DOI: https://doi.org/10.14710/ijfst.18.3.183-187

SOME ASPECTS OF THE REPRODUCTIVE BIOLOGY OF KRAI COB (Auxis thazard) IN SIBOLGA, NORTH SUMATERA

*Gussasta Levi Arnenda  -  Research Institute of Tuna Fisheries, Indonesia
Fathur Rochman  -  Research Institute of Tuna Fisheries, Indonesia
Roy Kurniawan  -  Research Institute of Tuna Fisheries, Indonesia

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Abstract
Tuna, tuna and skipjack (TTC) species in North Sumatra have contributed to world tuna production. One of the sources of neritic tuna caught in Indian Ocean waters (WPP 572 and 573) is tuna krai (Auxis thazard). Tongkol krai (Auxis thazard) has a high economic value in Indonesia, especially in the waters of Sibolga and its surroundings. Ensuring the sustainability of cob krai resources is an absolute must. The purpose of this study was to determine the reproductive biology of Tongkol Krai (Auxis thazard) in North Sumatra. Research on the Sibolga Archipelago Fisheries Port (PPN) in February, July, and October 2019. This study uses quantitative research using survey methods, with the sampling technique used in this study is purposive stratified sampling. The results showed that the correlation between length and weight of 118 Krai Cob W= 0.0078L 3.234, with a positive allometric growth pattern. Spread Length 25-41cmFL. Sex ratio 1:0.83 and not significantly different. The first time the gonads matured in females at 31.74cmFL, and 28.43cmFL in males. Female krai cob had TKG I 21.05%, TKG II 5.26%, TKG III 2.63%, TKG IV 63.17%, and TKG V 7.89%. Cob krai Male TKG I 8.69%, TKG II 4.34%, TKG III 8.69%, TKG IV 73.91%, and TKG 4.34%.
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Keywords: Cob Krai, , North Sumatra, Reproductive Biology

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Section: Research Articles
Language : EN
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  1. This research is part of the TA Tuna Fisheries Research Workshop. 2019. Thank you to the Head of the Tuna Fisheries
  2. Research Workshop for the 2016-2020 period, Mr. Zulkarnaen Fahmi, S.Pi., M.Sc. The award was also given to the Head of the Tuna Fisheries Research Workshop (LRPT) for the 2021 period, Mrs. Ririk Kartika Sulistyaningsih, S.Pi., M.App.Sc
  3. Thank you for the guidance from Aried Wudjie, S.Pi. The authors thank all researchers, enumerators and analysts of Loka Tuna Fisheries Research during the research. Thank you to all those who have helped carry out this research
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