In the present study, we investigated the individual day food consumption (I_DF), specific growth rate (SGR), food conversion (FC), and gonadosomatic index (GSI) between males and females S.argus1 year old, as well as activities of trypsin, amylase and lipase in stomach, hepatopancreas and intestinae in S. argus below 1 year old, 1-2 years old, and above 2 years old. Result showed that individual day food consumption, specific growth rate and food conversion in female S.argus was significantly higher than males (P<0.05).GSI increased from March to May, and a significantly higher GSI could be found in females at the end of experiment. Pepsin in stomach, amylase and trypsin (except hindgut) in hepatopancreas and intestinae exhibited higher activities in females than males in below 1 year old and 1-2 years old fish , but no difference was found in lipase, pepsin, amylase and trypsin between males and females S.argus above 2 years old. Activities of pepsin, trypsin and amylase were highest in fish below 1 year old, then in 1-2 years old, and the lowest in that above the 2 years old. However, a reverse trend was found in lipase, and a significant difference was found in the above enzymes (except some tissues) between 1 year old and 2 years old fish. Results suggested that faster growth rate in females S.argusbelow 2 years old than males was related to the higher IDF, FC and activities of protease and amylase, but that in fish above 2 years old had nothing to do with digestive enzyme.