwi Haryo; Department Oceanography, Faculty of Fisheries and Marine Science, Universitas Diponegoro 2025-06-10 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/70846 Marine Heatwaves; Sea Surface Temperature; Anomalies en Atmospheric interactions have led to a consistent rise in ocean temperatures in the Indonesian seas, exacerbated by the emergence of marine heatwaves (MHWs) that extend over thousands of kilometers. MHWs are defined as temperature anomalies above the 90th percentile of the sea surface temperature (SST) baseline for at least five consecutive days. The Savu Sea, influenced by the Indonesian throughflow that transports warm water from the Pacific to the Indian Ocean, experiences significant temperature anomalies. This study employs OSTIA L4 Marine Copernicus Global Ocean Physics Reanalysis SST data from 1982 to 2021 to analyze the frequency, duration, and intensity of MHW events in this region. Using Hobday's hierarchical approach, the study finds that MHWs in the Savu Sea lasted up to 1,170 days over 40 years, with 117 recorded events. The worst MHW event occurred in 2016, lasting 194 days with a maximum cumulative intensity of 2.0°C/year, particularly affecting the northern Savu Sea. These heatwaves significantly impact marine ecosystems, leading to coral bleaching that affects about 50% of coral colonies and threatens marine biodiversity and fisheries recovery.

oai:ojs.ejournal.undip.ac.id:article/19041 2020-04-17T12:05:38Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/19041 2020-04-17T12:05:38Z Buletin Oseanografi Marina Vol 7, No 1 (2018): Buletin Oseanografi Marina; 37-42 Patmawati, Rodhiyah; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Endrawati, Hadi; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Santoso, Adi; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2018-05-24 17:39:40 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/19041 Community Structure; Zooplankton; Panjang Island; Teluk Awur; Struktur Komunitas en Perairan Pulau Panjang dan Teluk Awur merupakan lokasi wisata dan dimanfaatkan masyarakat sebagai sumber mata pencaharian. Zooplankton berperan sebagai konsumen tingkat satu yang menghubungkan fitoplankton dengan organisme tingkat tinggi. Tujuan dari penelitian ini adalah  untuk mengetahui komposisi, kelimpahan, indeks keanekaragaman, indeks keseragaman, indeks dominansi zooplankton di perairan Pulau Panjang dan teluk Awur. Metode yang digunakan dalam penelitian ini adalah deskriptif eksploratif dan penentuan lokasi menggunakan metode purposif sampling. Penelitian ini terbagi atas 5 stasiun dengan 3 sub-stasiun di setiap stasiun. Pengambilan sampel zooplankton dengan cara aktif dengan menarik planktonet secara horizontal. Pengambilan sampel dilakukan pada bulan Januari 2017. Hasil penelitian diperoleh 31 genera zooplankton dari 8 fila di perairan Pulau Panjang dan 20 genera zooplankton dari 3 fila di perairan Teluk Awur. Kelimpahan rata-rata zooplankton berkisar antara 378 Ind/L – 892 Ind/L di perairan Pulau Panjang dan 341 Ind/L – 446 Ind/L di perairan Teluk Awur. Indeks Keanekaragaman zooplankton menunjukkan nilai  2,36 – 2,68 di perairan Pulau Panjang dan 2,29 – 2,62 di perairan Teluk Awur yang termasuk dalam kategori sedang. Indeks keseragaman zooplankton menunjukkan nilai 0,75 – 0,88 di perairan Pulau Panjang dan 0,89 – 0,94 di perairan Teluk Awur yang termasuk dalam kategori Tinggi. Indeks dominansi di kedua lokasi menunjukkan tidak ada genus tertentu yang mendominasi dengan nilai 0,12 – 0,25 di perairan Pulau panjang dan 0,07 – 0,11 di perairan Teluk Awur.  Panjang Island and Teluk Awur waters are a marine tourism places and both the waters are also utilized as a source of community livelihood. Zooplankton role is as the first-level consumer that connects phytoplankton with the high-level organisms. The purpose of this research was to know the compotition, abundance, diversity index, evennes index and dominance index of zooplankton in the waters of Panjang Island and Teluk Awur of Jepara Regency. This research used deskriptive eksplorative method and determination location used purposive sampling method. This study was divided into 5 stations and with 3 sub-stations at each station. Zooplankton sampling was horizontally active by pulling the plankton-net. Sampling was done in january 2017. The results found 31 zooplankton genera of 8 phyla in Panjang Island waters and 20 zooplankton genera of 3 phyla in Teluk Awur waters. The average abundance ranged from 378-892 ind/L in Panjang Island waters and 341-446 ind/L in Teluk Awur waters. The zooplankton Diversity Index indicated the values of 2.36 - 2.68 in Panjang Island waters and 2.29-2.62 in Teluk Awur waters  which were in the medium category. The zooplankton evenness index indicated a value of 0.75-0.88 in Panjang Island waters and 0.89-0.94 in Teluk Awur waters belonging to the High category. The dominance index at both sites indicated that no particular genus dominating with the values of 0.12 - 0.25 in Panjang Island waters and 0.07-0.11 in Teluk Awur waters.

oai:ojs.ejournal.undip.ac.id:article/45754 2023-05-13T09:22:51Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/45754 2023-05-13T09:22:51Z Buletin Oseanografi Marina Vol 12, No 1 (2023): Buletin Oseanografi Marina; 78-86 Adiningtyas, Liningga; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Supriyantini, Endang; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Widowati, Ita; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Saputri, Mimie; Doctorat Sciences et Technologie-Biologie de l’Environnement, des Populations et Ecologie, Université de La Rochelle 2023-02-04 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/45754 Perna viridis; Besi; MTI; Tambak Lorok; Semarang id Di daerah Tambak Lorok terdapat banyak aktivitas manusia, baik di daratan maupun perairan yang dapat menyebabkan peningkatan konsentrasi logam berat, salah satunya logam Fe. Salah satu organisme yang hidup di Perairan Tambak Lorok dan mampu mengakumulasi logam Fe adalah kerang hijau (Perna viridis). Penelitian ini bertujuan untuk mengetahui kandungan konsentrasi logam berat Fe dalam air, sedimen, dan jaringan lunak daging kerang hijau (P. viridis) serta untuk mengetahui tingkat keamanan konsumsi kerang hijau (P. viridis) harian terhadap logam Fe dari Tambak Lorok, Semarang. Penelitian dilakukan pada bulan Maret dan April 2021 dengan menggunakan metode eksploratif kuantitatif. Kadar logam Fe dianalisis dengan AAS (Atomic Absorption Spectrophotometer). Hasil analisis kandungan logam Fe dalam air berkisar antara 0,16-1,69 mg/L; sedimen 4,39-88,07 mg/kg; dan jaringan lunak kerang hijau (P. viridis) 0,19-2,76 mg/kg. Kandungan logam Fe dalam air menunjukkan peningkatan, sedangkan kandungan Fe dalam sedimen dan jaringan lunak kerang hijau (P. viridis) mengalami penurunan pada bulan April. Nilai BCF (Bioconcentration Factor) < 100 yang menunjukkan akumulasi kerang hijau (P. viridis) terhadap logam Fe rendah. Untuk mengetahui batas aman konsumsi daging kerang hijau per minggu dilakukan penghitungan MTI (Maximum Tolerable Intake). Batas aman konsumsi kerang hijau untuk wanita dengan berat badan 45 kg adalah 657,96 kg/minggu dan 877,28 kg/minggu bagi laki-laki dengan berat badan 60 kg.    Many human activities seen in Tambak Lorok, both on land and in waters, may cause an increase in the concentration of heavy metals, such as Fe. One of the organisms that live in Tambak Lorok Waters and are able to accumulate Fe is the green mussels (Perna viridis). This study aims to determine the concentration of Fe in water, sediment, and soft tissue of green mussel (P. viridis) and to determine the safety level of daily consumption of green mussels (P. viridis) against Fe from Tambak Lorok, Semarang. This study was conducted on March and April 2021 using quantitative exploratory methods. The metal content of Fe was analyzed by AAS (Atomic Absorption Spectrophotometer). Fe content in water ranged from 0.16 to 1.69 mg/L; sediment 4.39-88.07 mg/kg; and soft tissue of green mussels (P. viridis) 0.19-2.76 mg/kg. Fe content in water showed an increase, while the Fe content in sediment and soft tissue of green mussels (P. viridis) decreased in April. The BCF (Bio Concentration Factor) value is < 100, which indicates accumulation of green mussels (P. viridis) against Fe metal is low. To determine the safety limit of green mussel consumption per week, MTI (Maximum Tolerable Intake) was calculated. The safety limit for green mussel consumption for women weighing 45 kg is 657,96 kg/week and 877.28 kg/week for men weighing 60 kg. 

oai:ojs.ejournal.undip.ac.id:article/6930 2014-05-21T02:12:57Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6930 2014-05-21T02:12:57Z Buletin Oseanografi Marina Vol 2, No 2 (2013): Buletin Oseanografi Marina; 1-6 Sukarno, Mujahid; Jurusan Ilmu Kelautan, FPIK, Universitas Diponegoro Yusuf, Muhammad; Jurusan Ilmu Kelautan, FPIK, Universitas Diponegoro 2013-04-18 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6930 en Kondisi hidrodinamika merupakan satu aspek yang sangat berpengaruh terhadap sebaran sedimen dan polutan di perairan. Pembuangan lumpur PT. Lapindo Brantas di sungai Porong akan memberikan dampak pada kondisi fisika dan kimia perairan di muara Sungai Porong. Tujuan penelitian ini adalah untuk mengetahui kondisi hidrodinamika dengan pendekatan model matematik dan pengaruhnya terhadap pola sebaran parameter fisika-kimia perairan laut dari muara Sungai Porong. Secara umum, model hidrodinamika 2D horisontal yang dijalankan cukup mampu merepresentasikan kondisi hidrodinamika di lokasi penelitian. Hasil simulasi model menunjukkan bahwa arus cenderung memiliki arah bolak-balik sesuai dengan pasut yang terjadi. Kondisi arus di dekat pantai lebih didominasi oleh arus sepanjang pantai yang memiliki kecepatan rata-rata 0,14 m/detik dan arah dominan ke tenggara. Pola sebaran konsentrasi Ammonia, BOD, Nitrat, dan TSS secara signifikan dipengaruhi oleh pola arus yang terjadi. Kata kunci: Sebaran Parameter Fisika-Kimia Perairan, Muara Sungai Porong, Model Hidrodinamika 2D

oai:ojs.ejournal.undip.ac.id:article/73449 2026-02-11T04:57:56Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/73449 2026-02-11T04:57:56Z Buletin Oseanografi Marina Vol 15, No 1 (2026): Buletin Oseanografi Marina; 168-180 https://ejournal.undip.ac.id/index.php/buloma/article/download/73449/242455 Amrulloh, Muhamad; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Jenderal Soedirman Dewi, Rose; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Jenderal Soedirman 2026-02-25 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/73449 intensitas cahaya; klorofil-a; pertumbuhan; Spirulina platensis id Intensitas cahaya merupakan faktor utama yang memengaruhi fotosintesis, pertumbuhan, dan biosintesis pigmen pada mikroalga. Spirulina platensis memiliki kemampuan adaptasi fisiologis yang tinggi terhadap variasi cahaya, namun informasi mengenai respons pertumbuhan dan dinamika klorofil-a dalam satuan lux masih terbatas. Penelitian ini bertujuan menganalisis pengaruh intensitas cahaya terhadap kepadatan sel, laju pertumbuhan, dan kandungan klorofil-a S. platensis. Penelitian dilakukan secara eksperimental menggunakan rancangan acak lengkap dengan tiga perlakuan intensitas cahaya (500, 1029, dan 2000 lux) dan tiga ulangan. Kultivasi berlangsung selama tujuh hari dengan kepadatan awal 8,910 sel/mL menggunakan media Walne. Kepadatan sel diamati setiap hari, laju pertumbuhan dihitung pada fase eksponensial, dan klorofil-a dianalisis secara spektrofotometri. Hasil menunjukkan bahwa perlakuan 2000 lux menghasilkan kepadatan sel tertinggi (29,232 ± 8,907 sel/mL), laju pertumbuhan tertinggi (0,23 ± 0,05 hari⁻¹), serta kandungan klorofil-a tertinggi (0,333 ± 0,0085 µg/L). Uji ANOVA (α = 0,05) menunjukkan bahwa intensitas cahaya berpengaruh signifikan terhadap kandungan klorofil-a, dengan perlakuan 2000 lux berbeda nyata dibandingkan perlakuan lainnya. Analisis regresi menunjukkan hubungan positif yang kuat antara klorofil-a dan laju pertumbuhan (R² = 0,7991). Pola ini mencerminkan mekanisme fotoaklimatisasi, di mana peningkatan klorofil-a mendukung efisiensi fotosintesis dan pertumbuhan S. platensis.  Light intensity is a major factor affecting photosynthesis, growth, and pigment biosynthesis in microalgae. Spirulina platensis exhibits high physiological adaptability to light variation; however, information on growth responses and chlorophyll-a dynamics under different light intensities expressed in lux remains limited. This study aimed to analyze the effects of light intensity on cell density, growth rate, and chlorophyll-a content of S. platensis. The experiment was conducted using a completely randomized design with three light intensity treatments (500, 1029, and 2000 lux), each with three replicates. Cultivation was performed for seven days with an initial density of 8,910 cells/mL using Walne medium. Cell density was observed daily, growth rate was calculated during the exponential phase, and chlorophyll-a content was determined spectrophotometrically. The results showed that 2000 lux produced the highest cell density (29,232 ± 8,907 cells/mL), growth rate (0.23 ± 0.05 day⁻¹), and chlorophyll-a content (0.333 ± 0.0085 µg/L). One-way ANOVA (α = 0.05) indicated that light intensity significantly affected chlorophyll-a content, with the 2000 lux treatment being significantly different from the other treatments. Regression analysis revealed a strong positive relationship between chlorophyll-a content and specific growth rate (R² = 0.7991). These results reflect photoacclimation mechanisms, in which increased chlorophyll-a enhances photosynthetic efficiency and growth of S. platensis. 

oai:ojs.ejournal.undip.ac.id:article/27431 2020-09-27T10:49:01Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/27431 2020-09-27T10:49:01Z Buletin Oseanografi Marina Vol 9, No 1 (2020): Buletin Oseanografi Marina; 19-26 Wishnu, Narendra Prasidya; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Hartati, Retno; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Suprijanto, Jusup; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Soenardjo, Nirwani; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Santosa, Gunawan Widi; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2020-04-30 08:00:12 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/27431 Anadara sp.; substrat lunak; bivalvia en Muara Sungai Wulan yang terletak di Pantai Demak, Jawa Tengah,merupakan habitat yang baik bagi komunitas makrozoobentos. Habitat tersebutdicirikan dengan sedimen pasir, lanau dan lempung, karena pada beberapa tempat merupakan substrat dasar lunak yang didominasi oleh sedimen lanau. Identifikasi jenis makrozoobentos dan analisis keanekaragamannya penting untuk menentukan kondisi ekosistem substrat lunak tersebut.Tujuan dari penelitian ini adalah untuk mengidentifikasi jenis dan mengetahui struktur komunitas makrozoobentos pada substrat lunak di perairan Delta Wulan, Demak. Metode survei eksploratif diaplikasikan pada penelitian ini dan purposive random sampling dilakukan pada saat mengambil sample sedimen pada12 titik penelitian dengan menggunakan van veen grab sampler. Analisa makrozobentos dan ukuran butir dilakukan terhadap sampel sedimen. Penelitian menemukan 24 spesies makrozoobentos yang termasuk dalam 4 filum, yaitu Arthropoda, Cnidaria, Echinodermata dan Moluska. Titik 5 adalah titik dengan nilai kelimpahan dan keanekaragaman tertinggi adalah Anadara. Terdapat dominansi 4 species yang berbeda disemua titik pengambilan sampel, yaitu Anadara sp., Paphia sp., Cominella sp. dan Gemmula sp. Sedimen pada daerah penelitian termasuk klasifikasi lanau komposisi pasir 2,5-22,14%, lanau 67,82-94,79% dan lempung 0-22,86% serta kandungan bahan organik total yang dikategorikan rendah-sedang dengan nilai berkisar 3,0-14,83%. Adanya dominasi jenis tersebut, maka substrat lunak merupakan habitat yang baik untuk moluska, khususnya bivalvia, sehingga daerah tersebut menjadi tempat penangkapan kerang.  Wulan estuary, located in Demak regency, Central Java, is a suitable habitat for the macrozoobenthos community. The habitat is characterized by sand, silt, and clay sediments, which in some places are soft substrates dominated by silt sediments. Identification of macrozoobenthos types and diversity analysis is important to determine the condition of the soft substrate ecosystem. The purpose of this study was to identify species and determine the structure of the macrozoobenthos community on soft substrates in the waters of Delta Wulan, Demak. Explorative survey method was applied in this study while purposive random sampling was carried out to collect the sediment samples at 12 research stations using a Van Veen grab sampler. Macrozoobenthos and grain size analyzes were performed used the sediment samples obtained. The study found 24 species of macrozoobenthos, which included 4 phyla, namely Arthropods, Cnidaria, Echinoderms and Molluscs. Station 5 has the highest value of abundance and diversity Anadara. Four different genera are dominant at all sampling points, namely Anadara sp., Paphia sp., Cominella sp., and Gemmula sp. Sediments in the study area included silt classification in which the composition of sand 2,5-22,14%, the silt of 67,82-94,79%, and loam of 0-22,86% and total organic matter content which was categorized as low-moderate with values ranging from 3,0-14,83%. The dominance evidence in this estuary concluded that soft substrate is a suitable habitat for mollusks, primarily bivalves; therefore this was the capture area of bivalve.

oai:ojs.ejournal.undip.ac.id:article/6956 2014-05-22T09:15:25Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6956 2014-05-22T09:15:25Z Buletin Oseanografi Marina Vol 2, No 3 (2013): Buletin Oseanografi Marina; 104-115 Jayanto, Bogi B; PS. Pemanfaatan Sumberdaya Perikanan, Jurusan Perikanan Fakultas Perikanan dan Ilmu Kelautan, UNDIP 2013-07-22 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6956 en Alat tangkap garuk yang ada di daerah Tambak Lorok Semarang terdiri dari 3 jenis garuk, yaitu garuk biasa, garuk modifikasi dengan rantai dan garuk modifikasi dengan timbal. Adanya modifikasi alat tangkap garuk ini disebabkan oleh karena kurang efektifnya penangkapan udang jika menggunakan penggaruk, karena untuk penangkapan udang sebenarnya cukup dengan desain yang berfungsi untuk mengaduk permukaan substrat dasar perairan sehingga udang akan meloncat untuk masuk dalam cakupan alat tangkap. Penelitian ini bertujuan untuk  menganalisis hasil tangkapan udang putih (Penaeus merguiensis) dari 3 jenis garuk udang dan menganalisis perbandingan kelayakan usaha dari 3 jenis alat tangkap garuk udang. Metode penelitian yang digunakan adalah metode deskriptif studi kasus. Pengambilan sampel  hasil tangkapan udang dilakukan pada 3 jenis alat tangkap Garuk Udang selama 3 bulan dengan setiap bulannya diambil data 10 hari.  Pengumpulan data dilakukan dengan observasi langsung dan wawancara terhadap nelayan. Analisis teknis dengan membandingkan antara garuk udang biasa dengan garuk udang modifikasi rantai. Sedangkan analisis kelayakan usaha membandingkan antara garuk udang biasa dengan garuk udang modifikasi rantai dengan menggunakan undiscounted criteria yaitu R/C Ratio, Payback Period, Break Event Point. Hasil penelitian menunjukkan bahwa diantara 3 jenis alat tangkap garuk udang yang ada di Tambak Lorok Semarang, Garuk Udang Modifikasi Timah merupakan alat tangkap yang terbaik, dengan hasil tangkapan udang selama 30 hari sebesar 194,64 kg. Berdasarkan analisa usahanya alat tangkap garuk udang biasa mempunyai nilai R/C 1,45, PP 4,67 tahun, BEP produksi 191,75 kg dan BEP harga Rp. 53.683,-/kg. Alat tangkap garuk udang modifikasi rantai mempunyai nilai R/C 1,74, PP 2,89 tahun, BEP produksi 192,50 kg dan BEP harga Rp. 29.358,-/kg.  Sedangkan Alat tangkap garuk udang modifikasi timah mempunyai nilai R/C 1,91, PP 2,37 tahun, BEP produksi 192,63 kg dan BEP harga Rp. 25.549,-/kg. Alat tangkap garuk udang modifikasi timah merupakan alat tangkap yang terbaik dibandingkan alat tangkap garuk udang yang lain. Kata kunci : Garuk Udang, produksi,  kelayakan usaha.

oai:ojs.ejournal.undip.ac.id:article/32169 2021-02-01T08:06:49Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/32169 2021-02-01T08:06:49Z Buletin Oseanografi Marina Vol 10, No 1 (2021): Buletin Oseanografi Marina; 23-32 Taofiqurohman, Ankiq; Universitas Padjadjaran Faizal, Ibnu; Universitas Padjadjaran Rizkia, Kholid Agil; Universitas Padjadjaran 2021-02-01 10:08:05 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/32169 Coral Watch; Kesehatan Karang; Sepa, Snorkeling; Tipe Karang id Kepulauan Seribu merupakan gugusan pulau di perairan utara Jakarta yang memiliki daya tarik wisata terutama untuk snorkeling dan diving dengan adanya terumbu karang, salah satunya adalah Pulau Sepa. Ekosistem terumbu karang merupakan ekosistem yang rentan mengalami degradasi oleh berbagai faktor. Kegiatan snorkeling menjadi salah satu  ancaman yang terjadi pada terumbu karang, oleh karena itu diperlukan pengukuran mengenai kondisi kesehatan ekosistem terumbu karang, khususnya Pulau Sepa kepulauan Seribu, sebagai bentuk integrasi konservasi ekosistem dan pengelolaan wisata. Riset ini dilakukan di Pulau Sepa, Taman Nasional Kepulauan Seribu pada Bulan Maret-Agustus 2020. Wilayah yang diamati merupakan spot snorkeling pada kedalaman 1-5 m pada 10 stasiun penelitian  , dengan mengklasifikasikan warna kesehatan dan juga tipe karang menggunakan klasifikasi dari Coral Watch.  Skor warna kesehatan terumbu karang pada zona snorkeling Pulau Sepa, didominasi dengan kondisi kurang sehat pada skor warna 4, dengan dominasi tipe karang branching dan boulder dan sedikit tipe pertumbuhan plate dan soft. Kriteria kesehatan terumbu karang mayoritas berada pada kurang sehat, sedikit sehat dan tidak ditemukan yang tidak sehat. Rincian kriteria kesehatan terumbu karang kurang sehat di temui pada stasiun 1-10 dengan masing masing persentase 92%, 72%, 100%, 94%, 78%, 94%, 100%, 100%, 67%, dan 89%, untuk rincian kriteria kesehatan terumbu karang sehat pada stasiun 1-10 dengan masing-masing persentase 8%, 28%, 0%, 6%, 22%, 6%, 0%, 0%, 33%, 11%. Faktor lingkungan seperti kecerahan yang dipengaruhi oleh sedimentasi serta tekanan antropogenik dari aktivitas manusia mempengaruhi kondisi tutupan karang di pulau ini. The Thousand Islands are a group of islands in the northern waters of Jakarta which have tourist attractions, especially for snorkeling and diving with the presence of coral reefs, one of which is Sepa Island. Coral reef ecosystem is an ecosystem that is prone to degradation by various factors. Snorkeling activities are one of the threats that occur on coral reefs, therefore it is necessary to measure the health condition of coral reef ecosystems, especially Sepa Island, the Thousand Islands, as a form of integration of ecosystem conservation and tourism management. This research was conducted on Sepa Island, Thousand Islands National Park on March - August 2020. The area observed is a snorkeling spot at a depth of 1-5 m at 10 research stations, by classifying the color of health and also the type of coral using the classification from Coral Watch. The coral reef health color score in the Sepa Island snorkeling zone, was dominated by unhealthy conditions at a color score of 4, with a dominance of branching and boulder coral types and few plate and soft growth types. The majority of coral reef health criteria are unhealthy, slightly healthy and not found unhealthy. Details of the health criteria for unhealthy coral reefs were found at stations 1-10 with each percentage of 92%, 72%, 100%, 94%, 78%, 94%, 100%, 100%, 67%, and 89%, respectively. details of health criteria for healthy coral reefs at stations 1-10 with each percentage of 8%, 28%, 0%, 6%, 22%, 6%, 0%, 0%, 33%, 11%. Environmental factors such as clarity which influenced by sedimentation and anthropogenic factors from human activities affect the condition of coral cover on this island.

oai:ojs.ejournal.undip.ac.id:article/58022 2024-11-04T07:16:45Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/58022 2024-11-04T07:16:45Z Buletin Oseanografi Marina Vol 13, No 3 (2024): Buletin Oseanografi Marina; 327-340 Widyani, Afidhah Puspita; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Amalya, Afroh; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Adiprabowo, Samuel Radityo; Pusat Meteorologi Maritim Badan Meteorologi Klimatologi dan Geofisika Suwignyo, Tyo; Pusat Meteorologi Maritim Badan Meteorologi Klimatologi dan Geofisika Ismanto, Aris; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Maslukah, Lilik; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2024-10-30 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/58022 Gelombang Laut; Pemodelan Gelombang Laut; Pemodelan SWAN; Siklon Tropis Dahlia id Secara umum Indonesia tidak termasuk wilayah yang dilintasi oleh siklon tropis dikarenakan sifat fisik siklon  tropis yang selalu menjauh dari ekuator. Namun sejumlah siklon tropis yang terjadi di sekitar wilayah Indonesia memberikan dampak secara tidak langsung di wilayah Indonesia. Samudera Hindia merupakan salah satu wilayah yang memiliki tingkat pertumbuhan siklon tropis paling subur. Salah satu siklon yang pernah terjadi di wilayah tersebut yaitu Siklon Tropis Dahlia. Dampak dari Siklon Tropis Dahlia pada wilayah Indonesia khususnya bagian pesisir selatan Banten yaitu timbulnya angin yang kencang disertai gelombang laut yang tinggi. Penelitian ini bertujuan untuk mengetahui pengaruh Siklon Tropis Dahlia terhadap karakteristik gelombang laut di pesisir selatan Banten. Penelitian ini dilakukan dengan menggunakan pemodelan SWAN (Simulating Wave Near-Shore). Hasil dari pemodelan menunjukkan nilai kecepatan angin tertinggi mencapai 16 m/s dan ketinggian gelombang signifikan mencapai 3.5 m dengan arah propagasi dari barat Sumatera menuju tenggara hingga selatan Jawa. Secara umum, luaran model SWAN dapat menggambarkan tren variabilitas gelombang laut akibat dari adanya pengaruh Siklon Tropis Dahlia. Generally, Indonesia is not directly impacted by tropical cyclones due to the physical nature of these cyclones, which tend to move away from the equator. However, several tropical cyclones that occur near Indonesia have indirect effects on the region. The Indian Ocean is one of the most active areas for tropical cyclone development. One such cyclone that affected this area was Tropical Cyclone Dahlia. The impact of Tropical Cyclone Dahlia on Indonesia, particularly along the southern coast of Banten, includes strong winds and high sea waves. This study aims to understand the influence of Tropical Cyclone Dahlia on the characteristics of sea waves along the southern coast of Banten using SWAN (Simulating Wave Near-Shore) modeling. The results show that wind speeds reached up to 16 m/s, and significant wave heights reached 3.5 meters, with wave propagation from the west of Sumatra towards the southeast and south of Java. Overall, the SWAN model outputs effectively capture the trend of sea wave variability due to the influence of Tropical Cyclone Dahlia.

oai:ojs.ejournal.undip.ac.id:article/11291 2020-04-17T12:01:33Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/11291 2020-04-17T12:01:33Z Buletin Oseanografi Marina Vol 5, No 1 (2016): Buletin Oseanografi Marina; 14-20 Supriyantini, Endang; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Sedjati, Sri; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Nurfadhli, Zidny; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2016-04-03 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/11291 en Lamun (seagrass) adalah tanaman air yang berbunga (Antophyta) dan mempunyai kemampuan beradaptasi untuk hidup dan tumbuh di lingkungan laut. Pantai Kartini merupakan kawasan yang strategis, karena sebagai jalur transportasi laut menuju obyek wisata Taman laut Nasional Karimunjawa dan Pulau Panjang. Pantai Kartini merupakan dermaga bagi kapal-kapal besar dan kapal-kapal pariwisata, kegiatan perdagangan, pariwisata serta fasilitas wisatawan yang diduga menjadi sumber logam berat Seng (Zn). Keberadaan lamun di laut dapat menjadi bioindikator pencemaran logam berat karena meyerap dan mengakumulasi bahan pencemar. Logam berat umumnya mempunyai sifat toksik dan berbahaya bagi organisme hidup, walaupun beberapa diantaranya diperlukan dalam jumlah kecil E. acoroides dan T. hemprichii diambil dari 3 stasiun penelitian yang telah ditetapkan. Pengambilan sampel lamun E. acoroides dan lamun T. hemprichii dilakukan dengan memilih lamun yang tua dengan ciri-ciri warna daun lebih pekat dan memiliki tekstur daun yang lebih keras, serta memiliki bagian-bagian yang lengkap dan pengambilan sampel dilakukan dengan cara mencabut hingga akar-akarnya sebanyak 3 tegakan setiap stasiun. Parameter lingkungan seperti suhu, salinitas, oksigen terlarut, kecerahan, pH dan arus diukur secara in situ. Hasil penelitian menunjukkan nilai akumulasi logam berat Zn (Seng) pada akar E. acoroides berkisar antara 0,98 – 2,06 mg/kg dan pada Daun 0,60 – 1,01 mg/kg, sedangkan akumulasi logam berat Zn (Seng) pada akar T. hemprichii berkisar antara 0,32 – 0,53 mg/kg dan pada daun 0,95 – 1,21 mg/kg. Kemampuan lamun   E. acoroides dan Thalassia hemprichii di Pantai Kartini dalam mengakumulasi logam berat Seng (Zn) termasuk dalam kategori rendah dengan nilai faktor biokonsentrasi rata-rata < 250.   Kata Kunci : E. acoroides, T. hemprichii, Seng (Zn), Faktor Biokonsentrasi (BCF)

oai:ojs.ejournal.undip.ac.id:article/38199 2022-05-20T01:15:04Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/38199 2022-05-20T01:15:04Z Buletin Oseanografi Marina Vol 11, No 1 (2022): Buletin Oseanografi Marina; 41-50 Alam, Bima Fatah; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Wijayanti, Diah Permata; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Munasik, Munasik; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2022-01-30 16:19:35 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/38199 Vessel Grounding; Density; Composition Genus; Juvenile Coral; Tanjung Gelam id Taman Nasional Karimunjawa (TNKJ) memiliki ekosistem terumbu yang cukup baik. Peningkatan jumlah kunjungan ke kawasan TNKJ menyebabkan kawasan terumbu mendapat ancaman serius, salah satunya dari kemungkinan tertabrak kapal (vessel grounding). Salah satu kasus terjadi pada tanggal 7 September 2018 ketika kapal Tug Boat PM 202 kandas di perairan Tanjung Gelam di Zona Tradisional Perikanan (ZTrP) yang menyebabkan terjadinya kerusakan di 11 bagian (Patch). Hingga kini upaya monitoring kondisi terumbu karang pada area kerusakan setelah kejadian kandas kapal belum pernah dilakukan. Penelitian ini bertujuan untuk mengetahui keberhasilan rekruitmen alami, komposisi jenis juvenil dan densitas rekruit karang pada area kapal kandas. Pendataan juvenil karang pada 11 patch kerusakan dilakukan dengan menggunakan transek kuadran.  Pendataan karang pada lokasi yang tidak terdampak kerusakan juga dilakukan menggunakan metode Underwater Photo Transect (UPT) untuk mengetahui kondisi terumbu di sekitar kapal kandas. Pengamatan hanya menemukan 4 patch, yaitu patch 4, 5, 6 dan 7, sehingga pendataan hanya dilakukan pada ke-4 patch tersebut. Total rekruit yang ditemukan pada keempat patch berjumlah 40 koloni dengan nilai densitas rekruit  sebesar 1,88 koloni/m2. Keseluruhan rekruit di seluruh lokasi pengamatan termasuk dalam 10 genera yaitu Acropora, Astreopora, Coeloseris, Favia, Fungia, Goniastrea, Montipora, Pavona, Pocillopora dan Porites. Juvenil karang terbanyak adalah Porites dengan persentase kemunculan sebesar 23% dan kemunculan terendah adalah Pocillopora dan Pavona masing-masing sebesar 2,5 %. Hasil analisis menggunakan CPCe versi 4.1 (Coral Point Count with Excel extension) diperoleh nilai tutupan karang keras hidup yang tidak terkena dampak tertabraknya kapal termasuk dalam kategori baik dengan kerapatan 66.87 %. Genus kemunculan karang terbanyak adalah Porites dan terendah Galaxea. Hasil penelitian menunjukkan bahwa densitas juvenil yang ditemukan di lokasi kandas kapal terkategori rendah. Monitoring lanjutan perlu dilakukan untuk mengetahui akibat lebih jauh terumbu yang tertabrak kapal dan keberhasilan rekrutmen alami. Karimunjawa National Park (TNKJ) has a fairly good reef ecosystem. The increase in the number of visits to the TNKJ area has caused serious threats, one of which is the possibility of being hit by vessel grounding. One of the cases occurred on September 7, 2018 when the Tug Boat PM 202 crashed in the waters of Tanjung Gelam in the Traditional Fishing Zone (ZTrP) which caused damage in 11 sections (Patch). Until now, efforts to monitor the condition of coral reefs in the area of damage after the shipwreck have never been carried out. This study aims to find out the success of natural recruitment, composition of juvenil type and density of coral recruit in the area of the ship wreck. Data collection of coral juvenil on 11 patches of damagearea  is done using quadrant transfect.  Coral cover at un- impacted locations is also carried out to determine the condition of the reef around  the shipwreck. Data collection is done using Underwater Photo Transect (UPT) method. Observations can only find 4 patches, namely patches 4, 5, 6 and 7, therefore observation was done only on the 4 patches.  The total recruitment found 40 colonies with a recruit density value of 1.88 colonies/m2. All recruitments in all observation sites are included in 10 genera namely Acropora, Astreopora, Coeloseris, Favia, Fungia, Goniastrea, Montipora, Pavona, Pocillopora and Porites. The largest coral juvenil is genus Porites with a percentage of appearance of 23% and the lowest appearance is the Pocillopora and Pavona of 2.5%. The results of the analysis using CPCe version 4.1 (Coral Point Count with Excel extension) obtained the value of living hard coral cover fall into the category of good with a density of 66.87%. There were 13 genera observed with Porites showed the highest appearance and the lowest is Galaxea.The results showed that the juvenile density found at the shipwreck site was categorized as low. Further monitoring needs to be carried out to find out more about the impact on reefs being hit by ships and the success of natural recruitment.

oai:ojs.ejournal.undip.ac.id:article/65378 2026-02-11T04:49:13Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/65378 2026-02-11T04:49:13Z Buletin Oseanografi Marina Vol 14, No 2 (2025): Buletin Oseanografi Marina; 190-204 Tsabita, Alika; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran Sunarto, Sunarto; Departemen Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran MS, Yuniarti; Departemen Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran Pamungkas, Wahyuniar; Departemen Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran 2025-06-10 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/65378 Rehabilitasi Mangrove; Kualitas Air; Pulau Harapan id ulau Harapan merupakan salah satu wilayah di Kepulauan Seribu yang melakukan rehabilitasi mangrove dengan jenis Rhizophora stylosa sejak tahun 2005. Tetapi, pertumbuhan diameter batang mangrove yang cenderung lambat menjadikan rehabilitasinya tidak optimal. Tujuan dilaksanakannya riset ini adalah untuk menganalisis faktor lingkungan yang memengaruhi kondisi mangrove hasil rehabilitasi di Pulau Harapan. Metode yang digunakan yakni survei lapangan untuk mendapatkan data kondisi mangrove, data faktor lingkungan berupa suhu, salinitas, pH, DO, nitrat, fosfat, serta jenis substrat dari ekosistem mangrove. Untuk mengetahui keterkaitan kondisi mangrove dengan faktor lingkungan, dilakukan Principal Component Analysis. Terdapat 3 stasiun pengamatan pada penelitian yang ditentukan menggunakan metode purposive sampling dengan pertimbangan utama berupa perbedaan kondisi lingkungan. Hasil penelitian menunjukkan bahwa mangrove hasil rehabilitasi di Pulau Harapan berada dalam kondisi baik dan sangat padat. Tetapi, jarak penanaman yang terlalu dekat serta tidak dilakukannya penjarangan saat mangrove mulai tumbuh besar menyebabkan ketidakcukupan ruang untuk mangrove dapat tumbuh dengan baik. Kondisi mangrove di Pulau Harapan yang berupa kerapatan dan pertumbuhan, utamanya dipengaruhi oleh substrat pada ekosistem mangrove yang kasar serta kandungan nutrien dengan konsentrasi yang cukup tinggi, dimana konsentrasi fosfat berkisar 0,038 – 0,062 mg/L dan konsentrasi nitrat berkisar 0,059 – 0,461 mg/L. Selain itu, faktor lingkungan lain seperti nilai pH yang berada di bawah baku mutu yang telah ditetapkan serta kondisi perairan Pulau Harapan yang termasuk dalam kategori tercemar ringan turut berpengaruh pada kondisi mangrove. Harapan Island is one of the areas in the Thousand Islands that has been rehabilitating mangroves with the type Rhizophora stylosa since 2005. However, the slow growth of mangrove trunk diameter makes the rehabilitation not optimal. The purpose of this research is to analyze environmental factors that affect the condition of rehabilitated mangroves on Harapan Island. The method used is a field survey to obtain data on mangrove conditions, environmental factor data in the form of temperature, salinity, pH, DO, nitrate, phosphate, and substrate types from mangrove ecosystems. To determine the relationship between mangrove conditions and environmental factors, a Principal Component Analysis was conducted. There are 3 observation stations in the study that are determined using the purposive sampling method with the main consideration being differences in environmental conditions. The results of the study show that the rehabilitated mangroves on Harapan Island are in good condition and very dense. However, the planting distance that is too close and the lack of thinning when the mangroves begin to grow large causes insufficient space for mangroves to grow properly. The condition of mangroves on Harapan Island, which is in the form of density and growth, is mainly influenced by the substrate in the mangrove ecosystem which is rough and the nutrient content with a fairly high concentration, where the phosphate concentration ranges from 0.038 – 0.062 mg/L and the nitrate concentration ranges from 0.059 – 0.461 mg/L. In addition, other environmental factors such as pH values that are below the predetermined quality standards and the condition of the waters of Harapan Island which are included in the lightly polluted category also affects the condition of mangroves.

oai:ojs.ejournal.undip.ac.id:article/16559 2020-04-17T12:04:48Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/16559 2020-04-17T12:04:48Z Buletin Oseanografi Marina Vol 6, No 2 (2017): Buletin Oseanografi Marina; 102-109 Awanis, Annisa Amalia; Departemen Akuakultur, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Prayitno, Slamet Budi; Departemen Akuakultur, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Herawati, Vivi Endar; Departemen Akuakultur, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2017-11-18 00:38:55 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/16559 Vaname shrimp; Geographic Information System; Water Quality; Oxygen Need; Udang vaname; Sistem Informasi Geografis; Kualitas Air; Kebutuhan Oksigen en Desa Wonorejo, Kecamatan Kaliwungu, Kabupaten Kendal, Jawa Tengah memiliki suatu usaha budidaya udang vaname, untuk meningkatkan hasil produksi maka diperlukan usaha perluasan lahan budidaya, namun terdapat beberapa kendala dalam penentuan lokasi ini yaitu dibutuhkannya banyak biaya, waktu serta tenaga. Sistem Informasi Geografis (SIG) menjadi solusi yang tepat dalam penentuan lokasi yang sesuai untuk pengembangan budidaya udang vaname. Tujuan dari penelitian ini adalah untuk mengkaji kesesuaian lahan tambak  udang vaname di Desa Wonorejo, Kecamatan Kaliwungu, Kabupaten Kendal, Jawa Tengah berdasarkan analisa SIG. Metode yang digunakan dalam penelitian adalah metode survey yaitu dengan cara pengukuran langsung ke lapangan dan wawancara dengan pembudidaya udang vaname. Data yang telah didapatkan diolah dengan menggunakan aplikasi ArcGis 10.0. Beberapa tahapan dalam pengolahan data yaitu pembuatan peta dasar, pembuatan peta kontur sebaran spasial dari setiap parameter, overlay, layout dan skoring. Data yang dihasilkan berupa model spasial. Analisa kesesuaian perairan dilakukan dengan pembuatan matriks kesesuaian kemudian pembobotan dan perhitungan skor berdasarkan tingkat pengaruh dari setiap parameter terhadap daerah yang berpotensi untuk budidaya udang vaname. Hasil yang didapatkan pada penelitian ini adalah suhu berkisar antara 27,86-29,5oC, salinitas berkisar antara 10-20 ppt, kedalaman berkisar antara 100-140 cm, kecerahan berkisar antara 20-40 cm, pH berkisar antara 7,9-8,5, DO berkisar anatara 3,67-6,67 mg/l, nitrat berkisar antara 4,8210-74,7669 mg/l dan  fosfat berkiar antara 0,0394-0,0758 mg/l. Kesimpulan yang dapat diambil adalah bahwa secara umum kondisi perairan di Wonorejo, Kecamatan Kaliwungu, Kabupaten Kendal dapat mendukung usaha budidaya udang vaname. Total luas wilayah tambak di Wonorejo adalah 13,6 ha, dari luasan wilayah yang diamati 2 ha tergolong kedalam kategori sesuai (S2) dan 13,4 ha tergolong kedalam kategori sangat sesuai (S3).    Wonorejo is a village in Kaliwungu sub distinct, Kendal, Central Java. That one of the vaname shrimp products in the area. The high potential of brackishwater ponds resulted in the expansion of shrimp ponds. However, the expansion was not carreid out based on the scientific but merely based on the feeling of the farmers. Geographic Information System (GIS) was aim to alternatively overcome this problem, so that the potential suitable location could be applied. The aim of this methods was to study the suitability of shrimp ponds in Wonorejo village, Kaliwungu sub distinct, Kendal, Central Java based on GIS. The data was obtained through satelite (map). and interview with farmers and district measurements in field. The data was analysed by ArcGis 10.0. The analyses were implemented in 5 steps namely production of basic map, production of spartial control map of each parameters, overlayed,layout and score. Suitability analysis  was done by calculating the score of parameter then presented with reference. The result showed that temperature ranges between 27,86-29,5oC, salinity ranges between 10-20 ppt, depth ranges between 100-140 cm, brightness ranges between 20-40 cm, pH ranges between 7,9-8,5, DO ranges between 3,67-6,67 mg/l, nitrat  ranges between 4,8210-74,7669 mg/l , and fosfat ranges between 0,0394-0,0758 mg/l. In general shrimp pondsin Wonorejo Village, Kaliwungu, Kendal was suitable vaname cultivation. From total shrimp pond area in Wonorejo Village, Kaliwungu 13,6 Ha, 2 Ha was classified as suitable (S2) and 13,4 Ha was classified as very suitable (S3). 

oai:ojs.ejournal.undip.ac.id:article/19043 2018-05-23T10:52:59Z buloma:ART

oai:ojs.ejournal.undip.ac.id:article/6920 2014-05-20T04:18:12Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6920 2014-05-20T04:18:12Z Buletin Oseanografi Marina Vol 2, No 1 (2013): Buletin Oseanografi Marina; 7-16 Satriaji, Dedi Edwin; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Dipenogoro Pratikto, Ibnu; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Dipenogoro Endrawati, Hadi; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Dipenogoro 2013-01-20 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6920 en Pemukiman penduduk, industri dan nelayan di sekitar perairan Mangunharjo akan memberikan dampak berupa limbah organik yang akan mengubah dinamika maupun fungsi ekologis di Perairan Desa Mangunharjo. Hal tersebut berdampak terhadap keberadaan populasi dari ikan-ikan residen muara. Oleh karena itu dibutuhkan suatu pengamatan lebih lanjut mengenai bioekologi populasi ikan di Perairan Mangunharjo, Kec. Tugu. Semarang. Tujuan dari penelitian ini adalah untuk mengetahui struktur komunitas dan bioekologi ikan berdasarkan pertumbuhan, hubungan panjang berat, dan faktor kondisi di wilayah perairan Mangunharjo Kec. Tugu, Semarang Metode yang digunakan dalam penelitian ini bersifat eksploratif dan data dianalisis secara deskriptif. Lokasi sampling, yaitu Perairan Mangunharjo, ditetapkan berdasarkan metode pertimbangan (Purposive sampling method). Pengambilan sampel dilakukan sebanyak lima kali pada bulan Mei-Juli 2012 dengan interval waktu 2 minggu. Pengambilan sampel ikan dilakukan dengan menggunakan alat tangkap Trammel Net. Selanjutnya analisis Sampel dilakukan di Laboratorium Biologi Laut, Jurusan Ilmu Kelautan, FPIK, UNDIP. Hasil penelitian menunjukan telah ditemukan 24 famili dan 41 spesies. Kelimpahan diperoleh rata-rata berdasarkan waktu sampling adalah 0,060 ind/m2, Indeks Keanekaragaman (H’) menunjukan Presentase kategori sedang (65%), Indeks Keseragaman (e) tinggi (85%), dan indeks Dominasi (C) Menunjukan tidak ada jenis yang mendominasi (TAD) dengan kisaran nilai (0,1 – 0,4). Hasil penelitian menunjukan populasi ikan belanak yang dijumpai di Perairan Mangunharjo menunjukan model pertumbuhan panjang berdasarkan persamaan von Bertalanffy adalah Lt = 11.98592 (1 - e –0.071(t-0.50345)), sedangkan model pertumbuhan berat adalah Wt = 28.0678 (1 - e –0.059(t-0,4854)). Hubungan panjang berat ikan belanak (Ellochelon vaigiensis), di perairan Mangunharjo menghasilkan persamaan W = 0.048 L 2.45 dan bersifat allometrik negatif. Faktor kondisi ikan belanak berkisar antara 0.8954 – 1.3445 dengan nilai rata-rata faktor kondisi 1,16417. dimana lingkungan perairan Mangunharjo mendukung kehidupan ikan belanak.   Kata Kunci : Struktur Komunitas, Bioekologi, Ikan Belanak

oai:ojs.ejournal.undip.ac.id:article/78550 2026-02-11T04:57:56Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/78550 2026-02-11T04:57:56Z Buletin Oseanografi Marina Vol 15, No 1 (2026): Buletin Oseanografi Marina; 55-69 Haryati, Ani; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Jenderal Soedirman Ashari, Diva Nasywaa; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Jenderal Soedirman Prihatiningsih, Isnaini; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Jenderal Soedirman Januar, Hedi Indra; Pusat Riset Ekologi dan Ethnobiologi, Badan Riset dan Inovasi Nasional 2026-02-25 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/78550 geoakumulasi indeks; konsentrasi faktor; risiko ekologis; unsur kelumit id Aktivitas antropogenik di kawasan pesisir Desa Mojo, Estuari Sungai Comal, berpotensi meningkatkan masukan logam berat ke lingkungan perairan. Sedimen di muara berperan sebagai penyerap dan penyimpan utama logam berat, sehingga mencerminkan tingkat pencemaran dan risiko ekologis perairan. Penelitian ini bertujuan menilai status pencemaran dan potensi risiko ekologis logam timbal (Pb), arsen (As), kobalt (Co), dan kromium (Cr) pada sedimen permukaan Estuari Sungai Comal, Pemalang. Sebanyak sepuluh stasiun pengambilan sampel ditentukan secara acak sepanjang muara. Analisis logam dilakukan menggunakan metode aqua regia dan diukur dengan Flame Atomic Absorption Spectrophotometry (FAAS). Evaluasi kontaminasi dilakukan melalui perhitungan Contamination Factor (CF), Geoaccumulation Index (Igeo), Pollution Load Index (PLI), dan Ecological Risk Index (RI). Hasil menunjukkan bahwa konsentrasi Pb (0,10–0,23 mg/kg), As (0,38–0,59 mg/kg), Co (0,10–0,14 mg/kg), dan Cr (0,25–0,58 mg/kg) berada jauh di bawah nilai Interim Sediment Quality Guidelines (ISQG). Nilai CF<1, Igeo≤0, dan PLI<1 menandakan kontaminasi rendah, sedangkan RI (0,37–0,55) menunjukkan risiko ekologis sangat rendah. Secara spasial, akumulasi logam cenderung meningkat ke arah laut akibat transportasi dan deposisi sedimen. Hasil ini menunjukkan bahwa sedimen Estuari Sungai Comal belum tercemar signifikan, namun pemantauan berkala tetap diperlukan terhadap perubahan kualitas sedimen akibat dinamika pasang surut dan aktivitas antropogenik. Anthropogenic activities in the coastal area of Mojo Village, at the Comal River estuary, potentially increase heavy metal inputs into the aquatic environment. Estuarine sediments act as major sinks and reservoirs of heavy metals, reflecting the degree of contamination and ecological risk. This study aims to assess the pollution status and potential ecological risk of lead (Pb), arsenic (As), cobalt (Co), and chromium (Cr) in surface sediments of the Comal River estuary, Pemalang. Ten sampling stations were randomly selected along the estuary. Metal concentrations were determined using aqua regia digestion followed by Flame Atomic Absorption Spectrophotometry (FAAS). Contamination was evaluated using the Contamination Factor (CF), Geoaccumulation Index (Igeo), Pollution Load Index (PLI), and Ecological Risk Index (RI). The concentrations of Pb (0,10–0,23 mg/kg), As (0,38–0,59 mg/kg), Co (0,10–0,14 mg/kg), and Cr (0,25–0,58 mg/kg) were well below the Interim Sediment Quality Guidelines (ISQG). Values of CF<1, Igeo≤0, and PLI<1 indicated low contamination, while RI (0,37–0,55) suggested a very low ecological risk. Spatially, metal accumulation increased seaward, associated with sediment transport and deposition. Overall, the Comal River estuarine sediments remain unpolluted, though continuous monitoring is recommended due to tidal dynamics and ongoing anthropogenic pressures.

oai:ojs.ejournal.undip.ac.id:article/25209 2025-03-06T17:44:01Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/25209 2025-03-06T17:44:01Z Buletin Oseanografi Marina Vol 8, No 2 (2019): Buletin Oseanografi Marina; 61-66 Fitroh, Indah Syahiddah; Department of Oceanography, Faculty of Fisheries and Marine Sciences, Universitas Diponegoro Subardjo, Petrus; Department of Oceanography, Faculty of Fisheries and Marine Sciences, Universitas Diponegoro Maslukah, Lilik; Department of Oceanography, Faculty of Fisheries and Marine Sciences, Universitas Diponegoro 2019-10-04 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/25209 Timbal; Sedimen Dasar; Marunda; Jakarta Utara id Kegiatan industri di Perairan Muara Sungai Tiram, Marunda, Jakarta Utara, akan berdampak terhadap konsentrasi logam berat di Perairan. Sedimen merupakan tempat akumulasinya logam tersebut dan pada suatu saat akan dapat menjadi sumber bagi kolom perairan diatasnya. Tujuan penelitian ini adalah untuk mengetahui konsentrasi logam berat pada sedimen dasar dan mengetahui korelasinya terhadap ukuran butir serta dan bahan organik. Analisa logam berat diawali dengan proses destruksi menggunakan aquaregia dan supernatannya di baca nilai absorbasninya menggunakan Atomic Absorption Spectrophotometer (AAS). Untuk melihat hubungan parameter logam berat terhadap ukuran butir dan bahan organik, menngunakan analisis korelasi Pearson. Berdasarkan penelitian tersebut diperoleh nilai konsentrasi logam berat dengan kisaran 20,19–55,68 ppm. Konsentrasi logam berat memiliki korelasi positif terhadap fraksi silt dan clay.  Distribusi logam berat di lokasi penelitian berasosiasi kuat terhadap fraksi ukuran butir halus dan bahan organik, melalui proses adsorpsi. The waters of the Muara Sungai Tiram, Marunda, North Jakarta, are areas that are surrounded by very dense industrial activities. The existence of these activities has an impact on the concentration of heavy metals in basic sediments in these waters. The purpose of this study was to determine the concentration of heavy metals in basic sediments and determine the correlation between the concentration of heavy metals with grain size on the base sediment in the liquid and the correlation between the concentration of heavy metals with organic matter. Analysis of heavy metal concentrations was carried out using the acid destruction method, then the concentration was read using the Atomic Absorption Spectrophotometer (AAS), and processed into a heavy metal concentration map using Arcgis 10.3. Based on these studies the value of heavy metal concentrations obtained in the range of 20.19 - 55.681 ppm. Heavy metal concentrations have a positive correlation with the mud and organic matter fractions with r values of 0.68 and 0.10, respectively. The distribution of heavy metals in this study is strongly associated with the fine grain size fraction and organic matter, through the adsorption process

oai:ojs.ejournal.undip.ac.id:article/59350 2023-11-04T02:49:24Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/59350 2023-11-04T02:49:24Z Buletin Oseanografi Marina Vol 12, No 3 (2023): Buletin Oseanografi Marina; 465-472 Sumbodo, Yoshua Mario; Program Studi Bioteknologi, Departemen Biologi, Fakultas Sains dan Matematika, Universitas Diponegoro Dewi, Fiona Aqhila; Program Studi Bioteknologi, Departemen Biologi, Fakultas Sains dan Matematika, Universitas Diponegoro Kristiadi, Okti Hajeng; Program Studi Bioteknologi, Departemen Biologi, Fakultas Sains dan Matematika, Universitas Diponegoro Ayuningtyas, Annisa Nur; Program Studi Bioteknologi, Departemen Biologi, Fakultas Sains dan Matematika, Universitas Diponegoro Raihan, Heksa; Program Studi Bioteknologi, Departemen Biologi, Fakultas Sains dan Matematika, Universitas Diponegoro Zainuri, Muhammad; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Kusumaningrum, Hermin Pancasakti; Program Studi Bioteknologi, Departemen Biologi, Fakultas Sains dan Matematika, Universitas Diponegoro 2023-10-04 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/59350 isolation; characterization; lead; tolerance en Lead is a heavy metal contamination that is released into sea waters and cannot be decomposed so it accumulation and magnification along the food chain. Efforts to explore bacteria that have tolerance and have the potential to become lead reduction agents are a strategic step in remediating lead contamination. One mechanism for lead bioremediation by bioaccumulation is to utilize metallothionein protein which can potentially be obtained from isolates of green mussel associated bacteria. Bacterial isolates associated with green mussels were obtained by isolating the bacteria and testing the tolerance of the bacterial isolates using Luria Bertani media which was added with Pb(NO3)2 at a concentration of 100 ppm and its multiples to determine their tolerance to lead. The bacterial isolates obtained were characterized based on colony and cell morphology. The results of the lead resistance test carried out showed that 11 bacterial isolates were obtained and 3 bacterial isolates had tolerance to lead with a lead concentration of 400 ppm. Bacterial isolates that are tolerant to lead show changes in cell morphology to reduce the impact of exposure to lead which has a lethal effect, because the resulting decrease in cell surface area can reduce lead absorption.

oai:ojs.ejournal.undip.ac.id:article/31038 2021-02-01T08:06:16Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/31038 2021-02-01T08:06:16Z Buletin Oseanografi Marina Vol 9, No 2 (2020): Buletin Oseanografi Marina; 141-149 Halisah, Kharisma Ayu Zeina; Departemen Sumberdaya Akuatik, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Solichin, Anhar; Departemen Sumberdaya Akuatik, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Sabdaningsih, Aninditia; Departemen Sumberdaya Akuatik, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2020-10-15 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/31038 Terumbu Karang; Kelimpahan Juvenil; Lapisan Biofilm id Pulau Kemujan merupakan salah satu pulau terbesar di Kepulauan Karimunjawa yang memiliki kerapatan terumbu karang yang beragam. Ekosistem terumbu karang memiliki peranan penting namun juga merupakan ekosistem yang rentan akan terjadinya kerusakan. Akibat penurunan kondisi kualitas lingkungan dapat memungkinkan untuk memberikan pengaruh terhadap habitat rekruitmen juvenil. Tujuan penelitian ini adalah untuk mengetahui kelimpahan juvenil karang berdasarkan perbedaan kedalaman, kesesuaian faktor fisika, kimia dan biologi yang mempengaruhi proses penempelan juvenil karang, kondisi terumbu karang berdasarkan perbedaan kedalaman serta hubungan antara kelimpahan juvenil karang dengan tutupan karang dan bahan organik di perairan Pulau Kemujan. Metode yang digunakan pada penelitian ini yaitu metode analisis deskriptif, sedangkan metode yang digunakan untuk pengumpulan data yaitu Line Intercept Transect (LIT) sepanjang 50 meter. Hasil yang diperoleh dari penelitian ini yaitu kelimpahan juvenil karang tertinggi berada di daerah reef flat sisi barat perairan Pulau Kemujan sebanyak 47 koloni, sedangkan kelimpahan terendah berada di daerah reef slope sisi timur sebanyak 7 koloni. Parameter perairan fisika, kimia dan biologi pada penelitian masih berada pada batas kisaran nilai optimum. Kondisi tutupan karang hidup pada sisi barat perairan Pulau Kemujan berkisar dari 46,60% hingga 53,62% sedangkan pada sisi timur yaitu berkisar dari 44,10% hingga 71,38%. Kelimpahan juvenil karang dengan tutupan karang hidup, pecahan karang serta bahan organik menunjukkan pola hubungan yang berbanding terbalik sedangkan dengan tutupan karang mati berbanding lurus. Berdasarkan peneltian ini dapat diketahui bahwa juvenil karang memiliki kecenderungan ditemukan lebih banyak pada tutupan karang mati dalam kondisi lingkungan yang optimum.   Kemujan Island is one of the largest islands in the Karimunjawa which has a varying density of coral reefs. The coral reef ecosystem has an important role however it is vulnerable to damage. The purpose of this study is to determine the decline of coral juvenile based on the depth difference, the compatibility of chemical, physical and biological factors that enhance the resilience of coral juvenile, and the correlation of coral juvenile with the coral covers and the organic material in the waters of Kemujan Island. The method used in this research is a descriptive analysis method. The method used in data collection is Line Intercept Transect (LIT) 50 meter .  The results from this study obtained that the highest abundance of juvenile corals was in the reef flat area of the west side from the waters of the Kemujan Island as many as 47 colonies while the lowest abundance was in the reef slope area of the eastern side as many as 7 colonies. The physical, chemical, and biological water parameters in the study were still in the optimum range. The condition of live coral cover on the west side of Kemujan Island waters ranged from 46.60% to 53.62% while on the east side it ranged from 44.10% to 71.38%. The abundance of juveniles coral with live coral cover, coral fragments, and organic matter showed inversed pattern relationship whereas with dead coral cover was directly proportional. Based on this study it can be known that corals juvenile have a tendency to be found more at dead coral in optimum environmental conditions.

oai:ojs.ejournal.undip.ac.id:article/58566 2024-07-04T18:54:21Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/58566 2024-07-04T18:54:21Z Buletin Oseanografi Marina Vol 13, No 2 (2024): Buletin Oseanografi Marina; 219-229 Ranandya, Alvanza Qurandiva; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Jenderal Soedirman Putri, Niken Mayuni; PT Tirta Samudra Bali Septiandi, Adrian Rahman; PT Tirta Samudra Bali Riyanti, .; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Jenderal Soedirman 2024-06-05 22:58:07 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/58566 Coral transplantation; Acropora millepora; microfragmentation id Kerusakan ekosistem terumbu karang di Indonesia mencapai 43%, salah satu penyebabnya adalah eksploitasi karang untuk diperdagangkan menjadi karang hias. Salah satu karang hias yang diperdagangkan yaitu karang dari jenis Acropora millepora. Oleh karena itu, budidaya karang hias sangat dibutuhkan untuk dapat mengurangi pengambilan karang berlebihan di alam. Budidaya karang dapat dilakukan dengan transplantasi karang menggunakan metode microfragmentation pada budidaya karang secara ex-situ yang terkontrol. Penggunaan metode microfragmentation dilakukan karena dapat mempengaruhi kecepatan pertumbuhan karang. Penelitian ini bertujuan untuk mengetahui laju pertumbuhan dan tingkat kelangsungan hidup microfragment A. millepora hasil transplantasi dengan metode microfragmentation pada kondisi terkontrol pada budidaya karang secara ex-situ. Pengamatan dan pengambilan data dilakukan dalam waktu 5 bulan, dan pengukuran laju pertumbuhan microfragment A. millepora menggunakan software ImageJ. Hasil penelitian menunjukkan rata-rata laju pertumbuhan microfragment A. millepora sebesar 0.1 cm2/bulan dengan pertambahan luasan area selama 5 bulan sebesar 1.35 cm2. Tingkat kelangsungan hidup microfragment A. millepora yang di transplantasi pada budidaya karang ex-situ pada kondisi terkontrol mencapai 100%. Budidaya karang ex-situ dengan sistem terkontrol sangat baik digunakan untuk melakukan transplantasi karang karena kondisi lingkungan pada budidaya ex-situ lebih stabil dibandingkan transplantasi karang pada budidaya in-situ. Oleh karena itu, dapat diartikan transplantasi karang A. millepora dengan metode microfragmentation dengan kondisi terkontrol pada budidaya ex-situ dapat dikatakan berhasil    The damage of coral reef ecosytems in Indonesia reached 43%, one of the causes is the exploitation of corals to be traded as ornamental coral. Acropora millepora is one of the corals commonly traded as ornamental corals. Hence, ornamental coral farming is needed to reduce corals harvesting in the wild. The cultivation can be done by coral transplantation using microfragmentation method in ex-situ coral nursery. Microfragmentation was used due to its ability to accelerate the growth rate of coral microfragment. This study aimed to observe the growth rate and survival rate of A. millepora microfragments transplanted with microfragmentation method under controlled condition at ex-situ coral nursery. Observation and data collection were conducted over 5 months, and measuring the growth rate of A. millepora microfragments using ImageJ software. The results of this study exhibited that the average growth rate of A. millepora microfragments was 0.1 cm2/month with a 5-months increase in area measured at 1.35 cm2. The survival rate of A. millepora microfragments transplanted at ex-situ coral nursery reached 100%. Ex-situ coral nursery under controlled condition is ideal for coral transplantation due to the environment in ex-situ nursery is more stable than in-situ nursery. Thus, it can be concluded that the transplantation of A. millepora using microfragmentation method under controlled condition at ex-situ coral nursery was succeeded.

oai:ojs.ejournal.undip.ac.id:article/11214 2020-04-17T12:01:18Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/11214 2020-04-17T12:01:18Z Buletin Oseanografi Marina Vol 3, No 1 (2014): Buletin Oseanografi Marina; 20-24 Endrawati, Hadi; Fakultas Perikanan dan Ilmu Kelautan UNDIP Tri Nuraini, Ria Azizah; Fakultas Perikanan dan Ilmu Kelautan UNDIP Suwartimah, Ken; Fakultas Perikanan dan Ilmu Kelautan UNDIP 2014-01-03 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/11214 en Perairan Desa Mangunharjo Kecamatan Tugu, Kota Semarang merupakan kawasan pemukiman, aktivitas warga, dan terdapat pula pabrik–pabrik sehingga limbah dari semua kegiatan tersebut akan dibuang ke perairan. Hal tersebut akan mempengaruhi kualitas perairan kehidupan dari zooplankton. Untuk itu perlu dilakukan penelitian mengenai sebaran horisotal untuk mengelahui kelimpahan, dan keanekaragaman zooplankton. Metode penelitian yang digunakan adalah purposive sampling metodh. Berdasarkan hasil penelitian diketahui kelimpahan zooplankton ditemukan sebanyak 39 genera pada saat pasang dan 43 genera pada saat surut dengan 8 fila yaitu Filum Arthropoda; Filum Chaetognatha; Filum Coelenterata; Filum Protozoa; Filum Chordata; Filum Ctenophora; Filum Moluska; Filum Polychaeta. Kelimpahan zooplankton tertinggi ditemukan pada stasiun 3 baik pada saat pasang maupun surut yang berkisar 243.08-300.96  ind L-1. Jenis zooplankton yang mendominasi berasal dari filum Protozoa genera Tintinnopsis. Kelimpahan zooplakton terendah terdapat pada stasiun 1 saat pasang sebesar 146.03 ind L-1 dan 145.14 ind L-1saat surut pada stasiun 2. Indeks keanekaragaman baik pada saat pasang maupun surut pada semua stasiun menunjukkan tingkat keanekaragaman yang rendah dengan nilai < 2. Begitu pula indeks dominansi pada semua stasiun menunjukkan tingkat dominansi sedang. Indeks keseragaman pada stasiun1 baik pada saat pasang dan surut menunjukkan keseragaman jenis sedang   Kata Kunci: Struktur Komunitas, Zooplankton, Mangunharjo, .  

oai:ojs.ejournal.undip.ac.id:article/27267 2021-09-19T19:04:11Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/27267 2021-09-19T19:04:11Z Buletin Oseanografi Marina Vol 10, No 3 (2021): Buletin Oseanografi Marina; 277-282 Putri, Wike Ayu Eka; Jurusan Ilmu Kelautan, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Sriwijaya Purwiyanto, Anna Ida Sunaryo; Jurusan Ilmu Kelautan, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Sriwijaya Agustriani, Fitri; Jurusan Ilmu Kelautan, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Sriwijaya Fauziyah, Fauziyah; Jurusan Ilmu Kelautan, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Sriwijaya Maslukah, Lilik; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Suteja, Yulianto; Program Studi Ilmu Kelautan, Fakultas Kelautan dan Perikanan, Universitas Udayana 2021-09-20 02:02:12 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/27267 PAH; Polisiklik aromatik hidrokarbon; Pulau Payung; Muara Sungai Musi Universitas Sriwijaya id Muara Sungai Musi dan Pulau Payung adalah kawasan bagian hilir Sungai Musi yang menerima banyak masukan limbah dan bahan pencemar akibat aktifitas di sepanjang aliran sungai. Polisiklik aromatik hidrokarbon (PAH) adalah salah satu komponen pencemar organik yang keberadaannya mengancam kehidupan biota perairan. Penelitian ini bertujuan untuk mengidentifikasi keberadaan senyawa PAH pada sampel air laut dan sedimen yang berasal dari Muara Sungai Musi dan sekitar Pulau Payung. Pengambilan sampel dilakukan pada bulan Juli 2019. Contoh air laut diambil dengan water sampler pada 5 stasiun penelitian dan contoh sedimen diambil menggunakan ekman grab pada 8 stasiun penelitian. Kadar PAH dianalisa dengan High Performance Liquid Chromatography (HPLC), cara kerja merujuk pada APHA (2017) 6440 B divalidasi. Hasil penelitian menunjukkan bahwa kandungan PAH total dalam sampel air Muara Sungai Musi dan sekitar Pulau Payung berkisar antara batas minimum deteksi alat (<0,004)-0,0,62 ppb. Adapun kandungan PAH total dalam sampel sedimen berkisar antara 11,92-558,41 ppb. Secara keseluruhan terlihat bahwa kandungan PAH dalam sampel air dan sedimen yang berasal dari Sungai Musi dan sekitar Pulau Payung masih aman bagi organisme. Musi River Estuary and Payung Island are the downstream areas of the Musi River which receive a lot of inputs of waste and pollutants due to activities along the river flow. Polycyclic aromatic hydrocarbons (PAHs) is one component of organic pollutants which dangerous for the aquatic organism. This study aims to identify the PAHs compounds in seawater and sediment samples from the Musi River Estuary and around Payung Island. Sampling was carried out in July 2019. Seawater samples were taken with a water sampler and sediment samples were taken using ekman grab at 7 research stations. PAH levels were analyzed by High Performance Liquid Chromatography (HPLC), the method refers to APHA (2017) 6440 B. The results showed that the PAH content in the Muara River Musi water samples and around Payung Island ranged from under detection limit(<0,004)-0.62 ppb. The PAH content in sediment samples ranged from 11.92-558.41 ppb. Overall PAHs content in water and sediment samples from the Musi River and around Payung Island are still good for the aquatic organism.

oai:ojs.ejournal.undip.ac.id:article/61672 2026-02-11T04:53:31Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/61672 2026-02-11T04:53:31Z Buletin Oseanografi Marina Vol 14, No 1 (2025): Buletin Oseanografi Marina; 37-48 Melmambessy, Edy H.P.; Program Doktor Manajemen Sumber Daya Perairan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Jurusan Manajemen Sumberdaya Perairan, Fakultas Pertanian, Universitas Musamus Saputra, Suradi Wijaya; Departemen Manajemen Akuatik, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Hartoko, Agus; Departemen Manajemen Akuatik, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Mudzakir, Abdul Kohar; Departemen Perikanan Tangkap, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2025-02-20 05:07:25 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/61672 Selektivitas alat tangkap; Merauke id Tingkat pemanfaatan (E) udang Penaeus merguiensis di perairan pantai Laut Arafura Merauke Provinsi Papua Selatan dalam kategori over-fishing (E=0,76/tahun untuk jantan dan betina E= 0,59/tahun). Mortalitas karena penangkapan (F) lebih besar dari mortalitas alami (M), menunjukan tekanan penangkapan tinggi.  Tujuan penelitian menganalisis penentuan ukuran mata jaring untuk keberlanjutan penangkapan udang P. merguiensis di perairan pantai Laut Arafura Merauke Provinsi Papua Selatan. Metode survei digunakan dalam penelitian, dengan teknik pengambilan sampel: sistimatik sampling.  Waktu pengumpulan data: Agustus 2022 - Juli 2023 pada tiga stasiun penelitian.  Analisis data utamanya penentuan ukuran mata jaring. Ukuran mata jaring untuk keberlanjutan udang P. merguiensis di stasiun A Distrik Naukenjerai = 50,80 - 98,21 mm; stasiun B Distrik Merauke = 42,68 mm; dan stasiun C Distrik Semangga = 50,05 mm. Penentuan ukuran mata jaring ini telah mempertimbangkan ukuran pertama matang gonad udang P. merguiensis pada ketiga stasiun penelitian: A Distrik Naukenjerai = 42,20 mmCL, B Distrik Merauke = 40,20 mmCL, dan C = 42,00 mmCL. Pengaturan ini dimaksudkan agar udang yang tertangkap secara ekonomi menguntungkan, dan kelestarian sumber daya udang dapat dijaga. Hasil penelitian dapat dijadikan pertimbangan kebijakan penentuan ukuran mata jaring trammel net dan pukat tarik dalam penangkapan udang secara berkelanjutan.

