1. 中国水产科学研究院 黑龙江水产研究所, 黑龙江 哈尔滨 150070; 2. 上海海洋大学 水产与生命学院, 上海 201306
白海文(1987), 男, 硕士研究生, 研究方向为鱼类繁殖生理学. E-mail: wenxue_1987@126.com
S917; Q48
农业部公益性行业科研专项(201003055); 黑龙江水产研究所基本科研项目(2008HSYZX-SY-04).
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, China
Acipenser schrenckii), <0.05), 其饵料系数<0.05), 摄食率<0.05), 、、27而温度对中肠和后肠蛋白酶活性则无显著性影响P>0.05)在此温度范围内施氏鲟幼鱼可获得最大生长率和存活率。
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.
