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Diversity of Scombridae in Cenderawasih Bay, Papua, as Revealed by DNA Barcoding

1Department of Fisheries, Faculty of Fisheries and Marine Science, University of Papua, Indonesia

2Department of Biology, Faculty of Mathematics and Natural Sciences, University of Papua, Indonesia

3Study Program of Aquaculture, Faculty of Fisheries and Marine Science, Universitas Brawijaya, Indonesia

4 National Park Office of Teluk Cenderawasih Bay, Indonesia

5 Department of Fisheries, Waropen Regency Government, Waropen Regency, Papua Province, Indonesia

6 Department of Biology, Faculty of Science, Bengkulu University, Indonesia

7 International Doctoral Program in Marine Science and Technology, National Sun Yat-sen University, Taiwan

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Received: 2 May 2026; Revised: 26 Jun 2026; Accepted: 7 Jul 2026; Available online: 2 Sep 2026; Published: 10 Sep 2026.

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Abstract

The family Scombridae comprises economically important pelagic fishes traded across. However, taxonomic knowledge of Scombridae in Cenderawasih Bay remains remarkably limited. This study applied DNA barcoding of the mitochondrial cytochrome c oxidase subunit I (COI) gene for species taxonomy resolution. A total of 57 specimens were successfully sequenced and identified through BLAST against the NCBI database. We detected 12 species from 9 genera, namely Auxis thazard, Katsuwonus pelamis, Euthynnus affinis, Thunnus albacares, Acanthocybium solandri, Scomberomorus commerson, Gymnosarda unicolor, Grammatorcynus bilineatus, Thunnus obesus, Rastrelliger kanagurta, Rastrelliger faughni, and Rastrelliger  brachysoma. Genetic diversity varied among the five focal species analyzed; Thunnus albacares and Auxis thazard exhibited the lowest haplotype diversity, indicating potential population vulnerability. Intraspecific genetic distances were below 2%, while interspecific distances exceeded 2%, confirming the effectiveness of the COI gene for species discrimination. Phylogenetic reconstruction produced well-supported clades consistent with established taxonomic relationships. The observed species composition in Cenderawasih Bay was dominated by widespread Indo-Pacific taxa. Notably, among the five tuna species (Thunnus spp.) known to occur in Indonesian waters, only Thunnus albacares and Thunnus obesus was detected in Cenderawasih Bay, raising the question of what ecological and oceanographic factors limit the presence of other tuna species. The ecological characteristics of Cenderawasih Bay are suggested to contribute to shaping the local Scombridae diversity patterns. These findings provide a fundamental genetic reference for Scombridae fisheries management and highlight the need for further oceanographic and ecological studies to understand the mechanisms driving species composition in the unique marine environment of Cenderawasih Bay.

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Keywords: COI gene; mtDNA; Thunnus; Diversity; Phylogenetic
Funding: We extend our sincere thanks to the Kemdiktisaintek, for funding this study under the Fundamental Research scheme, pursuant to Decree No. SP DIPA-139.04.1.693320/2025 (Revision 04; April 30, 2025)

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