oai:ojs.ejournal.undip.ac.id:article/15742 2020-04-17T12:03:49Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/15742 2020-04-17T12:03:49Z Buletin Oseanografi Marina Vol 6, No 1 (2017): Buletin Oseanografi Marina; 46-52 Hidayati, Jelita Rahma; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Ridlo, Ali; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Pramesti, Rini; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2017-08-28 16:35:24 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/15742 Padina sp.; Antioksidan; DPPH id Antioksidan merupakan senyawa yang dapat menghambat atau mencegah reaksi oksidasi. Antioksidan sintetik kurang aman bagi kesehatan karena bersifat karsinogen, sehingga diperlukan sumber antioksidan alami seperti Padina sp. yang mengandung senyawa bioaktif seperti fenolat, klorofil a, karotenoid dan β-karoten. Padina sp. diambil dari Perairan Bandengan Jepara dan dikeringkan dengan Solar Tunnel Dryer (STD) selama 3 hari. Sampel dimaserasi secara bertingkat dengan pelarut n-heksana, etil asetat dan metanol lalu diuapkan dengan rotary evaporator. Aktivitas antioksidan ditentukan dengan metode DPPH (1,1-diphenyl-2-picrylhidrazyl) sebagai radikal bebas. Nilai IC50digunakan untuk mengetahui aktivitas antioksidan pada sampel yang diinkubasi selama 30 menit dan diukur nilai absorbansinya pada panjang gelombang 514 nm. Kandungan total fenolat diuji menggunakan larutan Folin-Ciocalteu dengan asam galat sebagai standar yang diukur pada panjang gelombang 725 nm. Kandungan klorofil a diukur pada panjang gelombang 663 nm dan 645 nm sedangkan karotenoid diukur pada panjang gelombang 480 nm. Hasil penelitian menunjukkan nilai IC50  terbaik dicapai ekstrak etil asetat yaitu 137,02 ppm, diikuti ekstrak n-heksana 1234,41 ppm dan ekstrak metanol 1554,45 ppm. Kandungan total fenolat tertinggi dicapai pada ekstrak etil asetat yaitu 12,09 mg GAE/g sampel, diikuti ekstrak n-heksana 9,32 mg GAE/g sampel dan ekstrak metanol 0,22 mg GAE/g sampel. Kandungan klorofil a tertinggi dicapai ekstrak etil asetat yaitu 2,67 mg/g sampel , diikuti ekstrak metanol 0,39 mg/g sampel dan ekstrak n-heksana 0,30 mg /g sampel. sampel). Kandungan karotenoid tertinggi dicapai ekstrak etil asetat yaitu 5,37 µ mol/g sampel, diikuti ekstrak n-heksana 1,85 µ mol/g sampel dan ekstrak metanol 0,53 µ mol/g sampel. Ekstrak etil asetat memiliki aktivitas antioksidan kategori sedang dan ekstrak metanol serta n-heksana memiliki aktivitas antioksidan kategori sangat lemah. Antioxidant are the compounds capable to inhibit and prevent oxidation reaction. Synthetic antioxidant less safe for health because it is a carsinogen, so required source of natural antioxidant as Padina sp. that contains bioactive compounds as fenolat, chlorophyll a, carotenoid and β-caroten. Padina sp was taken from Bandengan water Jepara and dried with Solar Tunnel Dryer (STD) during 3 days. Macerated sample were stratified with n-heksana, ethyl acetate and methanol then evaporated with a rotary evaporator. The antioxidant activity was determined using a DPPH solution (1,1-diphenyl-2-picrylhidrazyl) as free radicals. IC50 value used to determine the antioxidant activity of sample were incubated for 30 minutes and measured at wavelength 514 nm. Total phenolic content tested by the Folin-Ciocalteu solution with gallic acid as standard and measured at a wavelength of 725 nm, while the chlorophylls a content were measured at a wavelength of 663 nm and 645 nm and carotenoids were measured at a wavelength of 480 nm. The results showed best IC50 is achieved by ethyl acetat extract 137,02 ppm, followed by n-heksana extract 1234,41 ppm and methanol extract 1554,45 ppm.The highest total phenolic content is achieved by ethyl acetat extract 12,09 mg GAE/g sample, followed by n-heksana extract 9,32 mg GAE/g sample and methanol extract 0,22 mg GAE/g sample. The highest chlorophyll a content is achieved by ethyl acetat extract 2,67 mg/g sample, followed by methanol extract 0,39 mg/g sample and n-heksana extract 0,30 mg/g sample. The highest carotenoids content is achieved by ethyl acetat extract 5,37 μmol/g sample, followed by n-heksana extract 1,85 μmol/g sample and  methanol extract 0,53 μmol/g sample. Eethyl acetate extract categorized as medium antioxidant activity and methanol and n-heksana extracts categorized as very weak antioxidant activity.

oai:ojs.ejournal.undip.ac.id:article/42348 2023-01-25T06:05:53Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/42348 2023-01-25T06:05:53Z Buletin Oseanografi Marina Vol 11, No 3 (2022): Buletin Oseanografi Marina; 263-270 Nugroho, Gandang Herdananto; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Ario, Raden; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Pramesti, Rini; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2022-10-01 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/42348 Lamun; Struktur Komunitas; Indeks Vegetasi id Ekosistem lamun merupakan salah satu ekosistem bahari yang produktif sebagai habitat, tempat pemijahan dan feeding ground. Penelitian ini bertujuan mendapatkan kondisi struktur komunitas lamun yang tersebar di perairan Mrican Pulau Kemujan, Karimunjawa. Parameter yang dikaji berupa komposisi jenis, indeks ekologi dan parameter perairan. Luas tutupan lamun didapatkan melalui hasil foto udara yang diolah dengan analisa indeks vegetasi. Penelitian dilakukan dengan metode deskriptif eksploratif dengan penentuan titik lokasi meggunakan metode purposive sampling. Lokasi penelitian dibagi menjadi 3 titik berdasarkan daerah ekosistem lamun dan area wisata. Metode pengambilan sampel lamun dengan  metode line transeck dengan alat bantu transeck kuadrat. Pengambilan foto udara menggunakan wahana drone dengan aplikasi pix4d. Komposisi jenis spesies lamun yang ditemukan sebanyak 4 spesies, yaitu Enhalus acoroides, Thalassia hemprichii, Cymodocea rotundata, dan Halodule uninervis. Pola sebaran lamun tiap jenis mengelompok sedangkan lamun jenis E. Acoroides merata pada stasiun 3. Nilai tutupan lamun tertinggi terdapat pada stasiun 2 (21,3%); dengan rata – rata penutupan 17,02%. Kerapatan tertinggi terdapat di stasiun 1 spesies E. Acoroides. Keanekaragaman lamun menghasilkan nilai rendah dan kategori sedang. Indeks keseragaman kategori sedang terdapat pada stasiun 1 sedangkan kategori tinggai pada stasiun 2 dan 3. Indeks dominansi dari ke-3 stasiun menunjukkan tidak adanya dominasi yang terjadi di setiap stasiun. Estimasi tutupan lamun dengan foto udara dengan areal studi 4,68 ha adalah seluas 16.210 m², sehingga estimasi tutupan lamun di perairan Pantai Mrican, Taman Nasional Karimunjawa sebesar 35%. Seagrass ecosystem is one of the productive marine ecosystems as a habitat, spawning ground and feeding ground. This study aims to obtain the structural conditions of seagrass communities scattered in the waters of Mrican Kemujan Island, Karimunjawa. The parameters studied were species composition, ecological index and water parameters. The area of seagrass cover was obtained through the results of aerial photographs which were processed by analysis of the vegetation index. The research was conducted using an exploratory descriptive method with the determination of the location points using the purposive sampling method. The research location is divided into 3 points based on the seagrass ecosystem area and tourist area. Seagrass sampling method refers to the LIPI method with a quadrant line transect tool. Taking aerial photos using drone rides with the pix4d application. There were 4 species of seagrass species composition, namely Enhalus acoroides, Thalassia hemprichii, Cymodocea rotundata, and Halodule uninervis. The distribution pattern of each type of seagrass is clustered, while the seagrass species of E. acoroides are evenly distributed at station 3. The highest seagrass cover value is found at station 2 (21.3%); with an average closing of 17.02%. The highest density was found at station 1 species of E. acoroides. Seagrass diversity resulted in low scores and medium categories. The medium category uniformity index was found at station 1 while the high category was at stations 2 and 3. The dominance index from the 3 stations showed that there was no dominance that occurred at each station. The estimated seagrass cover using aerial photography with a study area of 4.68 ha is 16,210 m², so that the estimated seagrass cover in the waters of Mrican Beach, Karimunjawa National Park is 35%.

oai:ojs.ejournal.undip.ac.id:article/6911 2014-05-20T02:43:39Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6911 2014-05-20T02:43:39Z Buletin Oseanografi Marina Vol 1, No 5 (2012): Buletin Oseanografi Marina; 15-19 Irwani, Irwani; Jurusan Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, UNDIP Suryono, Chrisna Adhi; Jurusan Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, UNDIP 2012-10-10 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6911 en Lahan mangrove mempunyai potensi dikembangkan untuk usaha penggemukan kepiting tanpa merusak, yaitu melalui konsep silvofishery.  Tujuan dari penelitian ini adalah menjajaki pemeliharan kepiting bakau Scylla serrata didaerah mangrove dan mencari kepadatan optimal. Metoda yang digunakan adalah eksperimen dengan rancangan acak kelompok.  Perlakuan yang diterapkan adalah kepadatan yang berbeda (4 ekor/m2, 6 ekor/m2 dan 8 ekor/m2) dengan kelompok (daerah mangrove dan non-mangrove) dan dengan ulangan 3 kali.  Data yang diperoleh berupa penambahan berat badan dianalisa dengan balanced designs anova. Hasil yang didapat menunjukan kepiting bakau yang dipelihara didaerah mangrove memiliki penambahan berat yang lebih besar bila dibandingkan dengan yang dipelihara diluar daerah mangrove.  Kepiting bakau yang dipelihara didaerah mangrove dengan kepadatan 4 ekor/m2 pertambahan berat rata rata 81,7 gr/bulan; dan kepadatan 6 ekor/m2 bertambah rata rata 77,8 gr/bulan, sedang kepadatan 8 ekor/m2 73,9 gr/bulan.  Hal tersebut sangat berbeda dengan kepiting yang dipelihara pada daerah yang tidak bermangrove dimana untuk kepadatan 4 ekor/m2 rata rata hanya bertambah 68,75 gr/bulan dan yang berkepadatan kepadatan 6 ekor/m2 bertambah rata rata 39,1 gr/bulan sedangkan yang berkepadatan 8 ekor/m2 32,2 gr/bulan.  Interaksi antara kepadatan dan lokasi (bermangrove dan bukan) memberikan pengaruh yang sangat nyata pada penambahan berat kepiting bakau (p<0,001).   Kata kunci : Kepiting bakau, pertumbuhan dan mangrove

oai:ojs.ejournal.undip.ac.id:article/69965 2025-10-18T08:20:06Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/69965 2025-10-18T08:20:06Z Buletin Oseanografi Marina Vol 14, No 3 (2025): Buletin Oseanografi Marina; 457-466 Pardede, Meri Kristina; Departemen Ilmu Kelautan, Fakultas Pertanian, Universitas Bengkulu Bakhtiar, Deddy; Departemen Ilmu Kelautan, Fakultas Pertanian, Universitas Bengkulu Jarulis, Jarulis; Program Studi Biologi Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Bengkulu Sugara, Ayub; Departemen Ilmu Kelautan, Fakultas Pertanian, Universitas Bengkulu Nirawandi, Iwan; Direktorat Pengendalian Pencemaran dan Kerusakan Pesisir dan Laut, Kementerian Lingkungan Hidup dan Kehutanan Margono, Setio; Direktorat Pengendalian Pencemaran dan Kerusakan Pesisir dan Laut, Kementerian Lingkungan Hidup dan Kehutanan 2025-10-18 15:20:04 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/69965 Coral recover; El Nino, survival rate; transplantation id Pulau Tikus adalah sebuah pulau kecil di Samudera Hindia yang berjarak sekitar 9 km dari Kota Bengkulu. Kondisi tutupan karang hidup yang rendah dan pemulihan kondisi terumbu karang sangat lambat, sehingga intervensi rehabilitasi melalui transplantasi karang sangat diperlukan untuk mengembalikan fungsi ekosistem terumbu karang yang telah rusak. Transplantasi karang yang digunakan adalah metode rak besi tipe spider web, cara ini dianggap sebagai salah satu teknik rehabilitasi karang yang paling berhasil. Salah satu jenis life form karang yang banyak ditemukan di Pulau Tikus adalah life form karang Heliopora, sehingga life form karang ini dijadikan objek untuk transplantasi karang. Tujuan dari penelitian ini adalah untuk menganalisis pertumbuhan dan kelangsungan hidup fragmen Heliopora yang ditransplantasikan pada substrat tipe spider web di perairan Pulau Tikus. Metode yang digunakan dalam penelitian ini adalah metode observasi dengan mengamati pertumbuhan fragmen karang pada 3 rangka web spider setiap 2 bulan selama 6 bulan serta menghitung jumlah fragmen karang yang mati selama pemeliharaan. Hasil penelitian, didapatkan bahwa nilai rata-rata pertumbuhan tinggi fragmen Heliopora selama 6 bulan pengamatan adalah 1,3 mm/bulan, sedangkan rata-rata pertumbuhan untuk lebar fragmen Heliopora adalah 1,75 mm/bulan. Transplantasi fragmen Heliopora pada rangka web spider di perairan Pulau Tikus, Kota Bengkulu dikatakan berhasil dengan tingkat kelangsungan hidup sekitar 50-75%. Tingkat kelangsungan hidup yang rendah diduga karena adanya aktivitas antropologi nelayan penangkapan ikan.

oai:ojs.ejournal.undip.ac.id:article/22453 2020-04-25T06:17:23Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/22453 2020-04-25T06:17:23Z Buletin Oseanografi Marina Vol 8, No 1 (2019): Buletin Oseanografi Marina; 37-43 Hutama, Haryo Farras Raditya; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Hartati, Retno; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Djunaedi, Ali; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2019-04-19 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/22453 Struktur Komunitas; Gastropoda; Mangrove id Kerusakan hutan mangrove yang terjadi karena adanya aktivitas manusia cukup mengkhawatirkan dan berpengaruh terhadap kelangsungan hidup biota yang hidup didalamnya, salah satunya adalah Gastropoda. Penelitian ini dilakukan untuk mengetahui komposisi jenis makrozoobenthos gastropoda  dan menganalisa struktur komunitasnya. Pengambilan sampel dilaksanakan pada bulan Maret 2015 di 4 lokasi yakni Mangunharjo, Mangkang Wetan, Pantai Maron dan Trimulyo, Semarang. Penentuan lokasi sampling dengan metode purposive sampling method terbagi dari kelebatan mangrove lebat, sedang dan jarang pada setiap lokasi penelitian dengan pertimbangan pengaruh aliran sungai terhadap parameter disetiap stasiunnya.Klasifikasi kelebatan mangrove berdasarkan data sekunder kerapatan mangrove Pesisir Utara Semarang 2015. Pengambilan sampel gastropoda menggunakan metode kualitatif dengan transek 5m x 5m dan 1m x 1m dengan jumlah stasiun sebanyak 8 dan 3 kali pengulangan pada setiap stasiunnya. Hasil penelitian ditemukan 8 jenis spesies yang terdiri dari 4 famili yang berbeda.Famili Potamididae paling banyak ditemukan dengan jumlah 4 spesies. Ditemukan satu spesies Famili Neriitidae yakni Nerita sp. serta satu spesies Famili Ellobiidae yakni Cassidula sp.. Kelimpahan tertinggi terdapat pada Stasiun MR1 (25.667 ind./75m2) dan terendah distasiun MW3 (0.107 ind./75m2). Nilai Indeks Keanekaragaman masuk dalam kategori sedang, sedangkan nilai indeks keseragaman dalam kategori tinggi.Dalam penelitian ini menemukan spesies yang mendominasi pada 2 stasiun yaitu Stasiun MW1 dan MR1. The damage of the mangrove ecosystem which occur due to human activity is quite alarming and effect on the survival of biota that lived in it, one which is Gastropods. This research was conducted to find out the composition of macrozoobenthos gastropods and analyze its community structure. Sampling did on March 2015 at 4 locations, i.e., Mangunharjo, Mangkang Wetan, Maron and Trimulyo, Semarang. This study was conducted to determine and identify the community structure of gastropod macrozoobenthos in mangrove vegetation on the coast of Semarang The determination of sampling location use purposive sampling method that divide the dense mangrove luxuriance, moderate and rarely at location research. The dense mangrove classification based on secondary data from the landsat image of 8 and the data density of mangrove North Coastal Semarang 2015. Sampling use qualitative method with 5 m x 5 m transects and 12 stations with three-time repetitions for each stations. The results found gastropods 8 types of species comprising in 4 different families. Potamididae family is the most dominant where found 4 species. One species of Neriitidae family is found which Nerita sp. and one species of the Ellobidae family is also found, which Cassidula sp.. The highest abundance was found on Station MR1 (25.667 ind./75m2) and the lowest in station MW3 (0.107 ind./75m2). The value of the Diversity Index can be category as average while the Equitability Index value is high. In this study, found there is 2 dominance species on the whole research station, one at MW1 and the other at MR1.

oai:ojs.ejournal.undip.ac.id:article/49511 2023-06-20T04:50:15Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/49511 2023-06-20T04:50:15Z Buletin Oseanografi Marina Vol 12, No 2 (2023): Buletin Oseanografi Marina; 231-242 Pitaloka, Diah; Program Studi Ilmu Kelautan, Jurusan Kelautan dan Perikanan, Fakultas Pertanian, Universitas Trunojoyo Madura Jayanthi, Onie Wiwid; Program Studi Ilmu Kelautan, Jurusan Kelautan dan Perikanan, Fakultas Pertanian, Universitas Trunojoyo Madura Kartika, Ary Giri Dwi; Program Studi Ilmu Kelautan, Jurusan Kelautan dan Perikanan, Fakultas Pertanian, Universitas Trunojoyo Madura Wicaksono, Ashari; Program Studi Ilmu Kelautan, Jurusan Kelautan dan Perikanan, Fakultas Pertanian, Universitas Trunojoyo Madura Syaifullah, Muh.; Program Studi Ilmu Kelautan, Jurusan Kelautan dan Perikanan, Fakultas Pertanian, Universitas Trunojoyo Madura Fikriah, Irsyadatul; Program Studi Ilmu Kelautan, Jurusan Kelautan dan Perikanan, Fakultas Pertanian, Universitas Trunojoyo Madura 2023-06-20 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/49511 Program R; Arus; ADCP; Pademawu id Penggunaan bahasa pemrograman merupakan salah satu dari penerapan kemudahan teknologi, melalui pemrosesan, pengolah, serta analisis data ,berupa output data yang jelas dan akurat secara cepat dan relevan. Bahasa program R dinilai cukup baik sebagai alat simulasi model, baik melalui kemampuan kalkulasi dan manipulasi data, maupun pada kemampuan peragaan grafik dan visualisasi data. Tujuan dari penelitian ini ialah mengetahui tahapan pengolahan data arus menggunakan bahasa program R. Keunggulan bahasa pemrograman tersebut ialah bersifat open source dan dapat digunakan untuk mengolah big data. Pengambilan data arus menggunakan instrumen Acoustic Doppler Current Profiler (ADCP) dilakukan secara insitu menggunakan metode eulerian. Perekaman data dilakukan selama 3 hari di kawasan Perairan Pademawu, Pamekasan, Madura. Data diolah menggunakan bahasa pemrograman R versi 4.1.2. dengan memanfaatkan software R-Studio.  Pengolahan data tersebut akan menghasilkan grafik dan stick plot arah dan kecepatan komponen arus U (Timur-Barat) dan V (Selatan-Utara). Visualisasi tersebut menginterpretasikan karakteristik arus di lokasi penelitian. Kesimpulan dari penelitian ini ialah tahapan pengolahan data arus menggunakan bahasa program R diantaranya yaitu pre-pengolahan data, pengolahan data, dan post-pengolahan data. Pada tahapan post-processing data, dihasilkan 442 records dan 21 variable dataset sebagai bahan visualisasi stick plot dan grafik garis U-V yang dapat menginterpretasikan karakteristik arus laut di kawasan penelitian.   Using a programming language is one of the applications of technological convenience, through data processing, processing, and analysis, in the form of clear and accurate data output that is fast and relevant. The R programming language is considered quite good as a model simulation tool, both through its calculation and data manipulation capabilities, as well as in its graphical display capabilities and data visualization. The aim of this research is to know the stages of data processing using the R programming language. The advantage of this programming language is that it is open-source and can be used to process big data. Current data collection using the Acoustic Doppler Current Profiler (ADCP) instrument was carried out in situ using the Eulerian method. Data recording was carried out for 3 days in the Pademawu Waters, Pamekasan, Madura. Data is processed using the R programming language version 4.1.2. it is using R-Studio software. Processing the data will produce graphs and stick plots of the direction and velocity of the U (East-West) and V (South-North) current components. The visualization interprets the characteristics of the currents at the research location. This study concludes that the stages of processing data flow using the R programming language include data pre-processing, data processing, and post-data processing. At the data post-processing stage, 442 records and 21 dataset variables were produced as visualization materials for stick plots and U - V line graphs that can interpret the characteristics of ocean currents in the research area.

oai:ojs.ejournal.undip.ac.id:article/6947 2014-05-22T07:44:20Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6947 2014-05-22T07:44:20Z Buletin Oseanografi Marina Vol 2, No 3 (2013): Buletin Oseanografi Marina; 22-28 Yunus, Burhan Habibi; Mahasiswa Program Studi Ilmu Kelautan Jurusan Ilmu Kelautan Fakultas Perikanan dan Imu Kelautan Universitas Diponegoro Wijayanti, Diah Permata; Staf Pengajar Program Studi Ilmu Kelautan Jurusan Ilmu Kelautan Fakultas Perikanan dan Imu Kelautan Universitas Diponegoro Sabdono, Agus; Staf Pengajar Program Studi Ilmu Kelautan Jurusan Ilmu Kelautan Fakultas Perikanan dan Imu Kelautan Universitas Diponegoro 2013-07-22 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6947 en Terumbu karang merupakan ekosistem perairan yang khas terdapat di daerah tropis yang memiliki produktivitas dan keanekaragaman biota yang tinggi. Ekosistem terumbu karang memiliki fungsi yang penting bagi kehidupan ekologi pantai dan pesisir, terutama sebagai sumber nutrien bagi habitat yang berada di sekitar ekosistem ini. Transplantasi karang memanfaatkan kemampuan regenerasi karang secara aseksual. Materi yang diamati dalam penelitian ini adalah fragmen karang Acropora aspera yang diambil dari perairan Pulau Panjang, Jepara. Penentuan spesies karang yang hendak digunakan, diawali dengan survey lapangan. Metode penelitian yang digunakan adalah eksperimen lapangan. Metode tanam yang digunakan adalah metode tempel tali dan metode tali gantung. Berdasarkan hasil dari penelitian yang telah dilakukan, maka dapat disimpulkan bahwa perlakuan metode tanam memberikan pengaruh yang nyata terhadap pertumbuhan karang, dimana perlakuan metode tanam gantung memberikan pertumbuhan yang lebih baik dibandingkan dengan metode tanam tempel. Hasil analisis data statistik untuk perlakuan metode menunjukkan adanya perbedan pertumbuhan yang nyata (P ≤ 0,05) antara metode tempel dan metode gantung. Perlakuan variasi ukuran fragmen 3 cm berbeda nyata dengan perlakuan ukuran fragmen 5 cm dan 7 cm. Sedangkan perlakuan ukuran fragmen 5 cm dan 7 cm tidak berbeda nyata. Tingkat keberhasilan kelangsungan hidup karang secara keseluruhan mencapai 83,33 %. Tingkat kelangsungan hidup tertinggi terlihat pada metode A (tempel) dengan ukuran awal fragmen 5 cm dan 7 cm menunjukkan nilai yaitu sebesar 100%. Transplantasi dengan metode tali yang paling efiien adalah menggunakan metode tanam gantung dengan ukuran 5 cm. Kata kunci : Transplantasi, Metode Tali, Acropora aspera, Teluk Awur Jepara  

oai:ojs.ejournal.undip.ac.id:article/50925 2024-07-04T18:54:21Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/50925 2024-07-04T18:54:21Z Buletin Oseanografi Marina Vol 13, No 2 (2024): Buletin Oseanografi Marina; 166-176 Pariakan, Arman; Program Studi Ilmu Perikanan Fakultas Pertanian, Perikanan dan Peternakan, Universitas Sembilanbelas November Kolaka Rahim, Rahim; Program Studi Ilmu Perikanan Fakultas Pertanian, Perikanan dan Peternakan, Universitas Sembilanbelas November Kolaka Indrayani, Indrayani; Jurusan Manajemen Sumberdaya Perairan Fakultas Perikanan dan Ilmu Kelautan, Universitas Halu Oleo 2024-06-05 22:58:05 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/50925 udang vaname; tambak; kesesuaian lahan id Udang vaname adalah spesies budidaya penting di Indonesia, terutama di Kabupaten Kolaka. Namun, hasil produksi dari kegiatan budidaya menurun setiap tahunnya. Ditemukan pertumbuhan udang tidak optimal dan munculnya penyakit hingga kegagalan panen yang pada akhirnya para pembudidaya merugi dan ditemukan telah banyak lahan budidaya yang terbengkalai. Hal ini diakibatkan karena tidak adanya evaluasi kesesuaian lahan sejak awal. Tujuan penelitian ini adalah mengevaluasi kesesuaian lahan pada tambak udang vaname di pesisir Kabupaten Kolaka khususnya pada Kecamatan Wundulako dan Pomalaa berdasarkan karakteristik air dan tanah.  Pengukuran parameter air dan tanah, seperti amonia, nitrit, salinitas, suhu, oksigen terlarut, pH air, pH tanah, dan potensial redoks tanah, dikumpulkan dari 50 lokasi tambak udang. Pengujian dilakukan baik di laboratorium maupun di lapangan (in situ). Data yang terkumpul dianalisis menggunakan metode analisis spasial Inverse Distance Weighted (IDW) dengan software ArcGIS 10.2., kemudian dipertajam dengan teknik tumpang susun yang digabungkan dengan kriteria kesesuaian lahan budidaya tambak udang vaname, yakni sangat sesuai, cukup sesuai, sesuai marjinal. kriteria kesesuaian ini telah diberi bobot nilai kepentingan berdasarkan pertimbangan studi kepustakaan dan pembenaran ahli.. Hasil analisis pada lokasi budidaya tambak udang di Kolaka ditemukan hanya dua kategori kesesuaian yaitu cukup sesuai dan sesuai marjinal dengan luas 1,208 Ha dan 13,7 Ha. Hasil dari penelitian ini memberikan panduan bagi pembudidaya dalam  memilih lokasi dan merencanakan tindakan dalam kegiatan budidaya udang vaname yang sesuai, sehingga diharapkan dapat meningkatkan produktivitas dan keberlanjutan usaha budidaya udang di masa depan.  Vaname shrimp is one of the shrimp species cultivated in Indonesia, especially in Kolaka Regency. However, production from aquaculture activities has decreased every year. It was found that shrimp growth was not optimal and the emergence of disease and crop failure resulted in farmers losing money and many cultivation areas were found abandoned. This is due to the absence of land suitability evaluation from the beginning. This study aims to evaluate the suitability of vaname shrimp ponds on the coast of Kolaka Regency, especially in Wundulako and Pomalaa sub-districts based on water and soil characteristics. Measurements of water and soil parameters, such as ammonia, nitrite, salinity, temperature, dissolved oxygen, water pH, soil pH, and soil redox potential, were collected from 50 shrimp pond sites. Tests were conducted both in the laboratory and in the field (in situ). The collected data were analyzed using the Inverse Distance Weighted (IDW) spatial analysis method with ArcGIS 10.2 software, then refined with overlapping techniques combined with land suitability criteria for white shrimp pond culture, namely highly suitable, moderately suitable, and marginally suitable. The suitability criteria have been given a weighted importance value based on the consideration of literature studies and expert justification. The results of the analysis on the location of shrimp aquaculture ponds in Kolaka found only two categories of suitability, namely moderately suitable and marginally suitable with an area of 1,208 Ha and 13.7 Ha. The results of this study guide farmers in selecting locations and planning actions in suitable vaname shrimp farming activities, so it is expected to increase the productivity and sustainability of shrimp farming in the future

oai:ojs.ejournal.undip.ac.id:article/52009 2023-11-04T02:49:24Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/52009 2023-11-04T02:49:24Z Buletin Oseanografi Marina Vol 12, No 3 (2023): Buletin Oseanografi Marina; 313-324 Putri, Ayunda Annisa; Jurusan Teknik Lingkungan, Fakultas Teknik, Universitas Tanjungpura Akbar, Aji Ali; Jurusan Teknik Lingkungan, Fakultas Teknik, Universitas Tanjungpura Romiyanto, Romiyanto; Jurusan Ilmu Tanah, Fakultas Pertanian, Universitas Tanjungpura Jati, Dian Rahayu; Jurusan Teknik Lingkungan, Fakultas Teknik, Universitas Tanjungpura Saziati, Ochih; Jurusan Teknik Lingkungan, Fakultas Teknik, Universitas Tanjungpura 2023-10-01 06:25:39 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/52009 Mangrove; lamun; karang; non-destruktif; pesisir id Potensi karbon biru (blue carbon) di pesisir Kalimantan Barat terdapat pada ekosistem mangrove, padang lamun, dan terumbu karang. Ketiga ekosistem ini tersebar di Kabupaten Sambas, Bengkayang, Mempawah, Kubu Raya, Ketapang dan Kota Singkawang. Penelitian ini bertujuan mengetahui luas dan keanekaragaman jenis ekosistem pesisir terkait dengan potensi karbon biru. Metode non-destruktif digunakan untuk mengkaji kemampuan ekosistem pesisir dalam menyerap karbon. Mangrove didominasi jenis didominasi oleh Rhizophora spp., Avicennia spp. Bruguiera spp., Sonneratia alba, Excoeacaria agallocha, dan Nypa fruticans. Padang lamun didominasi jenis Thalassia hemprichii dan Enhalus acoroides, sementara terumbu karang didominasi jenis Porites spp. dan Montipora spp. Estimasi serapan karbon terbesar berada di Kubu Raya sebesar 0,026 PgC (0,095 PgCO2e) dan yang terkecil berada di Kota Singkawang sebesar 0,000032 PgC (0,00012 PgCO2e). Penelitian ini mengungkap bahwa kemampuan serapan karbon berbanding lurus dengan luas ekosistem pesisir. Ekosistem mangrove merupakan ekosistem yang memiliki kemampuan dalam menyerap karbon, daripada ekosistem lamun dan terumbu karang. Upaya antropegenik memperparah degradasi ekosistem di pesisir Kalimantan Barat. The potency of blue carbon in the West Kalimantan is found in mangroves, seagrass beds, and coral reefs ecosystem. Sambas, Bengkayang, Mempawah, Kubu Raya, Ketapang, and Singkawang regencies coastal had a big potential blue carbon. This study aims to estimate the potential of blue carbon on coastal ecosystems diversity. This research was applying a non-destructive method to quantify the carbon sequestration of the ecosystems. Rhizophora spp., Avicennia spp, dominates mangrove, in Kalimantan Barat. Bruguiera spp., Sonneratia alba, Excoeacaria agallocha, dan Nypa fruticans, for mangroves, Thalassia hemprichii and Enhalus acoroides for seagrass and Porites spp. and Montipora spp, for coral reefs.  The most extensive estimated carbon sequestration is in Kubu Raya regency with 0.026 PgC (0.095 PgCO2e), and the smallest one is in the  Singkawang regency with 0.000032 PgC/ha (0.00012 PgCO2e/ha). Based on this research, it is observed that the ability of carbon sequestration is directly influenced by the coverage area of the coastal ecosystem, especially the mangrove forest which are dynamic due to anthropogenic activities.  

oai:ojs.ejournal.undip.ac.id:article/31733 2021-06-08T16:31:16Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/31733 2021-06-08T16:31:16Z Buletin Oseanografi Marina Vol 10, No 2 (2021): Buletin Oseanografi Marina; 189-199 Kurniawan, Revo Raprika; Departemen Ilmu Kelautan, Universitas Diponegoro Suprijanto, Jusup; Departemen Ilmu Kelautan, Universitas Diponegoro Ridlo, Ali; Departemen Ilmu Kelautan, Universitas Diponegoro 2021-05-22 17:24:30 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/31733 Microplastic; Sediment; Karimunjawa id Karimunjawa merupakan salah satu kawasan Taman Nasional yang terdapat di Indonesia yang terdiri dari pulau-pulau dan terbagi menjadi beberapa zona yang disesuaikan menurut fungsi dan peruntukkannya. Penelitian ini bertujuan untuk mengetahui jenis dan kelimpahan mikroplastik pada sedimen di zona pemukiman, zona pemanfaatan darat, dan zona perlindungan bahari Kepulauan Karimunjawa, Jepara. Sampel sedimen diambil dengan menggunakan pipa di 3 lokasi yaitu Pelabuhan Perintis, Legon Lele, dan Cemara Kecil. Sampel dikeringkan kemudian dipisahkan berdasakan ukuran butir menggunakan sieve shaker. Sedimen yang terjebak dalam sieve ukuran 0,3 dan 0,1 mm direndam dalam H2O2 30% selama 24 jam selanjutnya mikroplastik dipisahkan dari sedimen dengan 100 ml ZnCl2 densitas 1,5 g/cm-3 kemudian disaring dengan menggunakan kerta Whatman No. 40. Mikroplastik diamati bentuk, warna, dan jumlah menggunakan mikroskop cahaya dengan perbesaran 100x dan diidentifikasi secara visual. Jenis mikroplastik ditentukan dengan Uji FT-IR. Hasil menunjukkan kelimpahan mikroplastik tertinggi ditemukan pada lokasi Legon Lele dengan jumlah sebesar 340 partikel/kg, pada Pelabuhan Perintis sebanyak 245 partikel/kg, dan pada Cemara Kecil sebanyak 245 partikel/kg. Bentuk mikroplastik yang ditemukan yaitu fragment, film, dan fiber. Jenis mikroplastik diduga yaitu HDPE, PVC, Polypropylene (PP), Polystrene (PS), ABS, Latex, LDPE, Nitrile, dan Nylon. Karimunjawa is one of the National Park areas in Indonesia which consists of islands and is divided into zones which are adjusted according to their function and purpose. This study aims to determine the type and abundance of microplastics in sediments in residential zones, land use zones, and marine protection zones of the Karimunjawa Islands, Jepara. Sediment samples were taken using pipes in 3 locations, namely Perintis Harbor, Legon Lele, and Cemara Kecil. The sample is dried and then separated based on grain size using a sieve shaker. Sediments trapped in 0.3 and 0.1 mm sieve sizes were soaked in 30% H2O2 for 24 hours and then microplastic was separated from sediments with 100 ml of ZnCl2 density 1.5 g / cm-3 then filtered using Whatman No. kerta 40. Microplastic observed shapes, colors, and quantities using a light microscope with a magnification of 100x and identified visually. Microplastic type was determined by FT-IR Test. The results showed the highest microplastic abundance was found at the Legon Lele location with an abundance of 340 particles / kg, at the Port of Pioneer as much as 245 particles / kg, and at Cemara Kecil as much as 245 particles / kg. Microplastic forms found are fragments, films, and fibers. Microplastic types are suspected namely HDPE, PVC, Polypropylene (PP), Polystrene (PS), ABS, Latex, LDPE, Nitrile, and Nylon.

oai:ojs.ejournal.undip.ac.id:article/62747 2026-02-11T04:53:31Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/62747 2026-02-11T04:53:31Z Buletin Oseanografi Marina Vol 14, No 1 (2025): Buletin Oseanografi Marina; 69-80 Akbar, M. Apdillah; Program Studi Ilmu Kebumian, Fakultas Ilmu dan Teknologi Kebumian, Institut Teknologi Bandung Badan Meteorologi Klimatologi dan Geofisika Radjawane, Ivonne Milichristi; Program Studi Ilmu Kebumian, Fakultas Ilmu dan Teknologi Kebumian, Institut Teknologi Bandung Kelompok Keahlian Oseanografi Lingkungan dan Terapan, Fakultas Ilmu dan Teknologi Kebumian, Institut Teknologi Bandung Pusat Penelitian Kerjasama Teknologi Kelautan Korea-Indonesia, Institut Teknologi Bandung Nurdjaman, Susanna; Program Studi Ilmu Kebumian, Fakultas Ilmu dan Teknologi Kebumian, Institut Teknologi Bandung Pusat Penelitian Kerjasama Teknologi Kelautan Korea-Indonesia, Institut Teknologi Bandung Program Studi Oseanografi, Fakultas Ilmu dan Teknologi Kebumian, Institut Teknologi Bandung Napitupulu, Gandhi; Kelompok Keahlian Oseanografi Lingkungan dan Terapan, Fakultas Ilmu dan Teknologi Kebumian, Institut Teknologi Bandung Program Studi Oseanografi, Fakultas Ilmu dan Teknologi Kebumian, Institut Teknologi Bandung Hatmaja, Rahaden Bagas; Pusat Penelitian Iklim dan Atmosfer, Badan Riset dan Inovasi Nasional 2025-02-20 05:07:26 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/62747 Antisiklonik eddy; Pasifik bagian barat laut; Siklonik eddy; Variasi musiman id Samudra Pasifik barat laut merupakan wilayah yang penting secara geografis dan ekologis, Samudra ini dilalui North Equatorial Current (NEC), South Equatorial Current (SEC), dan North Equatorial Counter Current (NECC), pertemuan arus-arus tersebut dapat mengakibatkan terbentuknya eddy. Eddy merupakan pola sirkulasi air berputar yang memainkan peran penting dalam transpor massa, energi, dan nutrien di lautan. Eddy di belahan bumi utara (BBU) yang bergerak berlawanan jarum jam disebut siklonik eddy (CE) dan yang bergerak searah jarum jam disebut antisiklonik eddy (AE). Penelitian ini bertujuan untuk menginvestigasi karakteristik dan variasi musiman eddy di perairan Pasifik barat laut. Data harian anomali muka laut dan kecepatan geostropik dari satelit altimetri selama periode tahun 2003 hingga 2022 dianalisis untuk mengidentifikasi eddy berdasarkan ukuran, masa hidup, dan distribusi spasialnya. Deteksi eddy menggunakan metode hybrid antara SLA kontur tertutup dan parameter Okubo-Weiss. Ditemukan 435 eddy di perairan Pasifik barat laut dengan AE sebanyak 201 dan CE sebanyak 234 dalam kurun waktu 20 tahun. Hasil menunjukkan pola musiman yang jelas dalam distribusi spasial dan kekuatan eddy. Musim timur memiliki aktivitas eddy yang lebih tinggi daripada musim barat, kemungkinan terkait dengan faktor iklim regional seperti perubahan suhu permukaan laut dan pola angin musiman. Penelitian ini memberikan wawasan penting tentang dinamika eddy di Pasifik barat laut dan dapat dikembangkan untuk pengelolaan sumber daya laut dan mitigasi risiko bencana alam di wilayah tersebut.

oai:ojs.ejournal.undip.ac.id:article/15731 2020-04-17T12:02:59Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/15731 2020-04-17T12:02:59Z Buletin Oseanografi Marina Vol 5, No 2 (2016): Buletin Oseanografi Marina; 121-126 Mirawati, Fita; Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro Supriyantini, Endang Nuraini, Ria Azizah Tri 2016-10-09 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/15731 en Trimulyo dan Mangunharjo merupakan salah satu kawasan pesisir Semarang yang memiliki kawasan industri disekitarnya, sehingga berpotensi menjadi sumber logam berat Pb yang mencemari perairan. Penelitian ini bertujuan untuk mengetahui kandungan logam berat Pb pada air, sedimen, dan kerang hijau (P. viridis) dan mengetahui batas konsumsi mingguan kerang hijau (P. viridis). Penelitian ini dilaksanakan pada bulan Januari-Maret 2016. Metode penelitian adalah metode studi kasus dan pemilihan lokasi menggunakan metode purposive sampling. Sampel diambil dengan tiga kali pengulangan. Analisa logam berat menggunakan AAS (Atomic Absorbtion Spectrophotometry), sedangkan analisa keamanan konsumsi menggunakan MTI (Maximum Tolerable Intake). Hasil kisaran kandungan logam berat Pb dalam air pada Perairan Trimulyo dan Mangunharjo Semarang  rata-rata sebesar <0,003 mg/l. Kandungan logam berat Pb dalam sedimen pada Perairan Trimulyo berkisar antara <0,030-5,96 mg/kg, dan pada Perairan Mangunharjo berkisar antara <0,030-3,69 mg/l. kandungan logam berat Pb dalam jaringan lunak kerang hijau (Perna viridis) pada Perairan Trimulyo berkisar antara 0,26-0,32 mg/kg dan pada Perairan Mangunharjo berkisar antara 0,19-0,39 mg/kg. Berat maksimal asupan kerang hijau (P. viridis) yang aman dikonsumsi perminggu pada Perairan Trimulyo dan Mangunharjo Semarang untuk individu dengan berat badan 60 kg yaitu 5,769 kg/minggu dan 7,895 kg/minggu. sedangkan untuk individu dengan berat badan 45 kg yaitu 4,327 kg/minggu dan 5,921 kg/minggu. Kata kunci : Logam Berat Pb, P. viridis, MTI

oai:ojs.ejournal.undip.ac.id:article/39765 2022-09-07T17:08:50Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/39765 2022-09-07T17:08:50Z Buletin Oseanografi Marina Vol 11, No 2 (2022): Buletin Oseanografi Marina; 177-184 Putri, Wike Ayu Eka; Jurusan Ilmu Kelautan, Fakultas Matematika dan Ilmu Pengetahuan, Universitas Sriwijaya Susanti, Mei Ida; Jurusan Ilmu Kelautan, Fakultas Matematika dan Ilmu Pengetahuan, Universitas Sriwijaya Rozirwan, Rozirwan; Jurusan Ilmu Kelautan, Fakultas Matematika dan Ilmu Pengetahuan, Universitas Sriwijaya Hendri, M.; Jurusan Ilmu Kelautan, Fakultas Matematika dan Ilmu Pengetahuan, Universitas Sriwijaya Agustriani, Fitri; Jurusan Ilmu Kelautan, Fakultas Matematika dan Ilmu Pengetahuan, Universitas Sriwijaya 2022-05-20 08:04:59 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/39765 Muara Sungai Musi; Logam Berat; Sedimen; Tingkat Pencemaran Sedimen id Muara Sungai Musi merupakan perairan yang dipengaruhi oleh berbagai macam aktivitas manusia yang terdapat di sepanjang aliran Sungai Musi dan Sungai Telang serta kawasan muara itu sendiri. Ragam aktivitas ini berpotensi menimbulkan pencemaran di lingkungan perairan salah satunya adalah pencemaran logam berat. Tujuan penelitian ini adalah menganalis tingkat pencemaran logam berat Pb, Cu dan Zn di sekitar Muara Sungai Musi. Penelitian ini dilakukan pada bulan Agustus 2020, pengambilan sampel sedimen dilakukan pada enam titik stasiun dengan menggunakan metode purposive sampling. Konsentrasi logam berat dianalisis menggunakan Atomic Absorption Spectroscopy (AAS) merujuk pada SNI No. 06-6992.5-2004 untuk logam Cu, SNI No. 06-6992.3-2004 untuk logam Pb dan SNI No. 06-6992.8-2004 untuk logam Zn. Hasil penelitian menunjukkan bahwa konsentrasi rata-rata logam berat di sedimen Muara Sungai Musi berkisar antara 2,673 - 12,517 µg/g Pb, 1,927 - 5,9 µg/g Cu, 25,257 - 54,43 µg/g Zn. Kualitas sedimen dalam kategori baik dan aman bagi kehidupan biota di ingkungan Muara Sungai Musi karena rendahnya kontaminasi logam berat (Pb, Cu, Zn). Tingkat pencemaran logam berat Pb, Cu dan Zn di Perairan Muara Sungai Musi dalam kategori rendah dan tidak tercemar (I_geo<0), terkontaminasi rendah sampai sedang (Cf<1 sampai 1<Cf<3), serta tidak tercemar (PLI<1).  Musi River Estuary is waters that are influenced by various kinds of human activities originating from settlements, Musi River, Telang River and Bangka Strait causing pollution in the aquatic environment including heavy metal pollution. The purpose of this study was to analyze the level of heavy metal pollution Pb, Cu and Zn around the mouth of the Musi River. This research was conducted in August 2020 and sediment sampling was carried out at six stations using a purposive sampling method. Heavy metal concentrations were analyzed using Atomic Absorption Spectroscopy (AAS) refer to SNI No. 06-6992.5-2004 for Cu, SNI No. 06-6992.3-2004 for Pb and SNI No. 06-6992.8-2004 for Zn.. The results showed that the average concentration of heavy metals ranged from 2,873 – 12,51 µg/g Pb, 1,927 - 5,9 µg/g Cu, 25,257 - 54,43 µg/g Zn. The quality of the sediment is in the good and safe category because of the low contamination of heavy metals (Pb, Cu, Zn) for the life of biota in the Musi River Estuary Environment. The level of heavy metal pollution Pb, Cu and Zn in the Musi River Estuary is in the low category and not polluted (I_geo<0), low to moderate contamination (Cf<1 to 1<Cf<3), and not polluted (PLI<1).

oai:ojs.ejournal.undip.ac.id:article/2989 2012-04-03T06:26:38Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/2989 2012-04-03T06:26:38Z Buletin Oseanografi Marina Vol 1, No 1 (2011): Buletin Oseanografi Marina Helmi, Muhammad Hartoko, Agus S, Herkiki Munasik, Munasik Wouthuyzen, S The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/2989 en Abstract Coral reef and other coastal ecosystem map are very important spatial data to provide for many coastal management and planning purposes in Indonesia. Pari Islets of Thousand Islands in the northern coast of Jakarta has great variation on complex coastal ecosystem, such as beach forest, mangrove, coral reefs and seagrass. These rather large shallow and clear water islets could be ideal for satellite image spectral-respond study. The study aimed to asses spectral respond and spectral value of coral reef extraction on ALOS-AVNIR multispectral-satellite image in Pari Islets of Thousand Islands, Jakarta. THSI 4-band multispectral satellite image dated 30 April 2008 (JAXA, 2008) with 10 m spatial resolution. Ground survey was conducted in 85 sampling points between June-July 2009. A set of image processing method including geometric correction, atmospheric calibration (enhanced dark pixel correction), water column correction, Lyzenga transform, Hue Saturation Intensity (HSI) transform, Principle Component 1, scattergram analysis, spectral comparison, was applied for the multispectral image analysis, accompanied by   a Line Intercept Transect (LIT) and Manta-taw field survey for the coral reef study. The result showed that coral reef covers area in Pari islets were 249.9 ha (26.5%), seagrass 313.6 ha (33.3%) and shallow water sand 378.9 ha (40.2%).  Spectral characteristic of green and red band were much better on differentiating between coral reef and other shallow water substrate compared to the other bands. Visually coral reef identification on HSI transformed image much easier compared to on Lyzenga transformed image. The map accuracy on HSI (88.1%) also higher than Lyzenga (77.3%). Spectral values of coral reef on scattergram were clumped only on specific location and easily differentiated from other shallow water substrates, and so coral reef patch on ALOS-AVNIR satellite image could be extracted directly from the scattergram.   Key Word: Spectral respond, Coral reef, ALOS-AVNIR, Multispectral      

oai:ojs.ejournal.undip.ac.id:article/71562 2025-10-18T08:20:06Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/71562 2025-10-18T08:20:06Z Buletin Oseanografi Marina Vol 14, No 3 (2025): Buletin Oseanografi Marina; 362-368 Pariakan, Arman; Program Studi Ilmu Perikanan Fakultas Pertanian, Perikanan dan Peternakan, Universitas Sembilanbelas November Kolaka Rahim, Rahim; Program Studi Ilmu Perikanan Fakultas Pertanian, Perikanan dan Peternakan, Universitas Sembilanbelas November Kolaka Tasabarmo, Ilham Antariksa; Program Studi Ilmu Kelautan Fakultas Pertanian, Perikanan dan Peternakan, Universitas Sembilanbelas November Kolaka Indrayani, Indrayani; Jurusan Manajemen Sumberdaya Perairan Fakultas Perikanan dan Ilmu Kelautan, Universitas Halu Oleo 2025-10-18 15:20:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/71562 vibriosis, molekuler, budidaya udang vaname id Penyakit pada budidaya udang Litopenaeus vannamei dipicu oleh berbagai faktor salah satunya adalah vibriosis. Pengendalian penyakit vibriosis sangat bergantung pada informasi valid terkait jenis bakteri yang menyerang areal budidaya tambak udang L. vannamei.  Teknik genom dengan analisis berbasis urutan gen 16S rRNA merupakan metode yang dapat digunakan dalam identifikasi spesies bakteri. Tujuan penelitian ini adalah mengindentifikasi jenis bakteri vibrio di wilayah tambak udang pesisir Kabupaten Kolaka.  Penelitian dilaksanakan pada wilayah pesisir Kabupaten Kolaka Provinsi Sulawesi Tenggara, khususnya Kecamatan Wundulako dan Kecamatan Pomalaa.  Analisis identifikasi spesies bakteri dilakukan melalui beberapa tahapan yaitu; pengambilan sampel air pada 3 lokasi areal tambak udang; analisis karakteritik fisik bakteri; karakteriksasi secara biomolekuler menggunakan gen 16S rRNA. Hasil penelitian, ditemukan empat  isolat berdasarkan BLAST nukleotida dari NCBI, yaitu isolat Wundulako 1 dan 2 menunjukkan kesesuaian dengan Vibrio neocaledonicus dan Vibrio harveyi masing-masing sebesar 99%. Kemudian isolat Pomalaa 1 dan 1.1 menunjukkan  kesesuaian sebesar 100% untuk Vibrio sp dan Vibrio bacterium dengan kesamaan yang rendah sebesar 86,45% dan query cover 94%, sehingga isolat Pomalaa 1.1 dianggap sebagai spesies outgrup tersendiri pada pohon filogenetik. Studi ini,  memberikan dasar teori dan dukungan teknis untuk pencegahan penyakit yang efektif pada tahap postlarva hingga udang dewasa dan mendukung pengembangan industri udang yang sehat di pesisir Kabupaten Kolaka.

oai:ojs.ejournal.undip.ac.id:article/20896 2020-04-17T12:07:13Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/20896 2020-04-17T12:07:13Z Buletin Oseanografi Marina Vol 7, No 2 (2018): Buletin Oseanografi Marina; 75-80 Ambarwati, Diyah Putri; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Yudiati, Ervia; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Supriyantini, Endang; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Maslukah, Lilik; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2018-10-08 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/20896 Skeletonema; KNO3; pertumbuhan; biomassa; protein; KNO3; growth; biomass; protein en Mikroalga Skeletonema costatum merupakan pakan alami yang mengandung nutrisi yang diperlukan untuk budidaya perikanan. Modifikasi media kultur merupakan salah satu upaya optimalisasi produktivitas sekaligus meningkatkan kadar proteinnya. Penelitian ini bertujuan untuk mengetahui pengaruh pemberian KNO3 dengan berbagai konsentrasi terhadap pola pertumbuhan, biomassa dan kandungan protein kasar. Metode penelitian yang digunakan adalah metode eksperimen Rancangan Acak Lengkap, dengan lima konsentrasi KNO3 (A: 25; B:50; C:75; D:100 dan E:125 ppm) yang diulang sebanyak tiga kali. Inokulum awal adalah satu ton,103 sel/mL. Saat mencapai fase stasioner, kultur massal S. costatum dipanen dan dikeringkan. Kandungan protein kasar dianalisis menggunakan metode Kjeldahl. Hasil penelitian terhadap kepadatan menunjukkan bahwa perlakuan terbaik dicapai pada konsentrasi KNO3 125 ppm (498,88. 103 sel/mL) diikuti D (316,94. 10³ sel/mL), C (313,81.10³ sel/mL), B (246,56. 10³ sel/mL) dan A (195,60. 10³ sel/mL). Terdapat perbedaan fase stasioner pada masing-masing perlakuan yaitu A:32; B:28; C: 37; D:32; E:36 jam. Biomass rata-rata yang dihasilkan pada tiap perlakuan sesuai dengan pola kepadatan sel yaitu E: 8,60, D:7,85, C:6,43, B:5,91 dan A:5,44 g. Analisa terhadap kandungan protein kasar menunjukkan tidak adanya perbedaan antar perlakuan (P>0,05). Pemberian KNO3 terbukti dapat meningkatkan kepadatan sel dan berpengaruh terhadap pola pertumbuhan dan biomassa, namun kandungan protein kasar tidak meningkat. Growth, Biomass and Rough Protein Content of Skeletonema costatum Mass Scale with Different Concentration of Potassium Nitrate (KNO3) Skeletonema costatum is natural microalgae which rich in nutrient. An effort to optimize the protein content was done by modifying the culture media. This research is aimed to find out the effect of various concentration of KNO3 addition to the growth pattern, biomass and crude protein content. The Completely Randomized Design with five treatment KNO3 (A: 25; B:50; C:75; D:100 dan E:125 ppm) in three replication were applied. The starting innoculum was one tonne, 103 cel/mL. The microalgae was harvested at stationary phase and the dried. The crude protein was analised by Kjeldahl methods. The results of cell density showed that the best concentration was E (498,88. 103 cells/mL), D (316,94. 10³ cells/mL), C (313,81.10³ cells/mL), B (246,56. 10³ cells/mL) and A (195,60. 10³ cells/mL) respectively. The stationary phase in every treatment was reached at different time A:32; B:28; C: 37; D:32; E:36 hr. The average biomass were at similar pattern to the cell density (E:8,60, D:7,85, C:6,43, B:5,91 and A:5,44 g). On the other hand, the crude protein content were not significantly different (P>0,05). It is concluded that the KNO3 addition enhanced the cell density, growth pattern, biomass. The protein content was remain similar. 

oai:ojs.ejournal.undip.ac.id:article/49006 2023-05-13T09:22:51Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/49006 2023-05-13T09:22:51Z Buletin Oseanografi Marina Vol 12, No 1 (2023): Buletin Oseanografi Marina; 125-132 Dewi, Rose; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Jenderal Soedirman Winanto, Tjahjo; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Jenderal Soedirman Haryono, Florensius Eko Dwi; Magister Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Jenderal Soedirman Marhaeni, Bintang; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Jenderal Soedirman Hanifa, Ghina; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Jenderal Soedirman Nabila, Dhia; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Jenderal Soedirman Muis, Deny Rozaqul; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Jenderal Soedirman Khalisa, Syifa; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Jenderal Soedirman 2023-02-04 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/49006 Fitoplankton, Dunaliella salina, Intensitas cahaya, Klorofil (a,b), Karotenoid id Dunaliella salina merupakanfitoplankton Chlorophytayang potensial dikembangkan sebagai pakan alami, memiliki kandungan pigmen fotosintetikuntuk merespon intensitas cahaya dalam proses fotosintesisyakni klorofil dan karotenoid. Salah satu pemanfaatan pigmen fotosintetiksebagai sumber antioksidan. Sejauhini Pembudidaya ikan menggunakanpakan buatan maupun antioksidan sintestis dalam jumlah tinggi. Kajian ini diharapkan mampu meminimalisir penggunaan antioksidan sintetis dengan pemanfaatan pigmen fotosintetik. D. salina memiliki kemampuanmengakumulasi sejumlah pigmen fotosintetik dalam jumlah tinggi padakondisi terstimulasi, salah satunya adanya intensitas cahaya tinggi.Penelitian ini bertujuan untuk mengetahui intensitas cahaya yang dapat diresponpigmen fotosintetik secara optimal. Kajian menggunakanmetode eksperimental dengan variasiintensitas cahaya 500 lux(A);1029 lux(B); 2000 lux(C). D. salina dikulturpada media walne 1L (3x ulangan)tiap perlakuan. Konsentrasi pigmen fotosintetik klorofil a, b dan karotenoid (mg/m3)diukur menggunakan spektrofotometer UV-Vis pada absorbansi 470, 652 dan 665 nm. Hasil menunjukkan optimalitas konsentrasi klorofil a (0,049±0,015)mg/m3, klorofil b (0,055±0,025) mg/m3 dan karotenoid (0,178±0,122) mg/m3 pada intensitas cahaya tinggi (2000 lux). Hal ini membuktikanintensitas cahaya tinggi menyebabkan kondisi terstimulasi, yangmenyebabkanD.Salinamengakumulasi sejumlah pigmen fotosintetik dalam jumlah tinggi. D.salinamampu berstrategi mentoleransi intensitas cahaya tinggi hingga ambang batas tertentuuntuk mencapai optimalisasi pigmen, pembentukan produk fotosintesisserta menghasilkansenyawa antioksidan. Dunaliella salina is a Chlorophyta phytoplankton that has the potential to be developed as natural food, containing photosynthetic pigments to respond to light intensity in the photosynthesis process that is chlorophyll and carotenoids. One of the utilization of photosynthetic pigments as a source of antioxidants. So far, many fish cultivators use artificial feed and synthetic antioxidants. This research is expected to minimize the use of synthetic antioxidants by using photosynthetic pigments. D. salina has the ability to accumulate high amounts of photosynthetic pigments under stimulated conditions, one of which is the presence of high light intensity. This study aims to determine the optimal light intensity that can be responded by photosynthetic pigments. The study used an experimental method with variations in light intensity of 500 lux(A); 1029lux(B); 2000 lux(C). D. salina was cultured on 1L Walne medium (3x replicates) for each treatment. The concentrations of photosynthetic pigments chlorophyll a, b and carotenoids (mg/m3) were measured using a UV-Vis spectrophotometer at absorbances of 470, 652 and 665 nm. The results showed that the optimal concentration of chlorophyll a (0.049±0.015) mg/m3, chlorophyll b (0.055±0.025) mg/m3 and carotenoids (0.178±0.122) mg/m3 at high light intensity (2000 lux). This proves that high light intensity causes a stimulated condition, which causes D. Salina to accumulate high amounts of photosynthetic pigments. D.salina is able to tolerate strategies of high light intensity up to a certain threshold to achieve pigment optimization, formation of photosynthetic products and produce antioxidant compounds.

oai:ojs.ejournal.undip.ac.id:article/6938 2014-05-22T02:28:41Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6938 2014-05-22T02:28:41Z Buletin Oseanografi Marina Vol 2, No 2 (2013): Buletin Oseanografi Marina; 41-47 Soenardjo, Nirwani; Jurusan Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro 2013-04-18 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6938 en Komunitas mangrove di dusun Menco Demak didominasi oleh genus Bruguiera , Avicennia dan Rhizophora dan mengalami pemangsaan.   Penelitian ini dilakukan dengan tujuan untuk menganalisis tingkat pemangsaan daun Rhizophora stylosa Griff dan Avicennia marina (Forsk) Vierh, dan pengaruh umur serta tinggi tumbuhan terhadap pemangsaan. Tingkat pemangsaan daun terjadi pada daun tua dan muda kedua jenis mangrove .Hasil  penelitian menunjukkan adanya perbedaan tingkat pemangsaan daun antara Rhizophora stylosa dengan Avicennia marina. Tingkat pemangsaan pada daun Avicennia marina sebesar 7,92 % sedangkan Rhizophora stylosa 6,54%. Faktor umur  daun dan tinggi tumbuhan berpengaruh terhadap pemangsaan daun baik pada Rhizophora stylosa maupun Avicennia marina. Sedangkan faktor tinggi tumbuhan yang banyak terjadi pada ketinggian  <1m dan 2 - < 3 m untuk Rhizophora stylosa,  Avicennia marina pemangsaan daun  terjadi pada semua kategori ketinggian tumbuhan.   Kata kunci: mangrove, komunitas, pemangsaan,

oai:ojs.ejournal.undip.ac.id:article/29442 2020-09-27T10:49:01Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/29442 2020-09-27T10:49:01Z Buletin Oseanografi Marina Vol 9, No 1 (2020): Buletin Oseanografi Marina; 59-68 Febriawan, Hendra Kurnia; Badan Pengkajian dan Penerapan Teknologi Haryadi, Yudo; Badan Pengkajian dan Penerapan Teknologi Nurwahyudy, Aleik; Komite Nasional Keselamatan Transportasi 2020-04-30 08:00:14 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/29442 Vessel accident, Investigation, Hydro-acoustic survey, Side-scan sonar, Multibeam echosounder, Edge Detection Agency for The Assessment and Application of Technology en As an archipelagic country, the shipping sector in Indonesia becomes crucial in delivering goods inter-island, and due to increasing transportation demands. However, that industry encounters some challenges of the ocean environment that could lead to vessel accidents. An investigation into the accident is crucial since this is related to the properties, environment, and life disadvantages. The wrecks of sinking vessels also could harm the environment, providing an obstacle to the sea passage hence increasing the risk of a shipping operation. A proper and comprehensive investigation needs to be carried out to identify the factors that contribute to the accident, so then risk mitigation can be taken to prevent re-occurrence. In the case of missing foundered or sunken vessels, an underwater examination is a must, so the investigator understands the real condition of the vessel. Although diver and underwater robotic surveys are still prevalent in the investigation, these techniques have limitations due to visibility and location. By contrast, those limitations can be addressed using hydro-acoustic technologies, which are capable of providing high-resolution underwater images and digital elevation model (DEM) bathymetry. Thus, the use of these technologies is promising in-vessel accident investigation, both in-situ investigation, and post-processing analysis. This paper describes an examination of the use of side-scan sonar and multibeam echosounder in-vessel accident investigation. The use of slope feature and edge-detection technique are also investigated concerning the investigation. Results indicate that those acoustic systems can contribute to the inquiry effectively by portraying some underwater objects as the accident suspects. Besides, slope and edge detection methods also produce expectant outcomes to support underwater object detection and investigation.

oai:ojs.ejournal.undip.ac.id:article/49525 2024-05-31T07:50:39Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/49525 2024-05-31T07:50:39Z Buletin Oseanografi Marina Vol 13, No 1 (2024): Buletin Oseanografi Marina; 33-40 Hidayatullah, Muhamad Aziz; Program Studi Ilmu Kelautan, Jurusan Kelautan dan Perikanan, Fakultas Pertanian, Universitas Trunojoyo Madura Pratiwi, Wiwit Sri Werdi; Program Studi Ilmu Kelautan, Jurusan Kelautan dan Perikanan, Fakultas Pertanian, Universitas Trunojoyo Madura Sains dan Teknologi Penggaraman, Universitas Trunojoyo Madura Kartika, Ary Giri Dwi; Program Studi Ilmu Kelautan, Jurusan Kelautan dan Perikanan, Fakultas Pertanian, Universitas Trunojoyo Madura Sains dan Teknologi Penggaraman, Universitas Trunojoyo Madura Indriyawati, Novi; Program Studi Ilmu Kelautan, Jurusan Kelautan dan Perikanan, Fakultas Pertanian, Universitas Trunojoyo Madura Efendi, Makhfud; Program Studi Ilmu Kelautan, Jurusan Kelautan dan Perikanan, Fakultas Pertanian, Universitas Trunojoyo Madura Sains dan Teknologi Penggaraman, Universitas Trunojoyo Madura 2024-02-06 14:07:56 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/49525 barium terlarut; distribusi barium; estuari; laut id Barium (Ba) merupakan salah satu elemen minor di perairan laut yang memiliki nilai ekonomis tinggi apabila dimanfaatkan sebagai produk garam turunan. Sumber utama Ba terlarut berasal dari sungai, dan estuari menjalankan peran penting sebagai pengontrol fluktuasi kadar Ba terlarut pada sungai sebelum masuk ke laut. Penelitian ini bertujuan untuk mengetahui kadar Ba terlarut, distribusi Ba terlarut dan korelasi Ba terlarut dengan salinitas. Kadar Ba terlarut diketahui dari hasil pengujian sampel air laut yang diambil di 9 titik mulai dari daerah estuari hingga laut lepas. Pengujian kadar Ba terlarut menggunakan metode Atomic Absorption Spectrophotometry sesuai SNI 06-6989.39-2005. Kadar Ba terlarut di Perairan Padelegan berkisar antara 0,009-0,003 mg/L. Hasil visualisasi distribusi kadar Ba terlarut tertinggi berada di estuari dan kadar terendahnya berada di stasiun laut lepas. Distribusi Ba terlarut dari estuari hingga laut lepas menunjukkan kadar yang menurun secara bertahap. Hasil korelasi antara kadar barium terlarut dengan salinitas berbanding lurus yang disebabkan oleh intrusi air laut.  Barium (Ba) is a minor element in marine waters which has high economic value when used as a derivative salt product. The main source of dissolved Ba comes from rivers, and estuaries play an important role as controlling fluctuations in dissolved Ba levels in rivers before they enter the sea. This research aims to determine dissolved Ba levels, dissolved Ba distribution and the correlation of dissolved Ba with salinity. Dissolved Ba levels are known from the results of testing seawater samples taken at 9 points from the estuary area to the open sea. Dissolved Ba levels were tested using Atomic Absorption Spectrophotometry based on SNI SNI 06-6989.39-2005. Dissolved Ba levels in Padelegan Water range between 0,009-0,003 mg/L. Visualization results of the distribution of the highest dissolved Ba levels are in estuaries and the lowest levels are at open sea. The distribution of dissolved Ba from the estuary to the open sea shows gradually decreasing levels. Correlation results between dissolved barium levels and directly proportional salinity caused by seawater intrusion.

oai:ojs.ejournal.undip.ac.id:article/52800 2023-11-04T02:49:24Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/52800 2023-11-04T02:49:24Z Buletin Oseanografi Marina Vol 12, No 3 (2023): Buletin Oseanografi Marina; 403-412 Putra, Risandi Dwirama; Fakutlas Teknik dan Teknologi Kemaritiman, Universitas Maritim Raja Ali Haji Handayani, Reski Putri; Fakultas Ilmu Kelautan dan Perikanan, Universitas Maritim Raja Ali Haji Idris, Fadhliyah; Fakultas Ilmu Kelautan dan Perikanan, Universitas Maritim Raja Ali Haji Suhana, Mario Putra; Fakultas Ilmu Kelautan dan Perikanan, Universitas Maritim Raja Ali Haji Nugraha, Aditya Hikmat; Fakultas Ilmu Kelautan dan Perikanan, Universitas Maritim Raja Ali Haji 2023-10-01 07:40:33 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/52800 algoritma; Citra Satelite; Lamun; Lyzenga; engindraan Jauh id Ekosistem lamun dapat terganggu oleh berbagai faktor seperti perubahan suhu, polusi, kerusakan habitat, destructive fishing, dan pencemaran laut. Pemantauan kondisi lamun sangat penting dilakukan untuk memastikan keseimbangan ekosistem tetap terjaga, terutama pada daerah konservasi seperti di Desa Pengudang yang menjadi wilayah konservasi lamun. Salah satu cara yang dapat digunakan dalam mengamati kondisi ekosistem lamun untuk melihat perubahan yang terjadi adalah menggunakan kombinasi sistem informasi geografis dengan pengindraan jauh. Pada teknologi pengindraan jauh data yang digunakan yaitu Citra Sentinel-2A. Tujuan dari penelitian ini adalah memetakan luasan lamun di perairan Desa Pengudang dengan menggunakan Algoritma Lyzenga. Metode Lyzenga dikenal dengan nama metode depth-invariant index atau metode water column correction (koreksi kolom air). Koreksi kolom air bertujuan untuk mengeliminasi kesalahan identifikasi spektrum habitat karena faktor kedalaman selanjutnya dilanjutkan dengan proses supervised classification pada citra. Luasan lamun di perairan Desa Pengudang didapatkan berdasarkan hasil analisis klasifikasi terbimbing. Citra Sentinel-2A pada tahun 2018 mencapai angka 8.43 dan pada tahun 2020 mengalami penurunan dengan angka 7.30 hektar dengan nilai uji akurasi 80%. Penurunan luas padang lamun di perairan Desa Pengudang disebabkan oleh beberapa faktor, salah satunya adalah pencemaran minyak di wilayah Bintan yang terjadi secara teratur setiap tahun dan telah mempengaruhi kondisi ekosistem di wilayah tersebut.    Seagrass ecosystems can be disturbed by various factors such as changes in temperature, pollution, habitat destruction, and human activities, including unsustainable fishing, marine pollution, and chemical use. Therefore, monitoring the condition of seagrass ecosystems is essential to ensure the balance of the ecosystem is maintained, especially in conservation areas. Pengudang Village is one of the villages that has been designated as a seagrass conservation area. One of the ways to observe the condition of seagrass ecosystems and detect changes is to use a combination of geographic information systems and remote sensing. The data used in remote sensing technology is the Sentinel-2A image. The purpose of this research is to map the seagrass area in the waters of Pengudang Village using the Lyzenga Algorithm, also known as the depth-invariant index method or water column correction method. The water column correction method aims to eliminate errors in habitat spectral identification due to depth factors before proceeding with the supervised classification process on the image. The seagrass area in the waters of Pengudang Village was obtained based on the results of the supervised classification analysis. The Sentinel-2A imagery in 2018 covered an area of 8.43 hectares, and in 2020, it decreased to 7.30 hectares with an accuracy test value of 80%. The decrease in the seagrass area in the waters of Pengudang Village is caused by several factors, one of which is oil pollution in the Bintan region, which occurs regularly every year and has affected the condition of the ecosystem in the region.

oai:ojs.ejournal.undip.ac.id:article/35483 2021-06-08T16:31:23Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/35483 2021-06-08T16:31:23Z Buletin Oseanografi Marina Vol 10, No 2 (2021): Buletin Oseanografi Marina; 105-111 Kusumaningrum, Hermin Pancasakti; Fakultas Sains dan Matematika, Universitas Diponegoro Zainuri, Muhammad; Departemen Oseanografi , Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Marhaendrajaya, Indras; Fakultas Sains dan Matematika, Universitas Diponegoro Subagio, Agus; Fakultas Sains dan Matematika, Universitas Diponegoro Widianingsih, Widianingsih; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Endrawati, Hadi; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Fadillah, Annisa; Fakultas Sains dan Matematika, Universitas Diponegoro Zulkarnain, Muhammad Iskandar; Fakultas Sains dan Matematika, Universitas Diponegoro Muliastuti, Yuvita; Fakultas Sains dan Matematika, Universitas Diponegoro Misbach, Imam; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2021-05-22 17:24:24 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/35483 Nanosilver; microalgae; Penaeus monodon; Chlorella; Dunaliella en Penaeus monodon is one of the most important farmed crustaceans. Its also known as Asia Tiger Shrimp because its carapace and abdomen are transversely banded with red and white. The use of synthetic antibiotic in aquaculture had caused problems related to health and environmental safety. Chlorella pyrenoidosa and Dunaliella salina are photosynthetic microalgae. Silver nano particle in microalgae C. pyrenoidosa and D. salina had synthesized and showed their growth stability. They offer a potency to be exploited to supported growth and survival of shrimp larvae. The objective of the study was the application of silver nano particle in microalgae C. pyrenoidosa and D. salina on P. monodon larvae. The research methodology was carried out by making microalgae C. pyrenoidosa and D. salina containing silver nano particle and used as feed of shrimp larvae. Observations were made on the growth and survival of shrimp larvae compared to both microalgae and common feed. The results showed that the P. monodon larvae  have the higher growth and survival rate with microalgae C. pyrenoidosa at the beginning of their growth compared to D. salina. However, microalgae without nanosilver and common feed showed a better result for growth and activity of shrimp larvae.

