Pendekatan Analitik untuk Mengkaji Stok Ikan Layang (Decapterus russelli) di Selat Madura
Abstract
Sumberdaya ikan layang di Jawa Timur mendominasi hasil tangkapan. Hasil tangkapan ikan layang Pada tahun 2006-2009 mengalami penurunan rata-rata 7% per tahun. Tujuan penelitian adalah eksplorasi parameter biologi dan dinamika populasi serta menduga status pemanfaatan ikan layang. Pengambilan sampel dilakukan di TPI Pondok Mimbo Kabupaten Situbondo, pada bulan September 2008 – Januari 2009. Data dianalisis menggunakan pendekatan analitik dengan bantuan program FISAT II (Gayanilo et al., 2002). Hasil penelitian menunjukkan bahwa nisbah kelamin jantan dan betina ikan layang seimbang dan pola pertumbuhan allometrik positif. Ukuran Lc (16,4 cm) lebih besar dari ukuran Lm (15,6 cm), sedangkan  sebesar 16,5 cm. Persamaan pertumbuhan ikan layang adalah Lt = 25,33 (1-). Laju mortalitas total, alami dan penangkapan masing-masing sebesar 2,71; 1,21 dan 1,74 tiap tahun. Laju eksploitasi sebesar 0,56 menunjukkan bahwa status perikanan layang mengalami lebih tangkap ringan.
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Kata Kunci: biologi, dinamika populasi, eksplorasi, Selat MaduraIssue
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