Influence of Different Feeding Rate on Growth Performance and Survival Rate of Grass Carp (Ctenopharyngodon idella)

This study (at 60 days) was carried out to evaluate the effect of different of body weight on growth performance and survival rate of juvenile grass carp (Ctenopharyngodon idella). Six groups of juvenile grass carp (average weight 6.2±0.1 g) were fed by Lemnea sp. (2 times a day) with 10 percent of body weight (T1), 20 percent of body weight (T2), 30 percent of body weight (T3), 40 percent of body weight (T4), 50 percent of body weight (T5) and 60 percent of body weight (T6) with three replicates of each treatment combination were applied in this experiment. Different percentages of feed showed different growth performance in treatments and results clearly showed that fish group fed with 60 percent of body weight (T6) had positive effects on growt h performance, however it was not significantly different with T4 and T5 (P>0.05). The final body weight (FBW) were significantly higher in treatments T6, T5 and T4 (P 0.05) in this comparison. Similar responses were observed for specific growth rate (SGR). The best body weight gain (BWG) was obtained from T6, however there were no significant difference between T6 and T5 (P>0.05). The maximum daily growth rate (DGR) was obtained in T6, which was significantly different compared to other groups (P 0.05). The best result of growth performance was obtained by feeding 60 percent of body weight (T6) and somewhat in T4 and T5.