oai:ojs.ejournal.undip.ac.id:article/63314 2024-11-04T07:16:45Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/63314 2024-11-04T07:16:45Z Buletin Oseanografi Marina Vol 13, No 3 (2024): Buletin Oseanografi Marina; 384-390 Setiawan, Rendy; Department of Biology, Faculty Mathematics and Sciences, Universitas Jember Amalia, Rizqy; Department of Biology, Faculty Mathematics and Sciences, Universitas Jember Fajariyah, Susantin; Department of Biology, Faculty Mathematics and Sciences, Universitas Jember Kurniawan, Joko; Mangrove Information Center 2024-10-30 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/63314 Arachnoides placenta; Duta Coastal; Distribution Pattern en Species Arachnoides placenta can be found in tropical waters, one of which is in the intertidal ecosystem in Duta Coastal. Substrate types at Duta Coastal are dominated by sand and silt substrates and a small portion of muddy sand substrate. The various types of substrates at Duta Coastal are thought to be causing the population A. placenta choose a suitable habitat for their life, so that it can affect the pattern of distribution and density of A. placenta. This research aims to determine the distribution pattern and density of A. placenta in the intertidal ecosystem in Duta Coastal. This study used the method of systematic transect plots. Plots measuring 1x1 m were placed on the transects with a distance between plots of 10 meters. The number of plots laid was 332 plots. The results show the number of individuals A. placenta in the Duta Coastal intertidal ecosystem 828 individuals. The population of the A. placenta species in the Duta Coastal intertidal ecosystem is quite large because the type of substrate is suitable for the life of A. placenta Morisita Index value for the distribution pattern A. placenta is 9.3. Distribution pattern A. placenta in the Duta Beach intertidal ecosystem classified as aggregated and density values A. placenta in the intertidal ecosystem in Duta Coastal is 2.5 ind/m2. 

oai:ojs.ejournal.undip.ac.id:article/11296 2020-04-17T12:02:05Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/11296 2020-04-17T12:02:05Z Buletin Oseanografi Marina Vol 5, No 1 (2016): Buletin Oseanografi Marina; 52-59 Hidayah, Greenaty; Program Studi Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Wulandari, Sri Yulina; Program Studi Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Zainuri, Muhammad; Program Studi Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2016-04-03 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/11296 en Daerah perairan muara Sungai Silugonggo merupakan salah satu wilayah yang terletak di pesisir Laut Jawa, Kabupaten Pati. Pada daerah pesisir di wilayah perairan ini terdapat pemukiman penduduk, pertambakan dan terdapat kawasan mangrove yang merupakan sumber utama nutrien yang masuk di perairan tersebut. Kondisi ini menyebabkan wilayah perairan muara Sungai Silugonggo akan mengalami persebaran sesuai dengan dinamika oseanografi. Tujuan penelitian ini adalah mengetahui pola sebaran dan nilai kandungan klorofil-a serta mengetahui pola arus yang mempengaruhi sebaran klorofil-a secara horizontal di Perairan Muara Sungai Silugonggo, Kecamatan Batangan, Pati. Penelitian ini menggunakan data primer berupa klorofil-a, nutrien, parameter kualitas perairan, arus dan data sekunder adalah bathimetri dan pasang surut. Pengolahan data menggunakan pemodelan numerik. Hasil penelitian ini menunjukkan nilai kandungan klorofil-a berdasarkan tanggal sampling berada pada kisaran 0,4981- 12,1307 mg/m3 dan memiliki nilai rata-rata setiap pengambilan sebesar 2,5348, 3,2425 dan 3,8499 mg/m3. Berdasarkan hasil pengamatan menunjukkan bahwa nilai kandungan klorofil-a secara horizontal di Perairan Muara Sungai Silugonggo lebih dipengaruhi oleh masukan dari sungai, vegetasi mangrove dan daerah pertambakan. Sebaran klorofil-a di Perairan Muara Sungai Silugonggo memiliki pola mengarah dari wilayah muara sungai ke arah laut. Persebaran klorofil-a secara horizontal dominan dipengaruhi oleh arus dengan pola mengarah dari timur laut (45º) ke arah barat daya (225º) dengan kecepatan berkisar 0,03-0,15 m/det. Kata Kunci: Sebaran, Horizontal, Klorofil-a, Silugonggo, Fisik-Kimia Perairan

oai:ojs.ejournal.undip.ac.id:article/39107 2022-05-20T01:15:04Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/39107 2022-05-20T01:15:04Z Buletin Oseanografi Marina Vol 11, No 1 (2022): Buletin Oseanografi Marina; 86-98 Hapsari, Faradian Nurul; Departemen Oseanografi Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Maslukah, Lilik; Departemen Oseanografi Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Dharmawan, I Wayan Eka; Pusat Penelitian Oseanografi, Lembaga Ilmu Pengetahuan Indonesia Wulandari, Sri Yulina; Departemen Oseanografi Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2022-01-30 16:19:39 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/39107 Mangrove; Karbon; Sedimen; Pasang Surut id Ekosistem mangrove memberikan kontribusi terbesar pada kawasan pesisir dalam penyerapan karbon dari atmosfer serta penyimpanan karbon dalam bentuk biomassa ataupun terpendam di dalam sedimen. Variasi simpanan karbon pada sedimen mangrove sangat tergantung dengan struktur komunitas dan karakter oseanografi yaitu pasang surut. Tujuan penelitian ini adalah untuk menganalisis variasi nilai simpanan karbon sedimen mangrove di Pulau Bintan serta menganalisis hubungannya dengan karakter pasang surut. Lokasi penelitian memiliki karakter struktur komunitas mangrove yang berbeda, yaitu Desa Lagoi yang didominasi oleh jenis Ceriops tagal, dan Desa Kawal yang didominasi oleh jenis Rhizophora apiculata. Setiap lokasi penelitian dibagi menjadi tiga zona tegak lurus garis pantai berdasarkan parameter dominansi jenis. Parameter yang diukur yaitu ukuran butir sedimen, struktur komunitas mangrove, karbon sedimen dan pasang surut. Data karbon organik dan ukuran butir sedimen menggunakan metode wet sieving dan LOI, sedangkan untuk pasang surut diperoleh dari Badan Informasi Geospasial (BIG). Hasil penelitian menujukan bahwa simpanan karbon organik sedimen yang lebih besar ditemukan di wilayah yang memiliki ukuran butir yang lebih halus dengan arus dan tenggang waktu menuju surut yang lebih rendah serta rerata ukuran dan tinggi mangrove yang lebih besar. Tenggang waktu menuju surut lebih cepat akan mengakibatkan perputaran sedimen dan serasah cepat sehingga pengendapan sedimen dan serasah berkurang. Simpanan karbon organik sedimen mangrove memiliki perbedaan yang cukup signifikan di Kawal dan Lagoi dengan rerata sebesar 13,90 ton C ha-1 dan 7,64 ton C ha-1. Mangrove ecosystems provide the largest contribution to coastal areas in absorbing carbon from the atmosphere and storing carbon in the form of biomass or buried in sediments. The variation of carbon storage in mangrove sediments is highly dependent on the community structure and the oceanographic character of the tides. The purpose of this study was to analyze variations in the value of carbon storage of mangrove sediments in Bintan Island and to analyze their relationship with tides. The research location has a different character of mangrove community structure, namely Lagoi Village which is dominated by the Ceriops tagal species, and Kawal Village which is dominated by the Rhizophora apiculata species. Each research location is divided into three zones perpendicular to the coastline based on the parameter of species dominance. Parameters measured were sediment grain size, mangrove community structure, sediment carbon and tides. Organic carbon and sediment grain size data using wet sieving and LOI methods, while tides were obtained from the Geospatial Information Agency (BIG). The results showed that larger organic sediment carbon stores were found in areas that had finer grain sizes with lower currents and time periods to tide and larger mean size and height of mangroves. The time to recede faster will result in rapid circulation of sediment and litter so that sediment and litter deposition is reduced. The organic carbon storage of mangrove sediments has a significant difference in Kawal and Lagoi with an average of 13.90 tonnes C ha-1 and 7.64 tonnes C ha-1.

oai:ojs.ejournal.undip.ac.id:article/2967 2012-04-03T02:35:29Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/2967 2012-04-03T02:35:29Z Buletin Oseanografi Marina Vol 1, No 1 (2011): Buletin Oseanografi Marina Setiyono, Heryoso Pratikto, Ibnu Hariyadi, Hariyadi The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/2967 en Abstract The Indonesian Decree No 32 / 2004 related to the Local Authority justified the coastal region management to the province and or region. The Government law related to the coastline determination is not yet defined. Due to the problem, the international procedure of the coastline determination were descriptively analyzed base on the sea law, geomorphology and plan mapping.Key-words : regional coast line, maritime line, international sea law 

oai:ojs.ejournal.undip.ac.id:article/69693 2026-02-11T04:49:13Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/69693 2026-02-11T04:49:13Z Buletin Oseanografi Marina Vol 14, No 2 (2025): Buletin Oseanografi Marina; 284-298 Maharani, Surfiarti; Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Bengkulu Ratnawati, Herlina Ika; Pusat Riset Iklim dan Atmosfer, Badan Riset dan Inovasi Nasional Lubis, Ashar Muda; Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Bengkulu 2025-06-10 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/69693 ENSO; IOD; Hujan; Perairan Bengkulu id Perairan Bengkulu terletak di sebelah barat Perairan Indonesia, berhadapan langsung dengan Samudera Hindia yang memengaruhi dinamika atmosfer-laut di wilayah tersebut. Penelitian ini bertujuan untuk mengetahui hubungan El Niño Southern Oscillation (ENSO) dan Indian Ocean Dipole (IOD) terhadap curah hujan dan Suhu Permukaan Laut (SPL). Data yang digunakan adalah data klimatologi (1993-2023) yang telah dikomposit dan dilakukan analisa korelasi. Hasil komposit SPL menunjukkan bahwa suhu tertinggi terjadi pada Maret–Mei (29°C-31°C), sedangkan suhu terendah pada Agustus–November (26°C-27°C). Curah hujan memiliki pola bimodial pada Maret dan Oktober/November. Hasil analisis korelasi mengindikasikan bahwa ENSO lebih memengaruhi SPL daripada curah hujan sedangkan IOD lebih dominan dalam SPL dan curah hujan. Fenomena El Niño dan IOD positif berdampak pada kurangnya curah hujan dan memperpanjang musim kemarau, sementara La Niña dan IOD negatif berdampak pada peningkatan curah hujan serta memperpanjang musim hujan. Hubungan El Niño dan La Niña diwakili oleh Oceanic Niño Index (ONI) terhadap curah hujan yang terjadi pada bulan September-Oktober-November (SON) dengan nilai korelasi -0.31 hingga -0.42. Sedangkan hubungan Dipole Mode Index (DMI) terhadap SPL pada periode SON menunjukkan nilai korelasi -0.70 hingga -0.78 dimana korelasi tertinggi pada Oktober (-0.78). Penelitian ini menegaskan bahwa ENSO-IOD berperan penting dalam pola iklim di Perairan Bengkulu. Bengkulu Waters are located in the western part of Indonesian Waters, directly facing the Indian Ocean, affecting the region's atmosphere-sea dynamics. This research aims to determine the relationship of ENSO and IOD to rainfall and SST. The data used are climatological (1993-2023) composited and correlation analysis is carried out. The SPL composite results show that the highest temperature occurs in March-May (29°C-31°C), while the lowest temperature is in August-November (26°C-27°C). Rainfall has a bimodial pattern in March and October/November. Correlation analysis results indicate that ENSO influences SST more than rainfall, while IOD is more dominant in SST and rainfall. Positive El Niño and IOD phenomena result in less rainfall and extended dry seasons, while negative La Niña and IOD result in increased rainfall and extended wet seasons. The ONI represents the El Niño and La Niña relationship to rainfall occurring in September-October-November (SON) with a correlation value of -0.31 to -0.42. Meanwhile, the DMI relationship to SST in the SON period shows a correlation value of -0.70 to -0.78, with the highest correlation in October (-0.78). This research confirms that ENSO-IOD plays an important role in climate patterns in Bengkulu Waters.

oai:ojs.ejournal.undip.ac.id:article/19036 2020-04-17T12:05:20Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/19036 2020-04-17T12:05:20Z Buletin Oseanografi Marina Vol 7, No 1 (2018): Buletin Oseanografi Marina; 1-8 Suryono, Suryono; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Soenardjo, Nirwani; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Wibowo, Edi; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Ario, Raden; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Rozy, Edi Fahrur; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2018-05-24 17:39:40 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/19036 Mangrove; Biomassa; Karbon; Bali; Carbon; en Ekosistem mangrove memiliki fungsi ekologis sebagai penyerap dan penyimpan karbon. Mangrove menyerap CO2 pada saat proses fotosintesis, kemudian mengubahnya menjadi karbohidrat dengan menyimpannya dalam bentuk biomassa pada akar ,pohon, serta daun. Tujuan dari penelitian ini adalah untuk mengetahui total above ground biomass, belowground biomass, simpanan karbon atas, simpanan karbon bawah, dan karbon organik pada sedimen dasar  di Hutan Mangrove Perancak, Jembrana, Bali. Sampling dilakukan dengan  metode purposive sampling dengan dasar pertimbangan berupa jenis, kerapatan serta diameter pohon mangrove. Estimasi biomassa digunakan  metode tanpa pemanenan dengan mengukur diameter at breast height (DBH, 1.3 m) mangrove. Simpanan karbon diestimasi dari 46% biomasa. Kandungan karbon organik pada sedimen diukur dengan  menggunakan metode lost on ignition (LOI). Hasil penelitian menunjukkan total above ground biomass sebesar 187,21 ton/ha, below ground biomass sebesar 125,43 ton/ha, simpanan karbon atas sebesar 86,11 ton/ha, simpanan karbon bawah sebesar 57,69 ton/ha, sedangkan  karbon organik sedimen sebesar 359,24 ton/ha. The mangrove ecosystem has ecological functions as an absorber and carbon storage. Mangrove absorbs CO2 during the process of photosynthesis, then changes it into carbohydrates bystoring it in the form of tree biomass. The aim of this research is to know the total of above ground biomass, below ground biomass, upper carbon storage, lower carbon storage, and sediment organic carbon in Perancak Mangrove Forest, Jembrana, Bali. The selection of sampling location using purposive sampling method with consideration of type, density and diameter of mangrove. The estimatorion of biomass using the method without harvesting by measuring diameter at breast height (DBH, 1.3 m) mangrove. Carbon deposits are estimated from46% of biomass. The organic carbon content of sediment was measured using the lost on ignition (LOI) method. The results showedthat  the total of above ground biomass of 187.21 ton / ha, below ground biomass 125,43 ton / ha, upper carbon store of 86,11 ton / ha, lower carbon store of 57,69 ton / ha, and organic carbon sedimen to 359.24 tons / ha.

oai:ojs.ejournal.undip.ac.id:article/47765 2023-05-13T09:22:51Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/47765 2023-05-13T09:22:51Z Buletin Oseanografi Marina Vol 12, No 1 (2023): Buletin Oseanografi Marina; 36-42 https://ejournal.undip.ac.id/index.php/buloma/article/download/47765/150884 Nurfajriyah, Hani’atun; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Hartati, Retno; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Subagiyo, Subagiyo; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Yusidarta, Isai; Balai Taman Nasional Laut Kepulauan Seribu. Ditjen Konservasi Sumberdaya Alam dan Ekosistem, Kementerian Lingkungan Hidup dan Kehutanan Mustalafin, Mustalafin; Balai Taman Nasional Laut Kepulauan Seribu. Ditjen Konservasi Sumberdaya Alam dan Ekosistem, Kementerian Lingkungan Hidup dan Kehutanan 2023-02-04 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/47765 penyu; Fusarium; jamur; pelestarian penyu; prevalensi infeksi; sanitasi id Penyu merupakan jenis reptil yang langka secara global berdasarkan IUCN Red List of Threatened Species, dan salah satu masalah dihadapi dalam kegiatan pelestarian penyu adalah penyakit, diantaranya disebabkan oleh jamur. Penelitian ini bertujuan untuk mengidentifikasi jenis jamur yang menginfeksi penyu, mengetahui jenis penyakit yang disebabkan oleh jamur, prevalensi infeksi jamur serta kondisi sanitasi dan keterkaitannya dengan kejadian infeksi jamur pada penyu di Pelestarian Penyu, Pulau Kelapa Dua, Taman Nasional Laut Kepulauan Seribu, DKI Jakarta. Pengamatan terjadinya infeksi dilakukan terhadap 216 ekor penyu yang ada di pelestarian penyu, yaitu pada flipper, mata, leher, pangkal ekor dan bagian plastron. Setiap dijumpai adanya infeksi jamur, dilakukan pengambilan sampel jamur dengan metode swabbing. Jumlah individu penyu yang terinfeksi dihitung dan dibandingkan dengan jumlah seluruh penyu yang diamati (diperoleh angka prevalensi infeksi jamur). Sampel jamur selanjutnya diisolasi pada media PDA (Potato Dextrose Agar) menggunakan metode spread plate. Isolat murni yang didapat diidentifikasi secara makroskopis dan mikroskopis (menggunakan mikroskop dengan pewarnaan menggunakan Lactophenol cotton blue).  Penelitian yang dilakukan di bulan Januari 2020 mendapatkan tiga ekor penyu hijau (Chelonia mydas) berusia 9 bulan yang terinfeksi jamur, sehingga angka prevalensi infeksi adalah 0,014% (sangat rendah). Hal ini dimungkinkan karena kondisi sanitasi yang baik dan pergantian air 2 kali sehari sehingga parameter kualitas air di bak pemeliharaan, seperti suhu, salinitas dan pH sesuai dengan persyaratan untuk pemeliharaan penyu. Isolate jamur yang menginfeksi penyu di pelestarian penyu ini teridentifikasi sebagai anggota dari genus Fusarium.   Turtles are endangered reptile based on the IUCN Red List of Threatened Species, and one of the problems faced in turtle conservation activities is disease, including fungi. This study aimed to identify the species of fungi that infect turtles, the prevalence of fungal infections and sanitary conditions and their relationship to the incidence of fungal infections in turtles in Turtle Conservation, Kelapa Dua Island, Thousand Islands Marine National Park, DKI Jakarta. Observations of the occurrence of infection were carried out on 216 turtles, i.e. on their flippers, eyes, neck, base of the tail and the plastron. When a fungal infection was found, fungal samples were taken using the swabbing method. The number of infected individual turtles was counted and the prevalence rate of fungal infection was obtained. The fungi samples were then isolated on PDA (Potato Dextrose Agar) media using the spread plate method. The pure isolates obtained were identified macroscopically and microscopically (using a microscope with staining using Lactophenol cotton blue). Research conducted in January 2020 found that three 9-month-old green turtles (Chelonia mydas) infected with fungi, so the prevalence rate of infection was 0.014% (very low). This is possible due to good sanitation conditions in which the water was changed twice a day so that the water quality parameters in the rearing tank, such as temperature, salinity and pH are in accordance with the requirements for turtle rearing. The isolates of fungi that infect turtles in turtle conservation were identified as members of the genus Fusarium.

oai:ojs.ejournal.undip.ac.id:article/6926 2014-05-20T05:45:30Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6926 2014-05-20T05:45:30Z Buletin Oseanografi Marina Vol 2, No 1 (2013): Buletin Oseanografi Marina; 48-50 Irwani, Irwani; PS. Ilmu Kelautan, Jur. Ilmu Kelautan FPIK UNDIP 2013-01-20 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6926 en The successful of spores settlement on the surface depend on the material and roughed of the surface. The aim of the present study was to find out artificial substrates as spores sticking to be thallus.  Randomised design with 4 treatment (raffia line, nylon line, palm line and cotton line) and 9 replicate was used in this study. The highest thallus of G. gigas after grow after 2 moths rearing in the aquarium with the greatest number of thallus which stick on raffia line and the lowest stick on cotton and palm line.  The effect of different artificial substrates showed was different significantly (p<0.001).   Key Words :Gracilaria gigas, spores, subtrate, raffia line

oai:ojs.ejournal.undip.ac.id:article/81010 2026-02-11T04:57:56Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/81010 2026-02-11T04:57:56Z Buletin Oseanografi Marina Vol 15, No 1 (2026): Buletin Oseanografi Marina; 119-133 Octavianna, Pramesthi Dwi; Program Magister Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Helmi, Muhammad; Departemen Oseanografi Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Maslukah, Lilik; Departemen Oseanografi Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Zainuri, Muhamad; Departemen Oseanografi Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Ismanto, Aris; Departemen Oseanografi Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2026-02-25 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/81010 eutrofikasi; Trophic State Index; perairan pesisir; kualitas perairan; tutupan lahan ID Perairan pesisir Kota Pekalongan merupakan wilayah yang rentan terhadap eutrofikasi akibat tingginya aktivitas antropogenik di daratan, seperti kawasan terbangun, tambak, dan pertanian, yang berpotensi meningkatkan masukan nutrien ke perairan laut. Penelitian ini bertujuan untuk mengkaji status trofik perairan pesisir Kota Pekalongan berdasarkan Trophic State Index (TSI), menganalisis perbedaan karakteristik kualitas perairan antara area pesisir dan area transisi pesisir–laut, serta mengkaji keterkaitannya dengan kondisi tutupan lahan daratan. Pengambilan data kualitas perairan dilakukan dalam satu hari pengamatan dengan total 77 titik sampling, meliputi parameter klorofil-a, nitrat, fosfat, total padatan tersuspensi, oksigen terlarut, suhu, salinitas, pH, dan kecerahan. Nilai TSI dihitung berdasarkan indikator klorofil-a, nutrien, dan kecerahan, kemudian dianalisis secara spasial menggunakan interpolasi spline, serta didukung oleh analisis deskriptif berupa boxplot. Hasil penelitian menunjukkan bahwa area pesisir memiliki tingkat eutrofikasi yang relatif lebih tinggi dan lebih bervariasi dibandingkan area transisi, yang dicirikan oleh konsentrasi nutrien dan klorofil-a yang lebih tinggi serta kecerahan yang lebih rendah. Dominasi tutupan lahan terbangun dan tambak di wilayah daratan berpotensi berkontribusi terhadap kondisi eutrofikasi perairan pesisir. Hasil penelitian ini menegaskan pentingnya pengelolaan wilayah daratan sebagai bagian dari upaya mitigasi eutrofikasi dan pengelolaan perairan pesisir secara berkelanjutan.

oai:ojs.ejournal.undip.ac.id:article/25349 2020-04-17T12:08:41Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/25349 2020-04-17T12:08:41Z Buletin Oseanografi Marina Vol 8, No 2 (2019): Buletin Oseanografi Marina; 75-80 Fatoni, Khoirol Imam; Sekolah Staf dan Komando Angkatan Laut Puliwarna, Tunggul; Sekolah Staf dan Komando Angkatan Laut Manurung, Parluhutan; Sekolah Staf dan Komando Angkatan Laut 2019-10-04 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/25349 ultrasonik; online; GPRS; pasang surut; real time; Pushidrosal id Pengembangan teknologi sensor ultrasonik yang relatif terjangkau dan berkualitas untuk pemantauan dinamika muka air laut di perairan Indonesia dapat dikatakan masih relatif minim di Indonesia. Sementara kebutuhan studi untuk kepentingan riset hidrografi, oseanografi, kegiatan pelayaran, riset datum vertikal, dan pemantauan bencana seperti banjir dan bencana tsunami, sangat penting dikembangkan. Di era 4.0 saat ini, perkembangan teknologi komunikasi data digital GPRS sudah hampir  mencakup seluruh pelosok negeri, ditambah banyaknya komponen elektronik dan sensor yang dapat diintegrasikan sesuai dengan kebutuhan, maka lebih mudah menerapkan konsep pengukuran dengan sistem online yang mempunyai kemampuan realtime monitoring terkoneksi dengan jaringan internet. Hasil penelitian menunjukkan teknologi sistem pengukuran realtime yang terdiri atas 5 komponen yang terintegrasi yaitu; 1) Sensor pemantau tinggi permukaan air presisi, 2) Data Logger dengan microcontroller yang mengatur sensor, modem GPRS/GSM, power system, memory card, dan GPS Timing, 3) Cloud data server, dan 4) Aplikasi online monitoring. Pengukuran dengan sistem online ini sudah diinstalasi Pushidrosal untuk kepentingan pengukuran pasang surut periode panjang di beberapa lokasi strategis, serta seluruh stasiun menghasilkan data sekitar 98% per tahun. Peralatan pengukuran yang dihasilkan, mudah dioperasikan, mudah dimobilisasi, kandungan material lokal, serta data yang diperoleh mempunyai ketelitian pengamatan < 1% dengan ketinggian terkontrol GPS serta interval pengukuran hingga 1 menit. The development of ultrasonic sensor technology that is relatively affordable and of high quality for monitoring sea level dynamics in Indonesian waters can be said to be still relatively minimal in Indonesia. While the need for studies for research purposes is required to serve various applications as such as hydrographic research, oceanography, shipping activities, vertical datum research, and monitoring disasters such as floods and tsunami disasters, are very important to be developed. In the 4.0 era, the development of GPRS digital data communication technology has almost covered all corners of the country, plus many electronic components and sensors that can be integrated according to needs, it is easier to apply the concept of measurement with online systems that have realtime monitoring capabilities connected to the internet network. The results showed the realtime measurement system technology consisting of 5 integrated components namely; 1) Sensor for precision water level monitoring, 2) Data Logger with a microcontroller that controls sensors, GPRS / GSM modem, power system, memory card, and GPS Timing, 3) Cloud data server, and 4) Online monitoring application. Measurement with this online system has been installed by Indonesian Naval Hydrographic and Oceanographic Center for measuring long-term tides in several strategic locations, and all stations produce about 98% of data per year. Measuring equipment easy to operate, easy to mobilize, local material content, as well as data obtained has observation accuracy <1% with GPS controlled altitude, and data interval until 1 minutes.

oai:ojs.ejournal.undip.ac.id:article/6952 2014-05-22T08:30:37Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6952 2014-05-22T08:30:37Z Buletin Oseanografi Marina Vol 2, No 3 (2013): Buletin Oseanografi Marina; 63-70 Ismanto, Aris; Program Studi Oseanografi Universitas Diponegoro Munadi, Suprajitno; Program Studi Oseanografi Universitas Diponegoro Rubyanto, Djoko; Program Studi Oseanografi Universitas Diponegoro 2013-07-22 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6952 en Metoda inversi post-stack merupakan metoda yang paling umum digunakan, karena relatif mudah dilakukan dan ekonomis. Data masukannya harus berupa seismik zero offset, dan hasilnya adalah distribusi Akustik Impedansi (AI) yang menggambarkan perlapisan (layer), bukan lagi bidang batas (interfaces) seperti pada seismik biasa. Hilangnya informasi frekuensi rendah dan frekuensi tinggi adalah salah satu  persoalan yang sering timbul pada proses inversi. Hal ini terjadi karena pita frekuensi wavelet yang terbatas sehingga informasi deret koefisien refleksi di luar lebar pita wavelet tersebut hilang. Dengan kata lain spectrum wavelet atau deret koefisien refleksi tidak memiliki energy pada frekuensi tersebut atau bernilai nol. Sehingga terjadi ketidakakuratan pada log impedansi akustik. Salah satu teknik inversi yang bisa digunakan  untuk mengatasi masalah tersbut adalah metode sparse spike dengan pemrograman linier. Upaya tersebut merupakan  proses dalam  inversi seismik untuk memperoleh gambaran impedansi akustik yang benar dan tepat, sehingga dapat mempermudah dalam proses interpretasi suatu  reservoar serta mengurangi resiko kegagalan dalam pemboran. Pemodelan  ini di kerjakan pada batuan karbonat Formasi Kujung dengan menggunakan data sintetik dan data riil. Implementasi program Inversi sparse spike dengan pemrograman linier secara keseluruhan dilakukan dengan menggunakan bahasa pemrograman MATLAB dan Hampson Russel dengan modul Strata. Hasil inversi berupa penampang impedansi Akustik cukup baik digunakan untuk mengkarakterisasi reservoar. Inversi pemrograman linier sparse spike dengan implementasi Matlab menghasilkan Impedansi akustik yang sama baiknya dengan program yang sudah ada yaitu Hampson Rusell. Metode LP Sparse Spike cukup baik untuk mengestimasi reflektivitas. Namun estimasi wavelet sumber dan model konstrain yang diberikan akan mempengaruhi hasil inversi .   Kata kunci: Linear Programming Sparse Spike Inversion, impedansi akustik, Matlab, Hampson Russel, Strata

oai:ojs.ejournal.undip.ac.id:article/29036 2021-02-01T08:06:32Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/29036 2021-02-01T08:06:32Z Buletin Oseanografi Marina Vol 10, No 1 (2021): Buletin Oseanografi Marina; 67-74 Ondara, Koko; Research Institute for Coastal Resources and Vulnerability, Ministry of Marine Affairs and Fisheries Wisha, Ulung Jantama; University of the Ryukyus Panjaitan, Serli Marlinda; Marine Science Department, Sriwijaya University 2021-02-01 10:08:10 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/29036 Particle tracking; PFAD; Bayur Bay; Navier Stokes discrete Research Institute for Coastal Resources and Vulnerability, Ministry of Marine Affairs and Fisheries en Oil spilled in the marine ecosystem may be induced by some sources which alter over time and location. Oil leakage from offshore oil drilling, underwater oil pipeline leakage, etc., are the possible source of oil spill pollution. Marine pollution generated by oil spilling occurred in Padang City in 2017. Palm Fatty Acid Distillate (PFAD) spilled within Bayur Bay Harbor due to a leaking storage tank. As much as 50 tons of PFAD overflowed and commenced to pollute Bayur coastal bay. This study aimed to determine the distribution pattern of oil spills throughout the Bayur Bay based on a hydrodynamical model. We employed some oceanographic data and PFAD characteristics obtained directly from survey results. We simulated the particle tracking model for 30 days since the PFAD spilled within the port.  The model developed applied the Least Square method to analyze tidal data and a flexible mesh as a model basis, while the governing equation used is Navier Stoke discrete. During a month of simulation, the dominant particles' distribution is still spinning around the Bayur Bay due to the weak current characteristics with the magnitude ranging from 0.02-0.06 m/s. The lighter PFAD particle mass tended to move faster throughout the bay and settled in the coastal area. It will pollute the coastal system even though it is going to be decomposed chemically in the sediment.

oai:ojs.ejournal.undip.ac.id:article/57667 2024-07-04T18:54:21Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/57667 2024-07-04T18:54:21Z Buletin Oseanografi Marina Vol 13, No 2 (2024): Buletin Oseanografi Marina; 177-188 Pangastuti, Prima Riliayunda; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Helmi, Muhammad; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Pusat Unggulan Ipteks, Pusat Kajian Bencana dan Rehabilitasi Pesisir, Universitas Diponegoro Atmodjo, Warsito; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2024-06-05 22:58:05 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/57667 Banjir pasang; Elevasi Muka Air; Penurunan Muka Tanah id Pesisir Kabupaten Cirebon didominasi oleh kawasan pemukiman, industri dan tambak udang. Wilayah pesisir tersebut mengalami banjir pasang dan telah berdampak pada kerusakan bangunan pemukiman dan industri di wilayah tersebut. Banjir pasang terjadi secara berkala sesuai dengan kondisi pasang surut dengan liputan area genangan yang terus bertambah. Tujuan dari penelitian ini adalah untuk mengetahui tinggi dan luas genangan banjir pasang yang terjadi di kawasan pemukiman dan industri akibat elevasi muka air. Model genangan banjir pasang dibangun secara spasial menggunakan nilai elevasi muka tanah di pesisir yang berasal dari Rupabumi Indonesia skala 1:25.000 dan nilai elevasi muka air yang didapatkan dari hasil pemodelan hidrodinamika dua dimensi Bulan Mei 2022. Sebaran genangan banjir pasang kemudian dikaji bersama nilai laju penurunan muka tanah yang didapatkan dari pengolahan Citra Sentinel-1 menggunakan metode DIn-SAR. Hasil penelitian ini menunjukkan nilai elevasi muka air tertinggi sebesar 0,40 m dengan sebaran banjir pasang terjadi secara merata pada Kecamatan Pangenan, Kecamatan Gebang, dan Kecamatan Losari dengan ketinggian 0,1 – 0,6 m dan total luasan genangan adalah 2009,01 ha. Laju penurunan muka tanah yang terjadi adalah sebesar 0,5 – 6 cm mengindikasikan pola sebaran banjir pasang yang terjadi bisa semakin parah, khususnya pada area yang rawan terdampak yaitu kawasan industri garam dan pemukiman sehingga diperlukan penanganan lanjutan untuk mengatasi sebaran dan dampak genangan yang terjadi  The coast of Cirebon Regency is dominated by residential areas, industries and shrimp ponds. This coastal area experienced tidal flooding and this had an impact on damage to residential buildings and the industry in the area. Tidal floods occur periodically according to tidal conditions with inundation area coverage continuing to increase. The aim of this research is to determine the height and extent of tidal flood inundation that occurs in residential and industrial areas due to water level elevation. The tidal flood inundation model was built spatially using land surface elevation values on the coast originating from Indonesian Rupabumi at a scale of 1:25,000 and water surface elevation values obtained from the results of two-dimensional hydrodynamic modeling in May 2022. The distribution of tidal flood inundation was then studied together with the decline rate values. land surface obtained from processing Sentinel-1 imagery using the DIn-SAR method. The results of this research show that the highest water level elevation value is 0.40 m with the distribution of tidal flooding occurring evenly in Pangenan District, Gebang District, and Losari District with a height of 0.1 - 0.6 m and the total area of inundation is 2009.01 ha. . The rate of land subsidence that occurs is 0.5 – 6 cm, indicating that the distribution pattern of tidal flooding that occurs could get worse, especially in areas that are prone to being affected, namely salt industrial areas and residential areas, so further treatment is needed to overcome the distribution and impact of the inundation that occurs.

oai:ojs.ejournal.undip.ac.id:article/11220 2016-06-07T23:59:17Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/11220 2016-06-07T23:59:17Z Buletin Oseanografi Marina Vol 1, No 2 (2012): Buletin Oseanografi Marina; 40-48 Suryanti, Suryanti; Fakultas Perikanan dan Ilmu Kelautan UNDIP Hermanto, Fredy; Fakultas Perikanan dan Ilmu Kelautan UNDIP 2012-01-03 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/11220 en Tujuan penelitian untuk mengetahui perbedaan presentasi penutupan karang dan pengaruh faktor lingkungan di perairan terbuka dengan perairan yang terhalang pulau-pulau di Pulau Pramuka Kepulauan Seribu Jakarta. Metode penelitian ini adalah metode survei yang bersifat deskriptif. Pengambilan data penutupan karang hidup menggunakan transek garis di perairan terbuka dengan perairan yang terhalang pulau-pulau dari pertama kali karang ditemukan hingga daerah tubir. Hasil penelitian berdasarkan jarak dari pantai menunjukkan bahwa kondisi karang di perairan terbuka berada dalam kategori buruk,  sedangkan kondisi karang di perairan yang terhalang pulau-pulau sebagian besar berada dalam kategori baik. Penutupan karang tertinggi terdapat pada perairan yang terhalang pulau-pulau yaitu 78,83% dan  terkecil terdapat pada perairan terbuka yaitu 0,63 %. Parameter lingkungan dalam penelitian di kedua lokasi menunjukan kondisi yang layak untuk kehidupan terumbu karang. Pada perairan terbuka didapatkan hubungan penutupan karang dengan parameter lingkungan sebesar 81,54% sedangkan di perairan yang terhalang pulau-pulau sebesar 95,68%. Hasil analisis T hitung = 2,797 > T tabel = 2,051, sehingga dapat disimpulkan bahwa penutupan karang di kedua wilayah tersebut berbeda .   Kata kunci: Penutupan Karang, Perairan Terbuka, Perairan yang Terhalang Pulau-pulau

oai:ojs.ejournal.undip.ac.id:article/37238 2022-05-20T01:15:04Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/37238 2022-05-20T01:15:04Z Buletin Oseanografi Marina Vol 11, No 1 (2022): Buletin Oseanografi Marina; 1-10 Ardiansyah, Anwan Rahmat; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Brawijaya Anggara, Arik; Clungup Mangrove Conservation Tiga Warna Sartimbul, Aida; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Brawijaya Marine Resources Exploration and Management (MEXMA), Universitas Brawijaya 2022-01-30 16:19:33 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/37238 Mangrove; Supervised Maximum Likelihood; Indeks Nilai Penting id Mangrove merupakan tumbuhan yang hidup di garis pantai pasang surut, zonasi tumbuhan mangrove memiliki berbagai variasi pada lokasi yang berbeda, ditentukan oleh jenis tanah, kedalaman dan periode genangan, kadar garam dan daya tahan terhadap ombak serta arus. Tujuan penelitian ini adalah untuk mengetahui sebaran spesies mangrove dan juga Indeks Nilai Penting spesies mangrove pada Kawasan Clungup Barat 1 dengan pendekataan pemetaan lahan Supervised Classification dengan algoritma Maximum Likelihood. Penelitian dilakukan sejak 3 Agustus sampai dengan tanggal 29 September 2020. Penelitian ini menggunakan citra Landsat 8 dengan komposit band 573 (RGB). Metode pemetaan klasifikasi Supervised Maximum Likelihood digunakan untuk mendapatkan hasil kawasan hutan mangrove dan selanjutnya dianalisis menggunakan software ENVI 5.1 dan ArcGIS 10.3. Dari analisis data diketahui luas hutan mangrove pada Kawasan CMC Tiga Warna adalah seluas ± 51,5 ha dari total luasan wilayah konservasi hutan mangrove CMC Tiga Warna yaitu 74,59 ha dan spesies yang ditemukan terdapat 16 spesies mangrove di Clungup Barat 1 yaitu Achantus ilicifolius, Aegisceras floridum, Bruguiera cylindrical, Bruguiera gymnorhiza, Ceriops tagal, Clerodendrum inerme, Derris trifoliata, Excoecaria agallocha, Hibiscus tiliaceus, Ipomoea pes-caprae, Lumnitzera littorea, Rhizopora apiculata, Sonneratia alba, Thespesia populnea, Xylocarpus granatum, dan Xylocarpus rumphii. Indeks Nilai Penting yang tertinggi yaitu 126,27% pada spesies Ceriops tagal. INP terendah yaitu dengan nilai 2,39% pada spesies Clerodendrum inerme. Hasil penelitian ini diharapkan dapat memberikan kontribusi pada usaha konservasi  dan pengembangan eduwisata yang berkelanjutan di CMC Tiga Warna. Mangroves are plants that live on tidal shorelines, the zoning of mangroves has various variations at different locations, determined by soil type, depth and period of inundation, salinity and resistance to waves and currents. The purpose of this study was to determine the distribution and extent of mangrove forests in CMC Tiga Warna using Landsat 8 satellite imagery. The study was conducted from 3 August to 29 September 2020. This study used Landsat 8 imagery with a composite band 573 (RGB). The method of mapping the Supervised Maximum Likelihood classification was used to obtain the results of mangrove forest areas and then analyzed using ENVI 5.1 and ArcGIS 10.3 software. From the data analysis, it is known that the mangrove forest area in the CMC Tiga Warna area is ± 51.5 ha of the total area of the CMC Tiga Warna mangrove forest conservation area, which is 74,59 ha and the species found are 16 mangrove species in West Clungup 1 Achantus ilicifolius, Aegisceras floridum, Bruguiera cylindrical, Bruguiera gymnorhiza, Ceriops tagal, Clerodendrum inerme, Derris trifoliata, Excoecaria agallocha, Hibiscus tiliaceus, Ipomoea pes-caprae, Lumnitzera littorea, Rhizopora apiculata, Sonneratia alba, Thespesia populnea, Xylocarpus granatum, dan Xylocarpus rumphii. The highest Importance Value Index is 126.27% in the Ceriops tagal species. The lowest IVI value is 2.39% in the Clerodendrum inerme species. The results of this study are expected to contribute to conservation efforts and the development of sustainable education at CMC Tiga Warna

oai:ojs.ejournal.undip.ac.id:article/67297 2026-02-11T04:53:31Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/67297 2026-02-11T04:53:31Z Buletin Oseanografi Marina Vol 14, No 1 (2025): Buletin Oseanografi Marina; 157-166 Wijdanisa, Rahma; Program Studi Perikanan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran Arief, Mochamad Candra Wirawan; Departemen Perikanan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran Nurruhwati, Isni; Departemen Perikanan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran Ismail, Mochamad Rudyansyah; Departemen Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran 2025-02-20 16:22:43 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/67297 pesisir; lingkungan; sampah laut; konservasi id Sampah plastik banyak dijumpai di berbagai wilayah pesisir, terbawa oleh gelombang arus dan pasang surut, serta kontribusi aktivitas daratan melalui sungai yang bermuara di laut. Ekosistem pesisir yang saat ini mengalami dampak peningkatan sampah plastik antara lain terumbu karang, padang lamun, pantai dan ekosistem mangrove. Ekosistem mangrove menjadi wilayah dengan ancaman akumulasi sampah makroplastik dengan jumlah sangat banyak dari berbagai aktivitas. Kawasan mangrove Karangsong di Kabupaten Indramayu merupakan ekosistem mangrove yang memiliki fungsi dan dikelola sebagai kawasan ekowisata. Riset ini bertujuan untuk mengetahui komposisi jenis dan kepadatan makroplastik di kawasan ekowisata Mangrove Karangsong. Penelitian menggunakan metode survei dengan plot transek 10 x 10 m2 secara stratified random sampling. Hasil penelitian ini menunjukkan makroplastik terbanyak merupakan jenis Polyethylene Terephthalate (PETE) sebesar 33,47% dengan kepadatan 5,43 potong/m2, sementara makroplastik paling sedikit dijumpai pada jenis Polyvinyl Chloride (PVC) sebesar 0,15% dengan kepadatan 0,01 potong/m2. Sebaran sampah makroplastik yang ditemukan umumnya terkumpul tersangkut pada sistem perakaran mangrove dan tertutup substrat sedimen. Jenis makroplastik yang ditemukan, mengindikasikan pentingnya pengelolaan sampah di kawasan ekowisata maupun dari sumber utama penghasil. 

oai:ojs.ejournal.undip.ac.id:article/16555 2020-04-17T12:04:24Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/16555 2020-04-17T12:04:24Z Buletin Oseanografi Marina Vol 6, No 2 (2017): Buletin Oseanografi Marina; 110-116 Ridlo, Ali; Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Pramesti, Rini; Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Koesoemadji, Koesoemadji; Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Supriyantini, Endang; Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Soenardjo, Nirwani; Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2017-11-18 00:38:56 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/16555 Rhizopora mucronata; Antioxidant; DPPH id Rhizopora mucronata merupakan salah satu jenis mangrove yang berpotensi  sebagai sumber antioksidan alami. Daun tanaman ini mengandung senyawa metabolit sekunder seperti tanin, fenolat, klorofil, karotenoid dan alkaloid. Penelitian ini bertujuan menentukan aktivitas antioksidan ekstrak daun R. mucronata. Sampel diambil dari kawasan mangrove Tugurejo, Semarang dan diekstraksi  secara bertingkat berturut-turut dengan pelarut n-heksana, etil asetat dan metanol. Aktivitas antioksidan diukur dengan metode DPPH (1,1-diphenyl-2-picrylhidrazyl) dan nilainya ditentukan berdasarkan nilai Inhibitory Concentration (IC50)pada panjang gelombang 516,5 nm. Kadar senyawa fenolat total ditentukan secara spektrofotometri pada panjang gelombang 725 nm dengan metode Folin-Ciocalteu, kadar klorofil a dan b ditentukan dengan metode spektrofotometri pada panjang gelombang 663 nm dan 645 nm dan kadar karotenoid diukur pada 480 nm. Hasil penelitian menunjukkan ekstrak metanol memiliki nilai IC50terkecil (113,41  ppm), diikuti ekstrak n-heksana 151,13 ppm dan ekstrak etil asetat 184,78 ppm. Kandungan total fenolat tertinggi terdapat pada ekstrak metanol yaitu 21,06 mg GAE/g sampel, ekstrak n-heksana 13,27 mg GAE/g sampel dan ekstrak etil asetat 2,08 mg GAE/g sampel. Kandungan klorofil a tertinggi terdapat pada ekstrak metanol yaitu 2,304  mg/g, diikuti ekstrak n-heksana 0,705 mg/g dan ekstrak etil asetat 0,64 mg/g. Kandungan klorofil b tertinggi dicapai ekstrak metanol yaitu 0,97 mg/g, ekstrak n-heksana 0,50 mgg dan ekstrak etil asetat 0,13 mg/g. Kandungan karotenoid tertinggi dicapai pada ekstrak metanol yaitu 6,49 mg GAE/g, diikuti ekstrak etil asetat (0.54 mg GAE/g) dan ekstrak n-heksana (1,37 mg GAE/g). Ekstrak metanol memiliki aktivitas antioksidan tertinggi dan termasuk dalam antioksidan kategori sedang, sedangkan ekstrak etil asetat dan  n-heksana termasuk dalam  antioksidan kategori lemah.   Rhizopora mucronata is one type of mangrove that has the potential as a source of natural antioxidants. The leaves of this plant contain secondary metabolite compounds such as tannins, phenolics, chlorophyll, carotenoids and alkaloids. This study aims to determine the antioxidant activity of R. mucronata leaf extract. Samples were taken from Tugurejo mangrove area, Semarang and extracted successively with n-hexane, ethyl acetate and methanol solvent. Antioxidant activity was measured by DPPH (1,1-diphenyl-2-picrylhidrazyl) method and its value was determined based on Inhibitory Concentration (IC50) value at 516,5 nm wavelength. Total phenolic compound concentration was determined spectrophotometrically at 725 nm wavelength with Folin-Ciocalteu method. The levels of chlorophyll a and b was determined by spectrofotometry method at 663 nm and 645 nm wavelength and carotenoid levels were measured at 480 nm. The results showed that methanol extract had the smallest IC50 value (113,41 ppm), followed by n-hexane extract 151,13 ppm and ethyl acetate extract 184,78 ppm. The highest total phenolic content was found in methanol extract, 21.06 mg GAE / g sample, n-hexane extract 13,27 mg GAE / g sample and ethyl acetate extract 2.08 mg GAE / g sample. The highest content of chlorophyll a contained in methanol extract is 2,304 mg / g, followed by n-hexane extract 0,705 mg / g and ethyl acetate extract 0,64 mg / g. The highest content of chlorophyll b was methanol extract of 0.97 mg / g, n-hexane extract 0,50 mgg and ethyl acetate extract 0,13 mg / g. The highest carotenoid content was achieved in the methanol extract of 6.49 mg GAE / g, followed by ethyl acetate extract (0.54 mg GAE / g) and n-hexane extract (1.37 mg GAE / g). Methanol extract has the highest antioxidant activity and is included in medium category antioxidants, while ethyl acetate and n-hexane extracts are included in weak category antioxidants. 

oai:ojs.ejournal.undip.ac.id:article/44100 2023-01-25T06:05:53Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/44100 2023-01-25T06:05:53Z Buletin Oseanografi Marina Vol 11, No 3 (2022): Buletin Oseanografi Marina; 330-346 Yasra, Ezikri; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Ismunarti, Dwi Haryo; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Pranowo, Widodo Setiyo; Pusat Riset Kelautan, Badan Riset dan Sumber Daya Manusia, Kementerian Kelautan dan Perikanan Republik Indonesia Program Studi Hidrografi, Sekolah Tinggi Teknologi Angkatan Laut Setiyadi, Johar; Program Studi Hidrografi, Sekolah Tinggi Teknologi Angkatan Laut 2022-10-01 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/44100 Barotropik; Hidrodinamika 3D; Kepulauan Sula; Kepulauan Taliabu id Perairan Kepulauan Sula dan Taliabu merupakan perairan yang memisahkan dua laut dalam di bagian utara dan selatan kepulauan, Laut Maluku dan Laut Banda, dengan tiga pulau besar utama yaitu Pulau Mangoli, Pulau Taliabu, dan Pulau Sanana. Perairan tersebut memiliki dinamika yang kompleks dengan topografi dasar perairan yang tidak teratur dan adanya sill pada kolom perairan serta dilintasi oleh Arus Lintas Indonesia (ARLINDO) pada Pintasan Lifamatola. Kompleknya dinamika perairan dengan pengaruh pasang surut yang kuat menyebabkan diperlukan suatu kajian tersendiri untuk menguraikan berbagai fenomena oseanografi yang terjadi sehingga diperoleh berbagai pemahaman baru mengenai perairan tersebut. Pendekatan numerik melalui pemodelan hidrodinamika tiga dimensi dilakukan untuk mengetahui profil oseanografi perairan. Fokus utama dilakukan pada aspek arus laut dan pasang surut dengan penyederhanaan barotropik. Penelitian dilakukan dengan menggunakan data sekunder yang diperoleh dari ERA-5, PUSHIDROSAL, MIKE DHI, dan BRSDM KKP. Hasil penelitian menunjukkan bahwa perairan Kepulauan Sula dan Taliabu memiliki karakter pasang surut Campuran Condong Harian Ganda dengan dominansi konstituen Pasut pada bagian utara kepulauan adalah K1 dan pada bagian selatan kepulauan M2. Karakteristik arus memiliki sifat yang bervariasi diantara kecepatan maksimum dan rerata. Hasil model memperlihatkan bahwa kecepatan maksimum mencapai 5,555 m/s dengan kecepatan rata-rata tertinggi 2,373 m/s. Pola arus pada saat kecepatan maksimum bergerak menuju utara sedangkan pada kecepatan rerata arus bergerak condong ke arah barat dengan pergerakan menuju selatan. The waters of the Sula and Taliabu Islands are waters that separate the two-deep seas in the northern and southern parts of the archipelago, the Maluku Sea and the Banda Sea, with three main large islands, namely Mangoli Island, Taliabu Island, and Sanana Island. These waters have complex dynamics with irregular bottom topography and sill in the water column and crossed by the Indonesian Through Flow (ARLINDO) on the Lifamatola Passage. The complexity of the dynamics of the waters with strong tidal influences requires a separate study to describe the various oceanographic phenomena that occur so that new understandings of these waters are obtained. A numerical approach through three-dimensional hydrodynamic modeling is carried out to determine the oceanographic profile of the waters. The main focus is on the aspects of ocean currents and tides with barotropic simplification. The study was conducted using secondary data obtained from ERA-5, PUSHIDROSAL, MIKE DHI, and BRSDM KKP. The results showed that the waters of the Sula and Taliabu Islands have a Mixed Tide Prevailling Semi diurnal with the predominance of the Tidal constituents in the northern part of the archipelago K1 and the southern part of the islands M2. Current characteristics vary between maximum and average speeds. The model results show that the maximum speed reaches 5,555 m/s with the highest average speed of 2,373 m/s. The current pattern at the time of maximum speed moves towards the north while at the average speed the current moves towards the west with a movement towards the south.

oai:ojs.ejournal.undip.ac.id:article/6916 2014-05-20T03:28:38Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6916 2014-05-20T03:28:38Z Buletin Oseanografi Marina Vol 1, No 5 (2012): Buletin Oseanografi Marina; 47-52 Ismunarti, Dwi Haryo; Jurusan Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan UNDIP 2012-10-10 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6916 en Model regresi logistik binomial diturunkan untuk mengetahui pengaruh toksisitas logam berat timbal Pb terhadap  peluang (p) kelulushidupan  Udang Vannamae. Pendugaan parameter model β  dengan metode memaksimumkan Likelihood fungsi peluang binom menggunakan metode numerik yaitu dengan iterasi Newton Ralphson. Keberadaan outlier dalam pembentukan model akan menurunkan ketepatan model sehingga diperlukan identifikasi keberadaannya. Kemudian model diturunkan tanpa menyertakan outlier. Berdasarkan model diperoleh bahwa hasil pada stadia yang sama setiap penambahan 1 mg/l Pb pada media akan menurunkan peluang untuk lulus hidup sebesar 23%. Pada konsentrasi Pb yang sama peluang untuk lulus hidup udang pada stadia PL 10 lebih besar 156 % dibanding pada stadia PL 5.   Kata kunci : regresi logistik binomial, odd rasio

oai:ojs.ejournal.undip.ac.id:article/77147 2026-02-11T04:57:56Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/77147 2026-02-11T04:57:56Z Buletin Oseanografi Marina Vol 15, No 1 (2026): Buletin Oseanografi Marina; 10-20 Harlianto, Budi; Program Studi Geofisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Bengkulu Hadi, Arif Ismul; Program Studi Geofisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Bengkulu Lizalidiawati, Lizalidiawati; Program Studi Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Bengkulu Azhari, M. Fikri; Program Studi Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Bengkulu 2026-02-25 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/77147 Garis Pantai; Kerentanan Seismik; Pantai Bengkulu Bagian Utara id Perubahan garis pantai dapat dikaji melalui data primer maupun sekunder, berupa data foto drone dan data citra dari satelit yang diambil pada lokasi yang sama namun waktu yang berbeda. Hasil analisa kedua data tersebut dapat mengetahui sedimentasi atau abrasi yang menggambarkan perubahan garis pantai. Perubahan garis pantai secara oseanografi diakibatkan oleh hempasan ombak laut, pasang surut, dan arus laut, jika ditinjau secara geologi perubahan garis pantai disebabkan oleh pengaruh kerentanan seismik atau faktor site seperti penyusun pantai dengan struktur lapisan bawah permukaan yang berbeda. Tujuan penelitian ini untuk menganalisa struktur tersebut melalui nilai Kerentanan Seismik (Kg), PGA (α) dan GSS (γ) yang diperoleh dari pengolahan data mikrotremor. Pengambilan foto drone dilakukan pada 2 lokasi yang setiap lokasinya dilakukan pengukuran data mikrotremor sebanyak 4 titik (durasi 30 menit). Berdasarkan data primer (foto drone) pada tahun 2018 dan 2020 di pantai Bengkulu Bagian Utara terjadi abrasi yang tergolong tinggi dan sedimentasi yang tergolong rendah. Hasil analisis data penelitian ini memperlihatkan laju perubahan garis pantai yang tertinggi pada pantai Serangai 1,49 m/th dan yang terendah terjadi pada Pantai Ketahun 1,46 m/th. Nilai Kg berkisar antara 0,32 sampai 4,76, nilai GSS berkisar 1x10-4, dan nilai α berkisar 93,39 – 236,32 gal. Area yang mengalami perubahan garis Pantai yang tinggi menunjukkan nilai Kg yang relatif tinggi, yaitu mendekati 2,781, serta nilai α tertinggi mencapai 236,32 gal, nilai-nilai tersebut menunjukkan potensi guncangan seismik yang kuat sehingga mudah mengalami abrasi.  Shoreline changes can be studied through primary and secondary data, including drone photography and satellite imagery taken at the same location but at different times. Analysis of these two data sets can reveal sedimentation or abrasion, which reflect shoreline changes. Oceanographically, shoreline changes are caused by the pounding of ocean waves, tides, and ocean currents. Geologically, shoreline changes are caused by the influence of seismic vulnerability or site factors, such as different subsurface structures in coastal structures. The purpose of this study is to analyze these structures through Seismic Vulnerability (Kg), PGA (α) and GSS (γ) values obtained from microtremor data processing. Drone photos were taken at 2 locations, each location with 4 microtremor data measurements (duration 30 minutes). Based on primary data (drone photos) in 2018 and 2020 on the coast of North Bengkulu, abrasion occurred which was classified as high and sedimentation which was classified as low. The results of the data analysis of this study show that the highest rate of shoreline change is at Serangai Beach at 1.49 m/yr, while the lowest is at Ketahun Beach at 1.46 m/yr. The Kg value ranges from 0.32 to 4.76, the GSS value ranges from 1x10-4, and the α value ranges from 93.39 to 236.32 gal. Areas experiencing high shoreline changes show a relatively high Kg value, which is close to 2.781, and the highest α value reaches 236.32 gal, these values indicate the potential for strong seismic shocks so that they are easily abrasion.

oai:ojs.ejournal.undip.ac.id:article/22264 2020-04-25T06:17:21Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/22264 2020-04-25T06:17:21Z Buletin Oseanografi Marina Vol 8, No 1 (2019): Buletin Oseanografi Marina; 49-54 Tanjung, Rosye Hefmi Rechnelty; Department of Biology, Universitas Cenderawasih Hamuna, Baigo; Department of Marine Science and Fisheries, Universitas Cenderawasih Alianto, Alianto; Department of Fisheries, Universitas Papua 2019-04-19 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/22264 mutu perairan; surfaktan; minyak; perairan Depapre; Papua en Kondisi kualitas air suatu perairan yang baik sangat penting untuk mendukung kehidupan organisme yang hidup di dalamnya. Penentuan status mutu air perlu dilakukan sebagai acuan dalam melakukan pemantauan pencemaran kualitas air. Penelitian ini bertujuan untuk mengkaji status mutu air laut berdasarkan konsentrasi parameter surfaktan dan minyak di perairan Distrik Depapre, Kabupaten Jayapura. Pengambilan sampel air laut dilakukan di lima stasiun penelitian, kemudian hasilnya dibandingkan dengan baku mutu air laut untuk biota laut berdasarkan KEPMEN-LH No. 51 Tahun 2004. Hasil penelitian menunjukkan bahwa konsentrasi surfaktan di perairan Distrik Depapre berkisar antara 0,08–0,22 mg/L, sedangkan konsentrasi kandungan minyak berkisar antara 0,14–0,41 mg/L. Berdasarkan baku mutu air laut, konsentrasi surfaktan dan minyak belum melampaui baku mutu dan masih sesuai untuk biota laut di perairan Depapre, Kabupaten Jayapura. Hasil penelitian ini memberikan informasi bahwa kondisi perairan Depapre belum tercemar oleh limbah surfaktan dan minyak. Namun tidak menutup kemungkinan bahwa konsentrasi tersebut dapat terus meningkat, sehingga perlu upaya lebih lanjut dari pemerintah dan masyarakat untuk meminimalkan jumlah limbah surfaktan dan minyak yang masuk kelingkungan perairan laut. Good water quality is critical to support the life of organisms. The determination of water quality status was needed as a reference to monitor water pollution. This study aimed to assess the condition of water quality based on the concentration of surfactant and oil parameters in the Depapre waters, Jayapura Regency. Sampling was carried out in five research stations; then the results were compared with water quality standards based on KEPMEN-LH No. 51 Tahun 2004 for marine biotas. The result showed that the concentration of surfactant in Depapre waters was 0.08–0.22 mg/L, while the oil concentration was 0.14–0.41 mg/L. Based on water quality standards, surfactant and oil concentration has not exceeded the quality standards and are suitable for marine biotas in Depapre waters, Jayapura Regency. Results showed the condition of  Depapre waters had not been polluted by surfactant and oil waste. However, it does not rule out the possibility that the concentration can increase so that it needs further efforts from the government and the community to minimize the amount of surfactant and oil waste entering the marine environment.

oai:ojs.ejournal.undip.ac.id:article/49798 2023-06-20T04:50:15Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/49798 2023-06-20T04:50:15Z Buletin Oseanografi Marina Vol 12, No 2 (2023): Buletin Oseanografi Marina; 278-289 Handoyo, Gentur; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro, Sugianto, Denny Nugroho; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro, Erfando, Wahyu; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro, Utomo, Muh Fadli Wahyu; Program Studi Ekonomi Islam, Fakultas Ekonomika dan Bisnis, Universitas Diponegoro, Aliandu, Richardus Ade Satria; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro, Hidayat, Kurnia Fajar; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro, 2023-06-20 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/49798 Studi Kelayakan; Ekonomi; Wisata; SWOT id Sektor pariwisata menjadi salah satu sektor unggulan bagi perekonomian Indonesia. Sebagai negara maritim Indonesia memiliki potensi besar pengembangan ekonomi di dalamnya. Provinsi Jawa Tengah sebagai salah satu provinsi dengan potensi wisata yang tinggi memiliki beberapa permasalahan tersendiri khususnya pada daerah pesisir. Permasalahan abrasi menjadi salah satu pengambat utama bagi pengembangan potensi ekonomi dari kawasan pesisir. Abrasi terbukti telah mengubah pola interaksi di masyarkat yang berimplikasi pada perubahan mata pencaharian dari masyarakat pesisir. Sebagai salah satu pantai dengan potensi wisata, Pantai Seribu Ranting Kabupaten Jepara menghadapi permasalahan abrasi dan juga sedimentasi. Fenomena ini dikhawatirkan akan menjadi permasalahan tersendiri bagi masyarakat dalam mengembangan potensi wisata di dalamnya. Penelitian ini bertujuan untuk menganalisis kelayakan kondisi fisik lingkungan dan ekonomi dari Pantai Seribu Ranting sebagai salah satu destinasi wisata edukasi. Metode yang digunakan dalam penelitian ini adalah dengan mengukur kelayakan fisik menggunakan Indeks Kesesuaian Wisata dan kelayakan ekonomi dengan menganalisis faktor internal dan eksternal menggunakan analisa SWOT. Hasil pengukuran Indeks Kesesuaian Wisata menunjukkan nilai sebesar >60% sehingga kawasan Pantai Seribu Ranting sesuai menjadi kawasan wisata. Temuan ini didukung dengan hasil analisis SWOT yang menunjukkan strategi terbaik bagi Pantai Seribu Ranting adalah dengan menggunakan strategi pertumbuhan.    The tourism sector is one of the leading sectors of the Indonesian economy. As a maritime country, Indonesia has great potential for economic development in it. Central Java Province as one of the provinces with high tourism potential has several problems, especially in coastal areas. The problem of abrasion is one of the main obstacles to the development of the economic potential of coastal areas. Abrasion is proven to have changed the pattern of interaction in the community which has implications for changes in the livelihoods of coastal communities. As one of the beaches with tourism potential, Seribu Twig Beach, Jepara Regency is facing abrasion and sedimentation problems. This phenomenon is feared to be a separate problem for the community in developing tourism potential in it. This study aims to analyze the feasibility of the physical, environmental and economic conditions of thousand Branch Beach as a tourist destdestination educatione method used in this study is to measure physical feasibility using the Tourism Suitability Index and economic feasibility by analyzing internal and external factors using SWOT analysis. The results of the measurement of the Tourism Suitability Index show a value of >60% so tha coastal area of a thousand branches is suitable to be a tourist area. This finding is supported by the results of a SWOT analysis which shows that the best strategy for a thousand twigs beach is to use a growth strategy.

oai:ojs.ejournal.undip.ac.id:article/31740 2021-02-01T08:06:19Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/31740 2021-02-01T08:06:19Z Buletin Oseanografi Marina Vol 9, No 2 (2020): Buletin Oseanografi Marina; 93-103 Suryanti, Suryanti; Departemen Sumberdaya Akuatik, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Fatimah, Prasasti Nusa Pertiwi Nur; Departemen Sumberdaya Akuatik, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Rudiyanti, Siti; Departemen Sumberdaya Akuatik, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2020-10-15 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/31740 Bulu babi; Morfologi; Anatomi; Parameter lingkungan; Pantai Sepanjang id Pantai Sepanjang memiliki karakteristik pantai dengan substrat berupa pasir dan hamparan karang mati yang banyak ditumbuhi makroalga, merupakan habitat berbagai jenis biota, salah satunya bulu babi. Biota tersebut memiliki fungsi ekologi sebagai pemakan detritus dan pengendali populasi makroalga di ekosistem terumbu karang. Tujuan penelitian ini untuk mengetahui jenis, morfologi, anatomi, dan kelimpahan bulu babi serta hubungannya dengan parameter lingkungan. Penelitian dilaksanakan pada bulan November 2019 di Pantai Sepanjang, Kabupaten Gunungkidul. Metode sampling menggunakan stratified random sampling dengan membagi lokasi pengamatan menjadi 3 stasiun (A, B, C) berdasarkan perbedaan tutupan substrat dasar perairan. Pengamatan dilakukan terhadap jenis, morfologi, anatomi, kelimpahan dan parameter lingkungan. Hasil penelitian ditemukan 6 jenis Bulu Babi yaitu Echinometra mathaei, Echinometra oblonga, Echinothrix calamaris, Heterocentrotus trigonarius, Diadema setosum dan Stomopneustes variolaris. Enam Jenis Bulu Babi tersebut memiliki karakteristik morfologi dan anatomi yang berbeda. Kelimpahan bulu babi pada stasiun A sebesar 474 ind/ 15m2, stasiun B sebesar 611 ind/ 15m2 dan stasiun C sebesar 81 ind/ 15m2. Berdasarkan Uji korelasi  menunjukkan bahan organik sedimen berkorelasi positif, sedangkan tekstur sedimen, suhu, salinitas berkorelasi negatif  dengan kelimpahan bulu babi. Sepanjang Beach has the characteristics of sand substrates and covered by dead corals, which are overgrown by macroalgae, and is a habitat for various types of biota, one of them sea urchins. This biota has an ecological function as a detritus feeder and macroalgae population controller in a coral reef ecosystem. The aims of the study is to determine the type, morphology, anatomy, and the linkage between the abundance of sea urchins to environmental parameters. The study was conducted in November 2019 at Sepanjang Beach, Gunungkidul Regency. The stratified random sampling was applied as sampling method, by dividing the observation location into 3 stations (A, B, C) based on the difference coverage of substrate. The observation covers the type, morphology, anatomy, abundance, and the environmental parameter. There were 6 sea urchins species namely Echinometra mathaei, Echinometra oblonga, Echinothrix calamaris, Heterocentrotus trigonarius, Diadema setosum and Stomopneustes variolaris, which have different characteristics of morphology and anatomy. The abundance of sea urchins at station A is 474 ind/ 15m2, station B is 611 ind/ 15m2, and station C is 81 ind/ 15m2. The sediment organic material and the abundance of sea urchins showed a significant correlation, while sediment texture, temperature, salinity have an insignificant correlation to the abundance of sea urchins.

oai:ojs.ejournal.undip.ac.id:article/59218 2024-05-31T07:50:39Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/59218 2024-05-31T07:50:39Z Buletin Oseanografi Marina Vol 13, No 1 (2024): Buletin Oseanografi Marina; 107-112 Khairunnisa, Khairunnisa; Department of Marine Science, Faculty of Fisheries and Marine Science, Universitas Diponegoro Hartati, Retno; Department of Marine Science, Faculty of Fisheries and Marine Science, Universitas Diponegoro Widowati, Ita; Department of Marine Science, Faculty of Fisheries and Marine Science, Universitas Diponegoro 2024-02-06 14:07:59 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/59218 microalgae; functional food; pigment en Chlorella vulgaris is a green microalga (Chlorophyta) known to produce chlorophyll pigment as its primary pigment. Chlorophyll is known for its health benefits because it helps heal wounds and prevent hemophilia and diabetes and asthma. Chlorophyll is one of the pigments targeted as a functional food source. One of the environmental parameters that can affect chlorophyll content is the presence of light. This study aims to determine the effect of differences in light intensity on the chlorophyll content of C. vulgaris. The method used in this research is experimental, conducted in the laboratory using a completely randomized design (RAL). ANOVA is the statistical analysis used to analyze the effect of light intensity on chlorophyll content in C. vulgaris. C. vulgaris was cultivated with three different light intensity treatments, namely 1500, 3000, and 4500 lux, with three repetitions each. The growth of C. vulgaris was observed for 8 x 24 hours and then harvested by centrifugation on the eighth day to obtain the wet biomass. Cultivation wet biomass was extracted using acetone PA solvent. The acetone extract of C. vulgaris was analyzed for its chlorophyll pigment content using a spectrophotometer at 645 and 663 nm absorbance. The highest content of chlorophyll-a, b, and chlorophyll produced at a light intensity of 1500 lux was 26.2, 48.5, and 74.7 µg/ml, respectively. According to the results of statistical analysis, it can be concluded that different light-intensity treatments did not show a significant effect (p>0.05) on the content of chlorophyll-a, b, and total chlorophyll in C. vulgaris.

oai:ojs.ejournal.undip.ac.id:article/11167 2016-05-31T02:46:26Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/11167 2016-05-31T02:46:26Z Buletin Oseanografi Marina Vol 2, No 4 (2013): Buletin Oseanografi Marina; 9-17 Rachmawati, Diana; Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/11167 en Sumber protein hewani pakan buatan saat ini masih bergantung pada tepung ikan.  Tepung ikan yang memiliki kualitas baik dan murah saat ini semakin sulit untuk diperoleh untuk menekan biaya pakan.  Sumber bahan baku protein hewani yang lain diperlukan untuk dapat mengganti  tepung ikan dalam pakan buatan.  Salah satu bahan lokal dapat dijadikan sebagai   alternatif sumber protein hewani pakan buatan adalah tepung cacing (L. rubellus). Tujuan penelitian ini untuk mengkaji pengaruh substitusi tepung ikan dengan tepung cacing tanah (L rubellus) terhadap laju pertumbuhan relatif dan kelulushidupan kerapu macan (E. fuscoguttatus) dan menentukan dosis terbaik substitusi tepung ikan dengan tepung cacing tanah (L. rubellus) terhadap  laju pertumbuhan rrelatif dan kelulushidupan kerapu macan (E. fuscoguttatus).  Kerapu macan untuk penelitian ini memiliki bobot rata-rata 2,8  ± 0,05 g.ekor -1 dengan kepadatan 1 ekor.liter-1. Pakan penelitian  berupa pakan buatan berbentuk  pellet dengan substitusi tepung ikan dengan tepung cacing tanah sebesar 0%, 25%, 50%, dan 75%. Pemberian pakan kerapu macan menggunakan metode at satiation dan  kerapu macan dipelihara selama 42 hari. Hasil penelitian menunjukkan bahwa pakan buatan dengan substitusi tepung ikan dengan tepung cacing tanah berpengaruh nyata (P<0,05) terhadap  laju pertumbuhan relatif dan tidak berpengaruh  nyata (P>0,05) terhadap terhadap kelulushidupan Kerapu Macan . Hasil ini menunjukkan bahwa substitusi tepung ikan dengan tepung cacing tanah sebesar 25% merupakan dosis terbaik untuk laju pertumbuhan relatif kerapu macan.   Kata-kata kunci : Kerapu macan, Substitusi, Pakan buatan, Laju pertumbuhan relatif, Kelulushidupan

oai:ojs.ejournal.undip.ac.id:article/37930 2021-09-19T19:04:11Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/37930 2021-09-19T19:04:11Z Buletin Oseanografi Marina Vol 10, No 3 (2021): Buletin Oseanografi Marina; 251-258 Senduk, Juwita Lesly; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Suprijanto, Jusup; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Ridlo, Ali; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2021-09-20 02:02:03 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/37930 Mikroplastik; Ikan; TPI; Semarang; Kendal id Mikroplastik merupakan partikel plastik yang berukuran ≤5 mm. Ukurannya yang kecil menyebabkannya dapat tertransportasikan ke seluruh tempat dan biota termasuk ikan. Ikan pelagis jenis ikan kembung dan ikan selar merupakan salah satu biota laut bernilai ekonomis tinggi dan banyak dikonsumsi masyarakat. Penelitian ini bertujuan untuk mengetahui kandungan mikroplastik pada ikan kembung dan ikan selar. Metode penelitian yang digunakan adalah deskriptif kualitatif. Sampel ikan kembung diambil di TPI Tambak Lorok Semarang, sedangkan ikan selar diambil dari TPI Tawang Rowosari Kendal. Penelitian ini dilakukan  pada bulan Juni–Desember 2020. Tahapan penelitian yang dilakukan yaitu dimulai dengan pengambilan sampel, pengukuran sampel, pembedahan sampel, pelarutan sampel, pemisahan partikel mikroplastik, penyaringan partikel, dan identifikasi langsung secara visual menggunakan mikroskop. Hasil penelitian menunjukkan bahwa terdapat mikroplastik pada ikan selar dan kembung di TPI Semarang dan Kendal. Mikroplastik paling banyak dengan rerata 25,2 partikel pada insang dan 19,1 partikel pada pencernaan ditemukan pada ikan kembung di TPI Tambak Lorok, pada ikan selar (Selaroides leptolepis) ditemukan rerata 10,1 partikel pada insang dan 8,4 partikel pada pencernaan. Hasil yang didapatkan ditemukan bentuk fiber, fragmen, pelet, dan film, dengan warna yang beragam yaitu hitam, coklat, biru, putih, merah, transparan, dan kuning.  Microplastics are plastic particles with a size of 5 mm. Its small size causes it easy to be transported to all places, including fish. Pelagic fish species of mackerel and selar fish are one of the marine biota that are economically feasible and widely consumed by the public. This study aims to determine the content of microplastics in mackerel and selar fish. The research method used is descriptive qualitative. Mackerel fish samples were taken at TPI Tambak Lorok Semarang, while selar fish were taken from TPI Tawang Rowosari Kendal. This research was conducted in June – December 2020. The stages of the research carried out were starting with sampling, measuring samples, separating samples, separating microplastic particles, evaluating particles, and directly using a microscope. The results showed that there were microplastics in selar and mackerel in TPI Semarang and Kendal. The most microplastics with an average of 25.2 particles in the gills and 19.1 particles in the digestion were found in mackerel at TPI Tambak Lorok, in selar fish (Selaroides leptolepis) an average of 10.1 particles were found in the gills and 8.4 particles in digestion. The results obtained were found in the form of fibers, fragments, pellets, and films, with various colors, namely black, brown, blue, white, red, transparent, and yellow.

