Impacts of Different Feeding Rates on the Growth and Survival Rate of Silur meridionalis Juvenile

Growth and survival rates of 6 day old Silur meridionalis juveniles feeding on Limnodrilus at 6 different levels for 21 days were investigated.The results showed that the juveniles at 60% feeding rate grew faster than any other levels when the body length was less than 5 centimeters and 50% feeding rate resulted in faster growth with more than 5 centimeters.The survival rates of group A、B、C、D、E and F(feeding quotiety were 30%、40%、50%、60%、70%and 80%)were 56%、75%、89%、93%、94% and 91% respectively.The cannibal rate of A and B was 30% and 19%,higher than all other groups.The cannibal rate of group E and F was lower,4% and 4.5% respectively.