水生生物学报2018，Vol.42Issue(4)：736-743,8.DOI:10.7541/2018.090
饲料蛋白水平对方正银鲫幼鱼生长、体成分、肝脏生化指标和肠道消化酶活性的影响
EFFECTS OF DIETARY PROTEIN LEVELS ON GROWTH PERFORMANCE, BODY COMPOSITION, LIVER BIOCHEMICAL INDICES, AND DIGESTIVE ENZYME ACTIVITIES OF JUVENILE CHINESE CRUCIAN CARP
摘要
Abstract
The study was conducted to evaluate the effects of dietary protein levels on evolution, body composition, liver biochemical indices, as well as digestive enzymes activities of juvenile Chinese crucian carp. Six isolipidic and isoenergetic diets were formulated containing 30.18%, 33.13%, 36.16%, 39.34%, 42.32%, and 45.46%, respectively. A total of 540 juvenile Chinese crucian carp with the average initial weight of (3.10 ± 0.01) g were randomly distributed into six groups with three replicates per group, containing 30 juvenile Chinese crucian carp per replicate, which were fed for eight weeks. The results indicated that with the increase of dietary protein level, the weight gain rate (WGR), specific growth rate (SGR), feed efficiency (FE ), protein efficiency ratio ( PER), the whole body protein content (WBPC), the hepatic glutamic-pyruvic transaminase (GPT), and intestinal trypsin (TPS) activities of fish in 36.16% group were significantly higher than those in other groups (P＜0.05). The hepatic total cholesterol (HTC) and trigly-ceride (TG) content of fish in 30.18% group were remarkably higher than those in other groups except for 33.13% group. Based on the quadratic regression analysis of the SGR, PER, and dietary protein levels, it was revealed that the rate of optimal dietary protein for Chinese crucian carp ranges from 35.29% to 37.07% under the experimental condi-tion.关键词
方正银鲫幼鱼/蛋白水平/生长性能/体成分/肝脏生化指标/肠道消化酶活性Key words
Juvenile Fang zheng Caucian carp/Protein level/Growth performance/Body-composition/Liver biochemical indices/Digestive enzymes分类
农业科技引用本文复制引用
桑永明,杨瑶,尹航,武玉如,尹海富..饲料蛋白水平对方正银鲫幼鱼生长、体成分、肝脏生化指标和肠道消化酶活性的影响[J].水生生物学报,2018,42(4):736-743,8.基金项目
中国-东盟海上合作基金(2016—2018) （2016—2018）
中国-东盟海水养殖技术联合研究与推广中心(DF)资助 [Supported by the China-ASEAN Center for Joint Research (2016—2018) （DF）
Promotion of Marine Aquaculture Technology (DF)] （DF）