oai:ojs.ejournal.undip.ac.id:article/64699 2026-02-11T04:53:31Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/64699 2026-02-11T04:53:31Z Buletin Oseanografi Marina Vol 14, No 1 (2025): Buletin Oseanografi Marina; 1-12 Purba, Sindi Krisanti; Program Studi Ilmu Kelautan, Fakultas Kelautan dan Perikanan, Universitas Udayana Indrawan, Gede Surya; Program Studi Ilmu Kelautan, Fakultas Kelautan dan Perikanan, Universitas Udayana Suteja, Yulianto; Program Studi Ilmu Kelautan, Fakultas Kelautan dan Perikanan, Universitas Udayana 2025-02-20 05:07:24 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/64699 Perancak; Makrozoobentos; Mangrove; PCA id Ekosistem mangrove memainkan peran penting dalam mendukung kehidupan akuatik, sebagai sumber makanan, tempat pembesaran dan tempat pemijahan bagi berbagai organisme akuatik. Kondisi lingkungan mangrove sangat memengaruhi keberadaan biota perairan, terutama makrozoobentos. Penelitian ini dilakukan untuk mengetahui kelimpahan makrozoobentos, kondisi kerapatan mangrove, serta hubungan parameter lingkungan dan kerapatan mangrove dengan kelimpahan makrozoobentos menggunakan pendekatan Principal Component Analysis (PCA). Penelitian ini dilakukan pada bulan Oktober 2023 di ekosistem mangrove Perancak, Jembrana, Bali dengan pengambilan sampel di tiga jenis habitat mangrove: mangrove alami, restorasi, dan campuran. Data mangrove dikumpulkan menggunakan transek berukuran 10x10m2, adapun pengambilan data makrozoobentos menggunakan transek 1x1m2.. Hasil pengukuran kualitas air menunjukkan suhu berkisar antara 28,67-30,87OC, pH 6,25-6,45, salinitas 27,78-30,89‰, oksigen terlarut 2,15-2,81 mg/L dan kadar nitrat 0,49-0,97 mg/L. Nilai tersebut menunjukkan bahwa kondisi kualitas air pada lokasi penelitian dalam kondisi baik dan mendukung pertumbuhan makrozoobentos. Selain itu, tekstur sedimen didominasi oleh substrat lempung liat berdebu. Makrozoobentos yang ditemukan terdiri dari 15 spesies dari 10 famili dan 3 kelas yaitu Gastropoda, Polychaeta, dan Malacostraca. Kelimpahan makrozoobentos berkisar antara 12,87-16,3ind/m2, sedangkan kerapatan mangrove berada pada kategori sangat padat dengan nilai antara 2300-3566 ind/ha. Indeks keanekaragaman 1,52-2,31, indeks keseragaman 0,78-0,9, dan indeks dominansi 0,12-0,29. Nilai indeks ekologi ini menunjukkan bahwa makrozoobentos berada dalam kondisi seimbang. Berdasarkan hasil analisis PCA, kelimpahan memiliki korelasi positif dengan variabel kerapatan mangrove, suhu, oksigen terlarut (DO), dan pH. 

oai:ojs.ejournal.undip.ac.id:article/15737 2020-04-17T12:03:31Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/15737 2020-04-17T12:03:31Z Buletin Oseanografi Marina Vol 6, No 1 (2017): Buletin Oseanografi Marina; 17-23 Satriadi, Alfi; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Prayogi, Harmon; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2017-08-28 16:35:22 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/15737 Tinggi dan Periode Gelombang Signifikan; Metode SMB; Perairan Semarang id Gelombang menjalar dari perairan dalam menuju perairan dangkal. Penjalaran gelombang merupakan bentuk dari adanya gangguan pada suatu medium, dalam hal ini medium air. Salah satu bentuk dari gangguan tersebut adalah gaya gesek angin. Sehingga arah dan kecepatan angin dapat digunakan untuk menentukan tinggi dan periode gelombang yang dihasilkan. Metode Sverdrup, Munk, dan Bretschneider (SMB) digunakan dalam penelitian ini untuk menentukan tinggi dan periode gelombang signifikan di perairan dangkal khususnya perairan Semarang. Data angin yang digunakan untuk meramalkan tinggi dan periode gelombang diperoleh dari European Centre for Medium-Range Weather Forecasts (ECMWF) selama 10 tahun (2007-2016). Koreksi durasi dilakukan untuk mendapatan data angin rata-rata setiap jam. Selanjutnya melakukan koreksi stabilitas dan menentukan nilai wind stress factor dimana nilai ini, fetch efektif, dan kedalaman perairan digunakan untuk mendapatkan nilai tinggi dan periode gelombang signifikan. Hasil penelitian menunjukan arah angin dominan pada musim Timur, musim Peralihan II, dan musim Barat menuju ke arah Tenggara. Sedangkan arah angin dominan pada musim Peralihan I menuju ke arah Selatan. Musim Barat memiliki variasi kecepatan angin lebih tinggi dari ketiga musim lainnya. Demikian pula, tinggi dan periode gelombang signifikan pada musim Barat adalah tertinggi dengan nilai 1,227 meter dan 5,175 detik. Sebaliknya, pada musim Peralihan II memiliki tinggi dan periode gelombang signifikan terendah dengan nilai 0,577 meter dan 3,391 detik. Tinggi dan periode gelombang signifikan di perairan Semarang sangat dipengaruhi oleh angin muson. Ocean waves propagation from depth water into shallow water has been becoming important aspect to determine waves characteristic. In particular, waves is manifestation of energy, such as wind stress in this case, that is transferred into a medium. Moreover, wind speed and direction can be used to predict significant wave height and period.Sverdrup, Munk, and Bretschneider (SMB) method are employed to predict significant wave height and period at Semarang waters. This method is based on wind data, speed and direction, to forecast where the data used in this research were collected from European Centre for Medium-Range Weather Forecasts (ECMWF) from 2007 to 2016. Data Corrections were applied in this research including duration and stability correction. As a result, from this correction, wind stress factor was established to compute significant wave height and period. The result showed that in East season, First Transitional season, and West season, wind direction was dominated from the Southeast. Differently, wind blew to the South dominated in Second Transitional season. West season had significantly high wind speed variation compared to other seasons. In addition, It had 1,227 meter of significant wave height and 5,175 second of significant wave period. On the contrary, Second Transitional season had lowest significant wave height and periods, 0,577 meter and 3,391 second respectively.

oai:ojs.ejournal.undip.ac.id:article/40004 2022-09-07T17:08:50Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/40004 2022-09-07T17:08:50Z Buletin Oseanografi Marina Vol 11, No 2 (2022): Buletin Oseanografi Marina; 221-230 Nugraheni, Anisa Dewi; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Zainuri, Muhammad; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Wirasatriya, Anindya; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Maslukah, Lilik; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2022-06-01 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/40004 klorofil-a; fitoplankton; sebaran arus id Peningkatan jumlah penduduk akan mengakibatkan dampak negatif terhadap keseimbangan ekosistem di kawasan perairan yang disebabkan limbah dari aktifitas manusia. Kesuburan perairan dapat ditentukan berdasarkan indikator keberadaan fitoplankton. Fitoplankton mempunyai siklus hidup yang pendek oleh karena itu responnya cepat terhadap perubahan lingkungan. Penentuan keberadaan fitoplankton bisa menggunakan konsentrasi klorofil-a, karena merupakan pigmen yang selalu ditemukan dalam fitoplankton dan merupakan pigmen yang terlibat langsung dalam proses fotosintesis. Penelitian ini bertujuan untuk mengetahui sebaran klorofil-a secara horizontal dan mengetahui kondisi kualitas perairan Muara Sungai Jajar, Demak. Penelitian menggunakan metode kuantitatif dengan penentuan lokasi pada sembilan (9) titik sampling yang ditentukan secara purposive. Parameter penelitian yang diamati meliputi konsentrasi klorofil-a dan kualitas perairan lainnya seperti suhu, salinitas, pH, oksigen terlarut serta arus. Hasil analisis menunjukkan bahwa konsentrasi klorofil-a di perairan muara Sungai Jajar berkisar antara 1,94–19,6 mg/m3dengan rata – rata 7,69 mg/m3 dan pola pergerakan arus lebih dominan ke arah Barat Daya dengan kecepatan arus sebesar 0,005–0,359 m/det. Persebaran klorofil-a secara horizontal menunjukkan nilainya tinggi pada perairan yang terletak dekat dengan daratan kemudian mengalami penurunan ke arah laut. Penelitian ini memberikan informasi terkait kesuburan dan kondisi kualitas perairan yang dapat memberikan gambaran berkaitan dengan tingkat produktivitas primer perairan muara.  The increase in population will have a negative impact on the balance of the ecosystem in water areas caused by waste generated by human activities. Quality of the water can be determined by the presence of phytoplankton. Phytoplankton has a short life cycle and therefore responds quickly to environmental changes. Determination of the presence of phytoplankton can use chlorophyll-a levels because it is a pigment that is always found in phytoplankton and a pigment that is directly involved in the process of photosynthesis. This study aims to determine the horizontal distribution of chlorophyll-a and to determine the quality conditions in the waters of the Jajar river estuary, Demak. The study used a quantitative method with locations at nine (9) sampling points which were determined purposively. The research parameters observed included the concentration of chlorophyll-a and the other water qualities such as temperature, salinity, pH, dissolved oxygen and currents. The results of the analysis of chlorophyll-a concentration in the waters of the mouth of the Jajar river ranged from 1.94-19.6 mg/m3 with an average of 7.69 mg/m3 with the dominant current movement formula from the Southwest and the current velocity of 0.005–0.359 m/s. The horizontal distribution of chlorophyll-a is a high scores in the water located near by mainland then gradually decreases towards the ocean. This study provides information related to the future and conditions of the waters that can provide an overview of the primary productivity level of estuary

oai:ojs.ejournal.undip.ac.id:article/6907 2014-05-20T02:18:21Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6907 2014-05-20T02:18:21Z Buletin Oseanografi Marina Vol 1, No 3 (2012): Buletin Oseanografi Marina; 25-32 Hadi, Saiful; Jurusan Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Sugianto, Denny Nugroho; Jurusan Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2012-04-22 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6907 en Gelombang merupakan salah satu parameter oseanografi yang sangat mempengaruhi kondisi pantai. Tiga faktor yang menentukan karakteristik gelombang yang dibangkitkan oleh angin yaitu : (1) lama angin bertiup atau durasi angin, (2) kecepatan angin dan (3) fetch (jarak yang ditempuh oleh angin dari arah pembangkitan gelombang atau daerah pembangkitan gelombang) (Baharuddin et all, 2009). Berdasarkan pengolahan data angin tahun 1995 – 2010  didapatkan  durasi dan  kecepatan angin pada musim Barat untuk angin sedang (11-16 knot) durasi  maksimumnya adalah 9 jam dan durasi rata-rata adalah 6 jam, untuk angin agak kuat (17-21 knot) durasi maksimumnya adalah 8 jam dan durasi rata-rata adalah 1 jam, untuk angin kuat (22-27 knot) durasi maksimumnya adalah 2 jam dan durasi rata-rata adalah 1 jam. Untuk musim Peralihan durasi maksimum angin sedang adalah 10 jam dan durasi rata-rata adalah 6 jam untuk angin agak kuat durasi maksimumnya adalah 8 jam dan durasi rata-rata adalah 1 jam, untuk durasi angin kuat durasi maksimum adalah 2 jam dan durasi rata-rata adalah 1. Pada musim Timur durasi maksimum angin sedang adalah 9 jam dan durasi rata-rata adalah 5 jam, untuk durasi maksimum dan rata-rata angin agak kuat adalah 1 jam, untuk durasi maksimum dan rata-rata angin kuat adalah 1 jam.Berdasarkan hasil peramalan gelombang didapatkan untuk musim Barat tinggi gelombang maksimum di Perairan Semarang mencapai 2 meter dengan  periode 6,8 detik, pada musim Peralihan tinggi gelombang maksimum  mencapai 1,99 meter dengan periode 6,8 detik, sedangkan pada musim Timur tinggi gelombang maksimum mencapai 1,49 meter dengan periode 6,1 detik.   Kata Kunci : Gelombang, Durasi Angin, Kecepatan Angin Perairan Semarang

oai:ojs.ejournal.undip.ac.id:article/68258 2025-10-18T08:20:06Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/68258 2025-10-18T08:20:06Z Buletin Oseanografi Marina Vol 14, No 3 (2025): Buletin Oseanografi Marina; 413-424 https://ejournal.undip.ac.id/index.php/buloma/article/download/68258/223745 Helinnes, Putri; Study Program Geophysics, Physics Department, Faculty of Mathematics and Natural Sciences, University of Bengkulu Hadi, Arif Ismul; Study Program Geophysics, Physics Department, Faculty of Mathematics and Natural Sciences, University of Bengkulu Farid, Muchammad; Study Program Geophysics, Physics Department, Faculty of Mathematics and Natural Sciences, University of Bengkulu Setyowati, Yuni; Study Program Geophysics, Physics Department, Faculty of Mathematics and Natural Sciences, University of Bengkulu Hardiansa, Debi; Study Program Geophysics, Physics Department, Faculty of Mathematics and Natural Sciences, University of Bengkulu Gumanty, Usman; Study Program Geophysics, Physics Department, Faculty of Mathematics and Natural Sciences, University of Bengkulu Raihana, Hana; Study Program Geophysics, Physics Department, Faculty of Mathematics and Natural Sciences, University of Bengkulu Al-Ansory, Andre Rahmat; Study Program Geophysics, Physics Department, Faculty of Mathematics and Natural Sciences, University of Bengkulu Muammar, Zaky; Study Program Geophysics, Physics Department, Faculty of Mathematics and Natural Sciences, University of Bengkulu 2025-10-18 15:20:02 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/68258 Abrasion; Satellite image; HVSR; Microtremor; 3D Modeling en This research analyzes shoreline changes in the Nangai Beach area; North Bengkulu Regency using Satellite Image data and analyzes subsurface structures using the Horizontal to Vertical Spectral Ratio (HVSR) method. The main objective of this research is to identify shoreline changes along the Nangai Beach area that occur due to abrasion. Data were collected from 30 points, with a distance of ±100 meters between each point. The research shows that the condition of the area is quite stable to vulnerable to the occurrence of abrasion disasters. Coastline changes were obtained using Satellite Image data from 2011 to 2023. Changes can be observed between points 17 and 35.63 meters, and at point 2, 33.87 meters. The Horizontal-to-Vertical Spectral Ratio (HVSR) method determines dominant frequency values and processes them through amplification to calculate the seismic vulnerability index, sediment layer thickness, and shear wave speed. These values are used to identify areas vulnerable to coastal abrasion. Based on the interpretation, hard rock is shown with a dominant frequency value () in the range 2.35-5.08 Hz, while soft rock is shown in the range 5.71-9.05 Hz. The earthquake vulnerability value () in the range 0.49-2.68 is soft rock, while the value range 3.42-5.61 is hard rock. The lower the vulnerability value (), the more susceptible the area is to abrasion. The shear wave velocity () value is low with a range of 186.83-350.85 while the high value is with a range of 350.85-596.87. A layer of rock with a 3D cross-section can be viewed using 3D modeling software by entering the value of Vs. This research makes a significant contribution to abrasion disaster mitigation through a geophysical approach.

oai:ojs.ejournal.undip.ac.id:article/20548 2020-04-17T12:06:48Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/20548 2020-04-17T12:06:48Z Buletin Oseanografi Marina Vol 7, No 2 (2018): Buletin Oseanografi Marina; 113-120 Paramudhita, Widya; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Endrawati, Hadi; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Azizah, Ria; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2018-10-08 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/20548 Zooplankton; Strukutur Komunitas; Mangunharjo; Community Structure en Perairan Desa Mangunharjo merupakan perairan yang mengalami perubahan kondisi lingkungan akibat abrasi yang berdampak pada kerusakan ekosistem mangrove dan tambak. Kondisi tersebut berpengaruh terhadap keberadaan biota perairan salah satunya adalah zooplankton. Oleh karena itu penelitian ini dilakukan untuk mengetahui struktur komunitas zooplankton di perairan Desa Mangunharjo. Pengambilan sampel dilakukan pada bulan Maret–April 2017 di perairan Desa Mangunharjo, Kecamatan Tugu, Semarang. Metode yang digunakan adalah metode deskriptif eksploratif. Analisis data yang digunakan untuk mendeskripsikan komunitas zooplankton meliputi: kompisisi dan kelimpahan, indeks keanekaragaman, indeks keseragaman dan indeks dominansi. Hasil penelitian menunjukkan bahwa zooplankton yang ditemukan secara keseluruhan sebanyak 23 genera yang terbagi atas 5 fila. Kelimpahan tertinggi sebesar 126.76 ind/L dan terendah 28.17 ind/L. Arthropoda merupakan filum yang paling banyak ditemukan pada penelitian ini. Indeks keanekaragaman yang diperoleh berkisar antara 0.72 – 2.49 dan dikatagorikan keanekargaman rendah dan sedang. Untuk indeks keseragaman yang diperoleh berkisar antara 0.44 – 0.98 dan dikatagorikan keseragaman sedang dan tinggi. Dan untuk indeks dominansi diperoleh nilai berkisar antar 0.02 – 0.98 dan dikatagorikan tidak ada dominasi. Mangunharjo Village waters have changed environmental conditions due to abrasion that damage the mangrove ecosystems and ponds. These conditions affect the presence one of aquatic biota which is zooplankton. Therefore this research is done to know the structure of zooplankton community in Mangunharjo Village waters. Sampling was conducted in March-April 2017 in the waters of Mangunharjo Village, Tugu Sub-district, Semarang. The method used is descriptive explorative method. The data analysis used to describe the zooplankton community includes: composition and abundance, diversity index, uniformity index and dominance index. The results showed that zooplankton found as a whole 23 genera of 5 fila. The highest abundance was 126.76 Ind/L and the lowest was 28.17 Ind/L. Arthropods are the most common phyla in this study. The index of diversity obtained ranges from 0.72 to 2.49 and categorized at low and medium diversity. As for the uniformity index obtained ranged from 0.44 to 0.98 and categorized at medium and high uniformity. And for the dominance index obtained values ranged between 0.02 - 0.98 and categorized at non dominance.

oai:ojs.ejournal.undip.ac.id:article/50061 2023-06-20T04:50:15Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/50061 2023-06-20T04:50:15Z Buletin Oseanografi Marina Vol 12, No 2 (2023): Buletin Oseanografi Marina; 192-200 Prasetia, I Nyoman Dodik; Program Studi Bioteknologi Perikanan, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pendidikan Ganesha Setiabudi, Gede Iwan; Program Studi Bioteknologi Perikanan, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pendidikan Ganesha Antara, Kadek Lila; Program Studi Akuakultur, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pendidikan Ganesha Amelia, Jasmine Masyitha; Program Studi Akuakultur, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pendidikan Ganesha Br Sitepu, Gressty Sari; Program Studi Bioteknologi Perikanan, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pendidikan Ganesha Maharani, Made Dwipa Kusuma; Program Studi Bioteknologi Perikanan, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pendidikan Ganesha Wulandari, Dewi; Program Studi Bioteknologi Perikanan, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pendidikan Ganesha Suardana, I Nyoman; Program Studi Teknologi Pendidikan, Pascasarjana, Universitas Pendidikan Ganesha 2023-06-20 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/50061 Substrat berlumpur,; Wisata bahari; Jenis langka; Kelimpahan dan keanekaragaman id Kawasan Pesisir  Kecamatan Buleleng terdiri dari Pantai Desa Kalibukbuk, Anturan, Tukad Mungga, Pemaron, Baktiseraga, Banyuasri, Kaliuntu, Kampung Anyar, Kampung Bugis, Kampung Baru, Banyuning, dan Penarukan merupakan kawasan perairan yang berada di pusat Kabupaten Buleleng.  Perairan Kecamatan Buleleng memiliki karakteristik subsrat perairan berupa hamparan terumbu karang, patahan karang, pasir yang didominasi oleh pasir hitam, dan berlumpur.  Kondisi subsrat memiliki potensi pengembangan wisata muck dive sebagai alternatif wisata bahari yang berkelanjutan.  Muck dive merupakan jenis penyelaman yang dilakukan di subsrat berlumpur dengan berfokus untuk menemukan jenis langka dan samar yang jarang ditemukan di terumbu karang.  Penelitian bertujuan mengetahui potensi muck dive dengan memperkuat data identifikasi jenis, kelimpahan dan keanekaragaman organisme yang dapat dijadikan sebagai ikon obyek wisata selam.  Peneltian menggunakan metode underwater visual sensus dengan mengikuti line transect. Penelitian menunjukkan Perairan Kecamatan Buleleng memiliki potensi pengembangan wisata muck dive dengan karakteristik di setiap perairan desa yang beragam berdasarkan tipe subsrat perairan.  Kelimpahan dan keanekaragaman jenis organisme sebagai obyek muck dive tertinggi terdapat di Pantai Desa Baktiseraga, Banyuasri, dan Kaliuntu, sedangkan terendah di Desa Kampung Anyar, Kampung Bugis, Kampung Baru, Banyuning, dan Penarukan. Potensi wisata muck dive layak dikembangkan sebagai alternatif  wisata bahari yang dikelola secara berkelanjutan.   The coastal area of Buleleng districts consists of Kalibukbuk, Anturan, Tukad Mungga, Pemaron, Baktiseraga, Banyuasri, Kaliuntu, Kampung Anyar, Kampung Bugis, Kampung Baru, Banyuning, and Penarukan are water areas located in the center of Buleleng Regency. The Buleleng districts water have the characteristics of the water substrate in the form of coral reefs, coral fractures, sand dominated by black sand, and muddy. Substrate conditions have the potential to increase muck dive tourism as an alternative to sustainable marine tourism. Muck dive is a type of diving that is carried out in muddy substrates with a focus on finding rare and rare species that are rarely found in coral reefs. This study aims to determine the potential of muck dive by strengthening the identification data of species, abundance and diversity of organisms that can be used as icons of diving tourism objects. The research uses the underwater visual census method by following the line transect.The research shows that the Buleleng districts waters have the potential to develop muck dive tourism with different characteristics in each village waters based on the type of substrate. The highest abundance and diversity of organisms as muck dive objects was found in Baktiseraga, Banyuasri, and Kaliuntu Beaches, while the lowest was in Kampung Anyar, Bugis, Kampung Baru, Banyuning, and Penarukan villages. This potential to be the one of alternative for marine tourism which is must managed sustainably.

oai:ojs.ejournal.undip.ac.id:article/6943 2014-05-22T03:11:04Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6943 2014-05-22T03:11:04Z Buletin Oseanografi Marina Vol 2, No 2 (2013): Buletin Oseanografi Marina; 78-86 Rejeki, Sri; Program Studi Ilmu Kelautan, Jurusan Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Irwani, Irwani; Program Studi Ilmu Kelautan, Jurusan Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Hisyam, Firdaus Maulana; Program Studi Ilmu Kelautan, Jurusan Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2013-04-18 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6943 en Pertumbuhan penduduk yang tinggi dan pesatnya kegiatan pembangunan di pesisir bagi berbagai peruntukan (pemukiman, perikanan dan pelabuhan) berdampak dan memberikan tekanan ekologis terhadap ekosistem pesisir, khususnya ekosistem hutan mangrove. Meningkatnya tekanan ini tentunya berdampak terhadap kerusakan ekosistem hutan mangrove itu sendiri baik secara langsung maupun tak langsung. Tujuan dari penelitian ini adalah untuk mengkaji struktur komunitas ikan pada ekosistem mangrove di Desa Bedono, Kecamatan Sayung, Kabupaten Demak. Penelitian ini menggunakan metode penelitian survei deskriptif dan lokasi pengambilan sampel ikan ditentukan dengan metode purposive sampling. Sampel ikan diambil selama delapan minggu menggunakan liftnet. Penelitian ini menemukan sembilan famili ikan yakni Ambassidae , Ariidae, Mugilidae, Tetraodontidae, Phallostethidae, Drepanidae, Gobiidae, Aplocheilidae, dan Syngnathidae. Dengan spesies yang sering ditemukan adalah Mugilidae dan Ambassidae, sementara yang paling sedikit ditemukan adalah Tetraodontidae, Phallostethidae, Drepanidae, Aplocheilidae, dan Syngnathidae. Kata kunci : Struktur Komunitas, Ikan, Mangrove, Bedono

oai:ojs.ejournal.undip.ac.id:article/54992 2024-05-31T07:50:39Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/54992 2024-05-31T07:50:39Z Buletin Oseanografi Marina Vol 13, No 1 (2024): Buletin Oseanografi Marina; 21-32 Azhari, Ferian; Program Studi Magister Oseanografi, Direktorat Pascasarjana, Sekolah Tinggi Teknologi Angkatan Laut Pranowo, Widodo Setiyo; Program Studi Magister Oseanografi, Direktorat Pascasarjana, Sekolah Tinggi Teknologi Angkatan Laut Badan Riset dan Inovasi Nasional Hendra, Hendra; Program Studi Magister Oseanografi, Direktorat Pascasarjana, Sekolah Tinggi Teknologi Angkatan Laut Umam, Choirul; Program Studi Magister Oseanografi, Direktorat Pascasarjana, Sekolah Tinggi Teknologi Angkatan Laut 2024-02-06 14:07:56 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/54992 Laut Natuna; Gelombang laut; ENSO; SOI; ONI id Laut Natuna merupakan jalur pelayaran internasional yang strategis yang menghubungkan Asia Timur dan Samudera Hindia. Untuk menjamin keamanan dan keselamatan dalam jalur pelayaran dan kegiatan kemaritiman tentu diperlukan diperlukan informasi yang jelas dan akurat tentang parameter fisik kelautan salah satunya kondisi gelombang laut. Penelitian ini bertujuan untuk mempelajari pengaruh El-Nino Southern Oscillation (ENSO) terhadap gelombang laut di perairan Laut Natuna dan menganalisis nilai korelasi antara nilai ENSO dan gelombang laut di daerah tersebut. Penelitian ini menggunakan data gelombang laut (SWH dan Hmax), nilai Southern Oscillation Index (SOI), dan nilai Oceanic Niño Index (ONI). Penelitian menggunakan data dalam rentang waktu dari tahun 2012 hingga 2022, dengan mengambil data saat terjadinya fenomena ENSO. Lokasi penelitian ini terletak di perairan Laut Natuna dengan batas koordinat 2030’ LU – 8045’ LS dan 103018’ BT – 109030’ BT dan mempergunakan 5 (lima) stasiun pengamatan dari 169 stasiun pengatan yang menjadi domain penelitian. Hasil penelitian menunjukkan bahwa ENSO memiliki pengaruh terhadap gelombang laut di perairan Laut Natuna, dengan nilai korelasi antara nilai SOI dengan nilai gelombang memperlihatkan hubungan dengan klasifikasi sangat lemah hingga cukup kuat dengan nilai korelasi tertinggi r = -0,41 pada stasiun pengamatan 27. Untuk nilai korelasi antara nilai ONI dengan nilai gelombang memperlihatkan korelasi yang lebih baik dengan klasifikasi lemah hingga kuat dengan nilai korelasi tertinggi r = -0,74 pada stasiun pengamatan 91. Gelombang tinggi di perairan Laut Natuna lebih cenderung terjadi pada waktu monsun barat / monsun Asia pada bulan Desember, Januari, dan Februari. Penelitian ini memberikan pemahaman yang lebih baik tentang hubungan antara ENSO dan gelombang laut di perairan Laut Natuna. Informasi ini berguna bagi pihak yang berkepentingan dalam mengambil keputusan terkait aktivitas di sekitar perairan Laut Natuna, seperti pelayaran dan kegiatan ekonomi maritim lainnya. The Natuna Sea is a strategic international shipping lane connecting East Asia and the Indian Ocean. To ensure security and safety in shipping lanes and maritime activities, clear and accurate information is needed about marine physical parameters, one of which is the condition of sea waves. This study aims to study the effect of El-Nino Southern Oscillation (ENSO) on sea waves in the Natuna Sea waters and to analyze the correlation value between ENSO values and sea waves in that area. This study uses ocean wave data (SWH and Hmax), Southern Oscillation Index (SOI) values, and Oceanic Niño Index (ONI) values obtained from the official website pages of each institution/institution. The study uses data spanning from 2012 to 2022, by taking data when the ENSO phenomenon occurred. The research location is located in the waters of the Natuna Sea with coordinate boundaries 2030' N - 8045' S and 103018' E - 109030' E and 5 (five) shelter stations of 169 control stations which are the research domain. The results showed that ENSO had an influence on sea waves in the Natuna Sea, with a correlation value between the SOI value and the value of the waves emitting a relationship with a very weak to moderately strong classification with the highest correlation value r = -0.41 at observation station 27. For the value the correlation between the ONI value and the wave value reveals a better correlation with a weak to strong classification with the highest correlation value r = -0.74 at observation station 91. High waves in the waters of the Natuna Sea are more likely to occur during the west monsun / the Asian monsoon in December, January and February. This research provides a better understanding of the relationship between ENSO and ocean waves in the Natuna Sea. This information is useful for interested parties in making decisions regarding activities around the waters of the Natuna Sea, such as cruise ships and other maritime economic activities.

oai:ojs.ejournal.undip.ac.id:article/52267 2023-11-04T02:49:24Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/52267 2023-11-04T02:49:24Z Buletin Oseanografi Marina Vol 12, No 3 (2023): Buletin Oseanografi Marina; 347-356 Safira, Nur; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Malikussaleh Erniati, Erniati; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Malikussaleh Syahrial, Syahrial; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Malikussaleh Hadinata, Fitra Wira; Program Studi Manajemen Sumberdaya Perairan Fakultas Pertanian, Universitas Tanjungpura Anggraini, Rika; Jurusan Ilmu Kelautan, Fakultas Ilmu Kelautan dan Perikanan, Universitas Maritim Raja Ali Haji Ikhsan, Nur; Program Studi Ekowisata Bahari, Akademi Komunitas Kelautan dan Perikanan Wakatobi Utami, Risnita Tri; Program Studi Akuakultur, Universitas Prof. Dr. Hazairin SH Ayhuan, Hendrik V.; Jurusan Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Papua Ezraneti, Riri; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Malikussaleh 2023-10-01 06:25:41 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/52267 Mangrove; Rhizophora stylosa; Distribusi; Demografi; Morfometrik; Kuala Langsa id Kajian terhadap populasi mangrove Rhizophora stylosa di Desa Kuala Langsa Kota Langsa dilakukan pada bulan November 2021 dengan tujuan untuk mengetahui distribusi geografi, struktur demografi, morfometrik organ dan karakteristik penciri morfometriknya. Data dikumpulkan dengan menarik transek kuadran berukuran 10 x 10 m yang tegak lurus garis pantai, dimana penentuan stasiun pengamatannnya berdasarkan purposive sampling. Organ daun, buah dan bunga diambil pada 5 tegakan pohon di masing-masing plot, kemudian diukur morfometriknya. Untuk struktur demografi, pengelompokkan umurnya dianalisis menurut metode Bhattacharya dan untuk penciri morfometriknya dianalisis berdasarkan statistik Principal Component Analysis (PCA). Hasil kajian memperlihatkan bahwa distribusi geografinya tergolong berlimpah (frekuensi relatif di atas 80%) dan pengelompokkan umurnya hanya terdiri dari satu kelompak dengan kisaran nilai tengah diameter batangnya antara 2,30–12,44 cm. Morfometrik diameter buah yang dominan ditemukan adalah 1,05–1,11 cm, panjang buah 26,46–27,77 cm, lebar kelopak bunga 0,38–0,41 cm, panjang kelopak bunga 0,98–1,04 cm, lebar daun 5,50–5,77 cm, panjang daun 11,60–12,11 cm dan diameter batang 5,41–7,00 cm. Selain itu, panjang buah, panjang kelopak bunga dan diameter batang merupakan morfometrik pencirinya dengan keragaman data 82,73%. In November 2021, a study was conducted on the Rhizophora stylosa mangrove population in Kuala Langsa Village, Langsa City, with the objective of determining the population's geographical distribution, demographic structure, morphometric organs, and morphometric characteristics. The data were collected by pulling a 10 x 10 m quadrant transect parallel to the shoreline, with the observation station determined through purposive sampling. Leaf, fruit, and flower organs were collected from five tree stands in each plot and then measured morphometrically. Battachraya method was used for the demograpic structure and Principal Component Analysis (PCA) was used to determine the morphological characteristics. The study's findings revealed a widespread geographic distribution (relative frequency greater than 80%) and a single age grouping with median stem diameters ranging from 2.30-12.44 cm. The dominant fruit diameter morphometrics were 1.05–1.11 cm, fruit length 26.46–27.77 cm, petal width 0.38–0.41 cm, petal length 0.98–1.04 cm, leaf width 5.50–5.77 cm, leaf length 11.60–12.11 cm, and diameter stem 5.41–7.00 cm. Furthermore, fruit length, flower petal length, and stem diameter are all morphometric characteristics with an 82.73% data diversity.  

oai:ojs.ejournal.undip.ac.id:article/30160 2021-06-08T16:31:07Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/30160 2021-06-08T16:31:07Z Buletin Oseanografi Marina Vol 10, No 2 (2021): Buletin Oseanografi Marina; 151-161 Insafitri, Insafitri; Program Studi Ilmu Kelautan, Jurusan Kelautan dan Perikanan, Fakultas Pertanian, Universitas Trunojoyo Madura Asih, Eka Nurahemma Ning; Program Studi Ilmu Kelautan, Jurusan Kelautan dan Perikanan, Fakultas Pertanian, Universitas Trunojoyo Madura Nugraha, Wahyu Andy; Program Studi Ilmu Kelautan, Jurusan Kelautan dan Perikanan, Fakultas Pertanian, Universitas Trunojoyo Madura 2021-05-22 17:24:28 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/30160 Penutupan karang; Snorkeling; Terumbu karang; Gili Labak id Wisata snorkeling terumbu karang di perairan pulau Gili Labak merupakan salah satu sektor wisata bahari yang sedang dikembangkan oleh pemerintah kebupaten Sumenep Madura sejak tahun 2014 hingga saat ini. Peningkatan jumlah wisatawan yang terjadi pada beberapa tahun terakhir dapat menimbulkan resiko tekanan dan kerusakan ekosistem terumbu karang di area snorkeling secara berkala. Penelitian ini bertujuan untuk mengetahui dampak kegiatan wisatawan sebelum, selama dan sesudah snorkeling terhadap ekosistem terumbu karang yang dikaji dengan mengetahui jenis karang yang mendominasi, status persentase tutupan terumbu karang serta potensi Dampak Wisata Bahari (DWB) snorkeling di lokasi wisata snorkeling pulau Gili Labak Sumenep. Persentase penutupan lifeform karang pulau Gili Labak khususnya di area snorkelling didominasi oleh karang hidup sebanyak 74% dan unsur abiotik sebesar 22%. Jenis karang yang mendominasi pulau Gili Labak adalah Acropora Branching sebesar 19,88% dan Coral Foliose sebesar 10,25%. Selama waktu 6 minggu pengamatan terjadi penurunan total karang sebesar 0,64% yang termasuk kategori rusak ringan, dimana sebagian besar kerusakan terjadi pada karang dengan bentuk pertumbahan branching misalnya Acropora Submassive dan Coral Submassive. Penurunan persen tutupan karang yang tinggi terjadi setelah kegiatan snorkeling (after) yang dilakukan oleh wisatawan. Analisa potensi Dampak Wisata Bahari (DWB) snorkeling pada terumbu karang di perairan Gili Labak selama 6 minggu pengamatan masuk dalam kategori rendah yaitu berkisar 0,052% hingga 0,085%. Faktor penyebab kecilnya nilai presentase Dampak Wisata Bahari (DWB) ini diduga karena waktu pengamatan cenderung pendek dan jenis karang yang mendominasi yaitu Acropora. Acropora memiliki kemampuan regenerasi lebih cepat dibandingkan jenis lainnya.  The snorkeling activity around coral reefs in the waters of Gili Labak is one of the marine tourism sectors that is being developed by the Sumenep Madura district government since 2014. Increasing number of tourists that occurs in recent years pose a risk of pressure and damage to coral reef ecosystems in the snorkeling area. This study aims to determine the impact of tourist activities before, during and after snorkeling on coral reef ecosystems that are studied by knowing the type of dominated coral, the percentage status of coral cover and the potential Impact of snorkeling at the snorkeling sites of the island of Gili Labak Sumenep. The percentage of coral cover in the island of Gili Labak especially in the snorkelling area is dominated by live coral ( 74%) and abiotic elements by 22%. Coral species that dominate the island of Gili Labak are Acropora Branching at 19.88% and Coral Foliose at 10.25%. During the 6-week observation there was a decrease in live coral cover by 0.64% which was categorized as minor damage, most of the damage occurred to branching   Acropora, sub-massive Acropora and Coral Sub-massive. The high percent decrease in coral cover occurred after snorkeling conducted by tourists. Analysis of the potential impact of snorkeling on coral reefs in the waters of Gili Labak for 6 weeks of observation is in the low category, ranging from 0.052% to 0.085%. The factor causing the small impact of Marine Tourism is presumably because the observation time tends to be short and the dominant coral species is Acropora. Acropora has the ability to regenerate faster than other types.

oai:ojs.ejournal.undip.ac.id:article/62152 2024-11-04T07:16:45Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/62152 2024-11-04T07:16:45Z Buletin Oseanografi Marina Vol 13, No 3 (2024): Buletin Oseanografi Marina; 437-447 A'yun, Qurrota; Program Studi Biologi, Fakultas Sains dan Teknologi, Universitas Nahdlatul Ulama Purwokerto Rahayu, Nur Laila; Program Studi Biologi, Fakultas Sains dan Teknologi, Universitas Nahdlatul Ulama Purwokerto Zaenuri, Musyarif; Program Studi Biologi, Fakultas Sains dan Teknologi, Universitas Nahdlatul Ulama Purwokerto Kresnasari, Dewi; Program Studi Ilmu Perikanan, Fakultas Sains dan Teknologi, Universitas Nahdlatul Ulama Purwokerto 2024-10-30 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/62152 Tekstur Sedimen; Makrozoobentos; Biotic Index id Laguna Segara Anakan (LSA) Cilacap yang terletak di antara Jawa dan Nusakambangan, Jawa Tengah, merupakan habitat yang baik bagi biota makrozoobentos. Habitat tersebut dicirikan dengan sedimen pasir, debu dan liat. Identifikasi dan analisis keanekaragaman makrozoobentos penting untuk menentukan kondisi ekosistem. Tujuan dari penelitian ini adalah untuk mengetahui jenis tekstur sedimen dan untuk mengetahui kualitas perairan dengan menerapkan bioindikator menggunakan makrozoobentos. Metode yang digunakan yaitu survei dan penggambilan sampel secara acak dilakukan pada saat mengambil sampel sedimen dan makrozoobentos pada 12 titik penenilitian menggunkaan hand packing dengan bantuan cetok. Pengambilan sampel dilakukan pada bulan September – November 2023. Untuk mengetahui pengaruh tekstur sedimen terhadap FBI makrozoobentos dianalisis secara regresi. Hasil penelitian tekstur sedimen fraksi pasir berkisar 1,09-1,7%; fraksi debu berkisar 31,43-48,31% dan fraksi liat berkisar 50,6-67,17%. FBI makrozoobentos berkisar antara 7,097-7,399 yang berarti kondisi perairan di LSA Cilacap dalam kategori buruk – sangat buruk. Tekstur sedimen fraksi pasir terhadap FBI makrozoobentos memiliki pengaruh yang sangat kuat dengan nilai regresi 0,916 sedangkan tekstur sedimen fraksi liat (R = 0,223) dan debu (R = 0,198) memiliki pengaruh yang lemah terhadap FBI makrozoobentos.    Segara Anakan Lagoon (LSA) Cilacap, which is located between Java and Nusakambangan, Central Java, is a good habitat for macrozoobenthic biota. This habitat is characterized by sand, dust and clay sediments. Identification and analysis of macrozoobenthos diversity is important for determining ecosystem conditions. The aim of this research is to determine the type of sediment texture and to determine water quality by applying bioindicators using macrozoobenthos. The method used was a survey and random sampling carried out when taking sediment and macrozoobenthos samples at 12 research points using hand packing with the help of a spat. Sampling was carried out in September – November 2023. To determine the effect of sediment texture on the macrozoobenthos FBI, it was analyzed using regression. The results of the sediment texture research, the sand fraction ranged from 1.09-1.7%; the dust fraction ranges from 31.43-48.31% and the clay fraction ranges from 50.6-67.17%. The FBI macrozoobenthos ranges from 7,097-7,399, which means that the water conditions in the Cilacap LSA are in the bad – very bad category. The sand fraction sediment texture on macrozoobenthos FBI had a very strong influence with a regression value of 0.916, while the clay fraction sediment texture (R = 0.223) and dust (R = 0.198) had a weak influence on macrozoobenthos FBI.

oai:ojs.ejournal.undip.ac.id:article/15727 2020-04-17T12:02:35Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/15727 2020-04-17T12:02:35Z Buletin Oseanografi Marina Vol 5, No 2 (2016): Buletin Oseanografi Marina; 97-100 Subagiyo, Subagiyo; Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro Margino, Sebastian; Faculty of Agriculture, Gadjah Mada University, Yogyakarta, Indonesia Triyanto, Triyanto; Faculty of Agriculture, Gadjah Mada University, Yogyakarta, Indonesia Tri Nuraini, Ria Azizah; Faculty of Agriculture, Gadjah Mada University, Yogyakarta, Indonesia Setyati, Wilis Ari Pramesti, Rini 2016-10-09 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/15727 en Kontribusi bakteri asam laktat dan bakteriosin dalam pengembangan keamanan makanan telah lama diketahui. Metode sederhana dan cepat diperlukan untuk menseleksi bakteri asam laktat yang mampu menghasilkan bakteriosin. Dua pendekatan telah dilakukan secara berurutan dalam metode ini. Pendekatan pertama adalah seleksi bakteri asam laktat menggunakan medium MRS agar yang diperkaya dengan CaCO3. CaCO3 digunakan sebagai indikator suatu koloni bakteri mampu menghasilkan asam. Pendekatan kedua adalah melakukan seleksi secara langsung terhadap koloni-koloni bakteri yang tumbuh pada medium seleksi pertama menggunakan teknik overlay. Medium MRS soft agar yang telah diinokulasi dengan bakteri Pediococcus acidilactisi di-overlay-kan ke atas koloni-koloni yang tumbuh di medium seleksi pertama. Zona bening yang terbentuk di sekitar koloni menunjukkan dihasilkannya bakteriosin. Koloni-koloni yang menghasilkan zona bening pada tahap pertama dan kedua selanjutnya diisolasi dan dimurnikan. Isolat ini adalah isolat bakteri penghasil asam dan bakteriosin. Pengujian atas metode ini terbukti efektif untuk program isolasi dan seleksi bakteri asam laktat penghasil bakteriosin dari intestinum ikan dan udang. Kata kunci : metode, skrining, bakteri asam laktat, bakteriosin

oai:ojs.ejournal.undip.ac.id:article/41617 2022-09-07T17:08:50Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/41617 2022-09-07T17:08:50Z Buletin Oseanografi Marina Vol 11, No 2 (2022): Buletin Oseanografi Marina; 139-148 Juharna, Fadhel Muhammad; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Widowati, Ita; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Endrawati, Hadi; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2022-05-20 08:04:52 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/41617 Logam Berat ; Timbal ; Kromium ; P. viridis ; MTI id Logam berat merupakan kelompok unsur logam yang memiliki berat jenis ≥ 5gr/cm3. Sifatnya yang mudah mengendap dan mudah tertransportasikan menyebabkan biota termasuk kerang mudah mengakumulasi logam berat. Kerang hijau (P. viridis) merupakan salah satu biota laut bernilai ekonomis dan banyak dikonsumsi masyarakat. Pencemaran logam berat dalam kerang hijau ini dapat berdampak buruk bagi kesehatan manusia. Penelitian ini bertujuan untuk mengetahui kandungan logam berat timbal (Pb) dan kromium (Cr) pada air, sedimen, dan P. viridis serta  mengetahui batas maksimum konsumsi mingguan oleh manusia dalam mengkonsumsi kerang hijau. Penelitian dilakukan bulan Juli-September 2020. Metode penelitian menggunakan metode deskriptif. Sampel diambil dari Perairan Morosari Demak dengan metode purposive random sampling. Kemudian, kandungan logam berat sampel dianalisisi menggunakan instrumen AAS (Atomic Absorption Spectrophotometer), dilanjutkan dengan analisa keamanan konsumsi menggunakan rumus MTI (Maximum Tolerable Intake). Hasil menunjukkan bahwa kandungan logam Pb lebih tinggi dibanding logam Cr dalam P. viridis dengan konsentrasi berturut-turut (3,876-4,117) mg/kg untuk logam Pb dan (0,179-0,283) mg/kg untuk logam Cr. Batas maksimal konsumsi kerang hijau yang aman dikonsumsi perminggu dari Perairan Morosari untuk individu dengan berat badan 60 kg yaitu 0,364 kg/minggu untuk logam Pb dan 4,94 kg/minggu untuk logam Cr. Sedangkan konsumsi maksimal untuk individu berat badan 45 kg yaitu 0,273 kg/minggu untuk logam Pb dan 3,705 kg/minggu untuk logam Cr.    Heavy metals are a group of metal elements that have a specific gravity of 5gr/cm3. Its nature which is easy to settle and easy to transport causes biota, including bivalvia, to easily accumulate heavy metals. Green mussel (P. viridis) is one of the marine species that has economic value and is widely consumed by the community. Heavy metal contamination in shellfish can harm human health. This study aims to determine the heavy metal content of lead (Pb) and chromium (Cr) in water, sediment, and P. viridis and to determine the maximum weekly consumption of P. viridis. The research was conducted in July-September 2020. The research method used a descriptive method. Samples were taken from Morosari Demak waters with the purposive random samping method. Then, content of heavy metals anylyzed by AAS (Atomic Absorption Spectrophotometer) instrument, followed by an analysis of consumption safety using the MTI (Maximum Tolerable Intake) formula. The results showed that the heavy metal content of Pb was more than that of Cr. The heavy metals in P. viridis for Pb ranged from (3.876-4.117) mg.kg-1 while the Cr metal had a range (0.179-0.283) mg.kg-1. The limit safe consumption of green mussels per week from Morosari Waters for individuals weighing 60 kg is 0.364 kg/week for Pb metal and 4.94 kg/week for Cr metal. While the maximum consumption for individuals weighing 45 kg is 0.273 kg/week for Pb metal and 3.705 kg/week for Cr metal.

oai:ojs.ejournal.undip.ac.id:article/2984 2012-04-03T06:04:21Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/2984 2012-04-03T06:04:21Z Buletin Oseanografi Marina Vol 1, No 1 (2011): Buletin Oseanografi Marina Atmodjo, Warsito The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/2984 en Abstract   Estuary is part of the downstream that straightly related to the sea which function as expenseas of water river (Triatmodjo, 1999). Sediment transport which came from river and sea will be akumulated in estuary. That akumulated make effect to changes of the depth in that area. The purpose from this research is to know about the suspended sediment spreading in Porong estuary. The research was done in three stages which were field survey on April 5th until 24th 2008, laboratory analysis to bottom sediment samples on May 5th until 27th 2008 in Core Laboratory Marine Geology Research and Development Centre Cirebon and suspended sediment analysis on June 13th 2008 in Water Laboratory Environmental Engineering, Civil and Environmental Engineering Department, Bandung Institute Technology. Model running on Computation Laboratory Marine Sciences Department, Diponegoro University Semarang. Model simulation running on 15 days from April 9th until 24th 2008 related to the field survey. Descriptive method was used in this research, and SMS (Surface Water Modelling System) software used for making the model.             Materials used were primary and secondary data. Primary data that is current, tides, bottom sediment and suspended sediment. Secondary data that is Porong river flow, Juanda wind data and bathymetric map.             Based on simulation current speed in research location on Spring condition up to 0.270 m/s and current speed on Neap condition up to 0.080 m/s. Which direction on ebb to flood condition moved from east to west then to north, on flood to ebb condition moved from north to south then to east. Simulation result of Suspended sediment consentration spreading on 15 days showed that suspended sediment consentration was 3.803 until 240.448 mg/l which dominate direction moved to south east. Key words : suspended sediment, current, Porong estuary.

oai:ojs.ejournal.undip.ac.id:article/72357 2026-02-11T04:49:13Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/72357 2026-02-11T04:49:13Z Buletin Oseanografi Marina Vol 14, No 2 (2025): Buletin Oseanografi Marina; 299-308 Safikri, Ilham; Master of Marine Science, Faculty of Fisheries and Marine Science, Universitas Diponegoro Zainuri, Muhammad; Department of Oceanography, Faculty of Fisheries and Marine Science, Universitas Diponegoro Ismanto, Aris; Department of Oceanography, Faculty of Fisheries and Marine Science, Universitas Diponegoro 2025-06-10 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/72357 Tidal Flood; Current; Wave; Sediment en Pekalongan is one of the cities in Central Java affected by tidal flooding. Tidal floods occur due to sea level rise and land subsidence in Pekalongan, so far the tidal floods have had an impact on the community. Infrastructure damage and disruption of community activities are examples of the impact of tidal floods in Pekalongan. One of the government policies in overcoming tidal floods is to build sea walls along the coast of     Pekalongan. This policy will certainly have an impact on the morphological pattern of the coastal area. This study was conducted to determine the pattern of currents, waves, and sediment characteristics on the coast of Pekalongan after the sea wall. The analysis was conducted using current and wave modeling of delft-3d application. Sediment analysis was conducted by analyzing sediment grain size (Granulometry). The results show that currents and waves are influenced by seasonal winds that occur in Pekalongan. The dominant season in coastal Pekalongan occurs between December - January (West Season). Current conditions in the west season move with a speed of 0.2 -0.3 m/set moving eastward. West season wave conditions move with a height of 7.2 meters with a peak period of 7.2 seconds. While the sediment characteristics in Pekalongan are dominated by mud - sandy. From these sediment characteristics, it can be concluded that the influence of currents and waves of the west season can cause the distribution of sediments towards the east.

oai:ojs.ejournal.undip.ac.id:article/19044 2020-04-17T12:05:51Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/19044 2020-04-17T12:05:51Z Buletin Oseanografi Marina Vol 7, No 1 (2018): Buletin Oseanografi Marina; 43-50 Madilana, Rivan Novianto; Departemen Ilmu KelautanFakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Wijayanti, Diah Permata; Departemen Ilmu KelautanFakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Sabdono, Agus; Departemen Ilmu KelautanFakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2018-05-24 17:39:40 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/19044 Bacteria Symbionts; Porites; Phatogenic; Antibacterial; Antibakteri en Porites merupakan genus karang yang memiliki persebaran luas di Indonesia, termasuk perairan Gunungkidul, Yogyakarta. Penelitian menunjukkan bahwa bakteri simbion karang Porites memiliki potensi antibakteri dalam menanggulangi bakteri patogen. Penelitian ini betujuan untuk mengetahui jenis bakteri simbion karang Porites dari Perairan Gunungkidul Yogyakarta yang memiliki aktivitas antibakteri patogen S. aureus dan E. coli. Bakteri simbion diisolasi dari fragmen jaringan karang dengan pengenceran bertingkat, kemudian uji aktivitas antibakteri dilakukan dengan menggunakan metode overlay dan difusi paperdisk. Delapan dari 64 isolat aktif menghambat kedua bakteri patogen Staphylococcus aureus dan Escherichia coli. Dua diantaranya merupakan isolat unggul yang menunjukkan aktivitas antibakteri paling baik. Kedua isolat selanjutnya diidentifikasi karakteristik molekular DNA dengan sekuen gen 16S rRNA. Hasil identifikasi 16S rRNA menunjukkan isolat GKP1.4.3 memiliki kesamaan 99% dengan Bacillus pumilus strain NBRC 12092, dan isolat GKP3.2.2 memiliki kesamaan 99% dengan Vibrio natriegens strain NBRC 15636.Porites is a coral which has distributed widely in Indonesia, including Gunungkidul Waters, Yogyakarta. Research has shown that Porites coral symbiont bacteria have antibacterial potency against pathogenic bacteria.This study aims to determine the type of Porites coral symbiont bacteria collected from the waters of Gunungkidul Yogyakarta which has antibacterial activity of S. aureus and E. coli. Bacteria symbionts were isolated from coral tissue fragments by serial dillution method, while antibacterial activity was performed by using overlay and paperdisk diffusion method. Eight of the 64 active isolates inhibited both pathogenic bacteria S. aureus and E. coli. Two of 8 isolates showed stronger antibacterial activity. The two isolates subsequently identified the molecular characteristics of DNA with the 16S rRNA gene sequence. The identification of 16S rRNA showed that GKP1.4.3 isolate had 99% similarity with Bacillus pumilus strain NBRC 12092, and GKP3.2.2 isolate had 99% similarity with Vibrio natriegens strain NBRC 15636.

oai:ojs.ejournal.undip.ac.id:article/42322 2023-05-13T09:22:51Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/42322 2023-05-13T09:22:51Z Buletin Oseanografi Marina Vol 12, No 1 (2023): Buletin Oseanografi Marina; 87-97 Hidayah, Zainul; Program Studi Ilmu Kelautan, Jurusan Kelautan dan Perikanan, Fakultas Pertanian, Universitas Trunojoyo Madura Lembaga Penelitian dan Pengabdian kepada Masyarakat, Universitas Trunojoyo Madura Maula, Minkhatul; Program Studi Ilmu Kelautan, Jurusan Kelautan dan Perikanan, Fakultas Pertanian, Universitas Trunojoyo Madura Wardhani, Maulinna Kusumo; Program Studi Ilmu Kelautan, Jurusan Kelautan dan Perikanan, Fakultas Pertanian, Universitas Trunojoyo Madura Program Doktor Departemen Teknik Kelautan, Fakultas Teknologi Kelautan, Institut Teknologi Sepuluh Nopember Surabaya 2023-02-04 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/42322 Ujung Pangkah; current; suspended solids; modelling; hydrodynamics id Ujung Pangkah merupakan muara dari Sungai Bengawan Solo yang merupakan salah satu sungai terpanjang di Indonesia. Secara administrasi, daerah ini masuk kedalam wilayah Kecamatan Ujung Pangkah Kabupaten Gresik. Aliran Sungai Bengawan Solo yang bermuara di perairan estuari ini membawa sedimen yang terlarut dalam bentuk Muatan Padatan Tersuspensi (MPT) yang persebarannya dipengaruhi oleh pergerakan arus.   Penelitian ini bertujuan untuk mengetahui pola sirkulasi arus di perairan estuari Ujung Pangkah Gresik dan menganalisis pengaruh pergerakan arus dan pasang surut terhadap sebaran MPT. Simulasi model hidrodinamika digunakan pada penelitian ini dengan input data utama adalah pasang surut dan batimetri. Hasil penelitian menjelaskan bahwa model hidrodinamika yang diperoleh untuk menjelaskan pergerakan arus pasang surut dengan kecepatan berkisar antara 0,12 -0,38 m/s. Pola sebaran menunjukkan bahwa konsentrasi MPT yang tinggi umumnya terjadi pada saat kondisi perairan surut, sedangkan pada saat kondisi pasang, nilai konsentrasi MPT cenderung rendah. Pada saat kondisi surut terendah, hasil simulasi menunjukkan konsentrasi MPT yang tinggi (360 - >440 mg/l) tepat di mulut sungai dan menyebar ke bagian utara muara. Sementara itu, di bagian timur dan selatan muara, konsentrasi MPT relatif lebih rendah, berkisar antara 80–240 mg/l. Model hidrodinamika yang diperoleh cukup baik untuk menjelaskan pergerakan arus dan MPT (MAPE <20%).   Ujung Pangkah is the estuary of the Bengawan Solo River which is one of the longest rivers in Indonesia. Administratively, this area is included in the Ujung Pangkah District, Gresik Regency. The flow of the Bengawan Solo River into the estuary carries dissolved sediments in the form of suspended solids which distribution is influenced by current movements. This study aims to determine the pattern of current circulation in the Ujung Pangkah estuary and analyze the effect of current and tidal movements on the distribution of suspended solids. Hydrodynamic model simulation is used in this study with the main data inputs are tides and bathymetry. The results of the study explain that the hydrodynamic model explain the movement of tidal currents with velocities ranging from 0,12 to 0,38 m/s. The distribution pattern shows that high suspended solids concentrations generally occur during low tide conditions, whereas during high tide conditions, suspended solids concentrations tend to be low. At the lowest low tide, the simulation results show high suspended solids concentrations (360 to >440 mg/l) at the estuary and distributed to the northern part of the estuary. Meanwhile, in the eastern and southern parts of the estuary, suspended solids concentrations were relatively lower, ranging from 80–240 mg/l. The hydrodynamic model obtained in this study was sufficient to explain the current movement and MPT (MAPE <20%).

oai:ojs.ejournal.undip.ac.id:article/6931 2014-05-21T02:18:27Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6931 2014-05-21T02:18:27Z Buletin Oseanografi Marina Vol 2, No 2 (2013): Buletin Oseanografi Marina; 7-15 Pramesti, Rini; Jurusan Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, UNDIP 2013-04-18 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6931 en Antioksidan merupakan senyawa yang dapat menghambat reaksi radikal bebas dalam tubuh. Antioksidan sintetis sering digunakan untuk makanan tetapi penggunaannya mulai dibatasi karena beracun. Salah satu alternatif sumber antioksidan alami adalah rumput laut, khususnya C. serrulata karena tanaman ini mengandung pigmen yang dapat digunakan sebagai antioksidan. Penelitian ini bertujuan untuk mengetahui aktivitas antioksidan dan komposisi pigmen dari rumput laut C.  serrulata.. Pengambilan sampel dilakukan dengan metode purposif. Penelitian dilakukan dengan metode deskriptif eksploratif. Hasil penelitian menunjukkan ekstrak rumput laut C. serrulata mempunyai aktivitas antioksidan yang sedang dengan IC50 sebesar 136, 89 ppm. Hasil identifikasi komposisi pigmen didapatkan 10 pigmen yaitu karoten, klorofil a dan b, 3 turunan klorofil, feofitin a, dan 3 xantofil. Kata kunci : Antioksidan, DPPH, Caulerpa serrulata, Klorofil, Pigment.

oai:ojs.ejournal.undip.ac.id:article/27276 2020-09-27T10:49:01Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/27276 2020-09-27T10:49:01Z Buletin Oseanografi Marina Vol 9, No 1 (2020): Buletin Oseanografi Marina; 27-36 https://ejournal.undip.ac.id/index.php/buloma/article/download/27276/0 Supriyantini, Endang; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Munasik, Munasik; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Sedjati, Sri; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Wulandari, Sri Yulina; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Ridlo, Ali; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Mulya, Eka; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2020-04-30 08:00:13 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/27276 Fitoplankton; Keanekaragaman; Indeks Saprobik; Bahan Organik; Pulau Panjang id Indeks saprobik adalah indeks yang digunakan untuk mengetahui status pencemaran suatu perairan dengan menggunakan keberadaan organisme seperti fitoplankton. Tujuan penelitian untuk mengetahui tingkat pencemaran di perairan Pulau Panjang, Jepara berdasarkan indeks saprobik dan komposisi fitoplankton. Metode yang digunakan adalah deskriptif eksploratif.Sampel fitoplankton diambil dari 12 titik sampling di sekitar perairan Pulau Panjang. Pengambilan sampel ditentukan secara purposive sampling. Sampel plankton diperoleh secara aktif menggunakan plankton net dengan mesh size 37 μm diameter 21 cm. Hasil penelitian menunjukkankomposisi fitoplankton di P. Panjang terdiri dari 32 genus, termasuk ke-dalam 4 kelas yaitu Bacillariophyceae (18 genus), Dinophyceae (12 genus), Cyanophyceae (1 genus),Chlorophyceae (1 genus). Indek keanekaragaman dan keseragamannya  termasuk dalam kriteria sedang dan tidak ada genus yang mendominasi. Nilai indeks saprobik berkisar antara 0.0 s/d 0.5, yaitu dengan tingkat pencemaran ringan (β/α- mesosaprobik) hingga sedang (α/β- mesosaprobik) oleh bahan organik.Berdasarkan hasil tersebut perairan P. Panjang, Jepara termasuk kedalam perairan yang tercemar rendah hingga sedang. A saprobic index is an index used to determine the status of pollution in waters by using the presence of organisms such as phytoplankton. The purpose of this study was to determine the level of pollution in the waters of Island Panjang, Jepara, based on the saprobic index and phytoplankton composition. The method used is descriptive explorative. Phytoplankton samples were taken from 12 sampling points around Panjang Island by a purposive sampling method. Plankton sampling was carried out using the plankton net with a mesh size of 37 μm in diameter of 21 cm. The results showed that there were 4 classes in  Panjang Island, namely Bacillariophyceae (18 genera), Dinophyceae (12 genera), Cyanophyceae (1 genus), Chlorophyceae (1 genus).  The index of diversity and uniformity are moderate and no dominant genus. The saprobic index was ranged from 0.0 to 0.5, which was light (β / α-mesosaprobic) to moderate (α / β-mesosaprobic) pollution levels of organic matter. Based on the results,  Panjang Island waters in Jepara were polluted in low to-moderate category.

oai:ojs.ejournal.undip.ac.id:article/52393 2023-11-04T02:49:24Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/52393 2023-11-04T02:49:24Z Buletin Oseanografi Marina Vol 12, No 3 (2023): Buletin Oseanografi Marina; 447-455 Simanjuntak, Bryan Felix; Departemen Ilmu dan Teknologi Kelautan, Fakultas Perikanan dan Ilmu Kelautan, IPB University Pujiyati, Sri; Departemen Ilmu dan Teknologi Kelautan, Fakultas Perikanan dan Ilmu Kelautan, IPB University Solikin, Steven; Departemen Ilmu dan Teknologi Kelautan, Fakultas Perikanan dan Ilmu Kelautan, IPB University Lubis, Muhammad Zainuddin; Program Studi Teknik Geomatika, Jurusan Teknik Informatika, Politeknik Negeri Batam 2023-10-01 08:57:45 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/52393 Hamburbalik; Perairan Punggur; Side Scan Sonar id Deteksi objek dasar perairan merupakan proses analisa objek yang menggunakan kemampuan teknologi sonar. Side scan sonar (SSS) adalah alat yang menggunakan komponen satu beam (Single beam) yang dapat menampilkan citra dalam bentuk dua dimensi (2D). Tujuan dari penelitian ini adalah menganalisis dan mendeteksi objek dasar di Perairan Punggur Batam. Penggunaan data side scan sonar sangat efisien dalam mengidentifikasi Perairan Punggur Batam. Data side scan sonar dengan format Xtf diproses dengan menggunakan koreksi radiometrik dan geometrik melalui perangkat lunak SonarWiz 7 untuk mendapatkan klasifikasi citra. Proses ekstraksi data menggunakan perangkat lunak SeiSee 2.2 untuk menampilkan nilai amplitudo dan waktu. Trace diambil sesuai nomor ping target. Trace data dikonversi ke dalam format txt atau xls kemudian data trace diinput ke dalam perangkat lunak Matlab r2017a untuk menampilkan grafik amplitudo (mV). Analisis hamburbalik menggunakan perhitungan logaritma yaitu 20Log10 (Vt/V0) dengan Vt merupakan dominan dan V0 amplitudo maksimum. Berdasarkan hamburbalik SSS di perairan Punggur Batam diperoleh 6 target yang memiliki nilai hamburbalik -3,32 dB, -5,71 dB, -1,13 dB, -6,81 dB, -4,86 dB, dan -3,74 dB. Nilai hamburbalik digunakan untuk menduga jenis target yang ada di perairan Punggur, yaitu karang besar, karang sedang, batu besar, batu sedang, serta batu cukup besar. Besar kecilnya nilai hamburbalik yang didapatkan dipengaruhi oleh amplitudo target.  Detection of underwater objects is an object analysis process that uses the capabilities of sonar technology. Side scan sonar is a tool that uses Single beam which can display images in two dimensions (2D). The purpose of this study is to analyze and detect objects on the bottom of the waters. The use of side scan sonar data is very efficient in identifying Punggur Batam Waters. Side scan sonar (SSS) data in Xtf format was processed using radiometric and geometric corre ctions with SonarWiz 7 software to obtain image classifications. The data extraction process used SeiSee 2.2 software to show the amplitude and time values. Traces were taken based on the target ping number. The trace data were converted into txt or xls format then the trace data was inputted into the Matlab r2017a software to show an amplitude (mV) graph. The backscatter analysis used a logarithmic calculation, 20Log10 (Vt/V0) with Vt being the dominant and V0 being the maximum amplitude. Based on the SSS backscattering in the waters of Punggur Batam we got 6 targets which had backscatter values about -3.32 dB, -5.71 dB, -1.13 dB, -6.81 dB, -4.86 dB, and -3.74 dB. The backscatter value is used to estimate the types of targets in Punggur waters, namely large corals, medium corals, large rocks, medium rocks, and quite large rocks. The size of the backscatter value was influenced by the target amplitude.

oai:ojs.ejournal.undip.ac.id:article/27223 2021-02-01T08:06:29Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/27223 2021-02-01T08:06:29Z Buletin Oseanografi Marina Vol 10, No 1 (2021): Buletin Oseanografi Marina; 51-60 Wismar, Jan Ericson; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Setyati, Wilis Ari; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Riniatsih, Ita; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2021-02-01 10:08:08 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/27223 Blue carbon; Padang lamun; Simpanan karbon id Konsep blue carbon adalah salah satu upaya untuk mengurangi emisi gas karbon pemicu pemanasan global dengan cara memanfaatkan vegetasi pesisir sebagai penyerap karbon. Ekosistem lamun merupakan salah satu ekosistem pesisir yang dapat menyerap  karbon dalam jumlah besar. Penelitian ini bertujuan untuk mengetahui kondisi lamun dan kandungan karbon pada lamun di Perairan Pulau Besar Utara, Maumere, Sikka.  Pengamatan lamun menggunakan transek kuadrat 50x50cm menurut panduan LIPI. Sampling lamun dilakukan acak menggunakan seagrass core berdiameter 15 cm di setiap lokasi. Perhitungan kandungan karbon menggunakan metode Loss On Ignition (LOI) yang kemudian dikonversikan dengan nilai biomassa pada setiap titiknya. Jenis lamun yang ditemukan sebanyak 4 spesies yaitu Enhalus acoroides, Thalassia hemprichii,, Cymodocea rotundata,dan Syringodium isoetifolium. Lokasi pengamatan memiliki tutupan lamun sangat padat. Nilai biomassa dibawah  dan diatas substrat pada lokasi pengamatan didapat nilai 424,60 gbk/m2  dan 79,67 gbk/m2. Total kandungan karbon pada lokasi pengamatan  adalah 41,95 gC/m2. Kandungan karbon terbesar disimpan pada jaringan lamun (akar dan rhizoma) dengan spesies E. acoroides sebagai penyumbang nilai biomassa  dan kandungan karbon tertinggi. Lokasi perairan Pulau Besar Utara, Maumere memiliki kondisi perairan yang baik dengan kerapatan lamun yang tinggi, secara umum kandungan karbon yang terdapat pada perairan tersebut memiliki kandungan yang tinggi. Kondisi lamun yang baik akan memiliki simpanan karbon yang baik dan hal ini merupakan salah satu upaya dalam mitigasi perubahan iklim sekaligus menjaga kelestarian laut.  The concept of blue carbon is one of the efforts to reduce carbon gas emissions that trigger global warming by utilizing coastal vegetation as a carbon sink. Seagrass ecosystems are one of the coastal ecosystems that can absorb large amounts of carbon. This study aims to find seagrass conditions and carbon content in seagrasses on the waters of Besar Utara Island, Maumere, Sikka. Seagrass observations used a 50x50cm quadrant transect according to the LIPI guideline, 2017. Seagrass sampling was using seagrass cores with 15cm diameter in each location. Calculation of carbon content using the Loss On Ignition (LOI) method which is then converted to biomass values at each point. Seagrass species found in location sampling were 4 species, namely Enhalus acoroides, Thalassia hemprichii, Cymodocea rotundata, and Syringodium isoetifolium. The Location  has very dense seagrass cover. Biomass values below and above the substrate at location sampling (424.60 gbk / m2 and 79.67 gbk / m2). The total carbon content in location sampling is 41.95 gC / m2. The largest carbon content is stored in seagrass tissues (roots and rhizomes) with E. acoroides as a contributor to the highest biomass and carbon content. The location of Besar North island, Maumere has good water conditions with high seagrass density, in general the carbon storage at the location of Besar North island is high condition. Seagrass with good condition will have good carbon storage and this is one of the efforts in mitigating climate change at once preserving the sea.

oai:ojs.ejournal.undip.ac.id:article/63278 2024-11-04T07:16:45Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/63278 2024-11-04T07:16:45Z Buletin Oseanografi Marina Vol 13, No 3 (2024): Buletin Oseanografi Marina; 341-350 Rahmawati, Nur Shafira; Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Bengkulu Mitigation and Exploration Laboratory, Universitas Bengkulu Farid, Muchammad; Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Bengkulu Pusat Studi Mitigasi Bencana, Universitas Bengkulu Mitigation and Exploration Laboratory, Universitas Bengkulu Refrizon, Refizon; Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Bengkulu Al Ansory, Andre Rahmat; Mitigation and Exploration Laboratory, Universitas Bengkulu 2024-10-30 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/63278 abrasi; perubahan garis pantai; MASW; citra satelit; mitigasi id Desa Urai merupakan salah satu desa yang terkena dampak abrasi parah di Kabupaten Bengkulu Utara. Abrasi yang terjadi menyebabkan perubahan garis pantai sehingga mengakibatkan kerusakan sarana dan prasarana yang ada di pantai. Pada riset ini memperoleh data primer menggunakan metode MASW dan data sekunder berupa data garis pantai pesisir Desa Urai selama 16 tahun (2006-2022) dengan menggunakan citra satelit. Analisis perubahan garis pantai Desa Urai, Kabupaten Bengkulu Utara dari 2006 hingga 2022 menunjukkan adanya abrasi signifikan. Titik-titik utama mengalami abrasi sekitar ±8 meter/tahun, sedangkan titik dengan perlindungan pantai memiliki abrasi minimal, hanya sekitar 0,1-0,5 meter/tahun. Ini menunjukkan keberhasilan infrastruktur perlindungan pantai dalam mengurangi dampak abrasi. Penelitian menemukan perubahan garis pantai rata-rata ±8 meter/tahun. Analisis menggunakan MASW dan citra satelit menunjukkan abrasi terparah di titik 1, 2, 4, 6, dan 8 (±3,4-8 meter/tahun), sedangkan titik 3 dan 7 mengalami abrasi paling rendah (±0,1-0,5 meter/tahun). Struktur batuan pada kedalaman ±30 meter terdiri dari 3 lapisan. Penelitian bertujuan untuk mitigasi bencana abrasi demi pembangunan berkelanjutan dari pemerintah provinsi hingga desa di Desa Urai, Kabupaten Bengkulu Utara. Urai Village is one of the villages affected by severe abrasion in North Bengkulu Regency. The abrasion that occurs causes changes in the coastline, causing damage to the facilities and infrastructure on the beach. In this research, primary data was obtained using the MASW method and secondary data in the form of coastal coastal data of Urai Village for 16 years (2006-2022) using satellite imagery. Analysis of changes in the coastline of Urai Village, North Bengkulu Regency from 2006 to 2022 showed significant abrasion. The main points experience abrasion of about ±8 meters/year, while the points with coastal protection have minimal abrasion, only about 0.1-0.5 meters/year. This shows the success of coastal protection infrastructure in reducing the impact of abrasion. Research found an average change in the coastline of ±8 meters/year. Analysis using MASW and satellite imagery showed the worst abrasion at points 1, 2, 4, 6, and 8 (±3.4-8 meters/year), while points 3 and 7 experienced the lowest abrasion (±0.1-0.5 meters/year). The rock structure at a depth of ±30 meters consists of 3 layers. The research aims to mitigate abrasion disasters for sustainable development from the provincial government to the village in Urai Village, North Bengkulu Regency.

