BAI Haiwen1
1. Heilongjiang Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin 150070, China;2. College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China2
1. Heilongjiang Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin 150070, China;2. College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, ChinaZHANG Ying1
1. Heilongjiang Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin 150070, China;2. College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, ChinaLI Xue1
1. Heilongjiang Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin 150070, China;2. College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, ChinaSUN Dajiang1
1. Heilongjiang Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin 150070, China;2. College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China1. Heilongjiang Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin 150070, China;2. College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China
S917; Q48
were fed at different temperature (15) to study the effects of water temperature on feeding, growth and activities of digestive enzymes using morphological and biochemical methods. The results showed that, the specific growthsignificantly increased with the increasing temperature between 15<0.05), and reaches the maximum at 24. The feed conversion ratio (FC) decreased significantly and reached the minimum at 24then greatly increased. In addition, the feed ration (FR) increased remarkablely with the temperature increasing ( < 0.05).The growth rate in the different temperature group were in the order of group 24. The water temperature had significant effects on the protease activity in the foregut( < 0.05), the protease activity in the foregut of the group 24 < 0.05), and the water temperature had no striking effects on the protease activity in the midgut and hindgut(> 0.05). The temperature had no striking effects on lipase activity in > 0.05), and the lipase activity of midgut was higher than the hindgut and foregut in every temperature group. The temperature had no striking effects on amylase activity in intestinal tract (> 0.05), and the amylase activity were in the order of midgut > hindgut > foregut. Taken together, the growth rate was fastest in the group 24, but the activities of intestinal digestive enzyme were lower than the group 21. In the temperature range juvenile can reaches the maximum growth rate and survival rate.
