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RESEARCH ARTICLE
Pertumbuhan ikan oskar (Amphilophus citrinellus, Gunther 1864) di Waduk Ir H. Djuanda, Jawa Barat [Growth of Midas Cichlid (Amphilophus citrinellus, Gunther 1864) in Ir. H. Djuanda Reservoir, West Java]
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Abstract
This research was held on October 2011 until January 2012 in Ir. H. Djuanda Reservoir, West Java, in order to describe some aspects of Midas cichlid (Amphilophus citrinellus) growth, such as length-weight relationship, condition factor, and growth constant (K). The samples were captured from six stations using 1, 1.5, 2, 2.5, 3, and 3.5 inches mesh sized of gill nets. The captured samples were separated in accordance to the stations, then the fish size and weight were measured. The total of fish captured were 460 individuals from six sampling stations. Total length of the captured fishes ranged from 62-210 mm and body weight is 4.81-187.18 gram. Midas cichlids are positive allometric. The condition factor varied depending on periods and stations. The growth formula for Midas cichlid was Lt= 215.78 (1-e'039 (t+025)).
Abstrak
Penelitian ini dilakukan pada bulan Oktober 2011-Januari 2012 di Waduk Ir. H. Djuanda, Jawa Barat, dengan tujuan untuk mendeskripsikan beberapa aspek yang bertalian dengan pertumbuhan ikan oskar (Amphilophus citrinellus) di waduk tersebut, seperti hubungan panjang-bobot, faktor kondisi, dan koefisien pertumbuhan. Contoh ikan diambil di enam stasiun yang menggunakan alat tangkap jaring insang berukuran mata jaring 1; 1,5; 2; 2,5; 3; dan 3,5 inci. Contoh ikan yang tertangkap dipisahkan berdasarkan stasiun, kemudian diukur panjang dan ditimbang bobotnya. Total ikan contoh yang tertangkap selama penelitian berjumlah 460 ekor yang berasal dari enam stasiun pengamatan. Panjang total dan bobot tubuh ikan berkisar antara 62-210 mm dan 4,81-187,18 gram. Pola pertumbuhan ikan oskar ada-lah alometrik positif. Faktor kondisi ikan oskar bervariasi berdasarkan waktu dan stasiun pengamatan. Persamaan pertumbuhan panjang ikan oskar mengikuti formula Lt= 215,78 (1-e-0,39 (t+0,25)).
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