oai:ojs.ejournal.undip.ac.id:article/11292 2020-04-17T12:01:36Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/11292 2020-04-17T12:01:36Z Buletin Oseanografi Marina Vol 5, No 1 (2016): Buletin Oseanografi Marina; 21-30 Prasetyawan, Indra Budi; Program Studi Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2016-04-03 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/11292 en The origin and evolution of  back-arc spreading in the eastern edge of Scotia Plate will be discussed in this paper. The Scotia Plate is a tectonicplate on the edge of the South Atlantic and Southern Ocean, located between the South American and Antartic plates. The East Scotia Ridge (ESR) in the eastern edge of Scotia Plate, forned due to subduction of the South American plate beneath the South Sandwich plate along the South Sandwich Island arc. The methods and techniques of data acquisition used were data from absolution motions and data from magnetic anomalies and bathymetric data. Magnetic anomalies and  bathymetric data that used in this paper consist of two sets data. First, magnetic anomalies and  bathymetric data which were obtained by aboard HMS Endurance in the 1969-70 austral summer, and the second, magnetic anomalies and  bathymetric data which were obtained after removal of the International Geomagnetic Reference Field (IGRF). Absolution motion analyses in the subduction zones of Sandwich plate results that form back-arc spreading in East Scotia Ridge showing high deformation for slow moving upper plates. Where back-arc spreading is associated with upper plate retreat that reaches 26.9 mm/year and have back-arc deformation style consistent with upper plate absolute. Key Words: Geological oceanography, Scotia plate, back-arc spreading

oai:ojs.ejournal.undip.ac.id:article/35906 2022-05-20T01:15:04Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/35906 2022-05-20T01:15:04Z Buletin Oseanografi Marina Vol 11, No 1 (2022): Buletin Oseanografi Marina; 51-58 Salimah, Faiz Naida; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Santosa, Gunawan Widi; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Ridlo, Ali; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2022-01-30 16:19:36 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/35906 Dunaliella salina; Pigmen; Pertumbuhan; Tembaga (Cu) id Dunaliella salina merupakan mikroalga hijau yang memiliki peran penting dalam rantai makanan di lingkungan perairan dan kandungan pigmennya telah banyak dimanfaatkan. Pertumbuhan dan kandungan biomolekul  D. salina dipengaruhi oleh kondisi lingkungan hidupnya, salah satunya mikronutrien tembaga (Cu). Penelitian ini bertujuan untuk mengetahui pengaruh konsentrasi Cu dalam media terhadap pertumbuhan dan kandungan pigmen D. salina. Penelitian ini menggunakan metode eksperimental dengan Rancangan Acak Lengkap (RAL) menggunakan 1 perlakuan dengan 4 taraf perlakuan (3 kali ulangan). Perlakuan yang diberikan adalah penambahan Cu dengan konsentrasi 1, 3, dan 5 ppm kedalam media kultur D. salina dan tanpa penambahan atau kontrol. Analisis kadar pigmen klorofil-a,b dan total karotenoid dilakukan menggunakan metode spektroskopi. Hasil penelitian menunjukkan bahwa penambahan konsentrasi Cu yang berbeda pada media memberikan pengaruh nyata (p≤0,05) terhadap laju pertumbuhan mikroalga dan kadar pigmen D. salina. Laju pertumbuhan tetinggi dicapai pada perlakuan B (penambahan 1 ppm) sebesar 0,44±0,03 sel/hari dan terendah pada perlakuan D (penambahan 5 ppm) sebesar 0,26±0,04 sel/hari. Kadar pigmen tertinggi diperoleh pada perlakuan A (kontrol/tanpa penambahan) dengan klorofil-a sebesar 18,04±1,80 μg/mL, klorofil-b sebesar 9,03±0,87 μg/mL, serta total karotenoid 5,66±0,80 μg/mL dan terendah pada perlakuan D (penambahan 5 ppm) dengan klorofil-a sebesar 7,56±1,30 μg/mL, klorofil-b 3,91±0,90 μg/mL serta total karotenoid 2,12±0,37 μg/mL. Semakin tinggi konsentrasi Cu yang ditambahkan maka laju pertumbuhan dan kadar pigmen D. salina semakin menurun. Efek toksik Cu terhadap laju pertumbuhan dan kadar pigmen secara signifikan mulai terjadi dari penambahan 3 ppm Cu ke dalam media.  Dunaliella salina is a green microalga that has an important role in the food chain in aquatic environments and its pigment content has been widely utilized. The growth and content of biomolecules D. salina are influenced by environmental conditions, one of which is the micronutrient copper (Cu). This study used an experimental method with a completely randomized design (CRD) using 1 treatment with 4 levels of treatment (3 replications). The treatment given was the addition of Cu with a concentration of 1, 3, and 5 ppm into the D. salina culture media and without addition or control. Analysis of the levels of chlorophyll-a, b, and total carotenoid pigments was carried out using a spectroscopic method. The results showed that the addition of different Cu concentrations in the media had a significant effect (p≤0,05) on the growth rate of microalgae and the pigment levels of D. salina. The highest growth rate was achieved in treatment B (addition of 1 ppm) of 0,44±0,03 cell/day and the lowest was in treatment D (addition of 5 ppm) of 0,26 ± 0,04 cell/day. The highest pigment content was obtained in treatment A (control) with chlorophyll-a of 18,04±1,80 μg/mL, chlorophyll-b of 9,03±0,87 μg/mL, and total carotenoids 5,66±0,80 μg/mL and the lowest in treatment D (addition of 5 ppm) with chlorophyll-a of 7,56±1,30 μg/mL, chlorophyll-b 3,91±0,90 μg/mL and total carotenoids 2,12±0,37 μg/mL. The higher the Cu concentration was added, the lower the growth rate and pigment levels of D. salina. The toxic effect of Cu on the growth rate and pigment levels was significant from the addition of 3 ppm Cu into the media.

oai:ojs.ejournal.undip.ac.id:article/66481 2026-02-11T04:49:13Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/66481 2026-02-11T04:49:13Z Buletin Oseanografi Marina Vol 14, No 2 (2025): Buletin Oseanografi Marina; 213-222 Berlin, Wisnu Sanjaya; Departemen Ilmu Kelautan, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Tanjungpura Muliadi, Muliadi; Departemen Geofisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Tanjungpura Apriansyah, Apriansyah; Departemen Ilmu Kelautan, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Tanjungpura 2025-06-10 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/66481 sedimen dasar; arus; tinggi gelombang signifikan; pasang surut; Perairan pantai Desa Jawai Laut id Perairan pantai Desa Jawai Laut memiliki potensi ekonomi yang besar, dengan aktifitas perekonomian masyarakat meliputi pariwisata, perikanan tangkap, dan budidaya rumput laut. Aktivas perekonomian masyarakat mendapatkan pengaruh dari abrasi yang terjadi di perairan tersebut. Proses abrasi yang terus berlangsung mengubah pola distribusi sedimen, yang dapat mengakibatkan penurunan kualitas habitat dan berdampak negatif pada kegiatan ekonomi lokal. Penelitian ini bertujuan untuk mengidentifikasi karakteristik sedimen dasar serta faktor-faktor oseanografi yang mempengaruhinya di Perairan Pantai Desa Jawai Laut. Metode analisis karakteristik sedimen menggunakan metode granulometri dan pendekatan statistik ukuran butir. Titik stasiun pengambilan sampel sedimen berjumlah 8 stasiun. Data pendukung meliputi pasang surut, tinggi gelombang signifikan, dan kecepatan arus. Berdasarkan hasil penelitian sebaran fraksi sedimen didominasi oleh jenis sedimen pasir. Nilai ukuran butir rata-rata berkisar di antara 1,72 φ – 2,98  φ dengan kategori pasir halus dan pasir sedang. Nilai sortasi berkisar antara 0,6 φ - 1,08 φ dengan kategori terpilah buruk, terpilah sedang dan terpilah cukup baik. Nilai skewness berkisar antara 4,29 φ - 6,65 φ dengan kategori sangat halus, nilai kurtosis berkisar antara 0,68 φ - 1,04 φ dengan kategori platykurtik dan mesokurtik. Kecepatan arus rata-rata 0,0373 m/s, pola pasang surut campuran condong harian ganda, dan tinggi gelombang signifikan berkisar antara 0,276 - 0,72 meter, dengan tinggi rata-rata bulanan 0,443 meter. Sebaran ukuran butir sedimen di perairan pantai Desa Jawai Laut dipengaruhi oleh arus dan gelombang.  The coastal waters of Jawai Laut Village have great economic potential, with community economic activities including tourism, capture fisheries, and seaweed cultivation. The economic activities of the community are influenced by the abrasion that occurs in these waters. Ongoing abrasion processes change sediment distribution patterns, which can result in degradation of habitat quality and negatively impact local economic activities. This study aims to identify the characteristics of bottom sediments and the oceanographic factors that influence them in the coastal waters of Jawai Laut Village. The methods used in this study are granulometry method and grain size statistical approach. Sediment sampling was conducted at 8 stations. Supporting data for this study includes tidal patterns, significant wave height, and current speed. The results showed the distribution of sediment fractions is dominated by sand sediment types. Average grain size ranges from 1,72 φ – 2,98 φ, classified as fine sand and medium sand, sorting values range from 0,6 φ – 1,08 φ, classified as poorly sorted, moderately sorted and moderately well sorted, skewness value ranges from 4,29 φ – 6,65 φ classified as very fine skewed, kurtosis value ranges from 0,68 φ – 1,04 φ classified as platykurtic and mesokurtic. An average current speed of 0,0373 m/s, mixed tide prevailing semi-diurnal as tidal pattern, and significant wave heights ranging from 0,276 – 0,72 meters, with a monthly average height of 0,443 meters. The grain size distribution of sediments in the coastal waters of Jawai Laut Village is influenced by currents and waves.

oai:ojs.ejournal.undip.ac.id:article/16569 2020-04-17T12:04:53Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/16569 2020-04-17T12:04:53Z Buletin Oseanografi Marina Vol 6, No 2 (2017): Buletin Oseanografi Marina; 117-121 Taufiq-Spj, Nur; Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Definta, Virda Maya; Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Ario, Raden; Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2017-11-18 00:38:57 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/16569 Sidat; Anguilla bicolor bicolor; Volume Air; pertumbuhan; stadia awal elver; Eel; Anguilla bicolor bicolor; Water Volume; Growth; early elver. en Budidaya ikan sidat (Anguilla sp.) di Indonesia baru mulai berkembang beberapa tahun belakangan meskipun ikan ini memiliki banyak prospek di berbagai negara Asia maupun Eropa. Kegiatan budidaya yang dilakukan di beberapa daerah baru pada taraf pembesaran pada kolam persawahan (earthen pond) dan hanya sebagian kecil yang menggunakan sistim resirkulasi. Penelitian ini bertujuan untuk mengetahui pengaruh volume air terhadap pertumbuhan panjang dan berat ikan sidat (Anguilla bicolor bicolor) stadia awal dari elver dengan sistim budidaya resirkulasi. Metode eksperimental digunakan dalam penelitian ini dengan Rancangan Acak Lengkap (RAL) menggunakan 3 perlakuan volume air yang berbeda (E: 942 l, F: 1413 l, dan G: 750 l). Sampling panjang dan berat dilakukan setiap 2 minggu selama 8 minggu budidaya. Hasil penelitian pertumbuhan panjang dan berat tiap Kolam menunjukkan nilai yang tidak berbeda nyata (α > 0.05). Pertumbuhan Mutlak (berat) pada kolam E: 33,33 g, F: 23,33 g, dan kolam G: 40,00 g, sementara pertumbuhan mutlak (panjang) pada kolam E: 8,67 cm, F: 7,67 cm, serta kolam G: 9,50 cm selama 8 minggu budidaya. Hasil dari perhitungan Spesific Growth Rate (SGR) pada kolam E: 0,48; F:0,33 dan G: 0,57 %/hari selama 70 hari budidaya. Pertumbuhan panjang dan berat ikan sidat pada percobaan ini mempunyai hubungan yang sangat kuat dengan korelasi antara 83,5 – 94,5%. Hasil percobaan ini dapat disimpulkan bahwa pertumbuhan sidat stadia awal elver akan meningkat dengan menurunnya volume air pada kondisi suhu optimum 28±2 ºC. The eel (Anguilla sp.) cultivation in Indonesia recently has just begun to develop, eventhough this species has so many economic prospect especially in eastern Asia and European countries. Aquaculture activities in some province (of Indoesia) still using earthen pond and only certain places which used Resirculating Aquaculure System (RAS) for racing the local eels. The aims of this study were to determine the effect of water volume on early elver of Anguilla bicolor bicolor length and weight growth and it’s corelations. Experimental method was used, complitely random design with 3 treatments of different water volumes i.e. E: 942 liter, F: 1413 liter, and G: 750 l. Sampling were taken every fortnight during 8 weeks culture. The results shows that length and weght growth have no significantly different (α > 0.05). Absolute growth (of weight) in each tank i.e. E: 33.33 g, F: 23.33 g, and G: 40.00 g, meanwhile the length absolute growth i.e. E: 8.67 cm, F: 7.67 cm, and G: 9.50 cm. Spesific growth rate of early elver were: E = 0.48, F=0.33 and G= 0.57 ini % d-1 during 70 d culture. Length and weght growth have a tight correlation i.e. 83.5 to 94.5%. The results of this study indicate that the growth of early eel (Anguilla bicolor bicolor) increased by decreasing water volume in the optimum water temperature of 28±2 ºC.

oai:ojs.ejournal.undip.ac.id:article/40871 2023-05-13T09:22:51Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/40871 2023-05-13T09:22:51Z Buletin Oseanografi Marina Vol 12, No 1 (2023): Buletin Oseanografi Marina; 9-19 Ahmed, Yasser; Yayasan KEHATI Jakarta Program Studi Biologi, Fakultas Sains dan Teknologi, Universitas Islam As-Syafiiyah Kurniawan, Cahyadi Adhe; Yayasan IKAMaT Efendi, Ganis Riyan; Yayasan IKAMaT Pribadi, Rudhi; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Nainggolan, Frans Alexander; KeSEMaT Samudra, Mohamad Bangkit Gunung Surya; KMPHP Mangrovesari Brebes 2023-02-04 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/40871 Mangrove; Karbon; Rehabilitasi; Konservasi id Ekosistem mangrove sangat rentan terhadap kerusakan yang ditimbulkan baik oleh bencana alam maupun karena ulah manusia. Salah satu kegiatan yang dapat dilakukan untuk memperbaiki kondisi ekosistem mangrove adalah dengan melakukan rehabilitasi mangrove. Hal ini cukup penting dilakukan mengingat ekosistem mangrove sangat baik dalam proses penyerapan gas CO2 diudara. Penelitian ini bertujuan untuk mengetahui seberapa besar hutan mangrove di pesisir Desa Kaliwlingi mampu menyerap karbon dari udara berdasarkan tahun tanam rehabilitasi mangrove. Penelitian ini dilakukan pada bulan Januari 2021 dengan menggunakan metode deskriptif. Metode pengambilan data karbon mangrove mengacu pada panduan pengukuran dan penghitungan cadangan karbon dari Standar Nasional Indonesia (SNI 7724:2011) tahun 2011. Pengambilan data karbon meliputi karbon atas permukaan (above ground), bawah permukaan (below ground) dan sedimen.  Perhitungan nilai kandungan biomassa berdasarkan rumus allometrik tiap spesies dan uji laboratorium untuk sampel sedimen. Nilai total estimasi cadangan karbon atas permukaan (above ground) dan bawah (below ground) yaitu sebesar 660,38 ton/ha dan 417,93 ton/ha, sedangkan untuk estimasi cadangan karbon berdasarkan spesies mangrove yang didominasi oleh Rhizophora mucronata yaitu sebesar 312,075 ton/ha. Nilai total kandungan karbon pada sedimen paling tinggi sebesar 289,08 ton/ha pada stasiun tanam 2005 dan kedalaman 5-10 cm memiliki nilai total karbon paling tinggi sebesar 335,23 ton/ha.  Mangrove ecosystems are very vulnerable to damage caused by both natural and human-made disasters. One of the activities that can be done to improve the condition of the mangrove ecosystem is to carry out mangrove rehabilitation. This is quite important considering that the mangrove ecosystem is very good at absorbing CO2 gas in the air. This study aims to determine how much mangrove forest on the coast of Kaliwlingi Village can absorb carbon from the air based on the planting year of mangrove rehabilitation. This research was conducted in January 2021 using a descriptive method. Method of mangrove carbon data collection refers to the guideline for measuring and calculating carbon stocks from the Indonesian National Standard (SNI 7724:2011) in 2011. Carbon data collection includes above ground (above ground), below ground (below ground), and sediment. The calculation of the value of the biomass content is based on the allometric formula for each species and laboratory tests for sediment samples. The total value of the estimated above-ground and below-ground carbon stocks is 660.38 tons/ha and 417.93 tons/ha, while the estimated carbon stocks are based on mangrove species dominated by Rhizophora mucronata are 312.075 tons. /Ha. The highest total value of carbon content in sediments was 289.08 tons/ha at the 2005 planting station and a depth of 5-10 cm had the highest total carbon value of 335.23 tons/ha.

oai:ojs.ejournal.undip.ac.id:article/6922 2014-05-20T04:25:07Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6922 2014-05-20T04:25:07Z Buletin Oseanografi Marina Vol 2, No 1 (2013): Buletin Oseanografi Marina; 17-23 Febriyantoro, Febriyantoro; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Riniatsih, Ita; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Endrawati, Hadi; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2013-01-20 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6922 en Lamun adalah sumber makanan bagi beberapa jenis herbivora seperti penyu, dugong dan beberapa jenis invertebrata. Fungsi lamun tidak banyak dipahami, banyak padang lamun yang rusak oleh berbagai aktivitas manusia.Lamun berkurang secara cepat di berbagai belahan dunia akibat dari kegiatan manusia seperti kerusakan secara mekanis (pengerukan dan jangkar), eutrofikasi, budidaya perikanan, pengendapan, pengaruh pembangunan konstruksi pesisir, dan perubahan jaring makanan.Tujuan dari penelitian ini adalah mengetahui tingkat keberhasilan transplantasi lamun berdasar laju pertumbuhan dan tingkat keberlangsungan hidup (SR) dengan dengan penerapan metode Frame tabung bambu, Plugs, Fastening waring di perairan Prawean Bandengan Jepara agar lamun dapat dikembangkan dengan teknologi ramah lingkungan yaitu menggunakan bambu dan keberadaanya masih tetap lestariPenelitian dilakukan dengan observasi lapangan selama 6 Minggu pada tanggal 17 September – 1 November 2012 . Metode yang digunakan untuk analisis  adalah metode eksperimental yang dilakukan di lapangan. Berdasarkan hasil One-way ANOVA, diketahui bahwa laju pertumbuhan transplantasi lamun dari ketiga metode tersebut tidak berbeda nyata. Tingkat keberhasilan unit transplantasi lamun untuk metode Frame Tabung Bambu sebesar 95%, metode Plugs sebesar 100%dan metode Fastening Waring sebesar 100%. Laju pertumbuhan unit transplantasi lamun di Perairan Prawean Bandengan Jepara dengan metode Frame Tabung Bambu memliki rata-rata sebesar (0,70 cm/hari ± 0.06), sedangkan untuk metode Plugs sebesar (0,78 cm/hari ± 0.09) dan metode Fastening Waring sebesar (0,71 cm/hari ± 0.05). Kata Kunci : Perairan Prawean Bandengan Jepara, Transplantasi lamun, metode Frame Tabung Bambu, metode Plugs, metode Fastening Waring.

oai:ojs.ejournal.undip.ac.id:article/75637 2026-02-11T19:03:18Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/75637 2026-02-11T19:03:18Z Buletin Oseanografi Marina Vol 15, No 1 (2026): Buletin Oseanografi Marina; 70-80 https://ejournal.undip.ac.id/index.php/buloma/article/download/75637/249179 https://ejournal.undip.ac.id/index.php/buloma/article/download/75637/249180 Rezeki, Maulidhia Srie; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran MS, Yuniarti; Departemen Kelautan. Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran Taofiqurohman, Ankiq; Departemen Kelautan. Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran Sari, Qurnia Wulan; Departemen Kelautan. Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran 2026-02-25 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/75637 Sedimentasi; Arus; Pasang Surut; Mundu id Sedimentasi di wilayah pesisir merupakan permasalahan lingkungan yang kompleks dan dapat terjadi secara berkelanjutan, terutama di daerah yang memiliki interaksi kuat antara faktor hidrodinamika dan aktivitas darat. Kabupaten Cirebon, khususnya Kecamatan Mundu, menghadapi suatu tantangan besar akibat sedimentasi yang salah satu faktornya disebabkan oleh faktor hidro-oseanografi berupa arus dan pasang surut. Penelitian ini bertujuan untuk mengidentifikasi karakteristik sedimen berdasarkan faktor hidro-oseanografi arus dan pasang surut serta menganalisis transpor sedimen dan laju sedimentasi di Perairan Mundu. Metode penelitian menggunakan metode kuantitatif dengan pendekatan data sedimen, arus, dan pasang surut. Hasil dari penelitian menunjukkan bahwa jenis sedimen di Perairan Mundu berjenis lumpur dengan dominansi fraksi contoh sedimen pada setiap stasiun adalah butiran halus (>70%). Pasang surut di wilayah penelitian berkategori campuran condong harian ganda dengan energi arus didominansi oleh arus pasut. Kondisi tersebut menjadikan sedimen di Perairan Mundu bertransportasi secara suspension pada saat kecepatan arus maksimum (1,76 – 2,06 cm/s), dan deposisition in suspension saat arus minimum (0,06 - 0,18 cm/s). Hasil lain dalam penelitian ini menunjukkan bahwa laju sedimentasi memiliki rentang nilai 7,74 - 28,27 kg/m2/hari dan nilai paling besar ditemukan pada stasiun yang dekat dengan pesisir. Dominansi arah laju sedimentasi berasal dari arah utara (Cirebon Utara) yang mengindikasikan adanya sedimentasi yang mengarah ke daratan Mundu.  Coastal sedimentation is a complex environmental problem that can occur continuously, especially in areas with strong interactions between hydrodynamic factors and land activities. Cirebon Regency, especially Mundu District, faces a major challenge due to sedimentation, one of the factors of which is caused by hydro-oceanographic factors in the form of currents and tides. This study aims to identify sediment characteristics based on hydro-oceanographic factors of currents and tides and to analyze sediment transport and sedimentation rates in Mundu Waters. The research method uses a quantitative method with a sediment, current, and tidal data approach. The results of the study indicate that the type of sediment in Mundu Waters is mud with the dominant fraction of sediment samples at each station being fine grains (> 70%). The tides in the study area are categorized as mixed, tending to be double daily with current energy dominated by tidal currents. These conditions cause sediment in Mundu Waters to transport in suspension at maximum current speeds (1,76 – 2,06 cm/s), and deposition in suspension at minimum currents (0,06 - 0,18 cm/s). Other results in this study indicate that the sedimentation rate has a range of values of 7.74 - 28.27 kg / m2 / day and the largest value was found at stations close to the coast. The dominant direction of the sedimentation rate comes from the north (North Cirebon) which indicates sedimentation leading to the Mundu mainland.

oai:ojs.ejournal.undip.ac.id:article/23274 2020-04-17T12:08:00Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/23274 2020-04-17T12:08:00Z Buletin Oseanografi Marina Vol 8, No 2 (2019): Buletin Oseanografi Marina; 116-122 Ario, Raden; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Riniatsih, Ita; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Pratikto, Ibnu; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Sundari, Pratiwi Megah; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2019-10-04 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/23274 Perifiton; C. serrulata; E. acoroides; PulauParang id Keanekaragaman jenis lamun dan struktur morfologi yang cukup besar pada Enhalus acoroides dan Cymodocea serrulata memungkinkan ditumbuhi perifiton dimana dapat meningkatkan produktivitas primer. Penelitian bertujuan untuk mengetahui kelimpahan perifiton dan pola distribusinya serta hubungan kerapatan lamun terhadap kelimpahan perifiton di PulauParang, Karimunjawa. Penelitian yang dilaksanakan pada bulan Oktober 2018 menggunakan metode survei dan penentuan lokasi dipilih dengan menggunakan metode purposive sampling, sedangkan metode pengambilan data lamun melalui metode line transect quadrant yang mengacu pada metode seagrass watch. Pengambilan daun lamun untuk pengamatan perifiton menggunakan metode sapuan daun yang selanjutnya diamati dengan menggunakan metode sensus yaitu pengamatan total dengan alat sedgwick rafter counting chamber di bawah mikroskop. Nilai kelimpahan perifiton pada daun lamun Enhalus acoroides di Stasiun 1, Stasiun 2, dan Stasiun 3 berturut–turut sebesar 2654 sel/cm2, 2831 sel/cm2, 1435 sel/cm2. Sedangkan kelimpahan perifiton pada daun lamun Cymodocea serrulata di Stasiun 1, Stasiun 2, dan Stasiun 3 berurutan sebesar 0 sel/cm2, 2376 sel/cm2, 2890 sel/cm2. Kelimpahan tertinggi perifiton terdapat pada jenis lamun Enhalus acoroides, hal ini diduga karena Enhalus acoroides mempunyai penampang daun yang lebih lebar dan umur jaringan makrofil yang lebih lama. Perifiton yang mendominasi di Pulau Parang berasal dari Kelas Bacillariophyceae, diduga karena kelas ini memiliki kemampuan melekat pada substrat yang baik. Berdasarkan perhitungan Indeks Morisita maka diketahui bahwa sebaran perifiton di Pulau Parang adalah mengelompok. Kelimpahan perifiton dengan kerapatan lamun di Pulau Parang memiliki hubungan cukup erat.   The variety of seagrass types and the morphological structure of Enhalus acoroides and Cymodocea serrulata allows periphyton to be grown. Periphyton can increase primary productivity and help the decomposition process of seagrass. This research aims to determine the periphyton abundance, periphyton distribution and seagrass density relationship towards periphyton abundance in Parang Island, Karimunjawa. This research was conducted on October 2018. The seagrass data was collected by using the line transect quadrant method refers to the seagrasswatch method. Taking seagrass leaf for periphyton observation using the leaf drainage method was then observed using the census method, which is a total observation with sedgwick rafter counting chamber. Periphyton abundance value on seagrass leaves of Enhalus acoroides at Station 1, Station 2, and Station 3 are 2654 cells/ cm2, 2831 cells/ cm2, 1435 cells/ cm2 respectively. While periphyton abundance on the seagrass leaves of Cymodocea serrulata at Station 1, Station 2, and Station 3 are 0 cell/ cm2, 2376 cells/ cm2, 2890 cells/ cm2 respectively. The highest abundance of periphyton was observed on Enhalus acoroides leaves. This is presumably because Enhalus acoroides has a wider leaf section and longer age of macrophilic system. Periphyton that dominates in Parang Island comes from Class Bacillariophyceae. This is likely because this class has the ability to attach on a good substrate. Based on the calculation of the Morisita Index, it is known that the periphyton distribution in Parang Island is clustered. Periphyton abundance showed a strong relation with the seagrass density.

oai:ojs.ejournal.undip.ac.id:article/41095 2024-05-31T07:50:39Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/41095 2024-05-31T07:50:39Z Buletin Oseanografi Marina Vol 13, No 1 (2024): Buletin Oseanografi Marina; 63-69 Pramastuti, Fransisca Ria; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Supriyantini, Endang; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Pramesti, Rini; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Sedjati, Sri; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Ridlo, Ali; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2024-02-06 14:07:57 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/41095 Kitosan; Karboksimetil Kitosan; Adsorpsi; Kerang hijau id Logam besi (Fe) merupakan logam berat essensial yang dibutuhkan oleh makhluk hidup termasuk manusia dalam jumlah sedikit.  Jika jumlahnya melebihi batas ambang dapat menimbulkan efek racun karena bersifat karsinogenik. Salah satu upaya mengurangi kadar logam Fe pada daging kerang tersebut dapat dilakukan dengan memanfaatkan kitosan atau turunan kitosan yaitu karboksimetil kitosan (KMK) sebagai adsorben. Penelitian ini bertujuan mengetahui pengaruh variasi konsentrasi KMK dan kitosan terhadap kapasitas dan daya adsorpsi, serta konsentrasi terbaik dalam menurunkan kandungan logam berat Fe pada jaringan lunak kerang hijau. Metode penelitian secara eksperimental laboratoris. Rancangan penelitian menggunakan Rancangan Acak Lengkap (RAL) dengan 2 faktor. Faktor pertama yaitu sumber kitosan yang digunakan yaitu kitosan dan karboksimetil kitosan (KMK) dan faktor kedua yaitu variasi konsentrasi yaitu kontrol (0%); 0,5%; 1%; 1,5% dan masing-masing perlakuan dengan 3 ulangan. Konsentrasi logam berat Fe awal pada kerang hijau sebesar 13,17 mg/kg. Hasil penelitian menunjukkan adanya pengaruh variasi konsentrasi kitosan dan KMK terhadap kapasitas dan daya adsorpsi logam berat Fe pada jaringan lunak kerang hijau. Konsentrasi terbaik pada kitosan 1,5% dapat menurunkan logam berat Fe menjadi 2,43 mg/kg dengan kapasitas adsorpsi sebesar 0,72 mg/g dan daya serap 81,56%, sedangkan KMK 1,5% dapat menurunkan logam berat Fe menjadi 3,68 mg/kg dengan kapasitas adsorpsi 0,63 mg/g dan daya serap sebesar 72,04%.  Fe is an essential heavy metal needed by humans in small amounts, if the amount exceeds the threshold, it can cause toxic effects because it is carcinogenic. To reduce the metal content of Fe in mussel meat, it can be done by utilizing chitosan or chitosan derivatives, namely carboxymethyl chitosan (KMK) as an adsorbent. This study aims to determine the effect of variations in the concentration of KMK and chitosan on the adsorption capacity and power as well as the best concentration in reducing the heavy metal content of Fe in the soft tissue of green mussels. The research method is experimental laboratory. The research design used a completely randomized design (CRD) with 2 factors. The first factor is the source of chitosan used, namely chitosan and carboxymethyl chitosan (KMK) and the second factor is the variation in concentration used, namely control (0%), 0.5%, 1%, and 1.5% and each treatment 3 repetition. The initial heavy metal concentration of Fe in green mussels was 13.17 mg/kg. The results showed that there was an effect of variations in the concentration of chitosan and KMK on the capacity and adsorption ability of heavy metal Fe in green mussel meat. The best concentration of 1.5% chitosan can reduce heavy metal Fe to 2,43 mg/kg with adsorption capacity of 0.72 mg/g and absorption ability of 81.56%. Meanwhile, KMK 1.5% can reduce heavy metal Fe to 3.68 mg/kg with adsorption capacity of 0.63 mg/g and absorption ability of 72.04%. 

oai:ojs.ejournal.undip.ac.id:article/27346 2021-02-01T08:06:00Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/27346 2021-02-01T08:06:00Z Buletin Oseanografi Marina Vol 9, No 2 (2020): Buletin Oseanografi Marina; 150-156 Hendrayana, Hendrayana; Universitas Jenderal Soedirman Ambariyanto, Ambariyanto; Departemen Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Pringgenies, Delianis; Departemen Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Mujiyanto, Mujiyanto; Balai Riset Pemulihan Sumber Daya Ikan, Kementerian Kelautan dan Perikanan 2020-10-15 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/27346 Perifiton; Lamun; Enhalus acoroides; Kelimpahan; Karimunjawa id Kelimpahan perifiton dipengaruhi oleh kerapatan lamun karena pada semakin tinggi kerapatan lamun maka kecepatan arus akan berkurang sehingga dapat meningkatkan laju penempelan perifiton. Penelitian ini bertujuan untuk mengetahui hubungan kerapatan lamun Enhalus acoroides dengan kelimpahan perifiton di Perairan Legon Boyo, Karimunjawa Penelitian ini menggunakan metode deskriptif dan pengambilan sampel menggunakan metode purposive sampling. Penelitian dilakukan pada bulan Juni, September dan Desember Tahun 2012. Hasil penelitian menunjukkan bahwa perifiton yang ditemukan pada lamun Enhalus acoroides di Perairan legon sebanyak 10 jenis dan jenis Baciliarophyceae merupakan jenis perifiton paling banyak ditemukan. Kelimpahan terbesar terjadi di musim peralihan yaitu sebesar 2.146 sel/l. Keanekaragaman jenis perifiton di lamun E. acoroides memiliki nilai antara 0,26-1,43 (Keanekaragaman rendah-sedang), keseragaman dengan nilai 3,61-5,82 (keseragaman tinggi) dan dominansi dengan nilai 0,68-1,12 (dominansi sedang-tinggi). Hasil analisis regresi hubungan kerapatan lamun dengan kelimpahan perifiton sebesar 79,13% yang menunjukkan hubungan kuat. Dengan demikian kerapatan lamun berpengaruh terhadap kelimpahan perifiton pada lamun. Periphyton abudance is influence by Seagrass densit. The aim of the research was to determaine Enhalus acoroides seagrass density and periphyton abudance correlation in Legon Boyo, Karimunjawa waters. Descriptive method and purposive sampling used in the research. The result show perphyton found as 10 kinds ang Baciliarophyceae clases are most of periphyton found. The most abundant periphyton in the transitional season is 2,146 cells/l. Periphyton species diversity in E.acoroides seagrass has a value between 0.26-1.43 (low-moderate diversity), uniformity with a value of 3.61-5.82 (high uniformity) and dominance with a value of 0.68-1.12 (moderate-high dominance). Correlation relationship with periphyton abundance was 79.13%, which showed a strong relationship. This value show of seagrass density influence periphyton abudance in seagrass.

oai:ojs.ejournal.undip.ac.id:article/60855 2024-07-04T18:54:21Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/60855 2024-07-04T18:54:21Z Buletin Oseanografi Marina Vol 13, No 2 (2024): Buletin Oseanografi Marina; 204-218 Syahrial, Syahrial; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Malikussaleh Hatta, Muhammad; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Malikussaleh Ruzanna, Arina; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Malikussaleh Jamil, Fajrul; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Malikussaleh Munira, Nanda; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Malikussaleh Laksono, Arief Budi; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Malikussaleh Al Azmy, Muhammad Ridho Al; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Malikussaleh Fauzi, Sabri; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Malikussaleh Sartika, Ayu; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Malikussaleh Handayani, Meutia; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Malikussaleh Nasution, Riski Dahrian; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Malikussaleh 2024-06-05 22:58:06 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/60855 Aceh, Fitoplankton; Invasi; Pelabuhan; Spesies Non-Indegeous id Informasi ilmiah berkaitan dengan spesies invasif di Indonesia masih sangat minim terutama mengenai mikroalga. Kajian ini dilakukan pada bulan September – November 2023 di tiga pelabuhan Provinsi Aceh dengan tujuan untuk menganalisa faktor kualitas air, mengidentifikasi jenis mikroalga dan menduga ada tidaknya mikroalga invasif. Data mikroalga dikumpulkan dengan menyaring sampel air permukaan. Parameter suhu, pH, salinitas, kecepatan arus, kecerahan dan oksigen terlarut diukur secara in situ, sedangkan fosfat, nitrat dan ammonia diukur secara ex situ; serta karakteristik kualitas perairannya dianalisis dengan PCA. Sementara untuk menduga ada atau tidak adanya mikroalga invasif dilakukan dengan membandingkan hasil penelitian mikroalga para ahli lain di sekitar lokasi penelitian. Nilai fosfat, nitrat dan ammonia sudah melebihi baku mutu (1.07 ± 1.00 mg/L, 1.63 ± 0.95 mg/L, 0.47 ± 0.74 mg/L) yang mengindikasikan adanya peningkatan produksi mikroalga, kemudian komposisi mikroalganya ditemukan sebanyak 407 ind/ml, 21 spesies dan 5 kelas. Selanjutnya karakteristik kualitas perairannya menunjukkan adanya tiga pengelompokkan hasil dari analisis PCA dengan hasil identifikasi tidak menemukan spesies mikroalga invasif.  Scientific information relating to invasive species in Indonesia is still very minimal, especially regarding microalgae. This study was carried out in September – November 2023 at three ports in Aceh Province with the aim of analyzing water quality factors, identifying types of microalgae, and suspecting the presence or absence of invasive microalgae. Microalgae data was collected by filtering surface water samples. The parameters temperature, pH, salinity, current speed, transparency, and dissolved oxygen were measured in situ, while phosphate, nitrate, and ammonia were measured ex situ, and the water quality characteristics were analyzed using PCA. Meanwhile, to suspect the presence or absence of invasive microalgae, this is done by comparing the results of microalgae research from other experts around the research location. The values of phosphate, nitrate, and ammonia have exceeded the quality standards (1.07 ± 1.00 mg/L, 1.63 ± 0.95 mg/L, and 0.47 ± 0.74 mg/L), which indicates an increase in microalgae production. The microalgae composition was found to be 407 ind/ml, 21 species, and 5 classes. Furthermore, the water quality characteristics show that there are three groupings resulting from PCA analysis, with the identification results not finding invasive microalgae species.

oai:ojs.ejournal.undip.ac.id:article/11215 2020-04-17T12:01:22Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/11215 2020-04-17T12:01:22Z Buletin Oseanografi Marina Vol 3, No 1 (2014): Buletin Oseanografi Marina; 25-31 Maslukah, Lilik; Fakultas Perikanan dan Ilmu Kelautan UNDIP Indrayanti, Elis; Fakultas Perikanan dan Ilmu Kelautan UNDIP Budiono, Stephanus; Fakultas Perikanan dan Ilmu Kelautan UNDIP 2014-01-03 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/11215 en Proses pasang dan surut di muara sungai dapat mempengaruhi fluktuasi unsur-unsur fisika kimia, seperti salinitas, temperatur, pH, oksigen terlarut, dan nutrien (nitrat, silikat dan fosfat). Fosfat merupakan salah satu nutrien yang sangat dibutuhkan untuk pertumbuhan fitoplankton. Dalam jumlah yang besar, fosfat  memberikan kontribusi untuk terjadinya eutrofikasi pada badan air. Penelitian ini bertujuan untuk mengidentifikasi respon pasang dan surut terhadap nutrien fosfat. Materi penelitian yang digunakan adalah sampel air laut yang diambil dari muara Sungai Demaan, Jepara. Penelitian dilakukan pada November 2013. Penentuan konsentrasi fosfat dalam contoh air laut ditentukan dengan menggunakan metode spektrofometrik yang didasarkan pada penambahan pereaksi asam molibdate yang mengandung asam askorbit dan potassium antimonil tatrat. Metode hubungan antara fosfat dengan salinitas menggunakan analisis korelasi. Hasil menunjukkan bahwa konsentrasi fosfat lebih tinggi pada saat pasang daripada saat surut. Fosfat dengan salinitas berkorelasi sangat kuat pada saat surut (r=0.8) dan berkorelasi lemah pada saat pasang (r=0.06).  Pada kondisi surut, sumber fosfat lebih banyak dipengaruhi oleh adanya aliran air tawar dari sungai, sedangkan pada kondisi pasang sumber fosfat  lebih dipengaruhi oleh sumber dari sedimen  dasar. Kata kunci : Muara Sungai Demaan, Fosfat, Pasang surut

oai:ojs.ejournal.undip.ac.id:article/36758 2021-09-19T19:04:11Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/36758 2021-09-19T19:04:11Z Buletin Oseanografi Marina Vol 10, No 3 (2021): Buletin Oseanografi Marina; 283-290 Pramesti, Rini; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Subagiyo, Subagiyo; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Setyati, Wilis Ari; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Buana, Titis; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2021-09-20 02:02:39 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/36758 Perubahan Iklim; Thalassia hemprichii; Simpanan Karbon; Serapan Karbon; Pantai Krakal id Padang lamun merupakan ekosistem pesisir yang mampu menyimpan dan menyerap karbon melalui proses fotosintesis yang disimpan dalam bentuk biomassa dan disimpan di akar, rhizome dan daun sehingga dapat mengurangi gas CO2 di udara. Ekosistem ini belum banyak diperhatikan fungsinya dibandingkan dengan ekosistem darat. Penelitian ini bertujuan  mengetahui  kerapatan, tutupan  lamun dan serapan karbon dalam biomassa berupa jaringan atas substrat dan bawah substrat. Penelitian dilakukan pada bulan November 2018 di Pantai Krakal - Yogyakarta. Identifikasi  jenis  lamun  dengan buku panduan  seagrasswatch,  kerapatan  dan  tutupan dengan metode line transect quadrant. Analisis kandungan karbon menggunakan metode pengabuan. Hasil penelitian menunjukkan lokasi ini memiliki biomassa di bagian atas 7,36 – 9,92 gbk/m2 dan bagian bawah 39,36 – 95,68 gbk/m2. Kedua bagian ini mampu menyimpan dan menyerap karbon rata-rata sebesar 30,42 ± 13,85 gC/m2 dan 0,2 ± 0,06 gC/d/m2. Hasil penelitian menunjukkan padang lamun di lokasi ini mampu menyimpan dan menyerap karbon meskipun dalam jumlah yang kecil. Seagrass beds are coastal ecosystems capable of absorbing and storing carbon through photosynthesis and stored of roots, rhizomes and leaves that it can reduce CO2 gas in the air. The function of this ecosystem has not been given much attention compared to the terrestrial ecosystem. The research was studied to determine density, cover of seagrass  and carbon uptake in biomass of the upper and lower substrate. The research was carried in November 2018 at Krakal Beach - Yogyakarta. Identification of the type seagrass was carried by seagrasswatch manual, the density and cover was carried by the line transect quadrant method. The carbon content was analysis by the ashing method. The results was showed that this location has a biomass at the top of 7.36 - 9.92 gbk/m2 and the bottom of 39.36 - 95.68 gbk/m2. Both of these parts are able to store and absorb carbon are average of 30.42 ± 13.85 gC/m2 and 0.2 ± 0.06 gC/d/m2. The results showed that the seagrass beds on this beach were able to store and absorb of carbon with small amounts.

oai:ojs.ejournal.undip.ac.id:article/42550 2026-02-11T04:53:31Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/42550 2026-02-11T04:53:31Z Buletin Oseanografi Marina Vol 14, No 1 (2025): Buletin Oseanografi Marina; 81-89 Azizi, Muhammad Faris; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Endrawati, Hadi; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Sabdono, Agus; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2025-02-20 05:07:27 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/42550 Ekosistem; Polimer; Skrining; Enzim; Jepara id Jutaan ton sampah plastik global akan berakhir ke laut setiap tahunnya. Dampak adanya mikroplastik telah menjadi ancaman bagi organisme laut, salah satunya karang keras yang merupakan penyusun ekosistem terumbu karang. Penelitian ini bertujuan memperoleh bakteri asosiasi karang keras yang berpotensi mendegradasi mikroplastik dari dari perairan Pantai Kartini, Jepara. Sampel karang diambil dari tiga macam life form yaitu branching, massive, dan submassive  pada kedalaman 5 – 10 meter. Sampel karang selanjutnya dilakukan pengenceran bertingkat, kemudian diinokulasi pada media agar laut zobell 2216E. Skrining uji potensi degradasi mikroplastik dilakukan menggunakan substrat tributyrin sebagai tahap awal untuk mengetahui aktivitas enzim lipolitik, dilanjutkan dengan uji polycaprolactone untuk mengetahui potensi adanya enzim poliesterase yang dapat memecah partikel mikroplstik. Tahapan analisa molekuler dilakukan meliputi ekstraksi DNA, amplifikasi DNA gen 16S rRNA, elektroforesis, dan analisa filogenetik. Hasil penelitian didapatkan sebanyak 37 isolat bakteri asosiasi karang keras dari berbagai life form. Delapan bakteri diketahui berpotensi memiliki aktivitas enzim lipolitik pada media tributyrin. Dilanjutkan pada uji polycaprolactone dihasilkan satu isolat bakteri dari karang massive degan kode PK-KM-1.1 yang berpotensi mendegradasi polimer polycaprolactone. Analisa molekuler menunjukkan isolat PK-KM-1.1 memiliki kemiripan dengan Bacillus aerius hingga 99,71%. Hasil penelitian ini menunjukkan bahwa bakteri yang berasosiasi dengan karang keras berpotensi mendegradasi senyawa mikroplastik polycaprolactone dan dapat dijadikan sebagai sumber inang di dalam eksplorasi bakteri pendegradasi mikroplastik.

oai:ojs.ejournal.undip.ac.id:article/15743 2020-04-17T12:03:53Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/15743 2020-04-17T12:03:53Z Buletin Oseanografi Marina Vol 6, No 1 (2017): Buletin Oseanografi Marina; 53-60 Suwartimah, Ken; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Wati, Dwi Saniscara; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Endrawati, Hadi; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Hartati, Retno; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2017-08-28 16:35:24 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/15743 Echinodermata; Ophiocoma scolopendrin; Archaster typirus; Krakal; Gunung Kidul id Echinodermata merupakan salah satu komponen penting dalam hal keanekaragaman fauna di daerah terumbu karang. Hal ini karena terumbu karang berperan sebagai tempat berlindung dan mencari makan bagi fauna Echinodermata. Salah satu penyebaran biota ini adalah di perairan rataan terumbu karang Pantai Selatan di Pantai Krakal, Gunung Kidul, Yogyakarta. Tujuan penelitian ini adalah untuk mengetahui species dan kelimpahan Echinodermata di Pantai Krakal, Kabupaten Gunung Kidul, Yogyakarta. Pengambilan sampel pada penelitian ini menggunakan metode transek kuadrat dengan ukuran 1m2. Hasil pengamatan ditemukan beberapa species dari 3 kelas dari filum Echinodermata, antara lain 3 species dari kelas Echinoidea, 3 species dari kelas Ophiuroidea, dan 1 species dari kelas Asteroidea. Hasil penelitian menunjukkan kelimpahan individu tertinggi penelitian adalah Ophiocoma scolopendrina (4.01 ind. /m2) dan terendah adalah Archaster typirus ( 1 ind. /m2). Echinodermata is a important ecosystem component in terms of the diversity of fauna in the coral reefs. This is because the coral reefs act as a refuge and feeding ground for the fauna of the Echinoderms. One of echinoderm habitat is reef flat waters of Krakal Beach, Gunung Kidul, Jogjakarta. The purpose of this research is identify and determine the abundance of Echinoderms. Purpossive sampling method was applied. The samples were taken using 1m2 transect squares. There were 3 classes of Echinodermata found, i.e. 3 species of Echinoidea, 3 species of Ophiuroidea, and 1 species of Asteroidea. The result showed that the highest was Ophiocoma scolopendrina (4,01 ind./m2 and the lowest was Archaster typirus (1 ind./m2)

oai:ojs.ejournal.undip.ac.id:article/40786 2023-01-25T06:05:53Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/40786 2023-01-25T06:05:53Z Buletin Oseanografi Marina Vol 11, No 3 (2022): Buletin Oseanografi Marina; 271-281 Bayudana, Bintang Chandra; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran Riyantini, Indah; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran Sunarto, Sunarto; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran Zallesa, Sheila; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran 2022-10-01 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/40786 Asosiasi; Korelasi; Makrozoobentos; Mangrove; Pulau Pari id Salah satu status kawasan Pulau Pari yaitu menjadi kawasan konservasi mangrove. Makrozoobentos menjadikan ekosistem mangrove sebagai habitat untuk mencari makan, berlindung, dan berkembang biak. Tujuan riset ini adalah untuk mengidentifikasi jenis mangrove serta kerapatannya, menghitung kelimpahan, keanekaragaman, keseragaman makrozoobentos, dan menentukan pola asosiasi dan korelasi makrozoobentos terhadap kondisi ekosistem mangrove di Pulau Pari. Riset ini dilaksanakan pada Maret 2021 di Pulau Pari, Kepulauan Seribu. Lokasi penelitian dibagi menjadi 3 stasiun, yaitu Utara, Barat, dan Timur. Metode yang digunakan adalah metode transek kuadrat, yaitu dengan membentangkan tali tegak lurus garis pantai menuju daratan sepanjang 50 meter dengan ukuran 10 m x 10 m untuk mangrove, dan 1 m x 1 m untuk makrozoobentos. Hasil penelitian ditemukan 3 jenis mangrove yaitu Rhizophora mucronata, Rhizophora apiculata, dan Bruguiera cylindrica. Kerapatan mangrove tertinggi seluas 1234 ind/ha. Nilai kelimpahan makrozoobentos berkisar antara 18.34 - 45.89 ind/m2. Indeks keanekaragaman makrozoobentos termasuk dalam kategori sedang yaitu 2.65-2.95 dan keseragaman termasuk kategori tinggi sebesar 0,885-0,897. Dari semua perhitungan asosiasi dan korelasi antara makrozoobentos dengan ekosistem mangrove menunjukkan adanya hubungan sangat kuat dimana tumbuhan mangrove dapat memberikan pengaruh terhadap keberlangsungan hidup makrozoobentos. One of the statuses of the Pari Island area is to become a mangrove conservation area. Macrozoobentos make the mangrove ecosystem a habitat for foraging, sheltering, and breeding. The purpose of this research was to identify mangrove species and their density, to calculate the abundance, diversity, uniformity of macrozoobentos, and to determine the pattern of association and correlation of macrozoobentos to the condition of the mangrove ecosystem in Pari Island. This research was carried out in March 2021 on Pari Island, Thousand Islands. The research location is divided into 3 stations, namely North, West, and East. The method used is the quadratic transect method, namely by stretching a rope perpendicular to the coastline to the mainland along 50 meters with a size of 10 m x 10 m for mangroves, and 1 m x 1 m for macrozoobentos. The results of the study found 3 types of mangroves, namely Rhizophora mucronata, Rhizophora apiculata, and Bruguiera cylindrica. The highest mangrove density is 1234 ind/ha. The abundance value of macrozoobentos ranged from 18.34 - 45.89 ind/m2. Macrozoobentos diversity index was included in the medium category, namely 2.65-2.95 and uniformity was included in the high category of 0.885-0.897. From all calculations of associations and correlations between macrozoobentos and mangrove ecosystems, it shows that there is a very strong relationship where mangrove plants can have an influence on the survival of macrozoobentos.

oai:ojs.ejournal.undip.ac.id:article/6912 2014-05-20T02:58:19Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6912 2014-05-20T02:58:19Z Buletin Oseanografi Marina Vol 1, No 5 (2012): Buletin Oseanografi Marina; 20-25 Rochaddi, Baskoro; Marine Science Department, Diponegoro University 2012-10-10 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6912 en A study was conducted to assess the Arsenic (As) metal contamination of the shallow aquifers in  Jakarta, Semarang, and Surabaya city of Java and its relation to the highly developed industrial and domestic activities in the coastal region. Arsen  was assayed in the waters of  30 wells throughout the terrestrial cities, in residential zones using Atomic Absorption Spectrophotometer (AAS) technique. Analysis of the As level revealed that high As contents were found primarily in Jakarta, to a maximum of 59.65 μg L−1. The mean and standard deviation of As in Jakarta, Semarang and Surabaya were 15.47 ± 18.79, 1.25 ± 2.05 and 0.59 ± 0.26 μgL-1, respectively. The groundwater As concentration  shows a correlation with Fe significantly. It was concluded that the levels of As in some investigated 3 Indonesian metropolis cities were below the maximum allowable concentrations of metals recommended by Indonesian Drinking & Domestic Water Quality Standard for Ground Water and WHO’s (World Health Organization)Guideline Values for Drinking Water, except for station 5 and 6 of Jakarta.   Keywords: Arsenic (As), AAS, coastal aquifer

oai:ojs.ejournal.undip.ac.id:article/72062 2025-10-18T08:20:06Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/72062 2025-10-18T08:20:06Z Buletin Oseanografi Marina Vol 14, No 3 (2025): Buletin Oseanografi Marina; 481-489 Zainalarifin, Jauhar; Study Program of Coastal and Marine Resources Management, Graduate School, IPB University Department of Aquatic Resources Management, Faculty of Fisheries and Marine Science, IPB University Effendi, Hefni; Study Program of Coastal and Marine Resources Management, Graduate School, IPB University Department of Aquatic Resources Management, Faculty of Fisheries and Marine Science, IPB University Center of Environmental Research, IPB University Mashar, Ali; Study Program of Coastal and Marine Resources Management, Graduate School, IPB University Department of Aquatic Resources Management, Faculty of Fisheries and Marine Science, IPB University Aprilia, Mita; Department of Aquatic Resources Management, Faculty of Fisheries and Marine Science, IPB University 2025-10-18 15:20:05 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/72062 Thropic level; Eretan Coastal; Water Quality en The coastal waters of Eretan located in the north of Indramayu Regency are used as fishing grounds by local fishermen. The condition of water input, especially from the surrounding river waters, namely the Cimanuk River, Cipunagara River, and Perawan River, is thought to affect the condition of coastal waters. This study aims to analyze the trophic level based on water quality conditions. Data collection on the quality of the aquatic environment was carried out in three locations with purposive sampling considerations, namely the Cipunagara estuary, the Perawan estuary, and the Cimanuk estuary. Sampling was carried out in two different seasons, namely the dry season and the rainy season. The method used in the analysis is the TRIX Index based on nutrients, phosphate, chlorophyll-α, and DO saturation. Meanwhile, water quality parameters at each location were analyzed using principal component analysis (PCA). The results of the study showed that the main water quality parameters tended to differ in each season. The trophic level at the three locations had values between 4.99 and 8.59, so they had mesotrophic to hypertrophic status. This shows that coastal water conditions need to be managed so that water conditions are more stable.

oai:ojs.ejournal.undip.ac.id:article/21378 2020-04-25T06:17:15Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/21378 2020-04-25T06:17:15Z Buletin Oseanografi Marina Vol 8, No 1 (2019): Buletin Oseanografi Marina; 9-16 Putra, Bagus Apriana; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Santoso, Adi; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Riniatsih, Ita; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2019-04-19 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/21378 Enhalus acoroides; Seng; Teluk Awur; Pulau Panjang; id Lamun adalah tanaman air yang berbunga (Antophyta) dan mempunyai kemampuan adaptasi untuk hidup dan tumbuh di lingkungan laut.Enhalus acoroidesmerupakan jenis lamun yang banyak tumbuh di sekitar perairan Teluk Awur dan Pulau Panjang. Kegiatan manusia meliputi pertanian, industri mebel, pariwisata, dan kegiatan nelayan  di Teluk Awur dan Pulau Panjang diduga menjadi sumber logam berat Seng (Zn). Keberadaan lamun di laut dapat menjadi bioindikator pencemaran logam berat karena menyerap dan mengakumulasi bahan pencemar. Tujuan penelitian ini adalah mengetahui dan membandingkan kandungan logam berat seng (Zn)pada lamun Enhalus acoroides (akar dan daun), pada air dan pada sedimen di Teluk Awur dan Pulau Panjang. Penelitian ini menggunakan metode deskriptif, sedangkan metode penentuan lokasi menggunakan metode purposive sampling. Materi yang digunakan dalam penelitian ini adalah sampel lamun Enhalus acoroides, air, dan sedimen.Parameter lingkungan seperti suhu, salinitas, oksigen terlarut, kecerahan, pH dan arus diukur secara in situ. Hasil penelitian menunjukkan nilai akumulasi Zn pada akar Enhalus acoroides  di Teluk Awur berkisar antara 0,98–1,27 mg/l dan pada daun 0,4–0,89 mg/l, sedangkan akumulasi logam berat Zn pada akar Enhalus acoroides di Pulau Panjangberkisar antara 0,78–1,01 mg/l dan pada daun 0,34–0,75 mg/l. Kemampuan lamun Enhalus acoroides yang ada di Teluk Awur dan Pulau Panjang dalam mengakumulasi logam berat Zn termasuk dalam kategori rendah dengan nilai faktor biokonsentrasi rata-rata <250.  Seagrass is a flowering water plant (Antophyta) and can adapt to live and grow in the marine environment. Enhalus acoroides is a type of seagrass that grows around Teluk Awur and Panjang Island. All human activities including agriculture, tourism, and fishing activities in Teluk Awur and Panjang Island may be the source of heavy metals Zinc (Zn). The presence of seagrass in the sea can be a bioindicator of heavy metal pollution due to absorb and accumulate contaminants. The purposes of this research were to know and compare the content of heavy metals (Zn in seagrass Enhalus acoroides (root and leaf), on water and in sediments in Teluk Awur and Panjang Island.  This research used the descriptive method, while the method of determining the location used purposive sampling method. The material used in this research were the samples of Enhalus acoroides, water, and sediment. Environmental parameters such as temperature, salinity, dissolved oxygen, clarity, pH and current flow were determined in situ. The results showed the value of the accumulation of heavy metal Zn from the root of Enhalus acoroides in Teluk Awur ranging between 0.98–1.27 mg/l and 0.41–0.89 mg/l from the leaves, while the accumulation of heavy metal Zinc (Zn) from the root of Enhalus acoroides in Panjang Island range between 0,78–1.01 mg/l and 0.34–0.75 mg/l from the leaves. The ability of Enhalus acoroides in Teluk Awur and Panjang Island to accumulate the heavy metals Zn were low category because of bioconcentrating factor value <250. 

oai:ojs.ejournal.undip.ac.id:article/49631 2023-06-20T04:50:15Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/49631 2023-06-20T04:50:15Z Buletin Oseanografi Marina Vol 12, No 2 (2023): Buletin Oseanografi Marina; 243-252 MS, Yuniarti; Departemen Kelautan Fakultas Perikanan dan Ilmu Kelautan Universitas Padjadjaran Andriani, Yuli; Departemen Perikanan Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran Prasetiawan, Nanda Radhitia; Badan Riset dan Inovasi Nasional Faizal, Ibnu; Departemen Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran Chotimah, Liana Chusnul; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjadjaran 2023-06-20 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/49631 Karakteristik; Kepadatan; Komposisi; Sampah Laut id Penelitian ini dilaksanakan di Kabupaten Pangandaran yaitu di Batukaras, pada bulan Maret – April 2022. Penelitian bertujuan untuk mengetahui komposisi sampah laut apa saja yang dapat terperangkap pada akar mangrove Avicennia, komposisi sampah laut apa saja yang masih dapat berpindah setelah masuk ke ekosistem Mangrove dan kemampuan akar mangrove Avicennia dalam memerangkap sampah laut. Metode yang digunakan yaitu metode Transek garis atau Line Transect. Hasil yang diperoleh dari riset ini yaitu sampah laut yang ditemukan terdiri dari 11 jenis sampah dengan 3 kategori, yaitu kategori plastik dan karet, kaca, serta pakaian dan turunannya. Jumlah total sampah yang ditemukan sebanyak 203 potongan sampah dengan berat 1986 g. Kepadatan sampah yang ditemukan yaitu 8,24 potongan/m2, dominan sampah laut yang ditemukan yaitu kategori plastik dan karet. Komposisi sampah laut yang terperangkap dan berpindah secara keseluruhan berjumlah 203 potongan sampah, sebanyak 31,03% merupakan  sampah laut yang terperangkap pada akar mangrove Avicennia dan sisanya 68,97% merupakan sampah yang dapat berpindah. Karakteristik sampah yang terperangkap pada akar mangrove Avicennia didominasi oleh kategori plastik dan karet dengan ukuran yang panjang. Hubungan keterperangkapan sampah laut pada akar mangrove Avicennia setelah dilakukan analisis korelasi, hasil yang diperoleh yaitu r = 0,6892, maka hubungan tersebut termasuk kedalam kategori kuat. Jadi semakin padat akar mangrove maka kepadatan sampah yang diperoleh akan meningkat, kemampuan akar dalam memerangkap sampah pun akan semakin baik.   This research was conducted in Pangandaran Regency, namely in Batukaras, from March to April 2022. The research aims to determine the composition of marine debris that can be trapped in the roots of the Avicennia mangroves, the composition of marine debris that can still move after entering the mangrove ecosystem, and the ability of Avicennia mangrove roots in trapping marine debris. The method used is the Line Transect method. The results obtained from this research were that the marine debris found consisted of 11 types of waste with 3 categories, namely plastic and rubber, glass, and clothing, and their derivatives. The total amount of waste found was 203 pieces of waste weighing 1986 g. The density of the waste found was 8,24 pieces/m2, and the dominant marine debris found was the category of plastic and rubber. The total composition of trapped and displaced marine debris is 203 pieces of waste, 31,03% of which is marine debris trapped in the roots of the Avicennia mangroves and the remaining 68,97% is a movable waste. Trash characteristics trapped in Avicennia mangrove roots are dominated by plastic and rubber categories with long sizes. The correlation between marine debris entrapment in Avicennia mangrove roots after correlation analysis was carried out, the results obtained were r = 0,6892, so the relationship was included in the strong category. So the denser the mangrove roots, the density of the waste obtained will increase, and the ability of the roots to trap garbage will be even better.

oai:ojs.ejournal.undip.ac.id:article/6948 2014-05-22T08:02:54Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6948 2014-05-22T08:02:54Z Buletin Oseanografi Marina Vol 2, No 3 (2013): Buletin Oseanografi Marina; 29-37 Twindiko, Analis Finansi; Jurusan Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Wijayanti, Diah Permata; Jurusan Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Ambariyanto, Ambariyanto; Jurusan Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2013-07-22 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6948 en Indo-Pasifik merupakan kawasan perairan yang memiliki keanekaragaman yang tinggi. Salah satu keanekaragaman tertinggi di perairan Indo-pasifik adalah spesies ikan karang. Pseudocrhomis adalah salah satu spesies ikan karang yang tersebar luas di seluruh perairan Indo-Pasifik. Di dalam suatu kawasanyang memiliki keanekaragaman jenis melimpah, terdapat banyak spesiesyang bersaing untuksumber daya yang terbatas dalam bertahan hidup. Perbedaan kondisi lingkungan dapat mengakibatkan terjadinya perubahan karakter morfologi, anatomi dan filogenetik dari suatu populasi. Penelitian ini bertujuan untuk mengetahui hubungan kekerabatan Genus ikan Pseudochromis di sebagian perairan Indo-Pasifik dengan melihat perbedaan kedalaman dan perbedaan warna. Penelitian ini menggunakan metode penelitian eksploratif. Sedangkan untuk analisis molekuler melalui ekstraksi DNA dilanjutkan dengan Polymerase Chain Reaction (PCR), elektroforesis, sekuensing dan yang analisis filogenetik. Hasil dari penelitian menunjukkan bahwa pohon tersebut terbagi dalam lima clade dengan jarak genetik terdekat 0% dan jarak genetik terjauh 16,4%. Perbedaan kedalaman dan warna pada ikan tersebut tidak terlalu signifikan sebagai petunjuk dalam menentukan spesies baru.   Kata Kunci : Pseudochromis, Polymerase Chain Reaction (PCR), Pohon Filogenetik, Lokus 16S, Lokus Control Region

oai:ojs.ejournal.undip.ac.id:article/23659 2020-09-27T10:49:01Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/23659 2020-09-27T10:49:01Z Buletin Oseanografi Marina Vol 9, No 1 (2020): Buletin Oseanografi Marina; 69-76 Firdaus, Annisa Rahma; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Taufiq-Spj, Nur; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Redjeki, Sri; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2020-04-30 08:00:14 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/23659 Scylla serrata; Rasio Kelimpahan; Lebar Karapas; Mangkang Wetan; Semarang en Scylla serrata yang dikenal sebagai kepiting bakau merupakan sumber daya hayati ekosistem bakau yang hingga saat ini memiliki demand pasar yang cukup tinggi. Kondisi ini meningkatkan eksploitasi penangkapan species ini sehingga menyebabkan terganggunya populasi kepiting di alam. Penelitian ini bertujuan untuk mengetahui komposisi hasil tangkapan kepiting bakau (Scylla serrata) dengan melihat rasio kelimpahan dan hubungan lebar - berat kepiting bakau jantan dan betina dari hasil tangkapan di perairan Mangkang Wetan – Tugu, Kota Semarang, Jawa Tengah. Penelitian ini dilakukan pada musim penghujan di akhir tahun 2018 (Desember) dan awal tahun 2019 (Januari). Purposive sampling merupakan metode yang digunakan dalam penelitian ini dengan melakukan survey yang terarah dan terencana. Sampel kepiting bakau didapatkan dari hasil tangkapan nelayan yang diarahkan pada lima titik berdasarkan aktivitas yang berbeda. Hasil menunjukkan bahwa tangkapan kepiting bakau (Scylla serrata) pada Bulan Desember 2018 dan Januari 2019 di dominasi oleh kepiting jantan. Tangkapan bulan Desember 2018 memiliki rasio jantan : betina lebih besar (1,65:1) dari Januari 2019 (1,21:1). Korelasi lebar karapas dan berat kepiting bakau jantan dan betina bersifat allometrik, dimana jantan memiliki pola pertumbuhan allometrik positif sedangkan betina memiliki pola perumbuhan allometrik negatif. Dari data tersebut dapat disimpulkan bahwa populasi kepiting jantan lebih banyak ditemukan selama musim penghujan terutama di bulan Desember dan Januari. Ketidak seimbangan sex rasio ini akan menyebabkan terganggunya kestabilan populasi Scylla setrata di ekosistem estuaria Mangkang Wetan Semarang.  Scylla serrata known as mangrove crab as an edible food resources of the mangrove ecosystem which has a very high market demand. Due to this conditions will be affected in increasing exploitation of this species and cause inbalancing the population in the nature. The study aims to calculate abundance ratio and width – weight correlation between male and female of the crab caught from the estuary of Mangkang Wetan Semarang, Central Java. This study conducted at the end of 2018 (December) to the first month of 2019 (Januari). Survey method was used in this study by using purposive sampling in order to get the right data aimed as a planned. The crab sample was caught by some fisherman which were dirrected at five sampling points base on different fisherman activities. The results shows that the caught seasons in the rainy time  of Dec 2018 and Jan 2019, dominated by males crab (Scylla serrata). The December caught have higher sex ratio between male and female (1,65:1) compare to Januari caught (1,21:1). Correlation in carapage width and body weigth between the crabs male and female shows allometrik growth. Where, the male growth tend to have a positive allometric, while the female were negative. These can be conclude that, the male crabs were dominantly found during rainy seasons especially in December dan January. This imbalance of the sex ratio will disturb the population stability of Scylla setrata in estuary ecosystem of Mangkang Wetan Semarang.

oai:ojs.ejournal.undip.ac.id:article/53109 2024-07-04T18:54:21Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/53109 2024-07-04T18:54:21Z Buletin Oseanografi Marina Vol 13, No 2 (2024): Buletin Oseanografi Marina; 141-152 Yamindago, Ade; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Brawijaya Yona, Defri; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Brawijaya Farhaninur, Amalia Izzy; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Brawijaya 2024-06-05 22:58:04 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/53109 polusi air; volatile organic compound; senyawa pencemar air; bahan kimia industri; pestisida id Senyawa organik volatil atau volatile organic compounds (VOC) adalah kelompok senyawa yang sering ditemukan di lingkungan perairan yang memiliki dampak negatif pada ekosistem dan kesehatan manusia. Keberadaan VOC di perairan dapat disebabkan oleh produksi dan penggunaan senyawa ini secara berkepanjangan. Sungai Sedati terletak di daerah perkotaan telah menerima masukan senyawa ini dari kegiatan rumah tangga, bahan baku industri, pertanian dan budidaya perikanan. Pendeteksian VOC di badan dan muara Sungai Sedati dilakukan menggunakan Solid Phase Microextraction (SPME) dan Gas Cromatography-Mass Spectrometry (GCMS). Selain itu, penelitian ini juga mengevaluasi kualitas perairan berupa pH, DO, salinitas, suhu, dan arus. Total 39 senyawa diperoleh dari Perairan Sedati, dimana senyawa-senyawa tersebut digunakan sebagai bahan kimia industri, bahan kimia farmasi, produk pembersih, produk perawatan pribadi, plasticizer, dan pestisida. Penggunaan tertinggi sebanyak 17 senyawa digunakan sebagai bahan kimia industri dan tujuh senyawa sebagai pestisida. Cemaran VOC didominasi oleh fenol (2,4-di-tert-butilfenol; 3,5-di-tert-butilfenol). Analisis kualitas air menunjukkan bahwa kualitas Perairan Sedati masih dalam ambang batas baku mutu air sungai kelas III dan baku mutu air laut. Penelitian ini memberikan informasi mengenai potensi dampak VOC, dan pentingnya pengelolaan limbah perkotaan yang lebih berkualitas untuk ekosistem perairan dan kesehatan manusia.  Volatile organic compounds (VOCs) are a group of chemicals that are frequently detected in aquatic environments, and show negative impacts on ecosystem and human health. The existence of VOCs in the waters may be obtained from their massive production and application. The Sedati River is located in an urban area that has received impacts from household activities, industrial raw materials, agriculture, and aquaculture. The detection of VOCs in the body and the river mouth of Sedati River was determined by Solid Phase Microextraction (SPME) and Gas Chromatography-Mass Spectrometry (GCMS). Water quality of the Sedati River was evaluated, namely pH, DO, salinity, temperature, and water current. A total of 39 compounds were detected in the Sedati River. Most of them were used in industrial chemicals, pharmaceutical chemicals, cleaning products, personal care products, plasticizers, and pesticides. 17 compounds were highly used as industrial chemicals, whereas seven compounds were lowly used as pesticides. The phenol (2,4-Di-tert-butylphenol; 3,5-Di-tert-butylphenol) was a dominant compound in the Sedati River. The water quality was in agreement with the water quality standards. This study provides information about the impacts of VOC in the water and the importance of water quality treatments for healthy ecosystems and humans.    

