Study on some biological parameter aspects of red snapper (Lutjanus sanguineus)

anglais. This study was conducted on April 1992 in Pekalongan regency. Biometric observation of 350 sample "red snappers" (L. sanguineus) were used for search of some biological parameters (Effendi, 1972 and Pauly, 1983). The result showed that the range of total length (TL) was between 39-78 cm. Size of female was bigger than male. Gonad maturity stage (GMS), and gonad maturity index (GMI) was riper in the bigger size fish female of red snappers. The average of fatness identified by ponderal index was 1.32 for female and 1.31 male. The relationships length and weight of female was W = 4,772.10 at the power of -5 L at the power of 0.1185 and for male was W = 1,688.10 at the power of -4 L at the power of 0.1085. These biological parameters were based on domestication effort of snappers especially L. sanguineus for developing aquaculture

indonésien. Penelitian beberapa aspek biologi ikan kakap merah telah dilakukan di Pekalongan, pada bulan April 1992. Pengamatan biometrik terhadap 350 sampel metode yang telah dikemukakan Effendi, 1972 dan Pauly, 1983. Hasil pengamatan menunjukkan bahwa kisaran panjang total (TL) kakap merah antara 39 - 78 cm. Ukuran ikan betina lebih besar dari ikan jantan. Pada ukuran ikan yang lebih panjang, tingkat kematangan gonad (TKG) semakin matang dan indek kematangan gonadnya semakin besar. Rata-rata tingkat kegemukan ikan yang diduga dengan "ponderal indeks" kakap merah betina 1,32 dan ikan jantan 1,31. Dari perhitungan hubungan panjang dan berat ikan diperoleh persamaan : W = 4,722 x 10 pangkat -5 L pangkat 0,1188 untuk ikan betina dan W = 1,168. 10 pangkat -4 L pangkat 0,1085 untuk ikan jantan. Beberapa parameter biologi tersebut diharapkan dapat menunjang upaya domestikasi kakap merah terutama dari jenis L. sanguineus guna pengembangan budidaya