Open AccessDetermination of Suitable Water Salinity and Live Food in The Rearing of Eel (Anguilla bicolor) Fry
Author(s) -
Sutrisno Sutrisno
Publication year - 2008
Language(s) - English
Resource type - Journals
ISSN - 1412-5269
DOI - 10.19027/jai.7.71-77
Subject(s) - salinity , zoology , fishery , biology , fish <actinopterygii> , growth rate , body weight , fresh water , ecology , endocrinology , mathematics , geometry
This study was conducted to determine suitable water salinity and live food in the rearing of eel, Anguilla bicolor fry. Eel fry in weight of 0.15±0.008 g/tail were reared at controlled tank at density of 2 fish liter -1 for 42 days. Experiment was devided into two steps. In the first step of experiment, eel fry were reared at different water salinity, i.e., 0; 5; 10 and 15 ppt. Fish were fed on Tubifex at satiation. The best result from the first experiment was then used in the second step of study to examine proper live food for eel fry. Fish were fed on live food ( Tubifex , Artemia , or Spirulina ) at 10% body weight. Survival rate, specific growth rate and food conversion ratio were observed. The result of experiment showed that survival rate of eel fry reared in water salinity of 5 ppt (100%), 10 (96%) and 15 ppt (97%) was higher (p 0.05). The best food conversion ratio was also being obtained at treatment of 5 ppt (3.36), followed repectively by 10 ppt (5.11), 15 ppt (5.70) and 0 ppt (21.11). No different survival rate of eel fry by feeding on different live food was obtained. Higher specific growth rate was achieved at feeding of Artemia (2.82% per day), followed respectively by Tubifex (1.85% per day) and Spirulina (0.15% per day). Food coversion ratio in each treatment was 4.42, 2.77 and 134.33, respectively. Keywords: eel, salinity, live food ABSTRAK Penelitian dilakukan dengan tujuan untuk mengetahui salinitas air dan jenis pakan alami yang tepat dalam pemeliharaan benih ikan sidat (Anguilla bicolor) . Benih sidat dengan berat rata-rata 0,15±0,008 g/ekor dipelihara selama 42 hari pada wadah terkontrol dengan kepadatan 2 ekor/liter. Penelitian dibagi kedalam dua tahap. Pada tahap pertama benih sidat diperlihara pada media dengan salinitas 0; 5, 10 dan 15 ppt. Pakan alami berupa cacing sutera diberikan secara satiasi. Salinitas terbaik hasil penelitian tahap pertama digunakan pada penelitian tahap kedua untuk mengetahui jenis pakan alami (cacing sutera Tubifex , Artemia , atau Spirulina ) yang cocok untuk benih sidat. Pakan diberikan sebanyak 10% bobot tubuh. Paramater yang diamati meliputi sintasan, laju pertumbuhan spesifik dan efisiensi pakan. Hasil penelitian menunjukkan bahwa sintasan benih ikan sidat yang dipelihara pada salinitas 5 (100%), 10 (96%) dan 15 ppt (97%) lebih tinggi (p 0,05). Konversi pakan terbaik juga diperoleh pada perlakuan 5 ppt (3,36), diikuti berturut-turut 10 ppt (5,11), 15 ppt (5,70) dan 0 ppt (21,11). Pemberian pakan alami yang berbeda tidak berpengaruh terhadap sintasan benih sidat, tetapi berpengaruh terhadap pertumbuhan. Pemberian Artemia memberikan laju pertumbuhan spesifik tertinggi, yaitu 2,82%/hari, Tubifex (1,85%/hari) dan Spirulina (0,15%/hari). Konversi pakan tiap perlakuan berturut-turut adalah 4,42; 2,77 dan 134,33. Kata kunci: ikan sidat, salinitas, pakan alami