oai:ojs.ejournal.undip.ac.id:article/11217 2016-06-07T23:59:17Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/11217 2016-06-07T23:59:17Z Buletin Oseanografi Marina Vol 1, No 2 (2012): Buletin Oseanografi Marina; 7-12 Helmi, Muhammad; Fakultas Perikanan dan Ilmu Kelautan UNDIP Wibowo, Muhammad Arief; Fakultas Perikanan dan Ilmu Kelautan UNDIP 2012-01-03 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/11217 en This study aims to determine the spectral response of ALOS AVNIR-2 satellite’s image on the turbidity of the waters and devise the algorithms for turbidity mapping in the coastal waters of Semarang City, Indonesia. The Remote Sensing Technology Center of Japan, RESTEC supported the ALOS AVNIR data and conducted the technical training on Application and Verification Project to support this research. The method used in this study is digital image processing and field survey. Digital image processing method including histogram adjustment for radiometry correction, rectification for geometry correction, cropping area of interest, masking the area for the separation of the mainland, statistical analysis to determine the spectral response of the image of water turbidity (R2 ≥ 0.9) and algorithm model evaluation by using the Mean Normalized Bias (MNB) as an indicator of systematic error and the Root Mean Square (RMS) as an indicator of random error (Ouillon et al., 2008). The results of statistical analysis showed that the red channel and green channel on ALOS AVNIR-2 has a relatively high spectral response of the turbidity level (R2 ≥ 0.9). The best algorithm model for the single spectral channel obtained from the red band with the MNB value is 22.65% and the RMS value is 32.09%. The best algorithm model for the dual channel spectral bands obtained from a combination of red and blue bands with the MNB value is 19.89% and the RMS value is 28.22%. Distribution of water turbidity levels in the waters of Semarang city has a range between 0.03 to 9.44 NTU. Key words: ALOS AVNIR-2, Turbidity Mapping and Coastal Area

oai:ojs.ejournal.undip.ac.id:article/31736 2021-06-08T16:31:18Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/31736 2021-06-08T16:31:18Z Buletin Oseanografi Marina Vol 10, No 2 (2021): Buletin Oseanografi Marina; 200-212 Firmansyah, Muh Dandi; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Ismanto, Aris; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Wulandari, Sri Yulina; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Widiaratih, Rikha; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Rifai, Azis; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Atmodjo, Warsito; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2021-05-22 17:24:31 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/31736 Oil Spill Spreading; Trajectory; Karawang Waters id Perairan Karawang merupakan salah satu perairan yang dilintasi Alur Laut Kepulauan Indonesia (ALKI) dimana kapal-kapal besar dan kapal tanker melintasi area perairan ini. Pada bagian utara Perairan Karawang juga terdapat kegiatan pengeboran migas (minyak dan gas) sumur bor milik salah satu perusahaan minyak dan gas nasional, sehingga Perairan Karawang dan sekitarnya mempunyai resiko yang tinggi terhadap tumpahan minyak. Tujuan penelitian ini adalah untuk memperkirakan luasan pola persebaran tumpahan minyak mentah (crude oil) akibat kebocoran sumur bor di perairan Karawang dan wilayah perairan di sekitarnya. Penelitian ini dibagi menjadi dua tahapan, yaitu tahap survei lapangan dan tahap pemodelan numerik. Pemodelan numerik terdiri dari pemodelan arus, sebaran tumpahan minyak, dan nasib  (fate) minyak setelah tumpah yang masing-masing dimodelkan menggunakan model matematika dua dimensi Penelitian ini menggunakan metode kuantitatif dan untuk menentukan lokasi pengukuran menggunakan metode purposive sampling. Trayektori Sebaran tumpahan minyak mentah (crude oil) dominan bergerak dari sumur bor pada koordinat 107°37′32.52″E dan 06°5’39”S menuju ke arah barat, bergerak dari Perairan Karawang menuju Perairan Bekasi. Hal itu terjadi karena peristiwa minyak tumpah terjadi musim timur, yakni arus dominan bergerak dari arah timur dan tenggara menuju ke arah barat dan barat laut. Daerah terdampak tumpahan minyak ini meliputi Kabupaten Karawang dan Kabupaten Bekasi, khususnya wilayah Perairan Kecamatan Muara Gembong dengan luasan sebaran tumpahan minyak sekitar 249.91 km2.   Karawang waters is one of the waters crossed by the Indonesian Archipelago Sea Channel (ALKI) where large ships and tankers cross this water area. In the northern part of Karawang Waters, there is also oil and gas (oil and gas) drilling activities which are owned by one of the national oil and gas companies, so that the Karawang waters and surrounding areas have a high risk of oil spills. The purpose of this study was to estimate the extent of the distribution pattern of crude oil spills due to leakage of wells in the waters of Karawang and the surrounding waters. This research was divided into two stages, namely the field survey stage and the numerical modeling stage. Numerical modeling consists of modeling the flow, distribution of oil spills, and the fate of oil after spilling, each of which is modeled using 2 dimension mathematical model. This study uses quantitative methods and to determine the location of measurements using the purposive sampling method. Trajectory The dominant distribution of crude oil spills moves from the wellbore at coordinates 107 ° 37′32.52 ″ E and 06 ° 5'39 "S heading westward, moving from Karawang Waters to Bekasi Waters. This happened because the oil spill event occurred in the east season, which is the dominant current moving from east and southeast to west and northwest. Areas affected by the oil spill include Karawang Regency and Bekasi Regency, especially the waters of the Muara Gembong District with an area of distribution of oil spills around 249.91 km2.

oai:ojs.ejournal.undip.ac.id:article/63123 2026-02-11T04:53:31Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/63123 2026-02-11T04:53:31Z Buletin Oseanografi Marina Vol 14, No 1 (2025): Buletin Oseanografi Marina; 101-111 Ekamaida, Ekamaida; Program Studi Ilmu Pengelolaan Sumberdaya Alam dan Lingkungan, Institut Pertanian Bogor Hariyadi, Sigid; Departemen Manajemen Sumberdaya Perairan, Fakultas Perikanan dan Ilmu Kelautan, Institut Pertanian Bogor Nurilmala, Mala; Departemen Teknologi Hasil Perairan, Fakultas Perikanan dan Ilmu Kelautan, Institut Pertanian Bogor Kusmana, Cecep; Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor Krisanti, Majariana; Departemen Manajemen Sumberdaya Perairan, Fakultas Perikanan dan Ilmu Kelautan, Institut Pertanian Bogor Syahrial, Syahrial; Program Studi Ilmu Kelautan, Fakultas Pertanian, Universitas Malikussaleh 2025-02-20 05:07:28 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/63123 Logam Berat; PCA; Kerang; Bivalvia; Moluska id Kajian dilakukan bulan Oktober 2023 pada 5 stasiun pengamatan yang bertujuan untuk menilai kondisi ekologi perairan Selat Cunda dalam upaya pengembangan budidaya tiram. Parameter diukur secara in situ dan ex situ, selanjutnya dibandingkan dengan baku mutu lingkungan serta dianalisis menggunakan Principal Component Analysis. Oksigen terlarut tertinggi ditemukan pada Stasiun 3 (7.66 ± 0.08 mg/L), pH pada Stasiun 2 (7.95 ± 0.02), salinitas pada Stasiun 1 (27.00 ± 1.00‰), kecerahan pada Stasiun 5 (79.00 ± 4.00 cm), kedalaman dan suhu pada Stasiun 2 (62.33 ± 8.33 cm dan 30.80 ± 0.62⁰C), kekeruhan dan kelimpahan Escherichia coli pada Stasiun 1 (2262.42 ± 1613.32 NTU dan 1020.00 ± 113.00 MPN/100 ml), logam berat Cd air pada Stasiun 3 dan 4 (masing-masing 0.01 ± 0.00 mg/L), logam berat Pb air pada Stasiun 3 (0.07 ± 0.01 mg/L), kecepatan arus pada Stasiun 2 (0.20 ± 0.01 m/s), tekstur pasir pada Stasiun 5 (88.00 ± 1.73%), tekstur debu pada Stasiun 4 (46.00 ± 22.52%), tekstur liat dan C-organik pada Stasiun 1 (9.67 ± 1.15% dan 0.85 ± 0.68%), logam berat Cd serta Pb pada Stasiun 3 (0.03 ± 0.01 mg/L dan 7.60 ± 0.58 mg/L) dan N-total pada Stasiun 4 (0.12 ± 0.33%). Hasil analisis PCA memperlihatkan bahwa parameter suhu, tekstur debu, kecepatan arus, Cd air, N-total dan tekstur pasir merupakan pembeda utama variasi di PC pertama; sementara parameter salinitas, kelimpahan E. coli, kekeruhan, tekstur liat dan kedalaman merupakan pembeda utama variasi di PC kedua. Untuk mewujudkan kesuksesan budidaya tiram di Selat Cunda Kota Lhokseumawe harus ditingkatkan nilai kecerahan dan kedalaman perairan serta menurunkan kekeruhan serta logam berat Pb.

oai:ojs.ejournal.undip.ac.id:article/15732 2020-04-17T12:03:03Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/15732 2020-04-17T12:03:03Z Buletin Oseanografi Marina Vol 5, No 2 (2016): Buletin Oseanografi Marina; 127-134 Hartati, Retno; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan,Universitas Diponegoro Kampus Tembalang, Semarang 50275 Telp/Fax. 024-7474698 2016-10-09 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/15732 en Hutan mangrove merupakan ekosistem yang unik karena terjadi akibat perpaduan antara habitat darat dan laut. Ekosistem mangrove juga merupakan tempat hidup berbagai jenis hewan benthos termasuk krustasea yang memegang peranan penting dalam ekosistem tersebut. Adanya perubahan fungsi lahan untuk berbagai kepentingan manusia diduga akan berpengaruh terhadap kondisi kelimpahan krustaseayang terdapat di kawasan tersebut. Penelitian ini bertujuan untuk menganalisais komposisi dan struktur komunitas makrozoobenthos krustasea di kawasan mangrove Tugurejo, Semarang. Pengambilan sampel dilakukan dengan 2 metode yaitu kualitatif dan kuantitatif. Hasil penelitian menunjukkan terdapat 22 jenis makrozoobenthos krustasea, dari Infra Ordo Brachyura ditemukan 14 jenis yang termasuk ke dalam 5 famili, Infra Ordo Macrura ditemukan 4 jenis yang termasuk ke dalam 4 famili, dari Isopoda ditemukan 3 jenis dan dari Copepoda ditemukan satu jenis biota. Nilai indeks keanekaragaman semua stasiun termasuk kategori sedang. Indeks keseragaman rendah sampai  tinggi. Terdapat dominansi species di Stasiun B (vegetasi pohon) dan C (vegetasi sapling).  Pola sebaran krustasea mengelompok. Nilai indeks kesamaan komunitas termasuk kategori rendah dan tinggi. Secara umum jumlah krustasea pada infra ordo Brachyura jantan lebih banyak dari betina, dan jumlah infra ordo Brachyura betina yang bertelur 23,07% dari jumlah betina yang ditemukan. Kata Kunci : Mangrove, Krustasea, Komposisi dan Kelimpahan

oai:ojs.ejournal.undip.ac.id:article/37976 2022-10-23T19:50:02Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/37976 2022-10-23T19:50:02Z Buletin Oseanografi Marina Vol 11, No 2 (2022): Buletin Oseanografi Marina; 185-192 Yusuf, Muh; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Adibrata, Sudirman; Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Perikanan Dan Biologi, Universitas Bangka Belitung Irvani, Irvani; Program Studi Teknik Pertambangan, Fakultas Teknik, Universitas Bangka Belitung Pamungkas, Aditya; Program Studi Ilmu Kelautan, Fakultas Pertanian Perikanan Dan Biologi, Universitas Bangka Belitung Hudatwi, Mu’alimah; Program Studi Ilmu Kelautan, Fakultas Pertanian Perikanan Dan Biologi, Universitas Bangka Belitung 2022-05-20 08:05:01 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/37976 dinamika; logam berat perairan; Pb dan Cu; sebaran; tambang id Banyaknya aktivitas penambangan timah di Bangka Belitung menyebabkan pencemar logam berat terakumulasi ke badan perairan, salah satunya adalah kegiatan penambangan timah di perairan Tanah Merah. Penelitian dilaksanakan pada bulan April - November 2019 di Pantai Tanah Merah Kabupaten Bangka Tengah. Tujuan penelitian ini yaitu mengetahui konsentrasi polutan logam berat (Pb dan Cu) di perairan tersebut. Metode penelitian dilakukan dengan cara purposive sampling dan melakukan analisis logam berat (Pb dan Cu) serta pemodelan menggunakan MIKE21 untuk mengetahui persebarannya. Hasil menunjukkan bahwa model sebaran polutan logam berat sangat dipengaruhi oleh kondisi arus yang dominan berupa arus pasang surut. Model sebaran Pb dan Cu di perairan terkonsentrasi di area sumber pencemar yang telah berada di atas baku mutu air laut dan semakin kecil menjauhi sumber lokasi pertambangan sesuai dengan arah arus perairan. Pemodelan menunjukkan bahwa jarak sebaran terjauh dan arah dari polutan logam berat (Pb dan Cu) di perairan, masing-masing sebesar 7,51 mil (12.086 meter); 6,17 mil (9.929 meter) dengan waktu tempuh 68 dan 62 hari dan arah polutan 330oU. Pola sebaran logam berat yang sangat luas ini mengindikasikan bahwa aktifitas pertambangan tidak direkomendasikan pada lokasi yang berdekatan dengan fishing ground  karena efek sebaran logam berat yang berbahaya akan terakumulasi pada biota bahkan ekosistem perairan.   

oai:ojs.ejournal.undip.ac.id:article/2990 2012-04-03T06:28:35Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/2990 2012-04-03T06:28:35Z Buletin Oseanografi Marina Vol 1, No 1 (2011): Buletin Oseanografi Marina Wirasatriya, Anindya The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/2990 en Abstract The aim of this research is to investigate the distribution pattern of chlorophyl a and total suspended solid (TSS) at Toli toli Bay. The research was conducted in May 2009 by using research vessel Baruna Jaya VIII at 11 sampling stations in Toli toli Bay. Based on the distribution patterns of chlorophyll a, Toli toli Bay is categorized in good condition. Chlorophyll a concentrations were about 2.43 mg/m3 and ranged from 0.6-6.14 mg/m3. Horizontally, high chlorophyll a distribution were found in areas near estuary and reduced toward the open ocean. Vertically, the maximum chlorophyll a concentration was found in 25 m depth and then decreased until 100 m depth. TSS concentrations were about 7.65 mg/l and ranged from 5.8-10.4 mg/l which is still under the quality standard of the Ministry of Environment.   KeyWords    : Chlorophyl a, Total suspended solid (TSS), Toli toil, Sulawesi

oai:ojs.ejournal.undip.ac.id:article/72311 2025-10-18T16:38:18Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/72311 2025-10-18T16:38:18Z Buletin Oseanografi Marina Vol 14, No 3 (2025): Buletin Oseanografi Marina; 369-377 Aditiara, Aqilla; Fisheries Product Technology Study Program, Faculty of Fisheries and Marine Science, Universitas Diponegoro Agustini, Tri Winarni; Fisheries Product Technology Study Program, Faculty of Fisheries and Marine Science, Universitas Diponegoro Wijayanti, Ima; Fisheries Product Technology Study Program, Faculty of Fisheries and Marine Science, Universitas Diponegoro 2025-10-18 15:20:01 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/72311 Butterfly pea flower; catfish skin, gelatine; jelly candy en Gelatine, derived from fish skin collagen hydrolysis.  The hydrocolloid properties of gelatine make it used as a gelling agent in making jelly candy. Butterfly pea flowers contain antioxidants and produce a purplish blue color so that it can be used as a natural coloring in jelly candy. The purpose of this study was to determine the physicochemical characteristics of butterfly pea flower jelly candy with different concentrations of catfish skin gelatine. Catfish skin gelatine is obtained from the process of protein hydrolysis using citric acid solution (C6H8O7). The treatments were different concentrations of 4%, 8%, and 12% catfish skin gelatine in butterfly pea flower jelly candy. The results showed that increasing the concentration of catfish skin gelatine had a significant effect (p<0.05) on texture profile, moisture content, ash content, protein content, antioxidants, and hedonic parameters, but did not have a significant effect (p>0.05) on color parameters. The addition of 8% gelatinee produced the best jelly candy characteristics with a hardness of 3.7 kgf, cohesiveness of 0.41, springiness of 10.9 mm, gumminess of 1.42 kgf, and chewiness of 15.62 kgf.mm-1, fracture force of 3.17 kgf, adhesiveness of -0.3 kgf.mm, moisture content of 15.65%, protein of 9.03%, ash content of 2.26%, IC50 of 85.14 ppm, L*-value of 19.51, a*-value of 0.44, b*-value of 0.63, and hedonic of 7.30<µ<7.76. The addition of gelatine with proper concentration in butterfly pea flower jelly candy produces the best texture, moisture content, ash content, protein content, antioxidants, and hedonic characteristics, but does not affect color.

oai:ojs.ejournal.undip.ac.id:article/20686 2020-04-17T12:07:02Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/20686 2020-04-17T12:07:02Z Buletin Oseanografi Marina Vol 7, No 2 (2018): Buletin Oseanografi Marina; 81-90 Hardiyanti, Anggun Sri; Departemen Ilmu Kelautan, Universitas Diponegoro Sunaryo, Sunaryo; Departemen Ilmu Kelautan, Universitas Diponegoro Riniatsih, Ita; Departemen Ilmu Kelautan, Universitas Diponegoro Santoso, Adi; Departemen Ilmu Kelautan, Universitas Diponegoro 2018-10-08 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/20686 Kepiting bakau; Morfometrik; Perairan Semarang; Tingkat kematangan gonad; Mangrove crab; Morphometric; Semarang waters; Gonad maturity level id Kepiting bakau (Scylla sp.) merupakan komoditas perikanan yang memiliki nilai ekonomi tinggi. Permintaan terhadap komoditas kepiting dari tahun ke tahun cenderung meningkat, sehingga dalam memenuhi semua permintaan ini seluruhnya berasal dari hasil tangkapan di alam, yaitu sebesar 70% dan banyaknya penangkapan kepiting bakau tanpa memperhatikan ukuran yang layak tangkap. Penelitian ini bertujuan untuk mengkaji biomorfometrik kepiting bakau, meliputi jumlah, distribusi, nisbah kelamin, hubungan lebar karapas dan berat, faktor kondisi dan tingkat kematangan gonad. Penelitian menggunakan metode deskriptif eksploratif. Penelitian dilaksanakan pada bulan  Mei – Juni 2017 di kawasan perairan Semarang, yaitu di Mangkang Wetan, Tapak, Tanah Mas dan Tambak Lorok. Hasil penelitian menunjukkan, bahwa jumlah kepiting bakau yang diamati sebanyak 616 ekor, terdiri atas 362 betina (58,77%) dan 254 jantan (41,23%), perbandingan betina dan jantan 1,43 : 1. Ukuran lebar karapas berkisar antara 47,05 - 132,56 mm dengan berat berkisar antara 33,02 - 513,09 g. Hubungan lebar karapas dengan berat bersifat allometrik negatif dan positif. Nilai faktor kondisi yang didapatkan berkisar 1,368 – 9,752. Tingkat kematangan gonad kepiting betina maupun jantan didominasi oleh TKG II dan III, dengan demikian diduga pada bulan Mei – Juni di perairan Semarang sedang terjadi masa pemijahan. Biomorphometry of Mangrove Crab (Scylla sp.) Catched in SemarangMangrove crab (Scylla sp.) is one of the fishery commodities that have high economic value. The demand for crab commodity from year to year tends to increase, in order to fulfilling all these demands almost all of them come from the catch in nature that is equal to 70%, and this led to the occurrence of a lot of mangrove crab catching regardless of the size of the catch. This study aimed to examine the biomorphometric of mangrove crab, which includes the composition, sex ratio distribution, widht and weight relation, condition factors and gonad maturity level. The descriptive explorative methods was used in this research. This research was conducted from May - June 2017 in the Semarang waters included Mangkang Wetan, Tapak, Tanah Mas and Tambak Lorok. The results showed that the composition of mangrove crab were 616, consist of 362 females (58,77%) and 254 males (41,23%), with the comparison of female and male ratio of 1,43 : 1. The size of the obtained carapace width ranged from 47,05 - 132,56 mm with the size of the weight ranged from 33,02 – 512,09 g. The relations between width and weight of caparace indicated allometric. The value of the obtained condition factor ranged from 1,368 – 9,752. Gonad maturity level of male and female mangrove crab was dominated by TKG II and III, because the research location was in the spawning period.

oai:ojs.ejournal.undip.ac.id:article/51454 2023-05-13T09:22:51Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/51454 2023-05-13T09:22:51Z Buletin Oseanografi Marina Vol 12, No 1 (2023): Buletin Oseanografi Marina; 142-152 Ridarto, Arij Kemala Yasmin; Department of Oceanography, Faculty of Fisheries and Marine Sciences, Universitas Diponegoro Center for Coastal Rehabilitation and Disaster Mitigation Studies, Universitas Diponegoro Zainuri, Muhammad; Department of Oceanography, Faculty of Fisheries and Marine Sciences, Universitas Diponegoro Center for Coastal Rehabilitation and Disaster Mitigation Studies, Universitas Diponegoro Helmi, Muhammad; Oceanography Department, Faculty of Fisheries and Marine Science, Universitas Diponegoro Center for Coastal Rehabilitation and Disaster Mitigation Studies, Universitas Diponegoro Kunarso, Kunarso; Department of Oceanography, Faculty of Fisheries and Marine Sciences, Universitas Diponegoro Baskoro, Baskoro; Oceanography Department, Faculty of Fisheries and Marine Science, Universitas Diponegoro Maslukah, Lilik; Oceanography Department, Faculty of Fisheries and Marine Science, Universitas Diponegoro Endrawati, Hadi; Marine Science Department, Faculty of Fisheries and Marine Science, Universitas Diponegoro Handoyo, Gentur; Oceanography Department, Faculty of Fisheries and Marine Science, Universitas Diponegoro Koch, Magaly; Department of Earth and Environment, Center for Remote Sensing, Boston University 2023-02-04 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/51454 Total Suspended Solid; Coastal Waters; Geospatial; Anthropogenic; Pekalongan. en Changes in total suspended solids (TSS) concentrations provide information to determine the quality of the carrying capacity of waters as marine resources. This research aims to analyze the concentration and distribution of TSS in marine waters due to anthropogenic impacts on land. The concentration and distribution changes of TSS were analyzed using a geospatial model approach. The in-situ data were collected in August 2021 and June 2022 at 11 stations in the east monsoon and analyzed in the laboratory using the gravimetric method. The results show that TSS concentration changes at the study area significantly increased concentration from 40,3-85,4 mg/L in 2021 to 64,7-140,5 mg/L in 2022, increased by 37,6 – 39,2%, distributed to the east in open water due to the influence of the surface current, which is driven by the wind and tidal current. The anthropogenic factors, such as land use and micro-industrial activities, were dominantly correlated with the increase in TSS concentration in the waters, which is driven by input from land due to the influence of precipitation. This research provides comprehensive monitoring, evaluating, and managing scheme data and information to researchers, local governments, and environmentalists for mitigation planning to reduce the subtraction of water quality due to anthropogenic impacts.

oai:ojs.ejournal.undip.ac.id:article/6939 2014-05-22T02:35:58Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6939 2014-05-22T02:35:58Z Buletin Oseanografi Marina Vol 2, No 2 (2013): Buletin Oseanografi Marina; 48-53 Handoko, Handoko; Jurusan Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Yusuf, Muhammad; Jurusan Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Wulandari, Sri Yulina; Jurusan Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2013-04-18 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6939 en Kepulauan Karimunjawa memiliki karakteristik daerah yang semi tertutup, karena dikelilingi oleh gugusan pulau-pulau, baik gugusan pulau besar maupun pulau kecil, dan merupakan ekosistem terumbu karang. Penelitian ini bertujuan untuk mengetahui konsentrasi  nitrat (NO3-), fosfat (PO4-), dan keterkaitannya dengan kelimpahan fitoplankton di perairan Karimunjawa.. Penelitian ini dilaksanakan pada tanggal 22–27 September 2012 di Kepulauan Karimunjawa. Data yang digunakan sebagai data primer adalah  fisika kimia oseanografi, konsentrasi nitrat, konsentrasi fosfat, kelimpahan fitoplankton dan data arus. Metode penelitian yang digunakan dalam penelitian adalah metode eksploratif dan penentuan titik sampling menggunakan purposive sampling method . Analisis data untuk sebaran nitrat, fosfat, dan kelimpahan fitoplankton menggunakan ArcGis dan untuk pola arus menggunakan model ADCIRC. Hasil penelitian menunjukkan bahwa nitrat mempunyai nilai sebaran antara 0.108-1.595mg/l. Fosfat memiliki nilai kisaran antara 1.769-4.030 mg/l. Kelimpahan fitoplankton nilai sebaran antara 32-292  sel/ml. Berdasarkan data tersebut, dapat diketahui bahwa sebaran nitrat dan fosfat terkait erat dengan sebaran fitoplankton, meskipun pada kuantitas yang tidak selalu sama. Kata Kunci : Nitrat, Fosfat, Sebaran Fitoplankton, Karimunjawa

oai:ojs.ejournal.undip.ac.id:article/52048 2024-05-31T07:50:39Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/52048 2024-05-31T07:50:39Z Buletin Oseanografi Marina Vol 13, No 1 (2024): Buletin Oseanografi Marina; 41-51 Annisa, Annisa; Jurusan Ilmu Kelautan, Fakultas Ilmu Kelautan dan Perikanan, Universitas Maritim Raja Ali Haji Febrianto, Try; Jurusan Ilmu Kelautan, Fakultas Ilmu Kelautan dan Perikanan, Universitas Maritim Raja Ali Haji Nugraha, Aditya Hikmat; Jurusan Ilmu Kelautan, Fakultas Ilmu Kelautan dan Perikanan, Universitas Maritim Raja Ali Haji 2024-02-06 14:07:56 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/52048 Bintan; Bivalve; Ecosystem; Gafrarium pectinatum; lamun id Ekosistem lamun memiliki kaitan yang erat dengan keberadaan bivalvia. Kondisi struktur ekosistem lamun yang berbeda-beda di Perairan Pulau Bintan diduga dapat berpengaruh terhadap asosiasi bivalvia pada ekosistem lamun. Penelitian ini bertujuan untuk mendeskripsikan struktur ekosistem lamun dan mempelajari struktur asosiasi bivalvia pada beberapa ekosistem lamun di Pesisir Pulau Bintan. Terdapat 4 stasiun pengamatan yang diamati pada penelitian ini. Penentuan lokasi penelitian berdasarkan keterwakilan sebaran ekosistem lamun di Pulau Bintan, dengan kondisi tutupan lamun yang berbeda, yaitu meliputi: Dompak, Pengudang, Teluk Bakau dan Pengujan. Metode sampling menggunakan transek kuadrat yang dipadukan dengan 3 buah transek garis sepanjang 100 m ke arah laut. Diperoleh 7 jenis lamun yang tersebar di 4 lokasi penelitian. Tutupan lamun tertinggi terdapat di Pesisir Pengudang dengan nilai tutupan sebesar 66.1%.  Ditemukan 28 spesies bivalvia dengan  nilai kepadatan tertinggi yaitu Gafrarium pectinatum. Hasil analisis PCA menunjukkan bahwa tutupan lamun memiliki keterikatan dengan kepadatan bivalvia. Beberapa bivalvia memiliki kecenderungan untuk hidup pada vegetasi lamun tertentu.  Seagrass ecosystems have a close relationship with the existence of bivalves. The different structural conditions of the seagrass ecosystem in the waters of Bintan Island are thought to influence the association of bivalves in the seagrass ecosystem. This study aims to describe the structure of seagrass ecosystems and study the structure of bivalve associations in several seagrass ecosystems on the coast of Bintan Island. There are four observation stations observed in this study. The determination of the research location was based on the representation of the distribution of seagrass ecosystems on Bintan Island, with different seagrass cover conditions, including: Dompak, Pengudang, Bakau Bay and Pengujan. The sampling method uses a quadratic transect combined with 3 line transects along 100 m seaward, obtaining 7 types of seagrasses scattered in 4 research locations. The highest seagrass cover was found in Pengudang Coastal Area, with a cover value of 66.1%. Found 28 species of bivalves with the highest density value, namely Gafrium pectinatum. PCA analysis results show that seagrass cover has an attachment to the density of bivalves. Some bivalves tend to live on specific seagrass vegetation.

oai:ojs.ejournal.undip.ac.id:article/39205 2023-11-04T02:49:24Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/39205 2023-11-04T02:49:24Z Buletin Oseanografi Marina Vol 12, No 3 (2023): Buletin Oseanografi Marina; 395-402 Putriany, Altysia; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Widianingsih, Widianingsih; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Endrawati, Hadi; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Hartati, Retno; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2023-10-01 07:31:31 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/39205 bioakumulasi; Chlorella vulgaris; mikroalga; timbal id Usaha untuk menghilangkan logam berat merupakan suatu proses pengolahan air limbah yang sangat penting. Beberapa metode telah dilakukan baik dengan metode kimia maupun fisika, namun perlakuan secara biologi dianggap lebih murah dan aefektif.  Chlorella vulgaris merupakan salah satu jenis mikroalga yang mempunyai kemampuan menyerap dan menghilangkan logam berat seperti timbal (Pb) di air limbah.  Penelitian ini bertujuan untuk mengetahui pengaruh logam berat timbal (Pb) pada media pemeliharaan yang berbeda terhadap pertumbuhan dan bioakumulasinya pada C. vulgaris. . Metode eksperimen laboratorium dengan lima perlakuan konsentrasi logam berat timbal (Pb) pada media budidaya C vulgaris yang berbeda, yaitu 0, 25, 50, 75, dan 100 ppm. Setiap perlakuan dengan tiga ulanga. Mikroalga C. vulgaris dikultur selama 7 hari dan pada akhir penelitian kepadatannya dihitung dan kandungan Pbnya dianalisa dengan menggunakan Atomic Absorption SpectrophotometerHasil penelitian menunjukkan bahwa semakin tinggi konsentrasi Pb pada media, semakin menghambat pertumbuhan C. vulgaris. C. vulgaris mampu mengakumulasi logam Pb dengan efisiensi penyerapannya sebesar 0,34% pada konsentrasi 100 ppm. Analisis varian memperlihatkan konsentrasi Pb memberikan pengaruh yang nyata (p<0,05) pada pertumbuhan, dan kemampuan akumulasi Pb pada C. vulgaris.  In the wastewater treatment process, the removal of heavy metals is very important. The process has applied various chemical and physical methods, and the biological method is believed to be the most efficient and cheapest.  Chlorella vulgaris is one species of microalgae that has ability to absorb and accumulate heavy metals such as lead (Pb). Chlorella can grow in extreme environments and withstand outside influences, better than other types of microalgae. This study aims to determine the influence of lead (Pb) in the culture media on the growth and bioaccumulation of C. vulgaris. The laboratory experiment method was applied with several Pb concentrations in the culture media of C. vulgaris, i.e. 0, 25, 50, 75, and 100 ppm. The treatments were triplicated. The C. vulgaris was cultured for seven days, and in the end of the experiment, the density was counted, and the Pb was analyzed using Atomic Absorption Spectrophotometer The results showed that the higher concentrations of Pb in the culture media gave the most inhibiting growth of C. vulgaris. C. vulgaris accumulate Pb at a concentration of 100 ppm in the culture media with an absorption efficiency of 0.34%. It revealed that the difference in Pb concentration give significant effect (p<0.05) on the growth and Pb accumulation capability of C. vulgaris.

oai:ojs.ejournal.undip.ac.id:article/31662 2021-06-08T16:31:14Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/31662 2021-06-08T16:31:14Z Buletin Oseanografi Marina Vol 10, No 2 (2021): Buletin Oseanografi Marina; 112-122 Rachman, Reno Arief; Balai Teknologi Infrstruktur Pelabuhan dan Dinamika Pantai, Badan Pengkajian dan Penerapan Teknologi Wibowo, Mardi; Pusat Teknologi Rekayasa Industri Maritim, Badan Pengkajian dan Penerapan Teknologi Wiguna, Edwin Adi; Balai Teknologi Infrstruktur Pelabuhan dan Dinamika Pantai, Badan Pengkajian dan Penerapan Teknologi Nugroho, Sapto; Pusat Teknologi Rekayasa Industri Maritim, Badan Pengkajian dan Penerapan Teknologi Madyani, Madyani; Balai Teknologi Infrstruktur Pelabuhan dan Dinamika Pantai, Badan Pengkajian dan Penerapan Teknologi Santoso, Budi; Balai Teknologi Infrstruktur Pelabuhan dan Dinamika Pantai, Badan Pengkajian dan Penerapan Teknologi 2021-05-22 17:24:26 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/31662 sedimentation; sea bottom sediment; sungailiat; sediment control, port id Tingkat sedimentasi di muara S. Jelitik sangat tinggi sehingga ketika air laut surut, kapal-kapal tidak dapat keluar masuk ke Pelabuhan Perikanan Nusantara (PPN) Sungailiat. Untuk menangani masalah tersebut, pemerintah secara periodik melakukan pengerukan yang berbiaya tinggi. Oleh karena itu, Pemprov Bangka Belitung merencanakan membangun infrastruktur pengendali sedimen. Dalam perencanaan infrastruktur pengendali sedimen diperlukan data-data karakteristik sedimen dasar. Saat ini kajian khusus karateristik sedimen dasar di kawasan ini masih belum ada. [A1] Oleh karena itu dilakukan kajian ini dengan tujuan mengetahui pola sebaran karakteristik sedimen dasar seperti berat jenis, tekstur sedimen, ukuran d50 butir sedimen dan analisis stastik sedimen dasar. Karakteristik ini sangat penting untuk kajian sedimentasi selanjutnya terutama sebagai data masukan perhitungan kecepatan sedimentasi baik secara analitik maupun dengan pemodelan numerik. Metode yang digunakan dalam kajian ini adalah survei lapangan, pengambilan sampel sedimen dasar, analisis laboratorium dan analisis statistik sedimen. Berdasarkan kajian ini sedimen dasar di perairan Sungailiat ini didominasi oleh pasir sedikit campuran kerikil dengan nilai d50 berkisar antar 1-1,5 mm dan terpilah buruk. Kondisi sedimen dasar berupa pasir mempunyai daya dukung yang baik untuk pengembangan pelabuhan.Sedimentation in the S Jelitik estuary is very high, so when the tide is low, the ships traffic at the Sungailiat Fisheries Port is disturbed. So far, dredging has been done to solve this problem, which requires high costs. To overcome this, the Provincial Government of Bangka Belitung plans to build a sediment control infrastructure. In planning the sediment control infrastructure, sea bottom sediment characteristics data are needed. Currently, there is no specific study of se bottom sediment characteristics in this area. Therefore, this study was conducted with the aim of knowing the distribution pattern of seabottom sediment characteristics such as density, sediment texture, d50 grain size and analysis of the basic sediment statistics. This characteristic is very important for further sedimentation studies, especially as input data for calculating the sedimentation velocity both analytically and by numerical modeling. The methods used in this study are field surveys, sediment sampling, laboratory analysis and sediment statistical analysis. Based on this study, the seabottom sediment in Sungailiat waters is dominated by sand, a little mixture of gravel, with d50 values ranging from 1-1.5 mm and poorly segregated. The seabottom sediment in the form of sand have good capacity for port development.  

oai:ojs.ejournal.undip.ac.id:article/61216 2024-11-04T07:16:45Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/61216 2024-11-04T07:16:45Z Buletin Oseanografi Marina Vol 13, No 3 (2024): Buletin Oseanografi Marina; 391-400 Isnaini, Isnaini; Jurusan Ilmu Kelautan, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas sriwijaya Diansyah, Gusti; Laboratorium Oseanografi dan Instrumentasi Kelautan, Universitas Sriwijaya Ulqodry, Tengku Zia; Laboratorium Bioekologi Kelautan, Universitas Sriwijaya Surbakti, Heron; Laboratorium Oseanografi dan Instrumentasi Kelautan, Universitas Sriwijaya Arsyei, Laksamana Fachryzal; Laboratorium Penginderaan Jauh dan Sistem Informasi Geografis Kelautan, Universitas Sriwijaya Aryawati, Riris; Jurusan Ilmu Kelautan FakultasMatematika dan Ilmu Pengetahuan Alam, Universitas Sriwijaya 2024-10-30 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/61216 Klorofil-a, Citra Landsat-8, Muara Banyuasin, Algoritma Wibowo et al. (1994) id Perairan Muara Sungai Banyuasin merupakan daerah yang sangat dinamis dan biasa  dimanfaatkan untuk aktivitas masyarakat sekitar, sehingga mempengaruhi perubahan kondisi perairan. Klorofil-a merupakan salah satu parameter produktivitas primer yang dapat mengetahui kualitas perairan. Teknologi penginderaan jauh dapat mempermudah dalam mendapatkan distribusi dan konsentrasi klorofil-a di perairan. Tujuan penelitian ini untuk menguji akurasi citra Landsat-8 yang sesuai dalam mengekstraksi konsentrasi klorofil-a di perairan Muara Sungai Banyuasin menggunakan algoritma Wibowo et al. (1994) dan Pentury (1997), mengetahui pola sebaran secara spasial klorofil-a pada data lapangan dan data citra di Muara Sungai Banyuasin, serta menganalisis distribusi klorofil-a pada tiap musim tahun 2022 di Muara Sungai Banyuasin. Penelitian ini telah dilaksanakan pada bulan Oktober – November 2022. Hasil penelitian ini menunjukkan uji validasi antara kedua algoritma didapatkan algortima Wibowo et al. (1994) dari persamaan regresi linear (y = 1,4691x - 1,2669) yang lebih sesuai dengan R2 0,918 dan RMSE terendah yaitu 0,0924. Pola sebaran konsentrasi klorofil-a di Muara Sungai Banyuasin antara data lapangan dengan data citra menunjukkan nilai yang tidak jauh berbeda, dengan nilai pada insitu berkisar 2,22–3,35 mg/m3 sedangkan data citra 1,68–3,79 mg/m3. Rata-rata konsentrasi pada musim barat, peralihan I, timur, dan peralihan II pada tahun 2022 sebesar 2,41–3,71 mg/m3.  The Banyuasin River Estuary are very dynamic area and usually used for the activities of the surrounding community, thereby affecting changes in water conditions. Chlorophyll-a is one of the primary productivity parameters that can determine water quality. Remote sensing technology can make it easier to get the distribution and concentration of chlorophyll-a in waters. The purpose of this study was to test the accuracy of Landsat-8 imagery that is suitable for extracting chlorophyll-a concentrations in the Banyuasin River Estuary waters using the Wibowo et al. algorithm. (1994) and Pentury (1997), determined the spatial distribution pattern of chlorophyll-a in field data and image data in the Banyuasin River Estuary, and analyzed the distribution of chlorophyll-a in each season in 2022 in the Banyuasin River Estuary. This research was held in October to November 2022. The results of this study showed that the validation test between the two algorithms was obtained by the Wibowo et al. (1994) from the linear regression equation (y = 1,4691x-1,2669) which is more suitable with the R2 of 0.918 and the lowest RMSE of 0,0924. The distribution pattern of chlorophyll-a concentrations in the Banyuasin River Estuary between field data and image data shows values that are not much different, with insitu values ranging from 2.22–3.35 mg/m3 while image data is 1,68–3,79 mg/m3 . The average concentration in the west season, transition I, east, and transition II in 2022 is 2,41–3,71 mg/m3.

oai:ojs.ejournal.undip.ac.id:article/11297 2020-04-17T12:02:13Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/11297 2020-04-17T12:02:13Z Buletin Oseanografi Marina Vol 5, No 1 (2016): Buletin Oseanografi Marina; 60-63 Arfiyan, Arfiyan; PT Pura Baruna Lestari, Pulau Sambangan Kepulauan Karimunjawa, Kabupaten Jepara - Jawa Tengah Munasik, Munasik; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2016-04-03 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/11297 en Kombinasi data suhu air laut dari pengukuran lapangan secara tahunan dan data meteorologi Near Real Time dari satelit bisa digunakan sebagai acuan untuk mengaitkan kondisi musim suatu perairan. Kondisi Perairan Pulau Genting mempunyai dua pola suhu rendah yaitu pada musim monsoon barat laut JFM (Januari, Februari, Maret) dan musim monsoon tenggara JAS (Juli, Agustus, September). Sedangkan pola suhu tinggi terjadi pada musim transisi AMJ (April, Mei, Juni) dan musim transisi OND (Oktober, November, Desember). Pola suhu air laut tahunan menunjukan bahwa suhu tahunan di Pulau Genting sangat dipengaruhi oleh kecepatan angin dibandingkan Insolation Clearness Index dan Curah Hujan pada semua musim. Kata kunci: Suhu Air Laut Tahunan, Musim, Kecepatan Angin

oai:ojs.ejournal.undip.ac.id:article/42749 2022-05-20T01:15:04Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/42749 2022-05-20T01:15:04Z Buletin Oseanografi Marina Vol 11, No 1 (2022): Buletin Oseanografi Marina; 99-110 Suwarman, Rusmawan; Kelompok Keahlian Sains Atmosfer, Fakultas Ilmu dan Teknologi Kebumian, Institut Teknologi Bandung Riawan, Edi; Kelompok Keahlian Sains Atmosfer, Fakultas Ilmu dan Teknologi Kebumian, Institut Teknologi Bandung Simanjuntak, Yogi Sahat Maruli; Program Studi Magister Sains Kebumian, Fakultas Ilmu dan Teknologi Kebumian, Institut Teknologi Bandung Irawan, Dasapta Erwin; Kelompok Keahlian Geologi Terapan, Fakultas Ilmu dan Teknologi Kebumian, Institut Teknologi Bandung 2022-01-31 11:57:56 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/42749 perubahan iklim; curah hujan; temperatur; ekstrem; pesisir id Sebagai ibu kota negara dan pusat berbagai kegiatan ekonomi, Jakarta terus mengalami pertumbuhan penduduk dan infrastruktur. Pembangunan ekonomi ini pun mengalami pergeseran ke wilayah pesisir utara Jakarta. Di sisi lain, perubahan iklim adalah permasalahan yang harus dihadapi secara global, termasuk Jakarta. Strategi pembangunan perlu mempertimbangkan aspek-aspek perubahan iklim untuk mengurangi potensi dampak-dampak lingkungan yang akan terjadi. Makalah ini bertujuan untuk menampilkan kondisi iklim saat ini di daerah pesisir utara Jakarta dan potensi perubahannya di masa yang akan datang. Informasi iklim didapatkan dari Badan Meteorologi Klimatologi Geofisika (BMKG), sedangkan informasi proyeksi iklim sampai tahun 2100, didapatkan dari data 21 member dari model iklim global (Global Circulation Models, GCMs). Metode yang digunakan adalah statistical downscaling quantile bias correction untuk mendapatkan informasi proyeksi iklim lokal. Analisa yang disajikan dalam kajian ini adalah analisa ekstrem secara statistik untuk variabel temperatur dan curah hujan. Hasilnya menunjukkan bahwa kondisi iklim baseline sudah mengalami tren kenaikan temperatur sebesar 1,1 C. Potensi kenaikan temperatur ini akan berlanjut sampai 0,5 – 1 C di tahun 2050 dan 1 - 3 C di tahun 2100. Pada variabel curah hujan, perubahan iklim di masa akan datang berdampak mempercepat awal dan memperlama musim hujan. Model-model iklim menunjukan bahwa curah hujan ekstrem akan naik antara 15-26 % pada periode ulang 100 tahun dari kondisi iklim saat ini.  As the capital city and the center of various economic activities, Jakarta continues to experience population growth and infrastructure. On the other hand, climate change is an issues that must be faced globally, including Jakarta. Development strategies need to consider the aspects of climate change to reduce potential environmental impacts that will occur. The purpose of this study is to understand the current climate and its potential for future changes in the northern coastal area of Jakarta. Current climate information is obtained from meteorological data from the Meteorology Climatology Geophysics Agency (BMKG) observation station, while climate information of future climate projections, up to 2100, is obtained from 21 member data from Global Circulation Models (GCMs) . The method used is statistical downscaling quantile bias correction to obtain local climate projection information. The analysis presented in this study is a statistical extreme analysis for the variables of the temperature and the rainfall. Based on observation data, the baseline climatic conditions have experienced an increasing trend of temperature of 1.1 C. The potential for this temperature increase will continue to 0.5 – 1 C in 2050 and 1-3 C in 2100. Meanwhile, on the rainfall variable, future climate change has an impact on early of the start and prolonging the rainy season. The climate models show that extreme rainfall will increase between 15-26 % in the 100-year return period of current climatic conditions.

oai:ojs.ejournal.undip.ac.id:article/2968 2012-04-03T02:37:47Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/2968 2012-04-03T02:37:47Z Buletin Oseanografi Marina Vol 1, No 1 (2011): Buletin Oseanografi Marina Wulandari, Sri Yulina The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/2968 en Abstract The aims of this research was to study accumulation rate of Pb in both King Cat Fishes (Clarias gariepenus) and waterhyacinth (Eichornia crassipes), so was decreasing rate of Pb in waste water of pulp and paper industry. This research was experimental laboratorism. Eighteenth glass wessel were filled 10 litres the mixture of pulp and paper waste water and fresh water whereas  40% volume of pulp and paper waste water. The result sowed that Pb heavy metal content in both King Cat Fishes and waterhyacinths increased by  time treatment. Pb content in head of fishes was greater by aeration than that in body of fishes without aeration. Pb content in waterhyacinths was greater by aeration than that without aeration. Pb content in waste water decreased by time  treatment. The decreasing rate of Pb in waste water was greater by aeratin than that without aeration.   Key words: Uptake Pb, waste water, pulp and paper industry, King Cat  Fish, waterhyacinth

oai:ojs.ejournal.undip.ac.id:article/70661 2026-02-11T04:49:13Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/70661 2026-02-11T04:49:13Z Buletin Oseanografi Marina Vol 14, No 2 (2025): Buletin Oseanografi Marina; 255-266 Mustofa, Arif; Program Doktoral Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Zainuri, Muhammad; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Kunarso, Kunarso; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Maslukah, Lilik; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2025-06-10 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/70661 produktivitas; garam; curah hujan id Curah hujan merupakan faktor utama produksi garam rakyat di timur laut Jawa Tengah, Indonesia. Teknologi penguapan total dalam produksi garam dengan mengandalkan radiasi matahari. Kondisi ini menyebabkan produksi garam bergantung pada sinar matahari dan intensitas curah hujan. Analisis dilakukan untuk membahas dampak variabilitas curah hujan terhadap fluktuasi produktivitas garam. Penelitian dilakukan pada kabupaten yaitu Rembang, Pati, Jepara dan Demak pada tahun 2018-2023. Metode yang digunakan adalah deskriptif melalui perbandingan data produksi garam dengan data intensitas curah hujan. Data berupa jumlah produksi dan luas lahan garam diperoleh dari Dinas Kelautan dan Perikanan masing-masing kabupaten, sedangkan data curah hujan diperoleh dari BMKG Stasiun Klimatologi Jawa Tengah. Hasil analisis menunjukkan bahwa pada tahun 2018 dan 2019 curah hujan rata-rata sebesar 0,03 mm pada bulan Juli - Oktober menyebabkan produktivitas garam di atas 100 ton/Ha. Tahun 2020-2022 hujan terjadi sepanjang tahun menyebabkan penurunan produksi garam. Seluruh kabupaten penghasil garam di timur laut Jawa Tengah yaitu Rembang, Pati, Jepara dan Demak mengalami penurunan produksi garam rata-rata sebesar 26,76% pada tahun 2020-2022 dan terjadi peningkatan curah hujan rata-rata sebesar 15,58%. Sedangkan pada tahun 2023 terjadi peningkatan produksi garam sebesar 279,94% dari tahun sebelumnya dengan curah hujan yang menurun 27,28%.   Rainfall is a major factor in artisanal salt production in northeast Central Java, Indonesia. Total evaporation technology in salt production relies on solar radiation. This makes salt production dependent on sunlight and rainfall intensity. Analyses were conducted to discuss the impact of rainfall variability on fluctuations in salt productivity. The research was conducted in four districts namely Rembang, Pati, Jepara and Demak in 2018-2023. The method used is descriptive through comparison of salt production data with rainfall intensity data. Data in the form of total production and salt land area were obtained from the Department of Marine Affairs and Fisheries of each district, while rainfall data were obtained from the BMKG Central Java Climatology Station. The results of the analysis show that in 2018 and 2019 the average rainfall of 0.03 mm in July - October caused salt productivity above 100 tonnes / ha. In 2020-2022, rainfall occurred throughout the year causing a decrease in salt production. All salt-producing districts in northeast Central Java, namely Rembang, Pati, Jepara and Demak, experienced a decrease in salt production by an average of 26.76% in 2020-2022 and an increase in average rainfall by 15.58%. Whereas in 2023 there was an increase in salt production by 279.94% from the previous year with rainfall decreasing by 27.28%.

oai:ojs.ejournal.undip.ac.id:article/19037 2020-05-29T08:06:09Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/19037 2020-05-29T08:06:09Z Buletin Oseanografi Marina Vol 7, No 1 (2018): Buletin Oseanografi Marina; 9-14 Romadhon, Romadhon; Program Studi Teknologi Hasil Perikanan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Suharto, Selamet; Program Studi Teknologi Hasil Perikanan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Sumardianto, Sumardianto; Program Studi Teknologi Hasil Perikanan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2018-05-24 17:39:40 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/19037 Mimi blood; darah mimi; Pathogen Bacteria;, Phytochemistry en Kepiting tapal kuda atau mimi lan mintuno atau belangkas (suku Limulidae) mencakup empat jenis hewan beruas (Artropoda) yang menghuni perairan dangkal wilayah payau dan kawasan mangrove. Mimi merupakan salah satu sumberdaya genetika yang dilindungi. Mimi juga memiliki karakteristik tersendiri dalam darahnya. Umumnya hewan darat maupun laut memiliki darah berwarna merah. Namun, darah pada mimi berwarna biru. Pada (Tachypleus gigas) memiliki ekstrak darah kemungkinan mengandung senyawa antibakteri. Tujuan memisahkan dan mengkarakterisasi darah limulus dan menskrining hasil pemisahan darah dengan bakteri patogen. Hasil Penelitian 10 ekor mimi yaitu 165,72 ml. Setelah disentrifuse dihasilkan supernatan  90,633 ml dan  23,304 pelet. Hasil analisis fitokimia banyak dihasilkan pada supernatan terutama alkaloid, fenol, tannin, alkaloid. Berdasarkan skrining dengan bakteri patogen tidak dihasilkan zona hambat karena pengenceran terlalu kecil. Horseshoe crab or mimi lan mintuno or trim (Limulidae tribe) includes four types of extending animals (Artropoda) that inhabit the shallow waters of the brackish area and the mangrove area. Mimi is one of the protected genetic resources. Mimi also has its own characteristics in the blood. Generally land and sea animals have red blood. However, the blood on the mimi is blue. In (Tachypleus gigas) has Limulus Amebosit Lysate blood extract (LAL). The purpose of separating and characterizing blood limulus and screening the results of blood separation with pathogenic bacteria. Research result of 10 tail Limulus sp that is 165,72 ml. After centrifugation, the supernatant produced 90,633 ml and 23,304 pellets. The result of phytochemical analysis is mostly produced on supernatant especially alkaloid, phenol, tannin, alkaloid. Screening with pathogenic bacteria does not result in inhibit zone because dilution is too small.

oai:ojs.ejournal.undip.ac.id:article/48020 2023-05-13T09:22:51Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/48020 2023-05-13T09:22:51Z Buletin Oseanografi Marina Vol 12, No 1 (2023): Buletin Oseanografi Marina; 43-53 Ridlo, Ali; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Sedjati, Sri; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Supriyantini, Endang; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Zanjabila, Dinda Ayuniar; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2023-02-04 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/48020 Bioplastik; Karagenan; Alginat; Kalsium Klorida; Crosslink id Material biopolimer tunggal seperti alginat dan karagenan tidak memiliki sifat fisiko-kimia dan mekanik yang mencukupi untuk digunakan sebagai produk spesifik seperti bioplastik, sehingga diperlukan kombinasi agar diperoleh hidrogel yang lebih kuat dan tahan air. Ion Ca2+ berperan sebagai crosslinker polimer bermuatan negative (alginat dan karagenan) serta meningkatkan struktur jaringan, sifat reologi dan hidrofobisitasnya, dengan cara berikatan silang dengan gugus karboksil alginat daan gugus sulfat karagenaan. Penelitian ini bertujuan untuk mengetahui pengaruh perendaman dalam larutan CaCl2 terhadap karakteristik (ketebalan, keburaman, ketahanan air, biodegradabilitas, kuat tarik dan elongasi) bioplastik alginat-karagenan-gliserol. Alginat diperoleh dari ekstraksi Sargassum sp., sedangkan karagenan diperoleh dari ekstraksi rumput laut K. alvarezii yang berasal dari Jepara, Jawa Tengah. Bioplastik dibuat dengan cara mencampur 1,5 g karagenan dan 0,5 g alginat dalam 146 mL akuades pada suhu 90℃ selama 45 menit, lalu ditambahkan gliserol 2 mL  pada suhu 70℃ dan dihomogenkan selama 15 menit, kemudian dicetak pada cetakan gelas dan dikeringkan dalam oven pada suhu 50℃ selama 18 jam. Setelah itu bioplastik dilepas dari cetakannya dan direndam dalam larutan CaCl2 (1%; 2%; 3% dan 4%) selama 5 menit lalu dikeringkan pada suhu ruang. Hasil penelitian menunjukkan bahwa perendaman dalam larutan CaCl2 meningkatkan secara signifikan (p < 0,05) kuat tarik, ketahanan air, dan opacity dan menurunkan ketebalan, elongasi, dan biodegradabilitas bioplastik alginat-karagenan-gliserol. Ketebalan dan kuat tarik bioplastik alginat-karagenan-gliserol yang dihasilkan telah memenuhi Japanese Industrial Standard.Single biopolymer materials such as alginate and carrageenan do not have sufficient physico-chemical and mechanical properties to be used as specific products such as bioplastics, so a combination is needed to obtain stronger and water-resistant hydrogels. The Ca2+ ion acts as a crosslinker for negatively charged polymers (alginate and carrageenan) and improves the network structure, rheological properties and hydrophobicity, by cross-linking with the carboxyl group of alginate and the sulfate group of carrageenan. This study aims to determine the effect of immersion in CaCl2 solution on the characteristics (thickness, opacity, water resistance, biodegradability, tensile strength and elongation at break) of alginate-carrageenan-glycerol bioplastic. Alginate was obtained from the extraction of Sargassum sp., while carrageenan was obtained from the extraction of K. alvarezii seaweed from Jepara, Central Java. Bioplastics were made by mixing 1.5 g of carrageenan and 0.5 g of alginate in 146 mL of distilled water at 90℃ for 45 minutes, then adding 2 mL of glycerol at 70℃ and homogenized for 15 minutes, then molded on a glass mold and dried in the oven at 50℃ for 18 hours. after that, the bioplastic was removed from the mold and immersed in a solution of CaCl2 (1%; 2%; 3% and 4%) for 5 minutes and then dried at room temperature. The results showed that immersion in CaCl2 solution significantly increased (p < 0.05) tensile strength, water resistance, and opacity and decreased thickness, elongation, and biodegradability of alginate-carrageenan-glycerol bioplastics. The thickness and tensile strength of the alginate-carrageenan-glycerol bioplastic produced complies with the Japanese Industrial Standard.

oai:ojs.ejournal.undip.ac.id:article/6927 2014-05-20T05:51:09Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6927 2014-05-20T05:51:09Z Buletin Oseanografi Marina Vol 2, No 1 (2013): Buletin Oseanografi Marina; 51-57 Supriyantini, Endang; Jurusan Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2013-01-20 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6927 en Skeletonema costatum merupakan salah satu jenis pakan alami yang mempunyai peranan penting dalam pembenihan ikan, udang, kerang-kerangan,dan kepiting. S. costatum mampu beradaptasi pada berbagai salinitas. Sehingga mampu hidup di laut, pantai dan muara sungai. Tujuan dari penelitian ini adalah untuk mengetahui kandungan nutrisi S. costatum yang dikultur pada salinitas yang berbeda dalam skala massal.  Penelitian dilaksanakan di Balai Besar Pengembangan Budi daya Air Payau (BBPBAP) Jepara. Perlakuan dalam penelitian ini menggunakan 4 salinitas yang berbeda, yaitu  15 ppt, 20 ppt, 25 ppt dan 30 ppt dengan masing-masing 3 ulangan. S. costatum dipanen setelah mencapai fase eksponensial dengan menggunakan plankton net ukuran 10 µm. Hasil penelitian menunjukkan pada salinitas 15 ppt diperoleh kadar protein tertinggi yaitu 22,29 % dan kadar lemak kasar tertinggi pada salinitas 25 ppt yaitu 2,09 %. Serat kasar tertinggi pada salinitas 25 ppt yaitu 1,41 %. Kadar air tertinggi pada salinitas 25 ppt yaitu 12,68 %. Kadar abu tertinggi pada salinitas 20 ppt yaitu 61,14 %. Bahan Ekstrak Tanpa unsur N (BETN) tertinggi pada salinitas 30 ppt yaitu 14,65 %. Kata Kunci  :Skeletonema costatum, salinitas, kandungan nutrisi

oai:ojs.ejournal.undip.ac.id:article/63712 2026-02-11T04:57:56Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/63712 2026-02-11T04:57:56Z Buletin Oseanografi Marina Vol 15, No 1 (2026): Buletin Oseanografi Marina; 134-142 Hasanah, Alfiatun; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Zainuri, Muhammad; Departemen Oceanografi Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Yulianto, Bambang; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2026-02-25 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/63712 Pesisir Tegal Timur; Nitrat; Fosfat; Pasang Surut; Variabilitas Musim id Kawasan pesisir Tegal Timur memiliki peran krusial dalam ekologi pesisir dengan kompleksitasnya serta beragam aktivitas manusia yang menghasilkan limbah dan meningkatkan bahan organik. Di wilayah muara dan pesisir, siklus pasang surut dan variabilitas musim memengaruhi konsentrasi nitrat dan fosfat, yang berasal dari dekomposisi bahan organik serta aktivitas antropogenik. Penelitian ini bertujuan menganalisis dampak siklus pasang surut dan perbedaan musim terhadap konsentrasi nitrat dan fosfat di perairan Tegal Timur. Penelitian dilakukan di pesisir Kecamatan Tegal Timur, Kota Tegal, Jawa Tengah, dengan pengambilan sampel air di 7 titik (3 titik di muara dan 4 titik di laut). Data primer berupa konsentrasi nitrat dan fosfat, sedangkan data sekunder berasal dari pasang surut BIG (Badan Informasi Geospasial). Pengambilan sampel dilakukan pada Maret dan Agustus saat pasang tertinggi dan surut terendah. Hasil studi menunjukkan bahwa pada bulan Maret, konsentrasi nitrat tertinggi ditemukan saat pasang tertinggi, sedangkan pada bulan Agustus saat surut terendah. Pola berlawanan terjadi pada fosfat, dengan konsentrasi lebih tinggi saat surut pada bulan Maret dan lebih tinggi saat pasang tertinggi pada bulan Agustus. Musim penghujan menunjukkan konsentrasi nitrat dan fosfat lebih tinggi dibanding musim kemarau. Studi ini mengonfirmasi bahwa siklus pasang surut dan perbedaan musim memengaruhi distribusi nitrat dan fosfat di perairan Tegal Timur.  The coastal area of East Tegal plays a crucial role in coastal ecology due to its complexity and diverse human activities, which contribute to waste generation and increased organic matter input. In estuarine and coastal regions, tidal cycles and seasonal variability influence nitrate and phosphate concentrations, which originate from the decomposition of organic matter and anthropogenic activities. This study aims to analyze the impact of tidal cycles and seasonal differences on nitrate and phosphate concentrations in the waters of East Tegal. The study was conducted in the coastal area of East Tegal District, Tegal City, Central Java, with water sampling at 7 locations (3 in the estuary and 4 offshore). Primary data consist of nitrate and phosphate concentrations, while secondary data on tidal patterns were obtained from the Geospatial Information Agency (BIG). Sampling was carried out in March and August during the highest high tide and the lowest low tide conditions. The results indicate that in March, the highest nitrate concentration was observed during the highest high tide, whereas in August, it was found during the lowest low tide. An inverse pattern was observed for phosphate, with higher concentrations during low tide in March and during the highest high tide in August. The rainy season exhibited higher nitrate and phosphate concentrations compared to the dry season. This study confirms that tidal cycles and seasonal variations significantly influence the spatial distribution of nitrate and phosphate in the waters of East Tegal.

oai:ojs.ejournal.undip.ac.id:article/25639 2020-04-17T12:08:49Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/25639 2020-04-17T12:08:49Z Buletin Oseanografi Marina Vol 8, No 2 (2019): Buletin Oseanografi Marina; 96-102 Redjeki, Sri; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Putri, Riska Novianti; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Santoso, Adi; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Sunaryo, Sunaryo; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Sedjati, Sri; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2019-10-04 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/25639 Komposisi; Larva Ikan; Padang Lamun; Perairan Prawean id Larva Ikan (ichtyoplankton) merupakan tahapan awal dari daur hidup ikan dimulai dari perkembangan telur, larva dan juvenil, memiliki tingkat mortalitas tinggi dan peka terhadap perubahan lingkungan, predator, dan kesediaan makanan. Fungsi ekologis padang lamun sebagai daerah asuhan dan tempat berlindung bagi semua jenis organisme laut kecil, salah satunya larva ikan. Kerapatan atau tutupan padang lamun juga sebagai salah satu faktor pendukung melimpahnya organisme dan kekayaan di laut. Tujuan Penelitian ini untuk mengetahui kelimpahan dan distribusi larva ikan yang terdapat pada ekosistem padang lamun, serta mengetahui hubungan kelimpahan larva ikan dengan tutupan padang lamun di Perairan Prawean Bandengan, Jepara. Metode penelitian ini adalah metode deskriptif dengan penentuan lokasi sampling menggunakan  purposive sampling methode. Lokasi penelitian pada 3 stasiun dengan pembagian kerapatan lamun yang berbeda (I = Padat ; II = Sedang ; III = Jarang) dan dilakukan sebanyak 3 kali pengulangan sampling di masing-masing lokasi. Pengambilan sampel larva ikan dilakukan dengan menggunakan larva net  (P = 0,9 m ; L : 0,6m) dengan ukuran mata jaring 800 µm. Hasil penelitian ini ditemukan larva ikan sebanyak 5 famili yaitu Nemipteridae, Gerreidae, Gobiidae, Labridae, dan Mullidae. Famili larva ikan yang paling sering ditemukan adalah Nemipteridae. Rata-rata kelimpahan famili larva ikan pada Stasiun I sebesar 0,419 ind/m3, Stasiun II sebesar 0,205 ind/m3, dan pada stasiun III sebesar 0,069 ind/m3. Nilai rata - rata indeks keanekaragaman termasuk dalam kategori rendah sedang (0,65–1,37), indeks keseragaman larva ikan termasuk dalam kategori rendah-tinggi (0,33-0,65) indeks dominasi larva ikan menunjukan ada yang mendominasi pada tiga stasiun (0,28–0,30) dan indeks sebaran morisita yang dilakukan menunjukan bahwa sebaran larva ikan pada tiga stasiun merata. Fish larvae (ichtyoplankton) are the initial stages of the fish's life cycle starting from the development of eggs, larvae and juveniles, which have a high mortality rate and are sensitive to environmental changes, predators, and food availability. The ecological function of seagrass beds as nurseries and shelter for all types of small marine organisms, one of which is fish larvae. The density or cover of seagrass beds is also one of the supporting factors for the abundance of organisms and wealth in the sea. The purpose of this study was to determine the abundance and distribution of fish larvae found in the seagrass ecosystems, and to determine the relationship of abundance of fish larvae with cover seagrass beds in the waters of Prawean Bandengan, Jepara. This research method is a descriptive method by determining the sampling location using purposive sampling method. The research location was in 3 stations with a different distribution of seagrass density (I = Dense; II = Medium; III = Rare) and carried out 3 times repetition of sampling at each location. Sampling of fish larvae was carried out using larvae net (P = 0,9 m; L: 0,6m) with a mesh size of 800 μm. The results of this reasearch, found fish larvae of 5 families, namely Nemipteridae, Gerreidae, Gobiidae, Labridae, and Mullidae. The most common family of fish larvae was Nemipteridae. The average abundance of fish larvae at Station I was 0,419 ind/m3, Station II was 0,205 ind/m3, and at Station III was 0,069 ind/m3. The average diversity index was included in the low category (0,65 – 1,37), the uniformity index of fish larvae was included in the low-high category (0,33 – 0,65) the fish larvae dominance index shows that there are dominating at three stations (0,28 – 0,30) and the distribution index of distribution (morisita) conducted showed that the distribution of fish larvae at three stations was evenly distributed.

oai:ojs.ejournal.undip.ac.id:article/6953 2014-05-22T08:54:42Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6953 2014-05-22T08:54:42Z Buletin Oseanografi Marina Vol 2, No 3 (2013): Buletin Oseanografi Marina; 71-80 Panalaran, Satriyo; Jurusan Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Prasetyawan, Indra Budi; Jurusan Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2013-07-22 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6953 en Panas yang masuk ke badan air dapat melalui interaksi antara atmosfer dan air, ataupun dapat melalui kegiatan yang dilakukan manusia. Panas yang bersumber dari kegiatan manusia disebut juga panas artificial, yang dalam hal ini bersumber dari outlet power plant. Proses penyebaran suhu di perairan dapat melalui tiga proses yaitu secara radiasi, adveksi, dan difusi. Proses adveksi berpengaruh besar terhadap proses-proses transport di badan air. Pengambilan data dilakukan di Teluk Benete pada tanggal 1 hingga 15 April 2011. Data primer yang digunakan pada penelitian ini adalah data arus perairan dan data suhu perairan. Sedangkan data sekunder yang digunakan adalah data pasang surut, peta bathimetri, data angin dan cuaca. Hasil penelitian menunjukkan jenis pasang surut di Teluk Benete adalah campuran condong ke harian ganda. Karakteristik arus di Teluk Benete di lapisan dasar cenderung bergerak ke arah barat laut dan tenggara dengan kecepatan 0,6 – 17,4 cm/detik. Arus di lapisan menengah cenderung bergerak ke semua arah dengan kecepatan 0,2 – 14,2 cm/detik. Arus di lapisan permukaan cenderung bererak ke semua arah dengan kecepatan 0,15 – 21,7 cm/detik. Dari pemisahan kecepatan arus ke dalam komponen arus pasut dan arus residu, maka didapatkan bahwa arus di Teluk Benete lebih didominansi oleh arus residu. Hasil pengukuran suhu air di dekat outlet menunjukkan suhu di kolom air berkisar antara 28,0 – 28,8 °C. Sedangkan suhu pada stasiun kontrol suhu berkisar antara 27,7 – 28,9 °C. Hasil simulasi model penyebaran termal menunjukkan bahwa plume termal dari outlet air pendingin power plant tidak memiliki jangkauan yang luas, yaitu ditunjukkan pada jarak 50 meter dari outlet, suhu perairan hanya memiliki rentang kurang dari 0,5 °C. Hal ini menunjukkan bahwa pada jarak ini suhu air telah serupa dengan suhu lingkungan perairan di sekitarnya. Kata kunci: plume termal, arus, model transport, Teluk Benete

oai:ojs.ejournal.undip.ac.id:article/31051 2021-02-01T08:06:35Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/31051 2021-02-01T08:06:35Z Buletin Oseanografi Marina Vol 10, No 1 (2021): Buletin Oseanografi Marina; 61-66 Rosema, Rima; Departemen Ilmu Kelautan, FakultasPerikanan dan Ilmu Kelautan, Universitas Diponegoro Supriyantini, Endang; Departemen Ilmu Kelautan, FakultasPerikanan dan Ilmu Kelautan, Universitas Diponegoro Sedjati, Sri; Departemen Ilmu Kelautan, FakultasPerikanan dan Ilmu Kelautan, Universitas Diponegoro 2021-02-01 10:08:09 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/31051 Kitosan; Logam Berat; Timbal; Pb; Adsorpsi id Kitosan telah banyak dimanfaatkan dalam berbagai bidang kehidupan manusia, salah satunya dijadikan sebagai adsorben logam berat. Logam berat timbal (Pb) merupakan polutan yang mencemari perairan dan bersifat toksik. Penelitian ini bertujuan untuk menguji kapasitas dan daya adsorpsi larutan kitosan komersial dan non komersial (produk sendiri) dalam konsentrasi berbeda terhadap logam Pb. Metode penelitian yang digunakan yaitu eksperimental laboratoris dengan rancangan percobaan Faktorial 2 Aras dengan menggunakan 1 kontrol (0 %) dan 4 perlakuan yaitu konsentrasi 0,5% (A), 1% (B), 1,5% (C) dan 2% (D). Hasil penelitian menunjukkan bahwa terdapat interaksi antara sumber kitosan dengan konsentrasi kitosan untuk menurunkan kandungan Pb. Dosis terbaik yang mampu menurunkan logam Pb untuk kitosan komersial yaitu pada konsentrasi 1% dengan kapasitas penyerapan sebesar 0,228 mg/g dan kemampuan penyerapan sebesar 87,870 %. Sedangkan kitosan non komersial mampu menurunkan logam Pb pada konsentrasi 1,5% dengan kapasitas penyerapan sebesar 0,143 mg/g dan kemampuan penyerapan sebesar 82,660 %.  Chitosan has been widely used in various fields of human life, one of which is used as a heavy metal adsorbent. Lead heavy metals (Pb) is a pollutants that pollutes the waters and is toxic. This study aims to examine the capacity and adsorption capacity of commercial and non-commercial chitosan  solutions  (own products) in  different concentrations of Pb metal. The research method used is an experimental laboratories with chitosan from the isolation itself and commercial chitosan. The research method used is an experimental laboratory with 2 Aras factorial experimental design using 1 control  (0%) and 4 treatments namely a concentrations of 0.5% (A), 1% (B), 1.5% (C) and 2% (D). The results showed that there was an interaction between chitosan sources and chitosan concentration to reduce Pb content. The best dose that can reduce Pb metal for commercial chitosan is at a concentration of 1% with an adsorption capacity of 0.228 mg/g, and an adsorption ability of 87.870 %. while non-commercial chitosan can reduce Pb metal at a concentration of 1.5 % with an adsorption capacity of 0.143 mg/g and an adsorption ability of 82.660 %.  

