Effect of Dietary Carbohydrate Level on Growth Performance, Blood Chemistry, Hepatic Enzyme Activity, and Growth Hormone Gene Expression in Wuchang Bream (Megalobrama amblycephala)
文献类型： 外文期刊
作者： Zhou, Chuanpeng 1 ; Ge, Xianping 1 ; Liu, Bo 1 ; Xie, Jun 1 ; Xu, Pao 1 ; Zhou, Qunlan 3 ; Pan, Liangkun; Chen, Ruli;
作者机构： 1.Nanjing Agr Univ, Wuxi Fisheries Coll, Wuxi 214081, Peoples R China
2.Chinese Acad Fishery Sci, Freshwater Fisheries Res Ctr, Key Lab Genet Breeding & Aquaculture Biol Freshwa, Minist Agr, Wuxi City 214081, Jiangsu, Peoples R China
3.Chinese Acad Fishery Sci, F
期刊名称：ISRAELI JOURNAL OF AQUACULTURE-BAMIDGEH （ 影响因子：0.287； 五年影响因子：0.593 ）
ISSN： 0792-156X
年卷期： 2013 年 65 卷
页码：
收录情况： SCI
摘要： An 8-week feeding trial investigated the effect of dietary carbohydrate level on growth performance, blood chemistry, hepatic enzyme activity, and growth hormone gene expression of juvenile Wuchang bream (Megalobrama amblycephala). Six isonitrogenous (34% crude protein) and isolipidic (8% crude lipid) semi-purified diets containing graded levels of carbohydrate (0, 19%, 25%, 31%, 38%, 47%) were fed to triplicate groups of juveniles. The significantly highest weight gain and specific growth rate were obtained in fish fed the 31% diet. Whole body moisture dropped while lipid and hepatic glycogen rose as the carbohydrate level increased but there were no significant differences in whole body protein or ash content. The hepatosomatic index, plasma glucose, and liver glycogen levels positively correlated with the dietary carbohydrate level. Glucokinase activity significantly rose and glucose-6-phosphatase activity significantly dropped as the carbohydrate level rose, but there were no significant differences in phosphoenolpyruvate carboxykinase activity. Growth hormone gene expression was positively related to growth performance. Based on the measured parameters, the appropriate dietary carbohydrate supplementation of juvenile Wuchang bream was 31-34% of the diet.
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