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Abstrak: Tujuan dari penelitian ini adalah untuk mengetahui ukuran pertama kali matang gonad dan ukuran mata jaring gillnet untuk penangkapan ikan kembung ( Rastrelliger sp) di perairan Sidangoli Dehe. Pengambilan sampel dengan mengikuti kegiatan operasi penangkapan.dengan nelayan. Operasi penangkapan ikan dilakukan sebanyak 2 kali setiap minggu dan dilakukan selama satu bulan. Hasil tangkapan diambil secara acak ( random sampling ). Hasil tagkapan selanjutnya dilakukan pengukuran panjang cagak dan body girth. Penentuan tingkat kematangan gonad (TKG) yang dilakukan secara visual dengan melihat bentuk, warna serta perkembangan isi gonad.Hasil penelitian diperoleh ukuran pertama kali matang gonad ikan kembung ( Rastrelliger sp) yang tertangkap di perairan Desa Sidangoli Dehe dengan kisaran panjang cagak 250,7 mm sedamgkan ukuran mata jaring insang minimum yang sebaiknya digunakan untuk penangkapan ikan kembung ( Rastrelliger sp) yaitu 11,8 cm (4,6 inchi). Kata Kunci : Matang gonad, mata jaring, Rastrelliger sp, Sidangoli Dehe Abstract: The purpose of this study is to determine the size of first-time gonads and the size of gill-net for catching mackerel ( Rastrelliger sp) in Dehe Sidangoli waters. Sampling by taking part in arrest operationswith fishermen. Fishing operations are carried out twice a week and carried out for one month. The catch is taken randomly. The result of the next tag is the measurement of the fork length and body girth. Determination of the level of gonad maturity (TKG) that is done visually by looking at the shape, color and development of gonadal contents. The results showed that the first size of mackerel gonad ( Rastrelliger sp) that was caught in the waters of Sidangoli Dehe Village with a fork length of 250.7 mm was the minimum size of the gill-net which should be used for catching mackerel ( Rastrelliger sp) which was 11.8 cm (4.6 inches). Keywords : Gonad mature, mesh, Rastrelliger sp , Sidangoli Dehe

jurnal biologi tropis/jurnal biologi tropis

PENDUGAAN UKURAN PERTAMA KALI MATANG GONAD IKAN KEMBUNG (Rastrelliger sp) DI PERAIRAN DESA SIDANGOLI DEHE KECAMATAN JAILOLO SELATAN KABUPATEN HALMAHERA BARAT