oai:ojs.ejournal.undip.ac.id:article/60304 2024-07-04T18:54:21Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/60304 2024-07-04T18:54:21Z Buletin Oseanografi Marina Vol 13, No 2 (2024): Buletin Oseanografi Marina; 250-260 Zandika, Rendy; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Ismunarti, Dwi Haryo; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Kunarso, Kunarso; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Hatmaja, Rahaden Bagas; Pusat Riset Iklim dan Atmosfer, Badan Riset dan Inovasi Nasional Ayubi, M. Albab Al; Dinas Kelautan dan Perikanan Provinsi Kepulauan Bangka Beltung 2024-06-05 22:58:08 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/60304 Klorofil-a; WPPNRI 711; Thermal front id memiliki potensi sumber daya kelautan yang besar yang berada pada kawasan Selat Karimata, Laut Natuna, dan Laut Natuna Utara. Penelitian mengenai variabilitas thermal front dan keterkaitan dengan klorofil-a di WPPNRI 711 menjadi informasi yang sangat penting untuk memberikan wawasan yang lebih dalam tentang bagaimana perubahan suhu dan produktivitas biologis saling mempengaruhi. Tujuan penelitian ini adalah untuk mengetahui variabilitas  thermal front dan kaitannya dengan klorofil-a di WPPNRI 711. Penelitian ini menggunakan data SPL, klorofil-a, angin, curah hujan dari website marine.copernicus.eu. Data diolah mengggunakan MATLAB sehingga menghasilkan data, peta, dan grafik dari SPL, thermal front, klorofil-a, curah hujan dan angin dan dianalisis dengan mengkaitkan dengan penelitian sebelumnya menggunakan metode kuantiatif sehingga mendapatkan hasil yang obyektif. Hasil penelitian menunjukkan area thermal front di WPPNRI 711 mencapai nilai tertinggi pada musim barat dengan luas sebesar 386.263 km2 dan area thermal front mencapai nilai terendah pada musim timur dengan luas sebesar 264.058 km2. Keterkaitan klorofil-a dengan thermal front menunjukkan konsentrasi klorofil-a pada daerah thermal front di Pesisir Pulau Sumatera dan Laut Natuna lebih tinggi dengan rata-rata berturut-turut sebesar 3,49 mg/m3 dan 0,16 mg/m3 dibandingkan dengan rata-rata klorofil-a di keseluruhan area Pesisir Pulau Sumatera dan Laut Natuna dengan rata-rata berturut-turut sebesar 2,68 mg/m3 dan 0,14 mg/m3.  Wilayah Pengelolaan Perikanan Negara Republik Indonesia 711 (WPPNRI 711) is a region with significant potential for marine resources located in the Karimata Strait, Natuna Sea, and North Natuna Sea. Research on the variability of thermal fronts and their connection with chlorophyll-a in WPPNRI 711 can provide additional information and deeper insights into how temperature changes and biological productivity mutually influence each other. The aim of this research is to understand the variability of thermal fronts and their correlation with chlorophyll-a in WPPNRI 711. The study utilizes secondary data on Sea Surface Temperature (SPL), chlorophyll-a, wind, and rainfall. The data is processed using MATLAB to generate SPL, thermal front, chlorophyll-a, rainfall, and wind data, as well as maps and graphs. The analysis is conducted by associating the results with previous research using quantitative methods to obtain objective findings.The research findings indicate that the thermal front area in WPPNRI 711 reaches its highest value during the west monsoon season, covering an area of 386,263 km², while the thermal front area reaches its lowest value during the east monsoon season, covering an area of 264,058 km². The correlation between chlorophyll-a and thermal fronts shows that chlorophyll-a concentration in the thermal front areas in the Coastal areas of Sumatra Island and Natuna Sea is higher, with average values of 3.49 mg/m3 and 0.16 mg/m3 respectively, compared to the overall average chlorophyll-a in the Coastal areas of Sumatra Island and Natuna Sea, with average values of 2.68 mg/m3 and 0.14 mg/m3 respectively.

oai:ojs.ejournal.undip.ac.id:article/11221 2016-06-08T00:03:02Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/11221 2016-06-08T00:03:02Z Buletin Oseanografi Marina Vol 1, No 2 (2012): Buletin Oseanografi Marina; 49-64 A’in, Churun; Fakultas Perikanan dan Ilmu Kelautan UNDIP 2012-01-03 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/11221 en Lahan basah merupakan salah satu daerah vital di wilayah pesisir. Dipandang dari segi ekologis kawasan ini menyimpan beragam fungsi diantaranya: sebagai buffer area, konversi dan pensuplai nutrien, menyerap dan mereduksi banjir, serta habitat bagi beberapa spesies hewan pesisir. Untuk mendukung usaha pengembangan kawasan lahan basah sebagai suatu sumberdaya alamiah, maka diperlukan suatu survai tanah (lahan) ataupun pemetaan kemampuan tanah. Penelitian ini bertujuan untuk mengetahui profil fisik dan potensi hara sedimen pada lahan basah di desa Tanggul Tlare dan sekaligus mengetahui hubungan kualitas sedimen dan sediaan hara. Metode yang digunakan dalam penelitian ini adalah “Sample Survey Method” dan bersifat deskriptif guna memberikan gambaran mengenai situasi dan kondisi secara lokal. Penelitian ini dilaksanakan pada bulan Juli – Agustus 2007 di desa Tanggul Tlarre, kelurahan Kedung, kecamatan Tahunan, kabupaten Jepara. Berdasarkan sifat dan karakteristiknya lahan basah di desa Tanggul Tlare digolongkan sebagai lahan basah tipe rawa pasang surut. Spesifikasi yang dimiliki lahan basah tersebut diantaranya adalah adanya perbedaan substrat dasar yang menyebabkan beberapa pola zonasi; zona I didominasi pasir, zona II didominasi lempung, zona III didominasi lumpur; kepayauan akan semakin berkurang untuk setiap peningkatan zona; bahan organik (BOT) yang tinggi. Dari hasil penelitian potensi hara yang dimiliki lahan basah tersebut dikategorikan dalam taraf rendah (nitrogen total dan fosfat).  Kualitas sedimen berpengaruh secara nyata terhadap potensi hara dengan indeks korelasi yang erat, kecuali BOT dan fosfat (thit = 1,817 < ttab=2,633; r = 0,491) yaitu liat berpengaruh terhadap sediaan fosfat (thit = 5,800 > ttab=2,633; r = 0,878), liat berpengaruh terhadap sediaan nitrogen (thit = 6,169 > ttab=2,633; r = 0,890), BOT berpengaruh terhadap N (thit = 7,251 > ttab=2,633; r = 0,917),  dan  BOT berpengaruh terhadap C (thit = 38,820 > ttab=2,633; r = 0,997). Disamping itu nilai kualitas sedimen dapat dijadikan sebagai penduga sediaan hara sedimen (Y=a + bX). Kata Kunci : Lahan Basah, Kualitas Sedimen, Potensi Hara

oai:ojs.ejournal.undip.ac.id:article/40201 2022-05-20T01:15:04Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/40201 2022-05-20T01:15:04Z Buletin Oseanografi Marina Vol 11, No 1 (2022): Buletin Oseanografi Marina; 11-18 Haban, Muhamad Hafiz Maulavi; Department of Oceanography, Faculty of Fisheries and Marine Science, Universitas Diponegoro Kunarso, Kunarso; Department of Oceanography, Faculty of Fisheries and Marine Science, Universitas Diponegoro Prayogo, Teguh; National Institute of Aeronautics and Space of Indonesian Wirasatriya, Anindya; Department of Oceanography, Faculty of Fisheries and Marine Science, Universitas Diponegoro 2022-01-30 16:19:34 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/40201 Chlorophyll-a; Sentinel-3 OLCI; C2RCC; Semarang Bay en Chlorophyll-a is an indicator for the fertility of waters. The oceanographic conditions make the distribution of chlorophyll-a in waters always changes every season, both spatial and temporal. The aim of this research is to determine the spatial and temporal distribution of chlorophyll-a in Semarang Bay using Sentinel-3 OLCI imagery. Sentinel-3 OLCI imagery has a resolution of 300 m x 300 m, based on the spatial resolution generated by Sentinel-3 OLCI imagery to further examine the spatial distribution of chlorophyll-a in Semarang Bay with better spatial resolution. This research also used wind, current, temperature and salinity data from the Reanalysis Model which were processed using the SNAP program with C2RCC method. It is found that the distribution of chlorophyll-a in the Semarang Bay showed a varied pattern spatially and temporally. Temporally, the highest chlorophyll-a concentration occurred in January and the lowest was in June. Spatially, chlorophyll-a on the coast of Semarang and Demak is higher than that on the coast of Kendal in the west season, but entering the east season the highest chlorophyll-a is on the Kendal coast than on the coast of Semarang and Demak. Chlorophyll-a distribution in Semarang Bay mostly influenced by river run off and wind.

oai:ojs.ejournal.undip.ac.id:article/54195 2026-02-11T04:49:13Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/54195 2026-02-11T04:49:13Z Buletin Oseanografi Marina Vol 14, No 2 (2025): Buletin Oseanografi Marina; 181-189 Arrahmah, Syifa; Departemen Oseanografi Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Masluka, Lilik; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Nugroho, Denny; Departemen Oseanografi Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2025-06-10 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/54195 Bahan organik; BOD5; COD; Sungai Banger id Perairan Sungai Banger memiliki beragam kegiatan antropogenik seperti industri batik, perikanan, dan pertanian. Hal ini dapat memberikan kontribusi terhadap masuknya bahan organik. Bahan organik yang terdapat dalam perairan dapat memberikan gambaran tingkat pencemaran. Bahan organik di perairan dapat diprediksi melalui pengukuran parameter seperti BOD5 (Biological Oxygen Demand), COD (Chemical Oxygen Demand) dan kandungan karbon organik total (KOT). Penelitian ini bertujuan untuk mengetahui perbedaan nilai bahan organik di perairan melalui pengukuran parameter karbon organik total (KOT), parameter BOD5 dan COD. Data parameter kualitas air sebagai data pendukung yang diukur secara in situ meliputi salinitas, suhu, pH, kecerahan dan oksigen terlarut (DO). Hasil pengamatan menunjukkan nilai KOT terukur berkisar 5,40 – 9, 60 mg/l, nilai BOD5 terukur berkisar2,82 – 5,076 mg/l dan nilai COD terukur berkisar 28,85 – 41,87 mg/l. Analisis komponen utama memperlihatkan bahwa keberadaan BOD dan COD dipengaruhi oleh suhu, sementara KOT lebih banyak oleh pH. Selain itu KOT memiliki hubungan negatif kuat terhadap salinitas, kecerahan dan oksigen terlarut (DO).  The waters of the Banger River have a variety of anthropogenic activities such as the batik industry, fisheries, and agriculture. This can contribute to the influx of organic matter. Organic matter contained in waters can give an idea of the level of pollution. Organic matter in waters can be predicted through the measurement of parameters such as BOD5 (Biological Oxygen Demand), COD (Chemical Oxygen Demand) and total organic carbon content (KOT). This study aims to determine the difference in the value of organic matter in waters through the measurement of total organic carbon parameters, BOD5 and COD parameters. Water quality parameter data as supporting data measured in situ include salinity, temperature, pH, brightness and dissolved oxygen (DO). The results showed that the measured TOC values ranged from 5.40 - 9, 60 mg/l, measured BOD5 values ranged from 2.82 - 5.076 mg/l and measured COD values ranged from 28.85 - 41.87 mg/l. Principal component analysis showed that the presence of BOD and COD was influenced by temperature, while KOT was more by pH. In addition, KOT had a strong negative relationship with salinity, brightness and dissolved oxygen (DO).

oai:ojs.ejournal.undip.ac.id:article/16557 2020-04-17T12:04:39Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/16557 2020-04-17T12:04:39Z Buletin Oseanografi Marina Vol 6, No 2 (2017): Buletin Oseanografi Marina; 82-87 Kushartono, Edi Wibowo; Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Ario, Raden; Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Pramesti, Rini; Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro S, Tiurma; Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Satriadi, Alfi; Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2017-11-18 00:38:53 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/16557 Sargassum sp,; Green turtle; Chelonia mydas; Hatchling; tukik; rumput laut en Tingkat keberhasilan hidup tukik menuju dewasa dapat ditentukan dengan pemberian pakan. Rumput laut sebagai pakan tukik telah diujikan pada tukik Penyu Hijau (Chelonia mydas). Penelitian ini bertujuanuntuk mengetahui pengaruh pemberian rumput laut sebagai pakan yang berbeda terhadap pertumbuhan tukik Penyu Hijau (C. mydas) selama masa pemeliharaan 4 minggu. Penelitian ini menggunakan Metode eksperimen laboratorium dengan materi tukik usia 4 bulan. Hasil penelitian menunjukan bahwa tukik yang diberi kombinasi pakan Udang ebi dan Rumput laut Sargassum sp. menunjukkan rerata laju pertumbuhan1,56 ± 0,11 gram lebih besar dari tukik yang diberi kombinasi Pelet dan Rumput laut sebesar 1,47 ± 0,14 gram dan kontrol 0,51 ± 0,57 gram. Perlakuan kombinasi tambahan rumput laut terhadap pakan tukik menunjukan hasil yang signifikan (P 0,05) pada laju pertumbuhan. The existence of turtles on the island of Bangka already slowly becomes extinct as the result of increasing mining activity. Feeding can for the survival of adulthood. The purpose of this study is to determine the affect of combinations of different feed on the growth of Green Turtle (Chelonia mydas) period of 4 weeks. This study use laboratory experimental method with the material used was the green turtle hatchlings around the age of 4 months and was conducted in Bangka Beach, Bangka. Result from the study showed that were given a combination of shrimp and Sargassum sp. show that specific growth rate on average 1,56 ± 0,11 gram bigger than that were given a combination of pellets and Sargassum sp. namely 1,47 ± 0,14 gram and 0,51 ± 0,57 gram control. Specific growth rate feeding treated with different combinations shows 17,17 F count > F table 0,05 and 0,01. It is claimed that the two highly significant treatment on a significant 0,05 and 0,01. 

oai:ojs.ejournal.undip.ac.id:article/47685 2023-01-25T06:05:53Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/47685 2023-01-25T06:05:53Z Buletin Oseanografi Marina Vol 11, No 3 (2022): Buletin Oseanografi Marina; 347-357 Antara, Kadek Lila; Magister Budidaya Perikanan, Universitas Brawijaya Fadjar, Muhammad; Magister Budidaya Perikanan, Universitas Brawijaya Setijawati, Dwi; Magister Budidaya Perikanan, Universitas Brawijaya 2022-10-01 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/47685 Caulerpa lentillifera; Laju pertumbuhan; Budidaya terintegrasi id Caulerpa sp ditemukan di beberapa perairan Pesisir Indonesia dikenal sebagai anggur laut dengan rasa sangat mirip dengan telur salmon, tetapi segar dan harum, tanpa bau amis telur ikan. Caulerpa lentillifera merupakan sumber nutrisi yang menjanjikan untuk masa depan karena manfaat dan komposisinya untuk konsumsi manusia. Budidaya diyakini dapat meningkatkan ketersediaan produk baik secara kuantitas maupun kuantitas, tanpa mengandalkan eksploitasi di alam. Hal menarik dari penelitian ini adalah budidaya Caulerpa lentifera dilakukan bersama budidaya Haliotis squamata. Penelitian bertujuan mengetahui efektifitas penggunaan air limbah budidaya abalon terhadap pertumbuhan Caulerpa lentillifera dan penggunaan pupuk pada media air dalam meningkatkan hasil produksi. Penelitian menggunakan metode eksperimental dengan Rancangan Acak Lengkap dengan perlakuan. Parameter pertumbuhan terdiri dari bobot mutlak, jumlah ramili, dan kandungan klorofil. Budidaya Caulerpa lentillifera terintegrasi dengan Haliotis squamata menunjukkan efektifitas penggunaan air baik dari segi kuantitas maupun kualitas dalam budidaya yang terintegrasi. Analisis pertumbuhan dengan parameter laju pertumbuhan, jumlah ramili, dan kandungan klorifil menunjukkan peningkatan produksi Caulerpa lentillifera dapat dilaksanakan dengan penambahan pupuk, hal ini terbukti dapat memacu pertumbuhan, meningkatkan jumlah ramili, dan meningkatkan kandungan klorofil Caulerpa lentillifera. Pemupukan dengan proporsi N : P sebesar 16 : 4 ppm setiap hari terbukti dapat memacu peningkatan bobot mutlak, proporsi assimilator, proporsi assimilator layak jual. Caulerpa sp found in several coastal waters of Indonesia is known as sea grape with a taste very similar to salmon eggs, but fresh and fragrant, without the fishy smell of fish eggs. Caulerpa lentillifera is a promising source of nutrition for the future because of its benefits and composition for human consumption. Cultivation is believed to increase the availability of products both in quantity and quantity, without relying on exploitation in nature. The interesting thing about this research is that the cultivation of Caulerpa lentifera is carried out together with the cultivation of Haliotis squamata. This study aims to determine the effectiveness of the use of abalone cultivation wastewater on the growth of Caulerpa lentillifera and the use of fertilizers in water media in increasing production yields. The study used an experimental method with a completely randomized design with treatment. Growth parameters consisted of absolute weight, number of ramili, and chlorophyll index. The integrated cultivation of Caulerpa lentillifera with Haliotis squamata shows the effectiveness of water use both in terms of quantity and quality in integrated cultivation. Growth analysis with parameters of growth rate, number of ramili, and chlorophyll index showed an increase in Caulerpa lentillifera production could be carried out with the addition of fertilizer, this was proven to stimulate growth, increase the number of ramie, and increase the chlorophyll content of Caulerpa lentillifera. Fertilization with N : P proportion of 16 : 4 ppm every day was proven to increase absolute weight, proportion of assimilator, proportion of assimilator worth selling.

oai:ojs.ejournal.undip.ac.id:article/6917 2014-05-20T03:34:08Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6917 2014-05-20T03:34:08Z Buletin Oseanografi Marina Vol 1, No 5 (2012): Buletin Oseanografi Marina; 53-62 Satriadi, Alfi; Program Studi Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2012-10-10 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6917 en Kota Semarang sebagai kota pantai mempunyai arti yang strategis baik. -. Pertumbuhan penduduk yang pesat dan meningkatnya kebutuhan hidup membutuhkan - tanah yang strategis dan  murah. -. Salah satu usaha -untuk memenuhi kebutuhan lahan pemukiman baru adalah dengan melakukan reklamasi pantai. Tujuan penelitian ini - untuk mendapatkan informasi mengenai kedalaman dan kelerengan perairan Pantai Marina serta jenis dan sebaran horisontal sedimen -. Metode penelitian yang digunakan adalah metode studi kasus. - Waktu penelitian ini dilakukan sejak tanggal 7 - Juli - hingga 24 Juli 2010 yang meliputi kegiatan survei lokasi, pemeruman dan pengambilan sampel. Selanjutnya dilakukan analisis sedimen dan pengolahan data batimetri. Hasil penelitian menunjukkan  kedalaman perairan di daerah penelitian dari garis pantai berkisar antara 0 sampai ± 9 meter, dengan nilai kelerengan berkisar antara 0,178% sampai dengan 0,200%. Sebaran sedimen permukaan dasar laut - memiliki tiga satuan sedimen yaitu, satuan pasir (sand) dengan penyebaran seluas 28,125 % yang terletak di bagian tepi pantai terutama bagian barat , satuan pasir lanauan (silty sand) penyebaran seluas 56,250 % yang tersebar relatif dominan ke arah laut yang lebih dalam, dan satuan lanau pasiran (sandy silt) mempunyai penyebaran seluas 15,625% yang tersebar ke arah laut yang lebih dalam lagi dengan kedalaman kurang lebih 5 meter sampai dengan lebih dari 9 meter. -, -.Lokasi penelitian mempunyai nilai stasistik sedimen permukaan dasar yang relatif bervariasi antara lain nilai kepencengan (skewness) menunjukkan menceng sangat halus sampai menceng sangat kasar, nilai rata-rata (mean) relatif bervariasi antara 1,668 sampai 4,649, sortasinya terpilah jelek dan terpilah sedang, dan nilai keruncingan mempunyai rentang antara 0,093 sampai 1,330. Kata kunci : batimetri, pemeruman, sedimen dasar laut.

oai:ojs.ejournal.undip.ac.id:article/78011 2026-02-11T04:57:56Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/78011 2026-02-11T04:57:56Z Buletin Oseanografi Marina Vol 15, No 1 (2026): Buletin Oseanografi Marina; 21-32 Susilo, Ahmad Faiq Indra; Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro Zaman, Badrus; Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro Sarminingsih, Anik; Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro 2026-02-25 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/78011 Pesisir Betahwalang; Indeks Pencemaran; Rajungan; Kualitas Air Laut; Muara Sungai id Pesisir Betahwalang merupakan kawasan strategis dengan nilai ekologis tinggi sekaligus menjadi pusat pendaratan rajungan. Penetapannya sebagai kawasan konservasi rajungan melalui Keputusan Menteri Kelautan dan Perikanan Republik Indonesia Nomor 38 Tahun 2024 menegaskan pentingnya pemahaman terhadap kondisi kualitas perairan untuk mendukung keberlanjutan ekosistem laut wilayah tersebut. Penelitian ini bertujuan untuk menganalisis tingkat pencemaran menggunakan Indeks Pencemaran (IP) serta memetakan distribusinya secara spasial. Pengambilan data dilakukan pada bulan Februari 2025 tanggal 9 dan 28 di sembilan titik sampling menggunakan metode purposive sampling. Hasil pengukuran ini merepresentasikan kondisi sesaat sebagai kegiatan monitoring pada periode tersebut. Parameter fisika-kimia yang diuji seperti suhu, salinitas, pH, kecerahan, TSS, DO, BOD, amonia, fosfat, serta minyak dan lemak dianalisis secara in-situ dan laboratorium. Nilai kualitas air hasil pengukuran menunjukkan bahwa perairan pesisir Betahwalang sangat ideal sebagai habitat rajungan. Hasil IP menunjukkan variasi, dengan kondisi ditanggal 9 Februari tergolong “Tercemar Sedang” (IP rerata 5,26) dan ditanggal 28 Februari tergolong “Tercemar Ringan” (IP rerata 3,20). Distribusi spasial mengindikasikan muara sungai sebagai zona dengan tingkat pencemaran tertinggi. Hasil ini menunjukkan adanya dinamika kualitas perairan di kawasan konservasi dan menegaskan perlunya pemantauan berkelanjutan untuk menjaga keseimbangan ekologi dan mendukung pengelolaan perikanan berkelanjutan. Betahwalang Coast is a strategic area with high ecological value and serves as center for blue swimming crab fisheries. Its designation as a Blue Swimming Crab Conservation Area through the Decree of the Minister of Marine Affairs and Fisheries of the Republic of Indonesia Number 38 of 2024 emphasizes the importance of understanding of water quality to support the support marine ecosystem sustainability sustainability. This research aims to analyze pollution level using the Pollution Index (PI) and map their spatial distribution. Water sampling was carried out in February 2025, specifically on the 9th and 28th, at nine selected purposively stations. The measurement results represent the momentary conditions as monitoring activities during that period. Physicochemical parameters measured included temperature, salinity, pH, brightness, TSS, DO, BOD, ammonia, phosphate, and oil and fat, were analyzed in-situ and in the laboratory. The measurement water quality values indicate that the coastal waters of Betahwalang are highly suitable as a habitat for blue swimming crabs. The IP results showed variation, with the condition on February 9th classified as Moderately Polluted (average IP 5,26), while on February 28th it was classified as Lightly Polluted (average IP 3,20). Spatial distribution indicates the river mouth as the zone with the highest pollution level. These results demonstrate dynamic water quality changes in the conservation area and emphasize the need for continuous monitoring to maintain ecological balance and support sustainable fisheries management.

oai:ojs.ejournal.undip.ac.id:article/19486 2020-04-17T12:07:55Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/19486 2020-04-17T12:07:55Z Buletin Oseanografi Marina Vol 8, No 2 (2019): Buletin Oseanografi Marina; 87-95 Hidayah, Yovita Noor; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Supriyantini, Endang; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Suryono, Suryono; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2019-10-04 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/19486 Gracilaria gigas; Tembaga; Absorpsi; Salinitas; Cu id Limbah hasil kegiatan industri dan pertanian memberikan efek negatif pada ekosistem perairan laut, seperti logam berat Cu. mempunyai potensi toksisitas yang tinggi terhadap lingkungan perairan. Dinding sel Gracilaria gigas memiliki polisakarida yang mampu menyerap logam Cu. Tujuan penelitian ini untuk mengetahui kemampuan daya absorpsi Gracilaria gigas terhadap logam Cu dalam  media pemeliharaan dengan salinitas berbeda. . Metode yang digunakan adalah eksperimental  laboratoris, menggunakan rancangan acak lengkap (RAL) dan 3 pengulangan setiap perlakuan. Perlakuan menggunakan 5 tingkat salinitas  yaitu 10, 20, 25, 30, dan 40 ‰ dengan  pemeliharaan selama 28 hari. Hasil penelitian menunjukkan bahwa perlakuan salinitas yang berbeda tidak berpengaruh terhadap penyerapan logam berat Cu oleh Gracilaria gigas (p>0,05). Konsentrasi logam berat Cu dalam media pemeliharaan tertinggi pada perlakuan E (40 ‰) dengan rerata nilai 0,11; 0,10; 0,13; dan 0,17 ppm.  Kapasitas penyerapan logam Cu oleh Gracilaria gigas tertinggi terdapat pada hari ke 7 perlakuan A (25 ‰) dengan nilai rerata 0,007 mg/g dan efektivitas penyerapan sebesar 82,77 %. Berat basah G. gigas tertinggi terjadi pada hari ke 7 dengan rerata nilai A (25 ‰) 227,11 g; B (10 ‰) 240,55 g; C (20 ‰) 236,44 g; D (30 ‰) 221,44 g; dan E (40 ‰) 203,77 g. Berat mutlak dan laju pertumbuhan spesifik (SGR)  tertinggi terdapat pada perlakuan E (40 ‰), yaitu -34,22 g dan -0,70% per hari.  Semakin tinggi salinitas, maka pertumbuhan G. gigas akan semakin rendah sehingga akan mempengaruhi daya absorpsi logam Cu. Waste from industrial and agricultural activities has a negative effect on marine aquatic ecosystems, such as heavy metals Cu has a high potential for toxicity to the aquatic environment. The cell wall of G. gigas has polysaccharides which are able to absorb Cu metal. The purpose of this study was to determine the ability of G. gigas absorption to Cu metal in maintenance media with different salinity. . The method used is an experimental laboratory, using a completely randomized design (CRD) and 3 repetitions of each treatment. The treatment uses 5 levels of salinity namely 10, 20, 25, 30, and 40 ‰ with maintenance for 28 days. The results showed that different salinity treatments did not affect the absorption of heavy metal Cu by G.gigas (p> 0.05). The highest concentration of heavy metal Cu in the maintenance media at treatment E (40 ‰) with a mean value of 0.11; 0.10; 0.13; and 0.17 ppm. The highest absorption capacity of Cu by G. gigas was on the 7th day of treatment A (25 ‰) with an average value of 0.007 mg / g and the effectiveness of absorption of 82.77%. The highest wet weight of G. gigas occurred on the 7th day with an average value of A (25 227) 227.11 g; B (10 ‰) 240.55 g; C (20 ‰) 236.44 g; D (30 ‰) 221.44 g; and E (40 203) 203.77 g. The highest absolute weight and specific growth rate (SGR) was found in treatment E (40 ‰), which was -34.22 g and -0.70% per day. The higher the salinity, the growth of  G. gigas will be lower so that it will affect the absorption of Cu metal.

oai:ojs.ejournal.undip.ac.id:article/51471 2023-06-22T07:17:44Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/51471 2023-06-22T07:17:44Z Buletin Oseanografi Marina Vol 12, No 2 (2023): Buletin Oseanografi Marina; 290-304 Darma, I Wayan Eka; PT.PP(Persero)Tbk. Divisi Infrastruktur 2 Departemen Teknik Sipil Fakultas Teknik, Universitas Diponegoro Suharyanto, Suharyanto; 2Departemen Teknik Sipil Fakultas Teknik, Universitas Diponegoro Sugianto, Denny Nugroho; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2023-06-20 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/51471 pelabuhan; reklamasi; perizinan id Pelabuhan iMakassar imerupakan isalah isatu idari iempat ipelabuhan iutama idi iIndonesia idan iberperan sebagai ipintu igerbang iuntuk ikawasan itimur iIndonesia i(KTI). iDitinjau idari iposisi igeografisnya, ilokasi pelabuhan iIndonesia icukup istrategis idalam ijalur ipelayaran iinternasional, ikhususnya iuntuk iwilayah AIDA (Australian iIndonesia iDevelovment iArea) & iBIMP iEAGA i(Brunei, iIndonesia, iMalaysia,Philipina East iAsian iGrowth iArea) iserta iuntuk ijalaur iasia ipasifik. Pada tahun 2012 di Pelabuhan Makassar kegiatan bongkar muat sudah melebihi kapasitas pelabuhan dan dweling time yang cukup tinggi, sehingga menjadi faktor utama diperlukannya pengembangan pelabuhan di Makassar. Pembangunan makassar new port adalah salah satu pengembangan pelabuhan yang ada di Makassar untuk mengurangi dweling time di kota Makassar, pembangunan Makassar new port dengan cara metode reklamasi dimana Reklamasi dinilai merupakan teknologi yang cocok untuk menjawab kebutuhan lahan yang terbatas di perkotaan selain itu reklamasi menawarkan pelaksanaan yang cepat. Saat ini, pelaksanaan pengembangan Makassar New Port berada pada tahap IB dan tahap IC, penulis mengkaji teknologi reklamasi yang dipakai dalam proyek tersebut menggunakan system reklamasi urugan dengan kombinasi antara blanketfill dan hydrolycfill dengan metode pengambilan quary pasir dilaut, metode ini dipilih karena efisien dan ramah terhadap lingkungan, metodelogi penulis mengunakan metode kualitatif dengan membandingkan metode reklamasi dan letak quary pasir didalam pelaksanan reklamasi di makassar New Port.   The Makassar Port is one of the four main ports in Indonesia and has a role as the gateway for the East Indonesia Region (KTI). In terms of its geographical position, the location of Indonesian ports is quite strategic in international shipping routes, especially for the AIDA region (Australian Indonesia Development Area) & BIMP EAGA (Brunei, Indonesia, Malaysia, Philippines East Asian Growth Area) as well as for the Asia Pacific region. In 2012 at the Port of Makassar loading and unloading activities exceeded port capacity and dweling time was quite high, so that it became the main factor for the need for port development in Makassar. Makassar new port development is one of the existing port developments in Makassar to reduce dweling time in the city of Makassar, Makassar new port development by means of the reclamation method where Reclamation is considered a suitable technology to answer limited land requirements in urban areas besides that reclamation offers a more efficient implementation. fast. Currently, the implementation of the Makassar New Port development is at stage IB and stage IC, the author examines the reclamation technology used in the project using a landfill reclamation system with a combination of blanketfill and hydrolycfill with the method of taking sand quarry at sea, this method was chosen because it is efficient and friendly to environment, the author's methodology uses qualitative methods by comparing the reclamation method and the location of sand quarries in the implementation of reclamation in Makassar New Port.

oai:ojs.ejournal.undip.ac.id:article/27283 2021-02-01T08:05:56Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/27283 2021-02-01T08:05:56Z Buletin Oseanografi Marina Vol 9, No 2 (2020): Buletin Oseanografi Marina; 125-132 Nurhidayah, Triyanti; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Maslukah, Lilik; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Wulandari, Sri Yulina; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Kurnia, Kurnia; Pusat Survey Geologi 2020-10-15 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/27283 distribusi vertikal; trace metal; Pb; Zn; Cr id Pantai Marunda terletak di Teluk Jakarta dan berdekatan dengan muara Sungai Tiram. Kegiatan antropogenik di sekitar Pantai Marunda sangat tinggi, sehingga dapat menyumbang limbah yang mengandung logam berat Pb, Zn dan Cr. Limbah logam berat yang terakumulasi dalam perairan, akan  mengendap dalam sedimen dan seiring berjalannya waktu akan mengalami peningkatan. Tujuan dari penelitian ini, untuk mengetahui konsentrasi Pb, Zn, dan Cr berdasarkan kedalaman vertikal, hubungannya dengan karbon organik total (KOT) dan ukuran butir sedimen di Pantai Marunda. Sampel sedimen diambil menggunakan polietylen sediment core dan dipisahkan berdasarkan kedalamannya (1-3 cm, 4-6 cm, dan 7-9 cm). Logam berat dalam sedimen dianalisis menggunakan metode destruksi asam dan diukur nilai absorbansinya menggunakan AAS, karbon organik total menggunakan metode loss of ignition (LOI) dan analisa tekstur sedimen dengan metode pengayakan dilanjutkan pemipetan. Hasil menunjukkan bahwa konsentrasi rerata logam berat Pb, Zn, Cr secara berurutan pada lapisan atas sebesar 5,14; 107,19; dan 12,79 ppm, lapisan tengah sebesar 4,41; 100,20; 12,28  ppm serta lapisan bawah sebesar 4,8; 101,30; 14,10 ppm. Logam berat Zn dan Cr berkorelasi positif kuat terhadap KOT dan persentase lumpur, sedangkan terhadap Pb berkorelasi negatif. Hasil penelitian ini menggambarkan bahwa distribusi logam berat Pb, Zn dan Cr secara vertikal menunjukkan konsentrasi tinggi pada lapisan permukaan yaitu pada kedalaman sedimen 1-3 cm dan keberadaanya ditentukan oleh konsesntrasi  KOT dan fraksi sedimen jenis lumpur. The Marunda Beach is located on the Jakarta Bay and adjacent to the mouth of the Tiram River. Anthropogenic activity around Marunda Beach is very high, so it can contribute the heavy metals such as Pb, Zn and Cr. The heavy metal will accumulate in the sediment and over time will be increase. The purpose of this study was to determine the vertical distribution of Pb, Zn, Cr, and their relationship to total organic carbon (TOC) and the grain size. Sediment samples were taken using polyethylene cores and this sample separated based on their depth (1-3 cm, 4-6 cm, and 7-9 cm). The heavy metals were analyzed using acid destruction and absorbance values were measured using AAS, TOC using the loss of ignition (LOI) and sediment texture with a sifting method, followed by pipetting. The results showed that the average concentration of Pb, Zn, Cr in the upper layer was 5.14; 107.19; 12.79 ppm, in the middle layer of 4.41; 100.20; 12.28 ppm and in the lower layer 4.8; 101.30; 14.10 ppm, respectively. Zn and Cr are strongly positively correlated to TOC and mud, and vice versa, the relationship to Pb is negative. The results of this study found that the vertical distribution of Pb, Zn and Cr was high in the surface layer (1-3 cm) and their presence was determined by TOC concentration and mud fraction.

oai:ojs.ejournal.undip.ac.id:article/55838 2024-05-31T07:50:39Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/55838 2024-05-31T07:50:39Z Buletin Oseanografi Marina Vol 13, No 1 (2024): Buletin Oseanografi Marina; 122-135 Siahaan, Jane E V; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Kunarso, Kunarso; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Wijaya, Yusuf Jati; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2024-02-06 14:08:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/55838 EOF; Klorofil-a; Selat Makassar; Upwelling id Selat Makassar merupakan lintasan utama dari Arus Lintas Indonesia (ARLINDO). Letak geografis ini menyebabkan Selat Makassar memiliki variabilitas upwelling yang tinggi. Tujuan penelitian ini adalah mengkaji variabilitas musiman upwelling secara spasial dan temporal di Selat Makassar berdasarkan indeks upwelling, klorofil-a, nilai Rrs 443 dan 555, SPL (Suhu Permukaan Laut), SSHA (Sea Surface Height Anomalies) dan EMT (Ekman Mass Transport). Data yang digunakan pada penelitian ini adalah klorofil-a dari OC-CCI (Ocean Colour Climate Change Initiative), SPL dari OISST (Optimum Interpolation Sea Surface Temperature), angin dari ASCAT (Advanced Scatterometer), serta SSHA, Rrs 443, dan Rrs 555 dari situs marine Copernicus yang diolah dengan dengan metode komposit menggunakan software IDL (Interactive Data Language) dan NCL (NCAR Command Language). Puncak upwelling terjadi pada bulan Agustus (musim timur) yang ditandai dengan penurunan SPL (26.66 °C) dan SSHA (-2.27cm), EMT (5.27 ), serta peningkatan klorofil-a hingga 0.80 mg/ , dan indeks upwelling yang bernilai positif (0.948 °C). Hasil Rrs 443 dan Rrs 555 yang tergolong rendah mengindikasikan bahwa terdapat kelimpahan fitoplankton pada Selat Makassar. Musim timur (JJA) EOF1 dan PC1 sebesar 40.0 % serta EOF2 dan PC2 sebesar 10.9%. Hasil EOF1 memiliki pola yang mirip dengan peta spasial klimatologi klorofil-a. Hal tersebut dipengaruhi oleh faktor fisik seperti angin. Nilai anomali positif maupun negatif dipengaruhi fenomena iklim seperti El Nino dan La Nina yang terjadi pada tiap tahunnya. Pada hasil EOF juga didapatkan variabilitas tinggi pada daerah di sekitar 4  – 6  LS.  The Makassar Strait is the main route of the Indonesian Cross Flow (ARLINDO). This geographical location causes the Makassar Strait to have high upwelling variability. The aim of this research is to examine the seasonal variability of upwelling spatially and temporally in the Makassar Strait based on the upwelling index, chlorophyll-a, Rrs 443 and 555 values, SST (Sea Surface Temprature), SSHA (Sea Surface Height Anomalies) and EMT (Ekman Mass Transport). The data used in this research are chlorophyll-a from OC-CCI (Ocean Colour Climate Change Initiative), SST from OISST (Optimum Interpolation Sea Surface Temperature), wind from ASCAT (Advanced Scatterometer), and SSHA, Rrs 443, and Rrs 555 from the Copernicus marine site which were processed using the composite method using IDL (Interactive Data Language) and NCL (NCAR Command Language) software. The peak of upwelling occurred in August (eastern season) which was marked by a decrease in SST (26.66 °C) and SSHA (-2.27cm), EMT (5.27 ), as well as an increase in chlorophyll-a up to 0.80 mg/ , and the upwelling index is positive (0.948 °C). The results of Rrs 443 and Rrs 555 which are relatively low indicate that there is an abundance of phytoplankton in the Makassar Strait. East monsoon (JJA) EOF1 and PC1 is 40.0% and EOF2 and PC2 is 10.9%. The EOF1 results have a similar pattern to the spatial map of chlorophyll-a climatology. This is influenced by physical factors such as wind. Positive and negative anomaly values are influenced by climate phenomena such as El Nino and La Nina which occur every year. The EOF results also show high variability in the area around 4° – 6° South Latitude.

oai:ojs.ejournal.undip.ac.id:article/11166 2016-05-31T02:43:33Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/11166 2016-05-31T02:43:33Z Buletin Oseanografi Marina Vol 2, No 4 (2013): Buletin Oseanografi Marina; 1-8 Ridlo, Ali; Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro Subagiyo, Subagiyo; Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/11166 en Prebiotik fruktooligosakarida (FOS) diketahui berperan penting dalam proses digesti, absorpsi dan metabolisme nutrien dalam organisme. Suplementasi prebiotik telah terbukti mampu meningkatkan pertumbuhan, utilisasi nutrien dan resistensi terhadap penyakit, tetapi potensi prebiotik terhadap udang belum banyak diketahui. Suplementasi FOS dalam pakan diamati pengaruhnya terhadap parameter pertumbuhan udang L. vannamei selama 12 hari. FOS disuplementasikan ke dalam pakan udang buatan (protein 38%, lemak 5%, dan serat 3%) dengan konsentrasi 0,5%; 1,0%; dan 2,0% (w/w). Efek prebiotik terhadap parameter pertumbuhan (berat dan panjang), kelulushidupan dan rasio konversi pakan diamati pada hari ke empat, ke delapan dan hari ke dua belas perlakuan. Hasil penelitian menunjukkan bahwa sampai hari ke dua belas suplementasi prebiotik FOS mampu meningkatkan pertumbuhan (berat dan panjang), tetapi tidak berpengaruh terhadap kelulus hidupan dan rasio konversi pakan. Kata kunci : Prebiotik, FOS, L. vannamei

oai:ojs.ejournal.undip.ac.id:article/31990 2021-09-19T19:04:11Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/31990 2021-09-19T19:04:11Z Buletin Oseanografi Marina Vol 10, No 3 (2021): Buletin Oseanografi Marina; 242-250 Fitrian, Annisa Putri; Universitas Padjadjaran Taofiqurohman, Ankiq; Universitas Padjadjaran Mulyani, Yeni; Universitas Padjadjaran Pamungkas, Wahyuniar; Universitas Padjadjaran 2021-09-20 02:02:02 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/31990 Karakteristik Fisik Pantai; Pantai Batu Karas; Tipe Pantai id Pantai merupakan salah satu objek wisata alam yang paling diminati pengunjung, namun memiliki risiko bahaya tersendiri yang patut diwaspadai. Risiko bahaya yang melekat dimiliki oleh setiap pantai adalah bahaya akibat karakteristik fisik pantai. Pantai Wisata Batu Karas merupakan salah satu objek wisata pantai terfavorit di Jawa Barat dengan peningkatan jumlah pengunjung setiap tahunnya. Selain memiliki berbagai daya tarik wisata, Pantai Batu Karas memiliki risiko bahaya fisik. Risiko bahaya fisik yang dominan di pesisir selatan Jawa Barat, termasuk Pantai Wisata Batu Karas, adalah gelombang pecah karena berbatasan langsung dengan Samudera Hindia yang memicu risiko gelombang tinggi. Keselamatan wisata merupakan hal yang harus diutamakan untuk mencegah kerugian yang mungkin terjadi akibat risiko bahaya. Hal ini dapat dilakukan dengan melakukan penilaian bahaya fisik pantai untuk selanjutnya dapat dijadikan bahan pertimbangan dalam pengelolaan wisata pantai. Riset ini bertujuan untuk menentukan tipe pantai Batu Karas sebagai langkah awal penilaian bahaya fisik pantai akibat gelombang pecah di Pantai Wisata Batu Karas. Riset ini dilakukan pada bulan Januari – Mei 2020, dengan area yang diteliti adalah sepanjang Pantai Wisata Batu Karas. Metode yang digunakan dalam riset ini yaitu metode kuantitatif, selanjutnya dilakukan penentuan tipe pantai yang mengacu pada metode yang dikembangkan oleh Short (1996). Parameter yang digunakan dalam riset ini adalah tinggi dan periode gelombang pecah, kecepatan jatuh sedimen, dan nilai tunggang pasut. Hasil yang didapatkan dari riset ini adalah Pantai Batu Karas memiliki tipe pantai longshore bar and trough, yang selanjutnya dapat digunakan untuk penilaian tingkat bahaya fisik di Pantai Wisata Batu Karas. Beach is one of the most popular natural attractions for visitors, but has its own dangers that need to be watched out for. The inherent hazard risk possessed by each beach is the danger due to the physical characteristics of the beach. Batu Karas Tourism Beach is one of the most favorite beach attractions in West Java with an increasing number of visitors every year. Apart from having various tourist attractions, Batu Karas Tourism Beach also has a risk of physical danger. The dominant physical hazard risk on the southern coast of West Java, including Batu Karas Tourism Beach, is the breaking waves because it is directly adjacent to the Indian Ocean which triggers a high risk of waves. Tourism safety is a matter that must be prioritized to prevent losses that may occur due to hazard risks. This can be done by assessing the physical hazard of the beach which can then be used as a consideration in the management of beach tourism. This research aims to determine the type of beach as an initial step to assess the physical beach hazards in Batu Karas Beach, Pangandaran Regency, West Java. This research was conducted from January – May 2020 and focused on the Batu Karas shoreline area. Quantitative method was used to determine the beach type by referring to the method developed by Short (1996). The parameters used in this research are height and period of the breaker wave, sediment fall velocity, and tide range. The result shows that Batu Karas Beach has longshore bar and trough type, which can then be used for assessing the level of physical hazards at Batu Karas Tourism Beach.

oai:ojs.ejournal.undip.ac.id:article/62565 2026-02-11T04:53:31Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/62565 2026-02-11T04:53:31Z Buletin Oseanografi Marina Vol 14, No 1 (2025): Buletin Oseanografi Marina; 61-68 Sitorus, Rijal; Jurusan Ilmu Kelautan, Fakultas Matematika dan Ilmu Pengetahuan, Universitas Sriwijaya Putri, Wike Ayu Eka; Departemen Ilmu Kelautan, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Sriwijaya Agustriani, Fitri; Jurusan Ilmu Kelautan, Fakultas Matematika dan Ilmu Pengetahuan, Universitas Sriwijaya Diansyah, Gusti; Jurusan Ilmu Kelautan, Fakultas Matematika dan Ilmu Pengetahuan, Universitas Sriwijaya Isnaini, Isnaini; Jurusan Ilmu Kelautan, Fakultas Matematika dan Ilmu Pengetahuan, Universitas Sriwijaya Purwiyanto, Anna Ida Sunaryo; Jurusan Ilmu Kelautan, Fakultas Matematika dan Ilmu Pengetahuan, Universitas Sriwijaya Suteja, Yulianto; Program Studi Ilmu Kelautan, Fakultas Kelautan dan Perikanan, Universitas Udayana Meiyerani, Jeni; Program Studi Pengelolaan Lingkungan, Pascasarjana, Universitas Sriwijaya 2025-02-20 05:07:26 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/62565 Air; Fosfat; Nitrat; Pulau Payung; Sedimen id Nutrien merupakan material kimia yang penting bagi kelangsungan hidup organisme perairan. Keberadaannya di kolom perairan dapat dijadikan sebagai penentu apakah perairan berada dalam kondisi subur atau tidak. Sumber nutrien di perairan dapat berasal dari aktivitas manusia seperti pemukiman dan pertanian yang terdapat di darat dan masuk ke kawasan muara melalui aliran sungai. Meskipun demikian, masuknya nutrien dalam jumlah besar dapat menurunkan kualitas perairan karena dapat memicu terjadinya eutrofikasi. Penelitian ini bertujuan untuk mengetahui kondisi nutrien di air dan sedimen serta TSS dan karakteristik sedimen di sekitar Perairan Pulau Payung. Pengambilan sampel dilaksanakan bulan September 2022 pada 5 stasiun penelitian, analisis nitrat dan fosfat pada sampel air mengacu pada metode brusin sulfat SNI 06-2480-1991 dan SNI 6989.31-2015. Analisis nitrat pada sedimen menggunakan metode bruan  dan  analisis fosfat  merujuk pada metode SNI 19-2483-1991. Analisis tekstur sedimen menggunakan metode ayak kering dan analisa TSS dengan metode penyaringan. Hasil penelitian menunjukkan konsentrasi nitrat di kolom perairan Pulau Payung berkisar 1,7-2,8 mg/l (telah melebihi baku mutu, 0,008 mg/L berdasarkan Kepmen LH (2004) dan 0,07 mg/L berdasarkan US-EPA (1973), sementara fosfat berkisar 0,25-0,48 mg/l (tidak melebihi baku mutu 0,2 – 1,0 mg/L berdasarkan Kepmen LH PP RI No.22 Tahun 2021). Konsentrasi nitrat sedimen Pulau Payung berkisar 24,69-40,41 mg/kg (tergolong perairan dengan kandungan nitrat tinggi) dan fosfat berkisar 1,15-1,54 mg/kg (tergolong perairan dengan kandungan fosfat sangat rendah). Sedimen Pulau Payung sebagian besar didominasi substrat lempung dan sebagian kecil lempung berpasir. Adapun nilai TSS yang ditemukan berkisar antara 115,22 – 212,97 mg/l.

oai:ojs.ejournal.undip.ac.id:article/15738 2020-04-17T12:03:36Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/15738 2020-04-17T12:03:36Z Buletin Oseanografi Marina Vol 6, No 1 (2017): Buletin Oseanografi Marina; 24-28 Hariyadi, Hariyadi; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Marwoto, Jarot; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Yulihandoko, Eko; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2017-08-28 16:35:23 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/15738 Perubahan permukaan laut; Altimetry; Jason-1; Envisat en Dinamika lautan di Indonesia merupakan salah satu kunci variasi iklim di kawasan Asia. Variasi iklim ini terkait dengan fenomena El Nino dan La Nina. Salah satu indikator fenomena tersebut adalah dengan adanya perubahan permukaan laut (Sea Level Anomaly). Satelit altimetri yang dapat menyediakan data secara menerus dan berkelanjutan dapat digunakan untuk mengamati dinamika lautan. Penggabungan data satelit Jason-1 dan Envisat ditujukan untuk mengatasi resolusi spasial dari tracking tiap satelit. Pengabungan dan prosesing data Jason-1 dan Envisat digunakan untuk menentukan perubahan Sea Level Anomaly (SLA) pada titik-titik pengamatan di Laut Bangka, Laut Banda, Lautan Pasifik dan Laut Timor. Titik-titik tersebut mewakili dari Arus Monsoon Indonesia dan Arus Lintas Indonesia. Hasilnya terjadi perubahan nilai SLA yang dapat dikaitkan dengan fenomena El Nino. The dynamics of the oceans in Indonesia is one of the key climate variations in Asia. These climate variations are related to the phenomenon of El Nino and La Nina. One indicator of the phenomenon is with the change of sea level (Sea Level Anomaly). The existence of altimetry satellites that can provide continuous and continuous data can be used to observe the dynamics of the oceans. Jason-1 and Envisat satellite data aggregation is intended to address the spatial resolution of tracking of each satellite. Jason-1 and Envisat data consolidation and processing are used to determine the Sea Level Anomaly (SLA) changes at observation points in the Bangka Sea, Banda Sea, Pacific Ocean and Timor Sea. These points represent from the Indonesian Monsoon Flow and the Indonesian Cross Flow. The result is a change in the value of SLA that can be attributed to the El Nino phenomenon.

oai:ojs.ejournal.undip.ac.id:article/38451 2023-01-25T06:05:53Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/38451 2023-01-25T06:05:53Z Buletin Oseanografi Marina Vol 11, No 3 (2022): Buletin Oseanografi Marina; 248-254 Sari, Meitha Permata; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjajaran Riyantini, Indah; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjajaran Ihsan, Yudi Nurul; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Padjajaran 2022-10-01 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/38451 Anadara granosa; filter feeder; Pb; pencemaran id Laut dan pesisir Kabupaten Cirebon banyak dimanfaatkan untuk pertambakan, penggunaan lahan mangrove, penangkapan ikan, dan budidaya perairan. Meningkatnya aktivitas domestik, rumah tangga, dan industri memberikan dampak negatif bagi perairan laut yakni pencemaran. Pencemaran yang terjadi salah satunya ialah pencemaran logam Pb terhadap Anadara granosa atau kerang dara. Anadara granosa merupakan hewan bentik dan filter feeder dimana akumulasi logam Pb lebih besar dibandingkan dengan biota laut lain, hal tersebut perlu diperhatikan mengingat kerang dara diminati oleh masyarakat untuk dikonsumsi. Tujuan penelitian ini ialah mendapatkan kadar logam Pb pada substrat, air laut, dan Anadara granosa yang diambil dari Kecamatan Gunung Jati, Kabupaten Cirebon sebagai wilayah penangkapan ikan. Metode yang digunakan ialah metode survey dan penentuan stasiun penelitian menggunakan metode purposive sampling. Pada setiap stasiun dilakukan pengambilan sampel substrat, air laut, dan Anadara granosa untuk diketahui kadar logam Pb. Penentuan kadar logam Pb pada sampel dilakukan di Laboratorium Sentral Universitas Padjajaran Jatinangor, Sumedang, Jawa Barat merujuk pada pedoman SNI 066992.3-2004 menggunakan instrumen Spektrofotometer Serapan Atom. Hasil penelitian menunjukkan rata-rata kadar logam Pb substrat sebesar 19,53 mg/l, air laut sebesar 0,16 mg/l, Anadara granosa sebesar 1,07 mg/kg. The sea and coast of the Cirebon Regency are widely used for aquaculture, mangrove land use, fishing, and aquaculture. Increasing domestic, household and industrial activities harm marine waters, namely pollution. One of the pollutions that occur is the contamination of Pb metal against Anadara granosa or virgin shells. The hyena shells are benthic animals and filter feeders where the accumulation of Pb metal is greater than that of another marine biota, it is necessary to pay attention to this, considering that the hymen is in demand by the public for consumption. The purpose of this study was to obtain Pb levels in the substrate, seawater, and virgin clams. The method used is a survey method and the determination of the research station using a purposive sampling method. At each station, substrate, seawater, and virgin shellfish were sampled to determine the Pb metal content. Determination of Pb metal content in the sample using an Atomic Absorption Spectrophotometer. The results showed that the average Pb content of the substrate was 19.53 mg/l, seawater was 0.16 mg/l, and virgin clams were 1.07 mg/kg.

oai:ojs.ejournal.undip.ac.id:article/6908 2014-05-20T02:25:03Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6908 2014-05-20T02:25:03Z Buletin Oseanografi Marina Vol 1, No 3 (2012): Buletin Oseanografi Marina; 33-38 Endrawati, Hadi; Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro Manulang, Christin; Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro Widianingsih, Widianingsih; Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro 2012-04-22 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6908 en Spirulina platensis tergolong kedalam Divisi Cyanophyta dengan kemampuan adaptasi yang baik terhadap pengaruh faktor lingkungan yang cukup bervariasi seperti suhu, salinitas, intensitas cahaya, nutrien dan fotoperioda.  Faktor lingkungan dapat mempengaruhi komposisi dan kadar lipid, protein, dan karbohidrat. Lipid berfungsi sebagai penyedia asam lemak dan sumber energi cadangan. Penelitian ini bertujuan untuk optimasi kadar total lipid dan densitas dari mikroalga Spirulina platensis yang dikultur pada fotoperioda berbeda. Penelitian ini menggunakan Rancangan Acak Lengkap dengan perlakuan fotoperioda 4 jam terang 20 jam gelap, 8 jam terang 16 jam gelap, 12 jam terang 12 jam gelap, dan 24 jam terang. Hasil penelitian menunjukkan bahwa kepadatan S. platensis tertinggi pada perlakuan 24 jam terang, yaitu (1591 ± 16) x 103 sinusoidal/l pada fase stasioner dan kepadatan terendah pada perlakuan 4 jam terang 20 jam gelap yaitu (1087 ± 62) x 103 sinusoidal/l. Selanjutnya total lipid tertinggi pada fotoperioda 4 jam terang 20 jam gelap (46,1 ±27,93 %-dw) dan total lipid terendah pada perlakuan 24 jam terang sebesar (24,8 ±5,23 %-dw). Kata kunci: Spirulina platensis, densitas, fotoperiod, total lipid

oai:ojs.ejournal.undip.ac.id:article/63696 2025-10-18T08:20:06Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/63696 2025-10-18T08:20:06Z Buletin Oseanografi Marina Vol 14, No 3 (2025): Buletin Oseanografi Marina; 425-437 https://ejournal.undip.ac.id/index.php/buloma/article/download/63696/208056 Yustina, Nurul; Departemen Sumber Daya Akuatik, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Rudolf Muskananfola, Max; Departemen Sumber Daya Akuatik, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Ayuningrum, Diah; Departemen Sumber Daya Akuatik, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Febrianto, Sigit; Departemen Sumber Daya Akuatik, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2025-10-18 15:20:03 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/63696 Donax incarnatus; Identifikasi Molekuler; Kecamatan Tugu; Perna viridis; Pohon Filogenetik id Ekosistem mangrove berada pada wilayah intertidal yang memiliki interaksi dinamis antara perairan laut, payau, sungai dan terestrial. Fungsi ekologis ekosistem mangrove sebagai pelindung pantai dari erosi, feeding ground, nursery ground, dan spawning ground bagi biota perairan. Biota yang beragam termasuk moluska kelas bivalvia banyak ditemui di daerah mangrove. Identifikasi spesies bivalvia secara molekuler di kawasan mangrove penting dilakukan untuk mengetahui spesies-spesies bivalvia yang ditemukan secara akurat. Tujuan penelitian ini adalah mengetahui spesies bivalvia di lokasi penelitian dan mengetahui hubungan filogenetik spesies yang telah ditemukan melalui analisis pohon filogenetik. Metode yang digunakan dalam penelitian ini adalah deskriptif kuantitatif dengan metode pengambilan sampel purposive sampling. Penelitian ini berlangsung pada bulan September – Desember 2023. Penanda genetik yang digunakan dalam penelitian ini adalah gen Cytochrome Oxydase I (COI) dengan penyejajaran sekuens DNA menggunakan metode maximum likelihood. Analisis filogenetik berbasis algoritma neighbor joining (NJ) 1000 bootstrap pada software MEGA XI. Hasil data sequencing kemudian dianalisis menggunakan BLAST dan menunjukkan sampel BM1 memiliki kemiripan sebanyak 99% dengan spesies Donax incarnatus sedangkan 99,85% pasa sampel BM2 dengan dengan spesies Perna viridis. Hasil analisis filogenetik menunjukkan kladogram kedua spesies ini terdapat pada klade yang berbeda. Klade I terdiri dari sampel BM1 beserta 4 spesies pembanding lainnya yaitu Donax incarnatus, Donax obesulus, Donax deltoides, dan Donax faba. Klade II terdiri dari sampel BM2 beserta 4 spesies pembanding lainnya yaitu Perna viridis, Perna canaliculus, Perna perna, dan Perna Picta.

oai:ojs.ejournal.undip.ac.id:article/19574 2020-04-17T12:06:05Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/19574 2020-04-17T12:06:05Z Buletin Oseanografi Marina Vol 7, No 2 (2018): Buletin Oseanografi Marina; 121-130 Lestariningsih, Wiwid Andriyani; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Soenardjo, Nirwani; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Pribadi, Rudhi; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2018-10-08 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/19574 Mangrove; Carbon; Biomass; Timbulsloko; Demak en Ekosistem mangrove merupakan salah satu ekosistem yang berperan dalam mengurangi karbon di udara, dan menyimpan karbon dari udara dalam bentuk biomassa pada bagian tubuh tumbuhan mangrove. Penelitian tentang estimasi cadangan karbon ini sangat diperlukan untuk menunjang perbaikan iklim dunia. Karena saat ini dunia sedang mengalami krisis global yang disebut climate change. Tujuan penelitian ini adalah mengestimasi cadangan karbon yang tersimpan pada tegakan dan substrat mangrove di kawasan mangrove Desa Timbulsloko. Metode yang digunakan yaitu purposive sampling method dan eksploratif, dilakukan di tiga stasiun dengan kondisi ekosistem mangrove yang bervariasi. Setiap stasiun penelitian dibagi menjadi tiga plot penelitian untuk menghitung nilai biomassa tegakan digunakan rumus allometrik untuk mengestimasi cadangan karbon pada tegakan mangrove. Data karbon substrat didapat dari kandungan bahan organik substrat yang dianalisis di Laboratorium. Berdasarkan hasil penelitian, diketahui bahwa cadangan karbon pada tegakan mangrove sebesar 12.370,8 ton/ha, sedangkan estimasi cadangan karbon pada substrat mangrove sebesar 1.307,77 ton/ha. Hasil tersebut menunjukkan bahwa estimasi cadangan karbon pada tegakan mangrove lebih besar dibandingkan dengan estimasi cadangan karbon pada substrat mangrove. Hasil estimasi cadangan karbon pada tegakan mangrove meningkat seiring dengan meningkatnya besarnya biomassa tumbuhan dan kerapatan mangrove. Sedangkan estimasi cadangan karbon pada substrat diduga lebih dipengaruhi oleh bahan organik dan lokasi penelitian. Estimates of Carbon Stok in the Mangrove Area in Timbulsloko Village,Demak, Central Java Mangrove ecosystem is one of the ecosystem that play a role in reducing carbon in the air. One of the functions of mangrove is to store carbon from the air form of biomass in the body parts of mangrove plants. This research on the estimation of carbon stocks is needed to support the improvement of world climate. Today the world is experiencing a global crisis called climate change. The purpose of this research are estimate of carbon stock on stands and substrate in mangrove area of Timbulsloko Village. This research used purposive sampling and explorative method, conducted in three stations with varying mangrove ecosystem conditions. The research was divided into three research plots per station to calculate the stand biomass value using allometric formula in estimating carbon stocks of mangrove area. Substrate carbon data obtained from the content of substrate organic materials analyzed at Laboratorium. Based on the result of research, it is found that carbon stock in mangrove stands is 12.370,8 ton/ha, while estimation of carbon stock on mangrove substrate is 1.307 ton/ha. These results show that estimates of carbon stocks in mangrove stands are greater than estimates of carbon stocks on mangrove substrates. The estimation of carbon stocks on mangrove stands increases with increasing of plant biomass and mangrove density, while estimates of carbon stocks on the substrate are suspected to be more influenced by organic materials and research sites.

oai:ojs.ejournal.undip.ac.id:article/48287 2023-06-20T04:50:15Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/48287 2023-06-20T04:50:15Z Buletin Oseanografi Marina Vol 12, No 2 (2023): Buletin Oseanografi Marina; 201-212 Rachman, Reno Arief; Departemen Teknik Kelautan, Fakultas Teknologi Kelautan, Institut Teknologi Sepuluh Nopember Armono, Haryo Dwito; Departemen Teknik Kelautan, Fakultas Teknologi Kelautan, Institut Teknologi Sepuluh Nopember Wibowo, Mardi; Pusat Riset Teknologi Hidrodinamika, Badan Riset dan Inovasi Nasional Istiyanto, Dinar Catur; Pusat Riset Teknologi Hidrodinamika, Badan Riset dan Inovasi Nasional 2023-06-20 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/48287 sedimen dasar; tanggul laut; gradistat; NCICD; tekstur sedimen Id Program NCICD (National Capital Integrated Coastal Development) merupakan program strategis nasional untuk menangani permasalahan di Teluk Jakarta. Salah satu rencananya adalah dengan membangun waduk lepas pantai (WLP) di Perairan Tanjung Pasir, Banten. WLP selain berfungsi sebagai tanggul laut juga sebagai penyedia air baku. Dalam perencanaan WLP salah satu pertimbangan utama adalah permasalahan sedimentasi. Proses sedimentasi di perairan sangat terkait dengan karakteristik sedimen. Tujuannya penelitian ini adalah untuk mengetahui pola sebaran karakteristik sedimen dasar seperti kadar air, berat jenis, gradasi, tekstur sedimen, ukuran d50 butir sedimen dan analisis statistik sedimen dasar sehingga dapat mendukung rencana pembangunan WLP NCICD. Metode yang dipakai adalah pengambilan sampel sedimen di lapangan, pengujian sampel sedimen di laboratorium, analisis sedimen secara statistik dan analisis deskriptif karakteristik sedimen dasar menggunakan metode Gradistat. Berdasarkan hasil kajian diketahui nilai kadar air 39,657 % - 413,83 %, berat jenis 1,633 g/cm3 – 2,557 g/cm3, ukuran butir 0,085 mm – 2,0 mm, ukuran rerata butir 261,1 µm - 2657,5 µm, sortasi sedimen very poorly sorted (terpilah sangat buruk) dan poorly sorted (terpilah buruk), analisis statistik sedimen tipe very platykurtic, jenis lithologi didominasi oleh pasir, sedikit berukuran lanau dan pasir halus hingga pasir sedang. Sedimen dasar di perairan ini mempunyai daya dukung tanah yang baik untuk dibangun WLP.   The NCICD (National Capital Integrated Coastal Development) is a national strategic program to deal with problems in Jakarta Bay. One of the plans is to build a sea dike (WLP) in Tanjung Pasir, Banten. In addition to functioning as a sea wall, WLP is also a raw water provider. In WLP planning, one of the primary considerations is the problem of sedimentation. The sedimentation process in the waters is closely related to the characteristics of the sediment. This study aimed to determine the distribution pattern of bottom sediment characteristics such as water content, specific gravity, gradation, sediment texture, d50 sediment grain size, and statistical analysis of bottom sediments to support the NCICD WLP development plan. The method used is taking sediment samples in the field, testing sediment samples in the laboratory, statistical analysis of sediments, and descriptive analysis of bottom sediment characteristics using the Gradistat method. Based on the results of the study, it is known that the water content is 39.657% - 413.83%, the specific gravity is 1.633 g/cm3 – 2.557 g/cm3, the grain size is 0.085 mm – 2.0 mm, the average grain size is 261.1 µm - 2657.5 µm, Sediment sorting is very poorly sorted and poorly sorted, statistical analysis is classified as very platykurtic type, lithology type dominated by sand, slightly silt, and fine sand to medium sand. The bottom sediments in these waters have good soil-carrying capacity for WLP construction.

oai:ojs.ejournal.undip.ac.id:article/6944 2021-07-09T08:21:17Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6944 2021-07-09T08:21:17Z Buletin Oseanografi Marina Vol 2, No 2 (2013): Buletin Oseanografi Marina; 87-96 Sulardiono, Bambang; Program Studi Manajemen Sumberdaya Perikanan, Jurusan Perikanan, FPIK-UNDIP 2013-04-18 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6944 en Secara ekologis, wilayah penelitian merupakan perairan yang memiliki ekosistem dominan terumbu karang beserta asosiasinya dan . mempunyai fungsi ekologis yang sangat penting. Fungsi tersebut diantaranya adalah  dapat menyediakan sumber makanan dan habitat bagi berbagai sumberdaya laut. Salah satu kekayaan sumberdaya laut yang dimiliki oleh perairan  Karimunjawa adalah  teripang (Echinodermata : Holothurians).   Arus dan pasang surut merupakan salah satu faktor hidro-oseanografi yang membatasi sebaran teripang. Penelitian dilakukan di perairan Karimunjawa, dengan tujuan penelitian  untuk mengetahui : (1) fenomena arus dan pasang surut di perairan Karimunjawa, (2) hubungan antara arus dan densitas teripang di perairan pantai Karimunjawa. Pengumpulan data pasang surut menggunakan  metode admiralty, sedangkan untuk mengetahui  karakteristik arus, dilakukan pemodelan dengan menggunakan software SMS (Surface-water Modelling System) di Perairan Karimunjawa.  Pengumpulan data teripang digunakan metoda transek. Hasil penelitian menunjukkan tipe pasang surut perairan  Karimunjawa adalah campuran cenderung tunggal. Kecepatan arus hasil model pada kondisi perbani saat surut menuju pasang adalah 0,05 m/s. Kecepatan arus hasil model pada saat pasang menuju surut adalah 0,001 m/s. Kondisi arus  14 Mei 2011 Kecepatan arus hasil model pada kondisi perbani saat surut menuju pasang adalah 0,009 m/s. Kecepatan arus hasil model pada saat pasang menuju surut adalah 0,003 m/s.Kondisi arus  24 Juli 2011 Kecepatan arus hasil model pada kondisi perbani saat surut menuju pasang adalah 0,008 m/s. Kecepatan arus hasil model pada saat pasang menuju surut adalah 0,003 m/s. Hasil analisis menunjukan terdapatnya perbedaan yang  nyata antara kecepatan arus saat pasang dan saat surut Hasil uji korelasi antara densitas teripang dengan kondisi arus di perairan Karimunjawa menunjukkan hubungan yang kurang kuat.   Kata kunci:  arus, pasang surut, teripang, Karimunjawa

oai:ojs.ejournal.undip.ac.id:article/56751 2024-05-31T07:50:39Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/56751 2024-05-31T07:50:39Z Buletin Oseanografi Marina Vol 13, No 1 (2024): Buletin Oseanografi Marina; 13-20 Putri, Wike Ayu Eka; Departemen Ilmu Kelautan, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Sriwijaya Purwiyanto, Anna Ida Sunaryo; Jurusan Ilmu Kelautan, Fakultas Matematika Dan Ilmu Pengetahuan Alam, Universitas Sriwijaya Diansyah, Gusti; Jurusan Ilmu Kelautan, Fakultas Matematika Dan Ilmu Pengetahuan Alam, Universitas Sriwijaya Rozirwan, Rozirwan; Jurusan Ilmu Kelautan, Fakultas Matematika Dan Ilmu Pengetahuan Alam, Universitas Sriwijaya Fauziyah, Fauziyah; Jurusan Ilmu Kelautan, Fakultas Matematika Dan Ilmu Pengetahuan Alam, Universitas Sriwijaya Agustriani, Fitri; Jurusan Ilmu Kelautan, Fakultas Matematika Dan Ilmu Pengetahuan Alam, Universitas Sriwijaya Haryati, Ani; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Jenderal Soedirman Gusri, Ariqoh Athallah; Program Studi Pengelolaan Lingkungan, Program Pascasarjana, Universitas Sriwijaya 2024-02-06 14:07:55 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/56751 Cd; Logam berat; Sungai Musi id Pemanfaatan daerah aliran sungai seringkali memberikan dampak negatif terhadap kualitas perairan. Kondisi ini pada akhirnya akan berdampak terhadap keamanan pangan yang berasal dari wilayah tersebut. Salah satu komponen bahan pencemar yang umum ditemukan di perairan dan menjadi ancaman bagi keamanan pangan adalah logam berat Cd. Penelitian bertujuan mengetahui konsentrasi logam berat Cd pada beberapa komponen ekosistem yang ada di Sungai Musi bagian hilir meliputi air, sedimen dan tiga organ ikan (insang, hati dan daging). Ikan yang menjadi objek penelitian adalah empat jenis ikan yang umum tertangkap meliputi ikan Juaro (Pangasius polyuranodon), ikan Sembilang (Paraplotosus albilabris), ikan Seluang (Rasbora sp) dan ikan Belanak (Mugil chepalus). Sampel air dan sedimen diambil dari sekitar Sungai Musi bagian hilir yang dibagi menjadi delapan (8) stasiun penelitian selama periode Maret, Mei dan November 2018. Adapun sampel ikan diambil dari nelayan sekitar yang menangkap ikan di kawasan tersebut. Sampel dianalisa merujuk pada metode USEPA 30050B dan dianalisa menggunakan AAS. Hasil penelitian menunjukkan bahwa konsentrasi rata-rata logam berat Cd pada sampel air kecil dari 0,001 mg/l dan pada sedimen berkisar antara 0,223-0,419 mg/kg. Konsentrasi rata-rata Cd pada organ hati, insang dan daging ikan Seluang adalah 0,117, 0,034 dan 0,021 mg/kg, ikan Juaro 0,059, 0,051 dan 0,027 mg/kg, ikan Belanak 0,096, 0,031 dan 0,025 mg/kg, ikan Sembilang 0,102, 0,046 dan 0,032 mg/kg. Konsentrasi logam berat Cd pada sampel air, sedimen dan daging ikan Seluang, ikan Juaro, ikan Belanak dan ikan Sembilang masih dibawah baku mutu dan ambang batas yang ditetapkan.   Utilization of river often has a negative impact on water quality. This condition will influence on the security of food originating from this area. One component of pollutants that is commonly found in waters and poses a threat to food safety is heavy metal such as Cd. The research aims to determine the concentration of the heavy metal Cd in several ecosystem components in the Musi River Estuary, including water, sediment and three fish organs (gills, liver and meat). Object of this research are four types of fish that are commonly caught, such as Juaro fish (Pangasius polyuranodon), Sembilang fish (Paraplotosus albilabris), Seluang fish (Rasbora sp) and Belanak fish (Mugil chepalus). Water and sediment samples were taken from around the Musi River downstream, divided into eight (8) research stations during March, May and November 2018. Fish samples were taken from local fishermen who caught fish in the area. Samples were analyzed using the USEPA 30050B and AAS (atomic absorption spectrophotometer). The results showed that the average concentration of the heavy metal Cd in water samples was less than 0.001 mg/l, in sediments ranging from 0.223 to 0.419 mg/kg. The average concentration of Cd in the liver, gills and muscle of Seluang fish was 0.117, 0.034 and 0.021 mg/kg, Juaro fish 0.059, 0.051 and 0.027 mg/kg, Belanak fish 0.096, 0.031 and 0.025 mg/kg, Sembilang fish 0.102, 0.046 and 0.032 mg/kg. The concentration of the heavy metal Cd in samples of water, sediment and muscles of Seluang, Juaro, Belanak and Sembilang fish was still below some specified quality standards.

