A 9week feeding experiment was carried out on juvenile silver pomfret Pampus argenteus［initial weight,(4.80±0.11)g］ to evaluate the effects of feed composition on weight gain,feed conversion ratio(FCR),hepatic lipase and antioxidant enzyme activities using nutriology and biochemistry.Four diets were formulated and named diet 1(fresh fish meat),diet 2(fresh fish meat mixed with formulated feed),diet 3(fresh fish meat mixed with formulated feed and solen meat)and diet 4(fresh fish meat mixed with formulated feed,solen meat and copepods).Each diet was assigned to triplicate groups.The results showed that the weight gain of silver pomfret could be affected significantly by the feed composition.The weight gain of diet 1 was the lowest among the four diets,and was significantly lower than those of other three diets.The weight gain of diet 4 was the highest,and was significantly higher than those of diet 2 and diet 3(P<0.05).The FCR of diet 1 was the highest among the four diets,and was significantly higher than those of other three diets.There was no significant difference in FCR among diet 2, diet 3 and diet 4(P>0.05).Hepatic lipase and total lipase activities of diet 1 were significantly lower than those of other diets(P<0.05),but no significant difference was found in hepatic lipase,lipoprotein lipase and total lipase activities among diet 2,diet 3 and diet 4(P>0.05).There was no significant difference in superoxide dismutase(SOD)and glutathione peroxidase(GSH-PX)activities among all diets(P>0.05).However,the lowest SOD and GSHPX activities were both in diet 1 and highest were in diet 4.The catalase(CAT)activity of diet 4 was significantly higher than those of diet 1,2 and 3(P<0.05),but no significant difference was found among diet 1,2 and 3(P>0.05).In conclusion,the only use of fish meat as a feed is not beneficial to the growth of silver pomfret.Copepods could be also used in the diet to improve the growth and antioxidant ability of silver pomfret.