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All Journal Jurnal Iktiologi Indonesia (Indonesian Journal of Ichthyology)
M. F. Rahardjo
Departemen Manajemen Sumber Daya Perairan, FPIK, Institut Pertanian Bogor
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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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] Prawira Atmaja R.P. Tampubolon; M. F. Rahardjo; Krismono Krismono
Jurnal Iktiologi Indonesia Vol 12 No 2 (2012): Desember 2012
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v12i2.124

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)).
BIOLOGI REPRODUKSI IKAN PELANGI MERAH {Glossolepis incisus, Weber 1907) DI DANAU SENTANI [Reproductive biology of red rainbowfish (Glossolepis incisus Weber 1907) in Sentani Lake] Lisa Sofia Siby; M. F. Rahardjo; Djadja Subardja Sjafei
Jurnal Iktiologi Indonesia Vol 9 No 1 (2009): Juni 2009
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v9i1.201

Abstract

The aim of this study is to explain biology aspect of red rainbowfish that is reproductive biology [sex ratio, gonad maturity, fecundity, spawning season and length at first maturity (L50)]. This study was conducted in Sentani Lake during 5 months (December 2007-May 2008). Sex ratio was higher for female on January-February (1:3), gonad maturity and GSI was higher in station 1, 2, 3 and 6 at December. Fecundity ranges between 910-3122 eggs. Eggs diameter is 0,625-7,125 ^m and spawning pattern is partial spawner and iteroparous.
Co-Authors Djadja Subardja Sjafei Krismono Krismono Lisa Sofia Siby Prawira Atmaja R.P. Tampubolon