oai:ojs.ejournal.undip.ac.id:article/42285 2023-11-04T02:49:24Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/42285 2023-11-04T02:49:24Z Buletin Oseanografi Marina Vol 12, No 3 (2023): Buletin Oseanografi Marina; 340-346 Fransiska, Julia; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Sedjati, Sri; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro, Endrawati, Hadi; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2023-10-01 06:25:40 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/42285 Kepadatan sel; biomassa; klorofil; karotenoid id Nannochloropsis sp. merupakan fitoplankton dengan kemampuan memproduksi pigmen klorofil-a, b, dan karotenoid yang berperan dalam fotosintesis. Produksi pigmen Nannochloropsis sp. dipengaruhi utama oleh faktor cahaya. Pemberian sinar UV berpotensi memberikan rangsangan terhadap fitoplankton pada pertumbuhan sel dan produksi pigmen. Penelitian ini bertujuan untuk menentukan upaya yang sesuai untuk peningkatan kadar klorofil dan karotenoid Nannochloropsis sp. menggunakan perlakuan sinar UV.  Rancangan penelitian melalui Rancangan Acak Lengkap (RAL) dengan tiga kali pengulangan. Perlakuan sinar UV yang diberikan meliputi 4 kelompok yaitu; 0 (kontrol), 10, 20, dan 30 menit. Pengamatan kualitas air pada media dan perhitungan kepadatan sel dilakukan setiap hari hingga masing-masing kultur mencapai fase stasioner untuk pemanenan. Kadar pigmen klorofil-a, b, dan karotenoid ditentukan menggunakan metode spektrofotometri dan diuji secara statistika melalui ANOVA One Way. Hasil penelitian didapatkan bahwa kepadatan sel tertinggi terdapat pada kelompok pemberian sinar UV 10 menit sebesar 1017,714x105 sel/mL pada fase stasioner hari ke-24. Kadar pigmen klorofil-a tertinggi pada kelompok sinar UV 20 menit, yaitu sebesar 108,46 µg/g berat basah, klorofil-b tertinggi pada kelompok UV 30 menit, yaitu sebesar 32,93 µg/g berat basah, dan karotenoid tertinggi pada kelompok UV 10 menit, yaitu sebesar 147,88 µg/g berat basah. Namun, berdasarkan uji statistika pemberian sinar UV sampai 30 menit tidak memberi pengaruh nyata (p≥0,05) terhadap kadar klorofil-a,b, dan karotenoid yang dihasilkan.  Nannochloropsis sp. is a phytoplankton with the ability to produce chlorophyll-a, b, and carotenoid pigments that are useful for photosynthesis. Pigment production of Nannochloropsis sp. is influenced mainly by the light factor. The treatment of UV light has the potential to stimulate phytoplankton cell growth and pigment production. This study aims to determine the appropriate efforts to increase levels of chlorophyll and carotenoids Nannochloropsis sp. using UV light treatment. The research design was through a completely randomized design (CRD) with three repetitions. UV light treatment given includes 4 levels, namely; 0 (control), 10, 20, and 30 minutes. Observation of media water quality and cell density calculations were carried out every day until each culture reached a stationary phase for harvesting. The levels of chlorophyll-a, b, and carotenoid pigments were determined using the spectrophotometric method and statistically tested through One Way ANOVA. The results showed that the highest cell density was found at the 10-minute UV light level of 1017,714x105 cells/mL on the stationary phase on the 24th day. The highest levels of chlorophyll-a were at the UV light level of 20 minutes, which was 108.46 µg/g wet weight, the highest chlorophyll-b was at the UV level of 30 minutes, which was 32.93 µg/g  wet weight, and the highest carotenoids were at the UV 10 level. minutes, which is 147.88 µg/g wet weight. However, based on statistical tests, UV light up to 30 minutes did not have a significant effect (p≥0.05) on the levels of chlorophyll-a, b, and carotenoids produced.

oai:ojs.ejournal.undip.ac.id:article/31554 2021-06-08T16:31:10Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/31554 2021-06-08T16:31:10Z Buletin Oseanografi Marina Vol 10, No 2 (2021): Buletin Oseanografi Marina; 162-170 Swandiko, Metrio; Departemen Oseanografi , Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Wirasatriya, Anindya; Departemen Oseanografi , Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Marwoto, Jarot; Departemen Oseanografi , Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Muslim, Muslim; Departemen Oseanografi , Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Indrayanti, Elis; Departemen Oseanografi , Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Subardjo, Petrus; Departemen Oseanografi , Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Ismunarti, Dwi Haryo; Departemen Oseanografi , Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2021-05-22 17:24:29 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/31554 Hot Event; SPL; Angin; Radiasi Matahari; Selat Malaka id Hot Event merupakan fenomena suhu permukaan laut (SPL) tinggi lebih dari 30°C dan memiliki mekanisme khusus dalam pembentukannya, yaitu kecepatan angin lemah dan radiasi matahari tinggi. Hot Event memiliki peran penting dalam menyumbang bahang pada pacific warm pool di Samudra Pasifik bagian barat dan berperan mengatur variasi iklim global. Indonesia sebagai negara kepulauan memiliki potensi besar melemahkan sirkulasi angin dan potensi kejadian Hot Event. Selat Malaka merupakan selat terpanjang di Indonesia dan berpotensi untuk menjadi area kajian Hot Event. Fenomena SPLtinggi (>30°C) dan konstan selama 13 tahun (2003 – 2015) di Selat Malaka merupakan hal unik untuk dikaji. Penelitian ini bertujuan untuk mengidentifikasi dan mengetahui mekanisme terjadinya SPL tinggi (>30°C) dan konstan selama 13 tahun (2013 - 2015) di Selat Malaka. Metode yang digunakan adalah metode kuantitatif. Data yang digunakan adalah data harian SPL, angin, arus permukaan, radiasi matahari selama 13 tahun serta batimetri. Pengolahan data menggunakan bahasa pemograman untuk memvisualisasi SPL tinggi >30°C, angin lemah <2 m/det, arus, radiasi matahari tinggi 200 W/m² serta data batimetri. Variasi SPL paling tinggi dan konstan terjadi pada musim timur (Agustus) dan paling rendah pada musim barat (Februari). Fenomena SPL tinggi dan konstan di wilayah kajian B terhadap kajian A dan C disebabkan lemahnya kecepatan angin <2 m/det di wilayah B dibandingkan wilayah A dan C, serta didukung dengan tingginya radiasi matahari dan batimetri wilayah kajian B yang relatif dangkal, sehingga proses pemanasan massa air lebih cepat dibandingkan wilayah kajian lainnya.  Hot Event is a phenomenon of high sea surface temperature (SST) over 30 °C and it has a unique mechanism in its formation by the lower wind speed and high solar radiation. Hot Event has an important role in contributing heat to the pacific warm pool in the western Pacific Ocean and play a role in regulating global climate variations. Indonesia as an archipelagic country has the potential to weaken wind circulation and potential Hot Event. The Malacca Strait is the longest strait in Indonesia and it is potential for Hot Events. The phenomenon of high SST (>30 °C) and constant for 13 years (2003 - 2015) in the Malacca Strait is unique to be studied. The present research aims to identify and determine the mechanism of the occurrence of high SST (>30 °C) and constant for 13 years (2013 - 2015). The method used in this study is quantitative method. The data used are daily data of SST, wind, surface currents, solar radiation for 13 years, and bathymetry. Programming was used to visualize high SST >30 °C, lower speed winds <2 m/s, currents, high solar radiation 200 W/m² also bathymetry data. The highest and constant variation of SST occurs in the east season (August) and the lowest in the west season (February). The phenomenon of high and stable SST in area B on A and C is due to the low wind speed <2 m/s in region B compared to A and C and it is supported by high solar radiation and shallow bathymetry in area B, so that the heating process of water mass is faster than other areas.

oai:ojs.ejournal.undip.ac.id:article/62368 2024-11-04T07:16:45Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/62368 2024-11-04T07:16:45Z Buletin Oseanografi Marina Vol 13, No 3 (2024): Buletin Oseanografi Marina; 448-463 Radjawane, Ivonne Milichristi; Kelompok Keahlian Oseanografi Lingkungan dan Terapan, Fakultas Ilmu dan Teknologi Kebumian, Institut Teknologi Bandung Program Studi Oseanografi, Fakultas Ilmu dan Teknologi Kebumian, Institut Teknologi Bandung Korea-Indonesia Marine Technology Cooperation Research Center, Institut Teknologi Bandung Yusarita, Alvi; Program Studi Oseanografi, Fakultas Ilmu dan Teknologi Kebumian, Institut Teknologi Bandung Kuswardani, Anastasia Rita Tisiana Dwi; Balai Besar Riset Sosial Ekonomi Kelautan dan Perikanan, Kementerian Kelautan dan Perikanan Napitupulu, Gandhi; Kelompok Keahlian Oseanografi Lingkungan dan Terapan, Fakultas Ilmu dan Teknologi Kebumian, Institut Teknologi Bandung Program Studi Oseanografi, Fakultas Ilmu dan Teknologi Kebumian, Institut Teknologi Bandung 2024-10-30 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/62368 Arus Ageostropik; Arus Geostropik; C-Vektor; Perairan selatan Jawa; Upwelling id Perairan selatan Jawa merupakan lokasi dengan fenomena upwelling yang signifikan. Penelitian bertujuan untuk memahami kecepatan dan pola arus geostropik serta ageostropik orde dua musiman dari permukaan hingga kedalaman 600 m. Nilai Ekman pumping velocity (EPV) yang dibangkitkan oleh angin menunjukkan upwelling mulai bulan Juni, mencapai puncaknya dari Juli hingga September, dan menurun mulai Oktober, hampir menghilang pada November. Nilai EPV antara perairan Jawa Barat dan Timur menunjukkan tingkat upwelling yang lebih tinggi di sebelah barat. Data CTD menegaskan bahwa upwelling terjadi selama musim Timur (Juni-Agustus), ditandai dengan penurunan suhu air, dangkalnya termoklin, dan peningkatan salinitas terhadap kedalaman. Pada musim barat (Desember-Februari), arus geostropik cenderung ke timur di sepanjang pantai Jawa Barat karena arus selatan Jawa (ASJ), sementara di selatan Jawa Tengah dan Jawa Timur, arah arus ke barat disebabkan oleh arus lintas Indonesia (Arlindo) dan arus ekuator selatan (AES). Pada musim timur, ASJ melemah, dan arah arus geostropik berubah ke barat, memperkuat ASJ dan Arlindo. Sirkulasi Sekunder Ageostropik, diperkirakan melalui metode C-Vektor, memainkan peran dalam pergerakan massa air vertikal, meningkatkan intensitas upwelling di perairan selatan Jawa. Wilayah sekitar Jawa Timur memiliki komponen C-Vektor positif yang berdampak pada peningkatan intensitas upwelling di daerah tersebut.   The southern waters of Java are a location with significant upwelling phenomena. The study aimed to understand the velocity and pattern of seasonal second-order geostropic and ageostropic currents from the surface to 600 m depth. Wind-generated Ekman pumping velocity (EPV) values show upwelling starting in June, peaking from July to September, and decreasing from October, almost disappearing in November.. The EPV values between western and eastern Java waters show higher levels of upwelling in the west. CTD data confirms that upwelling occurs during the East season (June-August), characterized by decreasing water temperature, shallow thermocline, and increasing salinity with depth. In the West season (December-February), geostropic currents tend to be eastward along the West Java coast due to the South Java Current (SJC), while south of Central Java and East Java, the current direction is westward due to the Indonesian Throughflow ( ITF ) and the South Equatorial Current (SEC). In the eastern season, the SJC weakens, and the direction of the geostropic current changes to the west, strengthening the SJC and ITF. The Ageostropic Secondary Circulation, estimated through the C-Vector method, plays a role in the vertical movement of water masses, increasing the intensity of upwelling in the waters south of Java. The region around East Java has a positive C-Vector component which has an impact on increasing the intensity of upwelling in that area.

oai:ojs.ejournal.undip.ac.id:article/15728 2020-04-17T12:02:39Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/15728 2020-04-17T12:02:39Z Buletin Oseanografi Marina Vol 5, No 2 (2016): Buletin Oseanografi Marina; 101-106 Suryono, Chrisna Adhi; Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro Rochaddi, Baskoro Irwani, Irwani 2016-10-09 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/15728 en Hasil penelitian menunjukkan bahwa air laut dari wilayah perairan paling barat Semarang telah terkontaminasi pestisida organoklorin.  Hasil tersebut menunjukkan bahwa konsentrasi yang tinggi ditemukan pada beberapa pestisida seperti Heptachlor, Aldrin, Endosulfan, Endrin, dan pp-DDT dengan nilai kisaran sebesar 0.319 ±0.231, 0.227±0.093, 0.119±0.080, 1.023±0.553, 0.906±0.005 ppb.  Bila dibandingkan dengan baku mutu dari Kementerian Lingkungan Hidup untuk kehidupan organisme laut dan wisata masih diketegorikan tinggi dan terkontaminasi pestisida organoklorin. Kata Kunci : órgano klorin, kontaminasi, Semarang

oai:ojs.ejournal.undip.ac.id:article/31312 2022-09-07T17:08:50Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/31312 2022-09-07T17:08:50Z Buletin Oseanografi Marina Vol 11, No 2 (2022): Buletin Oseanografi Marina; 149-155 Oktavia, Nadya; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Supriyantini, Endang; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Ridlo, Ali; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2022-05-20 08:04:54 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/31312 kitosan; adsorben; amoniak id Tumpahan minyak mentah di laut akan menimbulkan pencemaran karena memiliki kadar pencemar, salah satunya adalah amoniak. Kitosan merupakan biopolimer alami yang memiliki gugus aktif amina dan hidroksil yang dapat dibentuk sebagai adsorben amonia. Tujuan dari penelitian ini adalah untuk mengetahui efektivitas kitosan dalam menyerap amoniak dengan air tercemar minyak mentah di sungai Karawang. Cairan kitosan yang digunakan terdiri dari (kontrol, 0%); (A) 0,3%; (B) 0,6%; (C) 0,9%; (D) 1,2%. Variasi waktu pengadukan yang digunakan adalah 30 menit dan 60 menit dengan kecepatan pengadukan 200 rpm dengan 3 kali pengulangan. Hasil penelitian menunjukkan bahwa perlakuan dengan variasi konsentrasi kitosan tersebut dapat meningkatkan daya serap kadar amoniak. Penyerapan tertinggi pada waktu pengadukan 30 menit terdapat pada konsentrasi kitosan 0,3% yaitu sebesar 8,709 mg/L dengan daya serap 92, 293 %, dan penyerapan tertinggi pada waktu pengadukan 60 menit terdapat pada konsentrasi kitosan 0,3% yaitu sebesar 8,735 mg/L dengan daya serap 92,566%. Konsentrasi kitosan dan variasi waktu pengadukan yang digunakan dalam penelitian ini berpengaruh nyata terhadap kapasitas dan daya serap terhadap amoniak.  The spills of crude oil on the ocean will cause pollution because it has pollutant levels, one of them is ammonia. Chitosan is a natural biopolymer which has got active group of amine and hydroxyl , they  can be formed as ammonia adsorbents. The purpose of this research is to find out the effectiveness of chitosan in absorbing the ammonia with crude oil contamined water in Karawang river. The liquid  of chitosan which is used consists of (Control, 0%); (A) 0.3%; (B) 0.6%; (C) 0.9%; (D) 1.2%. The variation of Stirring time that is used was 30 minutes and 60 minutes with a stirring speed of 200 rpm with 3 repetitions. The results showed that the treatment with those variation in the concentration of chitosan can increase the absorption capacity of ammonia levels. The highest absorption at the stirring time of 30 minutes was found at the concentration of 0,3 %,which was 8,709 mg/L with an absorption capacity of 92,293 %, while the highest absorption  at the stirring time of 60 minutes was found at the concentration of 0.3% chitosan which was 8,735 mg/L with 92,566 % absorption. The concentration of chitosan and the variation of stirring time used in this study significantly affected the capacity and absorption of ammonia.

oai:ojs.ejournal.undip.ac.id:article/2986 2012-04-03T06:10:25Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/2986 2012-04-03T06:10:25Z Buletin Oseanografi Marina Vol 1, No 1 (2011): Buletin Oseanografi Marina Hariyadi, Hariyadi The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/2986 en Abstract  Live Environment Mining and Energy Duty Kabupaten Jepara (2006) said Teluk Awur shore is potential area occurred erosion. Reliable attempted to use preventing the problem is protecting with making hard struktur, therefore investigated with modeling shoreline changed use protection structure added three scenarios. The purpose of this study to known shoreline changed and the smallest effect in the scenario of protection structure added. For the efficiency time and price, so that prediction and simulation is done with using numeric model method with GENESIS (GENEralized model for SImulating Shoreline change). GENESIS is the one of subprogram in the NEMOS(Nearshore Evolution MOdeling System) at the CEDAS (Coastal Engineering Design and Analisys System) software. Long of the model simulation area is 8720 meters. Model simulation use three scenarios are Detached Breakwater, Non Diffracting Groin, and Detached Breakwater and combination of Non Diffracting Groin. and Detached Breakwater. Shoreline changed can consider based on simulation result is sediment transport volume, erosion wide, sedimentation and long shoreline changed. Based on result simulation, shoreline changed in existing condition is the most if compared with the other scenario with values-93.5942 meters, the smallest values occurred at the combination scenario from Detached Breakwater and Non Diffracting Groin with -54.3157 meters. This result give the information that protection structure required to decrease shoreline changed occur.   Key Words: Shoreline Change, CEDAS, NEMOS, GENESIS, Teluk Awur, Detached Breakwater, Non Diffracting Groin   

oai:ojs.ejournal.undip.ac.id:article/67069 2026-02-11T04:49:13Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/67069 2026-02-11T04:49:13Z Buletin Oseanografi Marina Vol 14, No 2 (2025): Buletin Oseanografi Marina; 322-334 Maulana, Refaldi Rizky; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Rochaddi, Baskoro; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Wijaya, Yusuf Jati; Departemen Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2025-06-10 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/67069 Kenaikan permukaan laut; Long Short-Term Memory; hyperparameter tuning; perairan Jepara id Perubahan iklim global telah menyebabkan kenaikan permukaan laut yang signifikan, yang mengancam negara kepulauan seperti Indonesia. Penelitian ini berfokus pada wilayah Jepara, Jawa Tengah, yang berbatasan dengan Laut Jawa dan rentan terhadap kenaikan permukaan laut. Penelitian ini bertujuan untuk menganalisis dan mencari hubungan antara pasang surut dan Sea Level Anomaly (SLA), serta mengevaluasi model Long Short-Term Memory (LSTM) dalam memprediksi data SLA di Jepara. Penelitian ini menggunakan data SLA komponen Delayed Time (DT) dan Near-Real Time (NRT) dari Copernicus Marine Environment Monitoring Service (CMEMS) dan data pasang surut dari Badan Informasi Geospasial (BIG). Hasil analisis menunjukkan bahwa pasang surut di perairan Jepara cenderung bersifat campuran condong ke harian tunggal. Hasil korelasi Pearson yang linear positif yang kuat dan koefisien determinasi sebesar 52,01% pada dataset komponen DT dengan 4 titik pengamatan di perairan Jepara menunjukkan bahwa peningkatan SLA berhubungan dengan peningkatan pasang surut, di mana SLA menjelaskan 52,01% variasi pasang surut. Tren kenaikan SLA dari tahun 1993 hingga 2023 menunjukkan rata-rata kenaikan permukaan laut sebesar 4,794 mm/tahun, dengan puncak tertinggi pada tahun 2022. Model LSTM dengan 2 hidden layers, 100 epochs, 100 hidden units, dan dropout rate 0,1 menunjukkan kinerja yang baik dalam memprediksi data SLA, dengan MAE sebesar 2,3776, RMSE 3,0389, dan MAPE 17%. Hasil evaluasi tersebut menunjukkan nilai error yang kecil, sehingga dapat disimpulkan bahwa model LSTM memiliki performa yang baik dalam memprediksi kenaikan permukaan laut.  Global climate change has caused significant sea level rise, which threatens archipelagic countries like Indonesia. This research focuses on the Jepara region in Central Java, which borders the Java Sea and is vulnerable to rising sea levels. The study aims to analyze and identify the relationship between tides and Sea Level Anomaly (SLA), and evaluate the Long Short-Term Memory (LSTM) model in predicting SLA data in Jepara. The research uses Delayed Time (DT) and Near-Real Time (NRT) SLA data from the Copernicus Marine Environment Monitoring Service (CMEMS) and tidal data from Badan Informasi Geospasial (BIG). The results of the analysis show that the tides in Jepara waters tend to be mixed tide prevailing diurnal. The strong positive linear Pearson correlation and a 52.01% coefficient of determination in the DT component dataset with 4 observation points in Jepara waters indicate that the increase in SLA is related to the increase in tides, where SLA explains 52.01% of the tidal variation. The SLA trend from 1993 to 2023 shows an average sea level rise of 4,794 mm/year, with the maximum height in 2022. The LSTM model with 2 hidden layers, 100 epochs, 100 hidden units, and a dropout rate of 0.1 demonstrated good performance in predicting SLA data, with an MAE of 2.3776, RMSE of 3.0389, and MAPE of 17%. These results indicate that the LSTM model performs well in predicting sea level rise.

oai:ojs.ejournal.undip.ac.id:article/19042 2020-04-17T12:05:47Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/19042 2020-04-17T12:05:47Z Buletin Oseanografi Marina Vol 7, No 1 (2018): Buletin Oseanografi Marina; 51-58 Pamungkas, Aditya; Bangka Belitung University 2018-05-24 17:39:40 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/19042 Oceanography parameters; Bangka Sea; Kelabat Bay; Sadai Strait; oseanografi; Perairan Bangka; Teluk Kelabat; Selat Sadai en Perairan di Provinsi Kepulauan Bangka Belitung merupakan perairan yang terletak di Selat Karimata. Di sebelah utara Pulau Bangka, terdapat perairan Teluk Kelabat yang berhadapan dengan Laut Natuna. Sebaliknya, Selat Sadai terletak di sebelah selatan Pulau Bangka dan berhadapan langsung dengan Laut Jawa. Penelitian ini bertujuan untuk mengetaui karakteristik parameter oseanografi di perairan tersebut yang meliputi kondisi pasang-surut, arus, dan gelombang. Data yang dipergunakan untuk menganalisis ketiga parameter oseanografi tersebut diperoleh dari Badan Informasi Geospasial (BIG). Penelitian ini akan menfokuskan pada kondisi oseanografi pada musim timur (Juli 2017) dan musim barat (Januari 2018).  Hasil analisis menunjukan pasang-surut di kedua perairan tersebut bertipe diurnal dengan kategori makro-tidal di Teluk Kelabat dan meso-tidal di Selat Sadai dengan tunggang pasang surut masing-masing 3m dan 2,5m. Selanjutnya, arah arus di perairan Teluk Kelabat dan Selat Sadai mempunyai pola yang mengikuti arah angin di tiap musimnya dan kecepatannya cenderung lebih tinggi di musim barat. Kecepatan arus berkisar antara 0.2–0.3 m/det. Untuk karakteristik gelombang, tinggi gelombang signifikan di perairan utara Pulau Bangka (Teluk Kelabat) cenderung lebih besar yaitu berkisar antara 0.1-0.5 m. Sedangkan perairan selatan Pulau Bangka (Selat Sadai) tinggi gelombang berkisar antara 0.1-0.3 m. Tinggi gelombang cenderung lebih besar ketika musim barat dibandingkan ketika musim timur.  Bangka Belitung seas is located in the Karimata Strait. In the North of Bangka Island, there are Kelabat Bay that the Natuna Sea was confronted with. Instead, Sadai Strait is located at  south Bangka Island and dealing directly with the Java Sea. This study will compare the oceanographic characteristics in both region which include tidal conditions, currents, and waves. The data are used to analyze the third oceanographic parameters obtained from the Badan Informasi Geospasial  (BIG). In this research will be focusing on the oceanographic conditions in the east monsoon (July 2017) and west monsoon (January 2018). The results of this research shows the tides in both the waters of diurnal with the category macro-tidal at the Kelabat Bay and meso-tidal at Strait Sadai with the tidal range are 3m and 2,5m . Furthermore, the direction of the currents in the waters of Kelabat Bay and Strait Sadai will follow the wind direction in every season and tends to be higher at west monsoon with the current veolcity around 0.2-0.3 m/s. For the wave characteristics, significant wave height in north seas of the Bangka Island (Kelabat Bay) tend to be larger, around 0.1-0.5m when compared with south seas of Bangka Island (Sadai Strait) around 0.1-0.3m and tend to be higher when west monsoon than east monsoon.

oai:ojs.ejournal.undip.ac.id:article/46458 2023-05-13T09:22:51Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/46458 2023-05-13T09:22:51Z Buletin Oseanografi Marina Vol 12, No 1 (2023): Buletin Oseanografi Marina; 98-108 Anggarwati, An Nisa Nur Hera; Program Studi Ilmu Lingkungan, Minat Geoinformasi untuk Manajemen Bencana, Universitas Gadjah Mada Mardiatno, Djati; Program Studi Geografi Lingkungan, Departemen Geografi Lingkungan, Universitas Gadjah Mada Pusat Studi Bencana (PSBA) dan Beragam Kajian Bencana akibat Perubahan Iklim, Universitas Gadjah Mada Mei, Estuning Tyas Wulan; Program Studi Pembangunan Wilayah, Departemen Geografi Pembangunan, Universitas Gadjah Mada 2023-02-04 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/46458 Tsunami; Jalur Evakuasi; Pemodelan SIG; Evaluasi id Bencana tsunami menyebabkan kerusakan dan korban jiwa. Pencegahan dan pengurangan risiko bencana tsunami dapat dilakukan dengan pembuatan jalur evakuasi. Perkembangan teknologi dan sistem informasi geografis (SIG) memberikan pemodelan jalur evakuasi untuk mitigasi bencana tsunami. Tujuan penelitian yaitu menganalisis hasil pemodelan jalur tsunami dengan metode Least Cost Distace berbasis raster dan Network Analysis berbasis data vektor dan melakukan evaluasi dengan melibatkan masyarakat. Penelitian dengan pendekatan eksplanatoris sekuensial, metode analisis data kuantitatif pada tahap pertama yang diikuti oleh pengumpulan dan analisis data kualitatif pada tahap kedua yang dibangun berdasarkan hasil awal kuantitatif. Penelitian menggunakan data primer berupa citra spot 7 yang dideliniasi sesuai Landuse dan dianalisis dengan 2 metode pemodelan jalur evakuasi. Hasil analisis di validasi dengan data sekunder berupa data lapangan melalui wawancara mendalam kepada narasumber meliputi pedagang, wisatawan maupun masyarakat local yang sedang beraktivitas di sekitar pantai serta kondisi jalur evakuasi sebenarnya. Metode pemodelan jalur evakuasi menggunakan 2 metode memperlihatkan hasil pemodelan jalur evakuasi menggunakan data vektor melalui Network Analysis dan data raster melalui Least Cost Distance (LCD) tidak selamanya menghasilkan rute yang berbeda. Perbedaan hasil dipengaruhi oleh faktor topografi, lereng, hambatan dan penghalang jalan. Hasil evaluasi kedua jalur evakuasi yang dilakukan kepada para informan menunjukkan bahwa kejenuhan narasumber lebih memahami jalur evakuasi yang dibuat dengan pemodelan Network Analysis. Hal ini dikarenakan jalur evakuasi tersebut tidak jauh berbeda dengan kondisi eksisting di lapangan yang sudah dibuat dan disusun oleh BPBD Yogyakarta.   The tsunami disaster caused damage and loss of life. Prevention and reduction of tsunami disaster risk can be done by making evacuation routes. The development of technology and geographic information systems (GIS) provides modeling of evacuation routes for tsunami disaster mitigation. The research objectives are to analyze the results of the tsunami path modeling using the raster-based Least Cost Distace method and the vector data-based Network Analysis and to conduct an evaluation involving the community. Research with a sequential explanatory approach, quantitative data analysis method in the first stage followed by qualitative data collection and analysis in the second stage which was built based on the initial quantitative results. This study uses primary data in the form of spot 7 images which are delineated according to Landuse and analyzed by 2 evacuation route modeling methods. The results of the analysis were validated by field data through in-depth interviews with informants including traders, tourists and local people who were doing activities around the beach. Evacuation route modeling method using 2 methods shows the results of evacuation route modeling using vector data through Network Analysis and raster data through Least Cost Distance (LCD) do not always produce different routes. Differences in results are influenced by topography, slopes, obstacles and roadblocks. The results of the evaluation of the two evacuation routes carried out to the informants showed that the saturation of the informants better understood the evacuation routes made with Network Analysis modeling. This is because the evacuation route is not much different from the existing conditions in the field that have been made and compiled by BPBD Yogyakarta.

oai:ojs.ejournal.undip.ac.id:article/6932 2014-05-21T02:37:18Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6932 2014-05-21T02:37:18Z Buletin Oseanografi Marina Vol 2, No 2 (2013): Buletin Oseanografi Marina; 16-23 Irwani, Irwani; PS. Ilmu Kelautan, Jur. Ilmu Kelautan FPIK UNDIP Ridlo, Ali; PS. Ilmu Kelautan, Jur. Ilmu Kelautan FPIK UNDIP Widianingsih, Widianingsih; PS. Ilmu Kelautan, Jur. Ilmu Kelautan FPIK UNDIP 2013-04-18 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6932 en Potensi mikroalgae Indonesia untuk dikembangkan sebagai sumber biodiesel sangat besar. Hal ini didasarkan atas luas wilayah perairan Indonesia yang sangat luas dengan kharakteristik geografis dan ekosistem laut yang beragam. Mikroalgae Porphyridium cruentum memiliki potensi yang besar untuk dikembangkan menjadi biodiesel.  Perlakuan komposisi nutrien fosfat dan nitrat meliputi (a) Nutrien Kontrol merupakan nutrien dengan media Conway;(b) Nutrien A (fosfat dan nitrat 75 % dari nutrien kontrol); (c) Nutrien B (fosfat dan nitrat 50 % dari nutrien kontrol) ; dan (d) Nutrien C (fosfat dan nitrat 25 % dari nutrien kontrol).  Perlakukan Fotoperiod meliputi perlakuan 4 jam terang-20 jam gelap; 8 jam terang- 16 jam gelap; 12 jam terang dan 12 jam gelap serta perlakukan 24 jam terang.  Perlakuan dilakukan dengan tiga kali ulangan. Volume media kultur untuk setiap perlakuan 250 mL dengan sistem aerasi dan pencahayaan (3000 lux) yang kontinyu. Porphyridium cruentum memiliki total lipid yang tinggi pada fotoperiod  24 jam terang (43,6 %-dw) dan pada perlakuan nutrient C (PO42-) sebesar 0,033 gr mol/L dan NO3- sebesar 0,21 gr mol/L) yaitu sebesar  50,05 %-dw. Kata Kunci: Mikroalga, Porphyridium cruentum, Fotoperiod dan Nutrien.

oai:ojs.ejournal.undip.ac.id:article/29065 2020-09-27T10:49:01Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/29065 2020-09-27T10:49:01Z Buletin Oseanografi Marina Vol 9, No 1 (2020): Buletin Oseanografi Marina; 37-44 Indrayanti, Elis; Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Wijayanti, Diah Permata; Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Siagian, Hendry Syahputra Ropinus; Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2020-04-30 08:00:13 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/29065 Pulau Cilik; Karimunjawa; ADCP; pasang surut; arus laut; gelombang id Pulau Cilik merupakan gugusan pulau di Karimunjawa yang menjadi salah satu destinasi wisata bahari di Indonesia. Perairan ini kaya akan terumbu karang dan ikan berwarna-warni dengan  tutupan karang hidup yang masih tinggi. Proses hidrodinamika seperti pasang surut, arus laut dan gelombang laut secara langsung maupun tidak langsung berpengaruh terhadap kondisi terumbu karang, oleh karena itu penelitian ini perlu dilakukan. Tujuan penelitian adalah untuk mengetahui karakteristik pasang surut, arus laut dan gelombang berdasarkan data pengukuran Acoustic Doppler Current Profiler (ADCP) di Perairan Pulau Cilik, Karimunjawa. Pengukuran dilaksanakan selama 7x24 jam dengan interval waktu 600 dt dan sample rate 300 dt. Posisi ADCP pada -5.8177°S  dan 110.5096°E. Kedalaman total pengukuran 14 m dengan kedalaman aktif pengukuran 12 m, yang terbagi menjadi 6 lapisan kedalaman yaitu 2 m, 4 m, 6 m, 8 m, 10 m, dan 12 m.  Hasil pengukuran menunjukkan bahwa Perairan Pulau Cilik, Karimunjawa memiliki tipe pasang surut campuran condong harian tunggal dengan nilai formzahl sebesar 2.55. Kecepatan arus bervariasi dengan rata-rata pada seluruh lapisan antara 5.57–6.35 cm/dt, sedangkan arahnya bi-directional yaitu memiliki dua muka arah (timur dan barat-barat daya). Tinggi dan periode gelombang yang didapatkan pada saat pengamatan relatif kecil. Cilik Island Waters in Karimunjawa is one of the marine tourism destinations in Indonesia. These waters are rich in coral reefs and colorful fish with high live coral cover. Hydrodynamic processes as tides, ocean currents, and waves influence the performance of coral reef through direct or indirect effects. Therefore this research needs to be done. The purpose of this study was to determine the characteristics of tides, ocean currents, and waves based on Acoustic Doppler Current Profiler (ADCP) measurement data in Cilik Island Waters, Karimunjawa. Measurements were carried out for 7 x 24 hours (2 April 2017 - 9 April 2017) with a time interval of 600 s and a sample rate of 300 s. The ADCP position is -5.8177 ° S and 110.5096 ° E. The total depth is 14 m with an actual measurement depth of 12 m, which is divided into 6 layers of depth namely 2 m, 4 m, 6 m, 8 m, 10 m, and 12 m. Result shown that  Cilik Island, Karimunjawa, have a single mixed daily tidal type with a formzahl value of 2.55. Current velocity varies with the average in all layers between 5.57-6.35 cm/s, while the direction is bi-directional, which has two faces (east and west-southwest). The height and wave period obtained at the time of observation are relatively small. 

oai:ojs.ejournal.undip.ac.id:article/51455 2023-11-04T02:49:24Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/51455 2023-11-04T02:49:24Z Buletin Oseanografi Marina Vol 12, No 3 (2023): Buletin Oseanografi Marina; 433-446 Ayasy, Muhammad Farras; OceanographyDepartement, Faculty of Fisheries and Marine Science, Universitas Diponegoro Center for Coastal Rehabilitation and Disaster Mitigation Studies, Universitas Diponegoro Helmi, Muhammad; OceanographyDepartement, Faculty of Fisheries and Marine Science, Universitas Diponegoro Center for Coastal Rehabilitation and Disaster Mitigation Studies, Universitas Diponegoro Zainuri, Muhammad; OceanographyDepartement, Faculty of Fisheries and Marine Science, Universitas Diponegoro Center for Coastal Rehabilitation and Disaster Mitigation Studies, Universitas Diponegoro Kunarso, Kunarso; OceanographyDepartement, Faculty of Fisheries and Marine Science, Universitas Diponegoro Rochaddi, Baskoro; OceanographyDepartement, Faculty of Fisheries and Marine Science, Universitas Diponegoro 2023-10-01 08:51:26 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/51455 Shoreline Dynamic; Shoreline Prediction; DSAS; Land Use; Geospatial Analyst en Shoreline in Pekalongan has changed and impacted land use significantly. This research investigates historical changes in shoreline dynamics and their impact on land use from 2003–2021. This research also examines the trend of shoreline prediction for 2031–2041. Multitemporal SPOT5 and SPOT6 satellite images were used as primer data to detect shoreline and land use changes. The DSAS (Digital Shoreline Analysis System)  analyzes the shoreline change and generates shoreline prediction. This research shows that the coastal areas of Pekalongan have been impacted by erosion, with 528.08 hectares of area and 56.33 hectares of accretion. The North Pekalongan sub-district is the worst area hit by erosion. The shoreline has retreated 2405.8 meters with a 353.3 m/year erosion rate. Several areas of land use were heavily affected by erosion trends, such as ponds, rice fields, and open land. Shoreline predictions generated by DSAS were heavily reliant on historical rates of shoreline change dynamics. The predicted area of the shoreline is estimated to retreat 49.9–466.2 meters from the existing position in the next 10 and 20 years. This research is expected to provide information to local governments for evaluating the maintenance and development planning of the coastal area

oai:ojs.ejournal.undip.ac.id:article/32691 2021-02-01T08:06:52Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/32691 2021-02-01T08:06:52Z Buletin Oseanografi Marina Vol 10, No 1 (2021): Buletin Oseanografi Marina; 1-12 Lubis, Ashar Muda; Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Bengkulu Sari, Nanda; Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Bengkulu Sinaga, Juhendi; Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Bengkulu Hasanudin, M.; Pusat Penelitian Oseanografi, Lembaga Ilmu Pengetahuan Indonesia Kusmanto, Edi; Pusat Penelitian Oseanografi, Lembaga Ilmu Pengetahuan Indonesia 2021-02-01 10:08:03 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/32691 Morfologi; Batimetri; Kemiringan; Single Beam Echosounder id Daerah Pantai Pasir Palik, Bengkulu Utara merupakan salah satu daerah dengan tingkat abrasi yang tinggi. Salah satu faktor pemicu cepatnya laju abrasi adalah morfologi dasar laut yang mempengaruhi tinggi gelombang yang sampai ke pantai. Tujuan penelitian ini untuk mengetahui bentuk morfologi dasar laut di daerah Pantai Pasar Palik dengan survey batimetri dan membandingkannya dengan data batimetri dari Badan Informasi Geospasial (BIG) resolusi 25 m, Earth Topography 1-Arc Minute Gird (ETOPO1) dengan resolusi 1850 m dan General Bathymetric Chart of the Ocean (GEBCO) resolusi 450 m dan 900 m. Pengambilan data dilakukan dengan pemeruman menggunakan Single Beam Echosounder danGlobal Positioning System (GPS). Koreksi pasang surut dilakukan dengan bantuan perangkat lunakwxtide4.7. Hasil penelitiaan menunjukkan pada pengukuran Echosounderkedalaman maksimum mencapai10 m, sedangkan data BIG maksimum 8 m, GEBCO 450 m mencapai 55 m, GEBCO 900 m mencapai 32 m sedangkan ETOPO1 hanya 2,67 m. Kemiringan morfologi dasar laut dikategorikan landai dengan nilai kemiringan 0,32˚. Morfologi bawah laut di daerah pantai dapat dipengaruhi oleh faktor hidrografi dan oseanografi, maka penelitian lanjutan sangat diperlukan untuk melihat dinamika perubahan morfologi dasar laut. The Palik Coast area, North Bengkulu, is one of the area with high level of abrasion. One of the factors triggering the rapid rate of abrasion is the seabed morphology which affects the height wave energy near the coast. The purpose of this study was to determine the seabed morphology based on slope of seabed in Pasar Palik coast area with bathymetry survey, and also to compare the result with other bathymetry data; the BIG with resolution of 25 m, ETOPO1 with resolution of 1850 m and GEBCO resolution of 450 m and 900 m. The research was carried out by measuring bathymetry using Single Beam Echosounder and GPS. Tidal correction was conducted by using wxtide4.7 software. The result shows that the maximum depth reaches 10 m while the BIG data has the maximum depth of 8 m.Maximum depth  from GEBCO, GEBCO 900 m, ETOPO1 data is 55 m, 32 m and 2.67 m respectively. The slope of the seabed morphology is categorized as as declivous with a slope value of 0.32˚. Morphology in coastal areas can be influenced hydrography dan oceanography factors, further research is needed to better understand the dynamics of morphology changes.

oai:ojs.ejournal.undip.ac.id:article/63526 2024-11-04T07:16:45Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/63526 2024-11-04T07:16:45Z Buletin Oseanografi Marina Vol 13, No 3 (2024): Buletin Oseanografi Marina; 351-362 Andini, Ardita Dwisepti; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Mulawarman Paputungan, Mohammad Sumiran; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Mulawarman Suryana, Irma; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Mulawarman Ritonga, Irwan Ramadhan; Program Studi Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Mulawarman Laboratory of Oceanography and Engineering, Integrated Laboratory, Universitas Mulawarman 2024-10-30 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/63526 Dewasa; Anak-anak; Kadmium; Kerang; Samarinda Id Kerang darah (Anadara granosa) merupakan salah satu organisme laut yang dimanfaatkan masyarakat kota Samarinda sebagai sumber nutrien. Disisi lain, A. granosa dapat mengakumulasi logam Cd yang berisiko terhadap kesehatan manusia. Penelitian ini bertujuan untuk menentukan konsentrasi Cd, mengevaluasi hubungan antara Cd dan panjang dan berat, mengkaji dan menganalisis potensi risiko kesehatan dari konsumsi daging A. Granosa. Sampel A. granosa dengan ukuran yang berbeda dibeli dan dikumpulkan dari beberapa pasar tradisional di Kota Samarinda. Proses destruksi dilakukan dengan metode asam dan konsentrasi logam Cd ditentukan dengan spektrometer serapan atom dan dinyatakan dalam µg/g berat basah. Penetapan kajian risiko kesehatan dari logam Cd pada tubuh manusia dihitung menggunakan rumus Perkiraan Asupan Mingguan (EWI), Target Bahaya (HQ) dan Risiko Kanker (TR). Ditemukan konsentrasi Cd pada daging A, granosa berkisar 0,02-16,6 µg/g dengan rerata 5,59±5,10 µg/g. Konsentrasi Cd pada A. granosa dipengaruhi aktifitas manusia secara internal seperti perikanan, pertanian, eksplorasi minyak dan gas serta masukan limbah eksternal melalui aliran sungai. Kajian risiko kesehatan menunjukkan bahwa nilai estimasi asupan mingguan (EWI) pada A. granosa pada orang dewasa dan anak – anak lebih rendah dari nilai asupan mingguan sementara yang dapat ditoleransi (PTWI) dengan nilai 7 µg/kg berat badan perhari. Semua nilai target bahaya (HQ) jauh lebih rendah dari satu. Kemudian, potensi kanker (TR) baik pada orang dewasa dan anak – anak adalah berisiko lemah (≤ 10−6).  Blood cockles (Anadara granosa) are one of the seafood used by the people of Samarinda City as a source of nutrients. On the other hand, A. granosa could accumulate Cd metal which is a risk to human health. This study aimed to determine Cd concentrations, evaluate the relationship between Cd and length and weight, assess and analyze potential health risks from consuming A. granosa. Samples of A. granosa with different sizes were purchased and collected from several traditional markets in Samarinda City. The digestion process was carried out using the acid method and the Cd metal concentration was determined using an atomic absorption spectrometer and expressed in µg/g wet weight. Determination of the health risk assessment of Cd metal in the human body was calculated using the Estimated Weekly Intake (EWI), Hazard Quotient (HQ) and Cancer Risk (TR) formulas. It was found that the Cd concentration in flesh A, granosa ranged from 0.02 to 16.6 µg/g with an average of 5.59±5.10 µg/g. Cd concentrations in A. granosa are influenced by internal human activities such as fishing, agriculture, oil and gas exploration as well as external waste input through river flows. Health risk studies show that the estimated weekly intake (EWI) value of A. granosa in adults and children was lower than the tolerable temporary weekly intake (PTWI) value of 7 µg/kg body weight per day. All target hazard (HQ) values were much lower than one. Then, the potential for cancer (TR) in both adults and children was at low risk (≤ 10−6).

oai:ojs.ejournal.undip.ac.id:article/11293 2020-04-17T12:01:40Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/11293 2020-04-17T12:01:40Z Buletin Oseanografi Marina Vol 5, No 1 (2016): Buletin Oseanografi Marina; 31-37 Utami, Tri Mita Restu; Program Studi Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Maslukah, Lilik; Program Studi Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Yusuf, Muh; Program Studi Oseanografi, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2016-04-03 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/11293 en Perairan Karangsong mendapat pengaruh sangat besar dari aktivitas manusia yang berada di sepanjang maupun di hulu kawasan perairan tersebut. Aktivitas yang ada meliputi aktivitas rumah tangga, industri, tambak, lalu lintas kapal dan vegetasi mangrove. Padatnya aktivitas manusia tersebut dapat menyebabkan menurunnya kualitas perairan dan berpengaruh terhadap konsentrasi zat hara di perairan Karangsong. Tujuan penelitian ini adalah untuk mengetahui konsentrasi dan pola sebaran nitrat dan fosfat di perairan Karangsong, Kabupaten Indramayu. Penelitian ini dilaksanakan pada bulan Agustus 2015, dengan menggunakan metode kuantitatif dan untuk penentuan lokasi pengambilan sampel air menggunakan metode purposive sampling. Data yang dikaji adalah konsentrasi nitrat dan fosfat, suhu, oksigen terlarut, salinitas, kecerahan, pH dan arus permukaan. Untuk menggambarkan pola sebaran nitrat dan fosfat serta pola arus menggunakan softwareArcGIS 10.0. Hasil penelitian menunjukkan bahwa konsentrasi nitrat berkisar 0,4148–2,4541 mgL-1 dan konsentrasi fosfat berkisar 0,0253 – 0,6261 mgL-1. Pola sebaran konsentrasi nitrat dan fosfat mengikuti pola arah arus yang terjadi yaitu ke arah Timur Laut. Kata kunci: Sebaran, Nitrat, Fosfat, Perairan Karangsong

oai:ojs.ejournal.undip.ac.id:article/31698 2022-05-20T01:15:04Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/31698 2022-05-20T01:15:04Z Buletin Oseanografi Marina Vol 11, No 1 (2022): Buletin Oseanografi Marina; 59-70 Prasetyo, Linggar Dirgantara; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Supriyantini, Endang; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Sedjati, Sri; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2022-01-30 16:19:37 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/31698 Chaetoceros calcitrans, growth, light intensity id Chaetoceros calcitrans can be used for natural food in aquaculture. Microalgae growth is influenced by several factors, one of which is light intensity. This study aims to determine the intensity of light that can produce the best growth in C. calcitrans microalgae. The study design used was a completely randomized design (CRD) with two replications. This study uses a treatment (light intensity) with  four levels of treatment, namely 1000 (control), 1500, 2000 and 2500 lux with a duration of lighting 12 hours light: 12 hours dark. Calculation of density and measurement of water quality parameters are carried out every day during the cultivation process. Harvesting is done in a stationary phase. The results showed that different light intensities affected the growth of C. calcitrans microalgae (p=0,000). Light intensity of 2500 lux in medium scale C. calcitrans (60 L) culture can produce the highest growth on the tenth day which is 67x10⁵ cells/ml and biomass 13,75 grams.Chaetoceros calcitrans merupakan mikroalga yang dapat digunakan sebagai pakan alami. Pertumbuhan mikroalga dipengaruhi oleh beberapa faktor, salah satunya adalah intensitas cahaya. Penelitian ini bertujuan untuk mengetahui intensitas cahaya yang dapat menghasilkan pertumbuhan terbaik pada mikroalga C. calcitrans. Rancangan penelitian yang digunakan adalah rancangan acak lengkap (RAL) dengan dua kali pengulangan. Penelitian ini menggunakan  perlakuan (intensitas cahaya) dengan empat taraf perlakuan yaitu 1000 (kontrol), 1500, 2000 dan 2500 lux dengan durasi pencahayaan 12 terang : 12 gelap. Perhitungan kepadatan dan pengukuran parameter kualitas air dilakukan setiap hari selama proses kultivasi. Pemanenan dilakukan pada fase stasioner. Hasil penelitian menunjukkan bahwa intensitas cahaya yang berbeda mempengaruhi pertumbuhan mikroalga C. calcitrans (p=0,000). Intensitas cahaya 2500 lux pada kultur C. calcitrans skala medium (60 L) dapat menghasilkan pertumbuhan tertinggi pada hari ke sepuluh yaitu 67 x 105 sel/ml dan biomasa kering 13,75 gram.

oai:ojs.ejournal.undip.ac.id:article/66602 2026-02-11T04:49:13Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/66602 2026-02-11T04:49:13Z Buletin Oseanografi Marina Vol 14, No 2 (2025): Buletin Oseanografi Marina; 223-230 Umar, Olpin; Mahasiswa Magister Program Studi Ilmu Kelautan, Pascasarjana, Universitas Negeri Gorontalo Hamzah, Sri Nuryatin; Program Studi Ilmu Kelautan, Fakultas Kelautan dan Teknologi Perikanan, Universitas Negeri Gorontalo Hamzah, Sri Nuryatin; Program Studi Ilmu Kelautan, Fakultas Kelautan dan Teknologi Perikanan, Universitas Negeri Gorontalo Hasim, Hasim; Program Studi Doktor Ilmu Lingkungan, Pascasarjana, Universitas Negeri Gorontalo Hasim, Hasim; Program Studi Doktor Ilmu Lingkungan, Pascasarjana, Universitas Negeri Gorontalo 2025-06-10 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/66602 ekologi; lamun; konservasi; Biluhu Timur id Lamun merupakan salah satu ekosistem penting, karena menyediakan berbagai layanan ekosistem yang mendukung kehidupan di pesisir dan laut. Penelitian ini bertujuan untuk mengetahui pengelolaan ekosistem lamun dengan pendekatan sistem ekologi di perairan Biluhu Timur yang telah ditetapkan sebagai Kawasan Konservasi Perairan Daerah (KKPD) sejak tahun 2023. Penelitian dilaksanakan pada bulan Agustus-September tahun 2024. Sebanyak empat stasiun penelitian ditetapkan berdasarkan metode purposive sampling. Pengambilan sampel lamun menggunakan metode Seagrass Net dengan kuadran ukuran 50 x 50 cm. Analisis data pada penelitian ini meliputi analisis frekuensi kehadiran, kerapatan jenis dan persen tutupan. Hasil penelitian menunjukkan  bahwa jenis lamun yang ditemukan di KKPD Biluhu Timur sebanyak 10 jenis yaitu Enhalus acoroides, Cymodocea serrulata, Cymodocea rotundata, Halophila decipiens, Halophila ovalis, Halodule pinifolia, Halodule uninervis, Syringodium isoetifolium, Thalassodendron ciliatum, dan Thalassia hemprichii. Hasil analisis kerapatan lamun tertinggi di KKPD Biluhu Timur yakni jenis lamun Cymodocea rotundata dengan nilai 677,53 ind/m2 dan kerapatan terendah pada jenis Halophila decipiens dengan nilai 15.00 ind/m2. Frekunesi kehadiran tertinggi yakni pada jenis Cymodocea rotundata dan frekuensi kehadiran terendah pada jenis Halophila decipiens . Hasil analisis persen tutupan sebesar 54,64% menunjukkan bahwa kondisi lamun di KKPD Biluhu termasuk dalam kategori /kurang sehat.    Seagrass is one of the essential ecosystems, as it provides various ecosystem services that support coastal and marine life. This study aims to determine the management of seagrass ecosystems with an ecological systems approach in the waters of Biluhu Timur, which has been designated as a regional marine protected area (MPA) since 2023. The study was conducted in August-September 2024. Four research stations were identified based on the purposive sampling method. Seagrass sampling was performed using the seagrass net method with a 50 x 50 cm quadrant size. Data analysis in this study includes the frequency of presence, species density and percent cover. The results of the study showed that there were ten species of seagrass found in Biluhu Timur MPA, namely Enhalus acoroides, Cymodocea serrulata, Cymodocea rotundata, Halophila decipiens, Halophila ovalis, Halodule pinifolia, Halodule uninervis, Syringodium isoetifolium, Thalassodendron ciliatum, and Thalassia hemprichii. The results of the analysis of the highest seagrass density in the Biluhu Timur MPA were the Cymodocea rotundata seagrass with a value of 677.53 ind/m2, and the lowest density was the Halophila decipiens type with a value of 15.00 ind/m2. The highest frequency of presence was the Cymodocea rotundata species, and the lowest was the Halophila decipiens species. The results of the analysis of the percentage of cover of 54.64% indicate that the condition of the seagrass in the  Biluhu Timur Marine Protected Area is in the less healthy category.

oai:ojs.ejournal.undip.ac.id:article/16571 2020-04-17T12:04:59Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/16571 2020-04-17T12:04:59Z Buletin Oseanografi Marina Vol 6, No 2 (2017): Buletin Oseanografi Marina; 122-129 Sunaryo, Sunaryo; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Djunaedi, Ali; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Santoso, Adi; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2017-11-18 00:38:59 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/16571 Body Weight; Mangrove Crab; Soft Shell Crab; Moulting; Carapace Length; Carapace Wide en Kepiting bakau (Scylla  serrata  Forsskål, 1775) merupakan salah satu sumber daya hayati laut yang dipergunakan sebagai bahan baku untuk memproduksi kepiting soka. Organisme ini mempunyai nilai ekonomis penting dan banyak dibudidayakan oleh petani tradisional untuk memenuhi kebutuhan pangan baik di pasar lokal maupun ekspor. Dikeluarkannya Keputusan Menteri No 1 Tahun 2015 membuat banyak pembudidaya maupun pengekspor Kepiting Bakau mengalami banyak kerugian karena kepiting soka yang diproduksi kebanyakan tidak memenuhi syarat ukuran yang sesuai dengan ketetapan Pemerintah. Oleh karena itu untuk mengatasi permasalahan tersebut perlu dilakukan pendekatan melalui penelitian perubahan morphometri Kepiting Bakau sebelum dan setelah moulting. Penelitian ini bertujuan untuk mengetahui hubungan panjang/lebar dan berat Kepiting Bakau pada saat sebelum dan setelah moulting yang dipelihara pada lingkungan budidaya di kawasan pertambakan di Desa Mojo, Kecamatan Ulujami, Kabupaten Pemalang. Penelitian ini menggunakan Kepiting Bakau (S. serrata Forsskål, 1775), berat 80 - 150 g, dipelihara pada bok plastik (30 x 20 x 25 cm) secara seluler, padat penebaran 15 ekor per m2. Penelitian ini menggunakan metode studi kasus. Parameter penelitian ditujukan pada pengukuran morphometri tubuh Kepiting Bakau sebelum dan setelah moulting, yaitu panjang dan lebar carapace serta berat. Parameter morphometrik bagian tubuh kepiting, meliputi: hubungan panjang carapace dan pertambahan panjang carapace, hubungan lebar carapace dan pertambahan lebar carapace, hubungan berat dan pertambahan berat tubuh kepiting bakau dianalisis menggunakan analisis regresi (Sudjana, 1982). Ukuran panjang carapace, lebar carapace dan berat kepiting bakau sebelum moulting satu sama lain menunjukkan adanya pola korelasi linier positif. Pola korelasi yang sama ditunjukkan juga pada hubungan antara ukuran panjang carapace, lebar carapace dan berat Kepiting Bakau sebelum moulting dengan pertambahan panjang carapace, lebar carapace dan berat Kepiting Bakau setelah moulting. Pertumbuhan panjang carapace, lebar carapace dan berat kepiting bakau pada saat moulting masing – masing secara berurutan dicapai sebesar 12,26 % ± SD 5,57 %, 13, 65 % ± SD 3,59 %, 23,46 % ± SD 10,934 %. Dengan diketahuinya parameter tersebut dapat dipergunakan sebagai parameter penentu pemilihan ukuran Kepiting Bakau sebagai bahan baku produksi kepiting soka yang sesuai dengan ketetapan peraturan pemerintah.  Mangrove crabs (Scylla serrata Forsskål, 1775) is one of the biological resources of the sea, that is used as raw material for soft shell crab production. This organism have economically important value and has been widely cultivated by traditional farmers to meet food needs in both the local and export markets. Assigned KepMen No 1 Tahun 2015 made more mangrove crab culturer and exporter were loss in bussines because the producing soft shell crab was not apropriate with the gorverment regulation. Therefore to solve this problem was importantly done the approach through the research about the change of morphometric of mangrove crab before and after moulting.This research was aimed to know the correlation between carapace length, carapace wide and weight of mangrove crab before and after moulting thats reared in the environment culture of brackishwaterpond area in Mojo Village, Ulujami District, Pemalang Regency. This research used mangrove crab (S. serrata Forsskål, 1775), the body weight size of 80-150 g, individually kept in plastic boxes (30 x 20 x 25 cm), 15 pieces per m2 density. Research was carried out using case study method. The research parameters were aimed on the meassuring of the mangrove crab morphometric before and after moulting, such as: carapace  length, carapace wide and body weight.  Morphometric parameters of mangrove crab body, include the rellation of carapace lenght and body weight, carapace wide and body weight, carapace lenght and carapace wide were analyzed with regression metode (Sudjana, 1982). Carapace  length, carapace wide and body weight before moulting one anothers showed a regression of linier positive model. The same correlation model were showed on the correlation between carapace lenght, carapace wide and body weight of mangrove crab before moulting with the addition of carapace  length, carapace wide and body weight of mangrove crab after moulting, each following order, are: 12,26 % ± SD 5,57 %, 13, 65 % ± SD 3,59 %, 23,46 % ± SD 10,934 %. This parameter could be used as defining parameter to choose the size of mangrove crab as raw material for soft shell crab production that appropriate to the goverment regulation. 

oai:ojs.ejournal.undip.ac.id:article/42859 2023-05-13T09:22:51Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/42859 2023-05-13T09:22:51Z Buletin Oseanografi Marina Vol 12, No 1 (2023): Buletin Oseanografi Marina; 1-8 Marsa, Yulandaris; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Susanto, A.B.; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Pramesti, Rini; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2023-02-04 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/42859 Bioplastik; Kappaphycus alvarezii; karagenan; karboksimetil kitosan id Plastik sintetis yang digunakan sebagai pembungkus makanan dapat menimbulkan masalah lingkungan, karena sulit terurai sehingga menjadi sampah. Bioplastik dapat menjadi alternatif plastik komersial karena terbuat dari bahan alami sehingga mudah terurai. Berbagai bahan dasar pembuatan bioplastik telah ditemukan, salah satunya berbahan dasar karagenan. Bioplastik memiliki kekurangan seperti teksturnya yang kaku dan rapuh, sehingga perlu ditambahkan gliserol sebagai pemlastis. Bioplastik dapat terdegradasi lebih cepat sehingga perlu ditambahkan pengawet alami. Karboksimetil kitosan adalah polimer alami yang digunakan sebagai pengawet karena memiliki aktivitas antibakteri. Penelitian ini bertujuan mengetahui penambahan karboksimetil kitosan terhadap waktu degradasi bioplastik. Metode yang digunakan dalam penelitian bersifat eksperimental labolatoris. Pembuatan bioplastik menggunakan karboksimetil kitosan dengan konsentrasi 2 g, 3 g, 4 g dan 5 g, karagenan 3 g dan gliserol 1,7 ml. Berdasarkan hasil penelitian diperoleh nilai ketebalan sebesar 0,25 mm – 0,82 mm, nilai kuat tarik sebesar 1,04 MPa – 1,61 MPa, uji biodegradabilitas tercepat selama 116 menit dan terlama selama 373 menit. Pemberian karboksimetil kitosan dapat mempengaruhi waktu degradasi bioplastik dan pada konsentrasi karboksimetil kitosan 5 gram dapat terdegradasi lebih lama.The use of food wrapping plastic (synthetic) becomes waste that pollutes the environment, because its difficult to decompose. Bioplastics can be an alternative to commercial plastics because is making from natural materials so they are easily biodegradable. Various basic materials for making bioplastics have been found, one of which is carrageenan. Bioplastics have drawbacks such as their rigid and brittle texture, so additional ingredients such as glycerol are needed to be added as plasticizers. Bioplastics can be degraded more quickly, so natural preservatives need to be added. Carboxymethyl chitosan is a natural polimer that is used as a preservative because it has antibacterial activity. This study aims to determine the bioplastic characteristics of carrageenan with the addition of glycerol and carboxymethyl chitosan and to determine the appropriate concentration of carboxymethyl chitosan so that bioplastics from carrageenan and glycerol can last a long time. The method used was experimental laboratory, making bioplastics using carboxymethyl chitosan with concentrations of 2 g, 3 g, 4 g and 5 g, carrageenan 3 g and glycerol 1.7 ml. Results of the research that has been carried out, the results of the bioplastic characteristics in the form of a thickness value of 0.25 mm - 0.82 mm, a tensile strength value of 1.04 MPa - 1.61 MPa, the fastest biodegradability test for 116 minutes and the longest for 373 minutes. Carboxymethyl chitosan affects the bioplastic degradation time of carrageenan. 

oai:ojs.ejournal.undip.ac.id:article/6923 2014-05-20T05:21:18Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/6923 2014-05-20T05:21:18Z Buletin Oseanografi Marina Vol 2, No 1 (2013): Buletin Oseanografi Marina; 25-33 Endrawati, Hadi; PS. Ilmu Kelautan, Jurusan Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan UNDIP Riniatsih, Ita; PS. Ilmu Kelautan, Jurusan Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan UNDIP 2013-01-20 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/6923 en Sebagai pakan alami N. oculata memiliki kandungan lipid cukup tinggi yang dapat dimanfaatkan sebagai alternatif bahan biodiesel sesuai dengan perkembangan kebutuhan energi. Pertumbuhan N. oculata sangat tergantung pada suhu, salinitas, pH, dan intensitas cahaya. Tingkat suhu yang berbeda diduga berpengaruh terhadap kadar total lipid yang dihasilkan oleh Nannochloropsis oculata. Penelitian ini bertujuan untuk mengetahui pengaruh suhu terhadap produksi biomassa dan kadar total lipid pada kultur mikroalaga Nannochloropsis oculata. Metode penelitian yang digunakan adalah eksperimental dengan empat perlakuan suhu yaitu 18 oC, 23 oC, 28 oC, dan 33 oC. Pengamatan yang dilakukan meliputi kepadatan sel, produksi biomassa serta analisa kadar total lipid.  Hasil penelitian menunjukkan bahwa produksi rata-rata biomassa tertinggi pada suhu 28 oC (81,9 ± 1,67 mg), sementara rata-rata kadar total lipid terbesar pada suhu 33 oC (52,62 ± 4,86dw-%). Hasil penelitian menunjukkan bahwa peningkatan kepadatan sel akan diikuti peningkatan produksi biomassa. Dari hasil penelitian menunjukkan suhu yang baik untuk mendapatkan produksi biomassa dan kadar total lipid optimum pada suhu 18-33 oC.   Kata kunci:     Nannochloropsis oculata, Suhu, Kadar Total Lipid

oai:ojs.ejournal.undip.ac.id:article/78529 2026-02-11T04:57:56Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/78529 2026-02-11T04:57:56Z Buletin Oseanografi Marina Vol 15, No 1 (2026): Buletin Oseanografi Marina; 81-90 Prihatiningsih, Isnaini; Department of Marine Science, Faculty of Fisheries and Marine Science, Universitas Jenderal Soedirman Hidayat, Rizqi Rizaldi; Department of Marine Science, Faculty of Fisheries and Marine Science, Universitas Jenderal Soedirman Husni, Iqbal Ali; Department of Marine Science, Faculty of Fisheries and Marine Science, Universitas Jenderal Soedirman Nugroho, Agung Tri; Department of Marine Science, Faculty of Fisheries and Marine Science, Universitas Jenderal Soedirman Trenggono, Mukti; Department of Marine Science, Faculty of Fisheries and Marine Science, Universitas Jenderal Soedirman Jatnika, Jatnika; Department of Marine Science, Faculty of Fisheries and Marine Science, Universitas Jenderal Soedirman Hidayat, Syarief; College of Oceanography and Ecological Science, Shanghai Ocean University 2026-02-25 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/78529 Drifting Buoy; Ocean Current; Sea Surface Temperature; Segara Anakan Lagoon en Ocean currents and sea surface temperature (SST) were recognized as key oceanographic parameters that played a crucial role in understanding coastal and marine physical processes. Despite their importance, real-time monitoring of these variables in narrow and dynamic waterways remained limited. This study designed, developed, and evaluated a low-cost drifting buoy system for the real-time measurement of ocean currents and SST. The buoy integrated temperature sensors and a Global Positioning System (GPS) module, with LoRa technology enabling reliable long-range data transmission. GPS validation revealed a positional error of only 1–2 meters, even in challenging environments with dense urban or vegetative obstructions. Temperature sensor calibration against a standard thermometer yielded an R² value of 0.9989, indicating an exceptionally strong correlation. Field measurements in Segara Anakan Lagoon recorded SST values that fluctuated between 28.5°C and 29.37°C, reflecting typical tropical coastal conditions. Current speeds ranged from 0.052 to 0.78 m/s, with a distinct tidal influence: flows moved landward into the estuary during high tide and seaward during low tide. The results confirmed that the buoy was an effective, accurate, and practical tool for nearshore oceanographic monitoring, particularly in remote or data-scarce regions.

oai:ojs.ejournal.undip.ac.id:article/23657 2020-04-17T12:08:10Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/23657 2020-04-17T12:08:10Z Buletin Oseanografi Marina Vol 8, No 2 (2019): Buletin Oseanografi Marina; 109-115 Harimbi, Ken Asti; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Taufiq-Spj, Nur; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Riniatsih, Ita; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2019-10-04 00:00:00 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/23657 Stok Karbon; Teluk Awur; Jepara id Pemanasan global telah menjadi perhatian dunia. Riset karbon dilakukan dalam upaya adaptasi dan mitigasi perubahan iklim. Ekosistem pesisir memiliki fungsi penyerap karbon di lautan (carbon sink) yang dikenal dengan istilah blue carbon. Karbon bebas yang diserap kemudian tersimpan pada sedimen dan organ pada lamun dalam bentuk biomassa. Penelitian ini bertujuan untuk menghitung estimasi stok karbon pada lamun jenis Enhalus acoroides dan Cymodocea serrulata di Teluk Awur, Jepara Jawa Tengah pada Desember 2018. Sampling survey method digunakan dalam penelitian ini. Untuk mendapatkan nilai kerapatan lamun, penentuan titik sampling lamun dengan metode purposive sampling. Analisis kandungan karbon dengan metode pengabuan, sampel lamun dicuplik 3 individu pada jenis Enhalus acoroides dan 6 individu pada jenis Cymodocea serrulatadari 27 titik sampling. Penghitungan total stok karbon dilakukan dengan konversi data biomassa hasil perhitungan kerapatan lamun menjadi kandungan karbon. Hasil analisis menunjukkan estimasi stok karbon jenis lamun Enhalus acoroides (1,07 ton/ha) lebih tinggi daripada Cymodocea serrulata (0,64 ton/ha). Hal ini dapat disimpulkan bahwa ekosistem lamun berperan sebagai carbon sink. Untuk selanjutnya diharapkan adanya pengelolaan ekosistem pesisir dan laut secara terpadu untuk mempertahankan keberadaan lamun agar kontribusi terhadap ekosistem di sekitarnya semakin stabil. Global warming has been the world's concern. This research was conducted in concern to adapt and mitigate the climate change. Coastal ecosystem has a carbon sink function in the ocean known as a blue carbon. The absorbed carbon is stored on the sediment and organ of the seagrass in the form of biomass. This research aims to estimate carbon stocks on Enhalus acoroides and Cymodocea serrulata in Teluk Awur coastal waters, Jepara of Central Java which was conducted on December 2018. Sampling survey method was used in this study. In order to find the density value of the seagrass in the field area, purposive sampling method was used to determine the sampling points. Dry-ashing method was used for analysing carbon content of the seagrass by using 3 individuals of Enhalus acoroides and 6 individuals sample of Cymodocea serrulata from 27 sampling points. The total calculation of carbon stocks is conducted by converting biomass data into carbon content. The results shows that estimation of the carbon stock of seagrass Enhalus acoroides (1.07 tons/ha) was higher than Cymodocea serrulata (0.64 tons/ha). This can be conclude that the seagrass ecosystem serves as a carbon sink, hence, it is expected that integrated coastal and marine ecosystems management can be maintained the seagrass existence in order to contributed to the surrounding ecosystem. 

oai:ojs.ejournal.undip.ac.id:article/42363 2024-05-31T07:50:39Z buloma:ART

v2 https://ejournal.undip.ac.id/index.php/buloma/article/view/42363 2024-05-31T07:50:39Z Buletin Oseanografi Marina Vol 13, No 1 (2024): Buletin Oseanografi Marina; 113-121 Irwanto, Eko; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Redjeki, Sri; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Endrawati, Hadi; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Sabdono, Agus; Departemen Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro 2024-02-06 14:07:59 The Authors submitting a manuscript do so on the understanding that if accepted for publication, copyright of the article shall be assigned to BULOMA as the publisher of the journal. Copyright encompasses rights to reproduce and deliver the article in all form and media, including reprints, photographs, microfilms, and any other similar reproductions, as well as translations.BULOMA journal and the Editors make every effort to ensure that no wrong or misleading data, opinions or statements be published in the journal. In any way, the contents of the articles and advertisements published in BULOMA are the sole and exclusive responsibility of their respective authors and advertisers. url:https://ejournal.undip.ac.id/index.php/buloma/article/view/42363 Ekstraksi; FTIR; Pulau Panjang; Teluk Awur id Ekosistem terumbu karang memegang peranan penting dalam biodiversitas laut serta ikut berperan mengurangi dampak pemanasan global. Namun, ancaman yang dihadapi oleh karang dan ekosistem terumbu karang saat ini adalah keberadaan mikroplastik yang dibuang ke laut. Penelitian ini bertujuan untuk mengetahui keberadaan mikroplastik pada karang keras (jumlah, warna, bentuk, ukuran serta senyawa polimer penyusun mikroplastik) yang terdapat di perairan Pulau Panjang dan Pantai Teluk Awur, Jepara. Sampel karang keras diambil sebanyak 100 gram yang didasarkan pada lifeform pada setiap lokasi (Coral Massive, Coral Submassibe, Coral Banching, dan Coral Folious). Ekstraksi mikroplastik menggunakan larutan H2O2 30%, ditambahkan saline water dan direndam selama 24 jam, disaring menggunakan kertas whatman dan selanjutnya diamati dengan mikroskop. Pengamatan yang dilakukan meliputi kelimpahan, bentuk, warna, dan ukuran dari mikroplastik serta dianalisis menggunakan FTIR (Fourier Transform Infrared). Hasil penelitian, didapatkan bahwa karang keras di perairan Pulau Panjang dan perairan Teluk Awur terdapat mikroplastik sebanyak 34,4 partikel/kg dan 56,7 partikel/kg. Bentuk yang teridentifikasi ialah fiber, pelet, fragmen, dan film dengan bentuk fiber paling mendominasi (64%). Warna mikroplastik yang ditemukan yaitu hitam, biru, merah, transparant, dan ungu dengan warna dominansi hitam mencapai 65,93% dari seluruh mikroplastik di kedua lokasi penelitian. Ukuran mikroplastik yang teridentifikasi antara 0,309 – 4,791 mm. Hasil FTIR menunjukkan bahwa jenis mikroplastik yang ditemukan ialah LDPE (Low Density Polyethylene) atau LLDPE (Low LDPE) dan PS (Polystyrene).  The coral reef ecosystems play an important role in marine biodiversity and reduce the impact of global warming. However, the threat that the coral reef ecosystem is currently threatened by the presence of microplastics that are dumped into the sea. Therefore, this study aims to determine the abundance of microplastics in hard corals (number, color, shape, size, and polymer compounds that makeup microplastics) in Panjang Island and Teluk Awur Beach, Jepara. The sampling of hard corals was 100 grams per sample based on the lifeform at each location (Coral Massive, Coral Submassibe, Coral Branching, and Coral Folious).  The microplastics were extracted using 30% H2O2 solution, saline water was added and soaked for 24 hours, filtered using Whatman paper and then observed with a microscope. This study examined the abundance, shape, colour, and size of microplastics and analysed them using FTIR (Fourier Transform Infrared). The results showed that hard corals in Panjang Island waters and Awur Bay waters contained microplastics as much as 34.4 particles/kg and 56.7 particles/kg. The identified forms are fibres, pellets, fragments, and films with fibres dominating (64%). The colours of microplastics identified were black, blue, red, transparent, and purple with black dominating 65.93% of all microplastics in both study sites. The size of microplastics identified was between 0.309 - 4.791 mm. FTIR results show that the types of microplastics found are LDPE (Low Density Polyethylene) or LLDPE (Low LDPE) and PS (Polystyrene).