Influence of feeding level on growth, intraspecific weight variability and sexual growth dimorphism of Eurasian perch Perca fluviatilis L. reared in a recirculation system

Abstract The influence of the feeding level (FL) on growth and sexual growth dimorphism, was investigated in juvenile Eurasian perch (10 g initial body weight) reared in a recirculation system over 84 days. Fish were divided into groups of 105 individuals and fed three feeding levels: 1, 2 and 3% of the fish biomass (3 replicates/FL). Survival was not significantly ( P > 0.05) different among the three FLs. Feeding levels significantly affected ( P P P