Evaluation of Marine Fish Meat Incorporated Diets on Growth and Survival of Post-larvae of Macrobrachium rosenbergii (de Man)

摘要

Post-larvae of Macrobrachium rosenbergii (PL-5, average weight-10.8 +-0.17 mg, average length, 12.1 +- 0.25 mm) were fed with five different marine fish meat incorporated diets, namely, diet-I, diet-II, diet-III, diet-IV and diet-V, prepared using ribbion fish (Lepturacanthus savala), croaker (Johnius dussumieri), pink pearch (Nemipterus japonicus), catfish (Osteogeneiosus militaris) and Thryssa (Thryssa sp.), respectively. Other ingredients such as prawn shell, groundnut oil cake, rice bran, wheat flour, poultry egg, agar and mineral mixture were similar for each diet. The experiment was conducted in plastic tubs (40 litres) for 30 days. Four replicates were carried out for each treatment. Stocking density was maintained at 2 PL L~(-1) and post larvae were fed 20% of their collective body weight. ANOVA (oneway) showed significantly higher (p<0.05) percentage gain in weight (481.3), higher specific growth rate (5.86) and higher protein efficiency ratio (2.0) in post-larvae fed on diet-III. However,there was no significant difference (p>0.05) in the growth rate of post-larvae fed on diet-I and diet-III. Significantly lower growth rate was observed in post-larvae fed on diet-II, diet-IV and diet-V as compared to post-larvae fed on diet-I and diet-Ill. There was no significant difference (p>0.05) in survival and food conversion ratio of post-larvae fed any of five different diets.