Aspek Biologi Rajungan (Portunus pelagicus) Linnaeus, 1758 (Malacostraca : Portunidae) Ditinjau dari Morfometri dan Tingkat Kematangan Gonad di TPI Bulu, Jepara

نویسندگان

چکیده

Rajungan (P. pelagicus, Linnaeus, 1758) merupakan salah satu komiditas perikanan yang memiliki nilai ekonomi penting sehingga banyak diminati dalam negeri maupun luar negeri. Permintaan rajungan terus meningkat berbanding lurus dengan penangkapan semakin meningkat. Tingkat pemanfaatan masih ditemukan ukuran under size tanpa memperhatikan dan kondisi habitat akan berpotensi mengurangi stok di perairan. Penelitian ini bertujuan untuk mengetahui morfometri tingkat kematangan gonad dilaksanakan bulan Oktober – November 2020 selama 30 hari TPI Bulu, Jepara. menggunakan metode survey yg bersifat deskriptif pengambilan sampel secara random sampling. Hasil dari penelitian diketahui rasio kelimpahan jantan sebesar 51% (2.297 ekor); betina 49% (2.203 ekor) 4.500 ekor rajungan. Distribusi lebar karapas berkisar antara 64 164 mm berat tubuh kisaran 23 333 gram. Data menunjukkan bahwa pola pertumbuhan ada perairan Bulu adalah allometrik positif yaitu lebih cepat dibandingkan karapas. b pada 3,51 3,33 serta 3,41 keseluruhan diduga mengalami pertama kali matang selang kelas 61 70 mm. 44% (961 TKG 1; 28% (626 2; (616 3, berarti nelayan Jepara belum sepenuhnya menerapkan kriteria layak tangkap peraturan diberlakukan. Blue swimming crab is a fishery commodity and in great demand both domestically abroad. The for crabs that continues to increase directly proportional the increasing catch. utilization rate of still undersize without paying attention condition so it has potential reduce stock waters. This study aims determine morphometry maturity level small gonads which were conducted from October days Fish Port, used descriptive method where sample was taken by results revealed abudance male blue crabs) female samples. distribution carapace width during ranged body weight data shows growth pattern Port waters positive allometric crab, meaning bodyweight faster than width. result value on whole crab. thought have experienced first time class sizes individual) at means fishermen not fully implemented criteria catching fish with applicable regulations.

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ژورنال

عنوان ژورنال: Journal of Marine Research

سال: 2022

ISSN: ['2407-7690']

DOI: https://doi.org/10.14710/jmr.v11i3.31258