1.College of Fisheries,Nanjing Agriculture University,Wuxi 214081,China;2. Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization，Ministry of Agriculture，Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences，Wuxi 214081, China
Abstract: Effects of two formulated diets on growth and digestive enzymatic activity related to lipid metabolism, and digestive system histology were studied in estuarine tapertail anchovyCoilianasusjuveniles with body weight of (2.78±0.09)g fed two formulated diets (diet 1, dry powder, and diet 2, hard sinking pellet) at water temperature of 23 ℃ for 60 days. The results showed that the fish fed diet 1 had weight gain rate of 76.64% and the juveniles fed diet 2 had weight gain rate of 104.17%, with significant difference (P<0.05). There were significant differences in condition factor and specific growth rate (P<0.05), and no significant difference was observed in activities of amylase, pepsin, and lipase, hepatosomatic index and viserosomatic index in the fish fed the two diets(P>0.05).The histological observation revealed that the distinct oil droplets were found in the hepatic cells of the fish in diet 2 group. On the other hand, there were thicker and higher mucosal fold in gastric walls in the fish in diet 1 group than those in diet 2 group. The fish fed diet 2 showed higher foregut diameter, mucosal fold height and muscularis in the midgut in the fish fed the diet 2 than those in the fish fed the diet 1, indicating that the diet 2 is suitable for rearing estuarine tapertail anchovy juveniles.
2014, Vol. 29 
