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Dietary L-alanyl-L-glutamine supplementation improves growth performance and physiological function of hybrid sturgeon Acipenser schrenckii female x A. baerii male

文献类型： 外文期刊

作者： Wang, C. -A. 1 ; Xu, Q. -Y. 1 ; Xu, H. 1 ; Zhu, Q. 1 ; Yang, J. -L. 1 ; Sun, D. -J. 1 ;

作者机构： 1.Chinese Acad Fisheries Sci, Heilongjiang River Fisheries Inst, Harbin, Peoples R China

关键词： protease: 9001-92-7;EC 3.4.21.7;malondialdehyde: 542-78-9;amylase: 9000-92-4;superoxide dismutase: 9054-89-1;EC 1.15.1.1;glutamine: 6899-04-3;lipase: 9001-62-1;EC 3.1.1.3;sodium ion-potassium ion ATPase: EC 3.6.3.9;L-alanyl-L-glutamine: 39537-23-0;dietary supplement;growth performance;physiological function;growth survival;recycling system

期刊名称：JOURNAL OF APPLIED ICHTHYOLOGY （ 影响因子：0.892； 五年影响因子：0.956 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： Studies were conducted to demonstrate the effects of L-alanyl-L-glutamine (L-AG) on the growth performance and physiological function of hybrid sturgeon Acipenser schrenckii female x Acipenser baerii male larvae. Five isonitrogenous experimental diets contained five different L-AG levels: 0.0, 0.25, 0.5, 0.75 and 1.0%. Triplicate groups of 1500 fish (mean weight 0.42 +/- 0.05 g) were stocked in each aquarium (220 L), which were connected to a recycling system and fed to apparent satiation for 56 days. When the culture experiment was terminated, weight gain, specific growth, survival and condition factor were determined and served as indices for assessing growth performance. Na+-K+ ATPase, glutamine, superoxide dismutase (SOD), malondialdehyde (MDA), protease, lipase and amylase of the whole fish or intestine were also determined. The results showed that the growth performance improved significantly with increasing dietary L-AG supplementation levels from 0.0 to 1.0%. Fish fed diets containing higher L-AG level had greater Na+-K+ ATPase, glutamine, SOD and lower MDA when the supplementation level increased. Compared to the control group, however, there were no significant differences in protease, lipase or amylase of the intestine. In conclusion, dietary L-AG supplementation could help improving growth performance and physiological function of larval hybrid sturgeon.

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