الفهرس | Only 14 pages are availabe for public view |
Abstract Tow experiments were carried out in this study. The 1st experiment was conducted to determine the economical combination of protein and feeding rate (1. 2 and 3% of biomass weight daily in duplicates) for fingerlings of rabbitfish. Siganus riv.ulatus. The 2nd experiment was conducted to determine the economical combination of energy levels (3883; 4056 and 4360 kcallkg diet) and feeding rate (2 and 4% of body weight/day for 98 days) on growth, feed conversion, nutrient retention. carcass and viscera composition, apparent nutrient digestibility and cost benefit analysis. Twelve net cages, each with dimensions of 1 xl xO.5 m were stocked with 10 fingerlings averaging 10 g/fish initial weight. In the I st experiment results indicated that no interaction between dietray protein and feeding rate on final body weight, specific growth rate and feed conversion ratio, however the final body weight, gain and specific growth rate were improved by increasing of dietray protein levels at the same feeding rate. In the 2 nd experiment final body weight, gain and specific growth rate were increased with an increased in dietary energy level at 2% feeding rate but no trends were evident at 4% feeding rate. Feed conversion (FeR), protein efficiency ratio (PER), productive protein value (PPV%) and energy retention (ER %) were higher when fish were fed at 2% than those were at 4% feeding rate. |