A 10-week feeding experiment was conducted to evaluate the effects of dietary protein to lipid ratios(P/L) on growth,intestinal digestive enzyme activities and body composition in juvenile rice field eel(initial mean body weight of 65.76±1.07g).Nine test diets were formulated in a 3×3 factorial design to contain three protein levels(350,400 and 450 g/kg) for each of three lipid levels(40,80 and 120 g/kg),respectively.Each diet was randomly assigned to triplicate groups of 60 fish per net cage(1.5×2.0×1.5 m) and fed to satiation once dai...