文献类型： 外文期刊

作者： Zheng, K. ¹ ; Qin, B. ¹ ; Chang, Q. ¹ ;

作者机构： 1.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Qingdao 266071, Shandong Provin, Peoples R China

2.Guangdong Haid Grp Co Ltd, Guangzhou, Guangdong, Peoples R China

关键词： dietary taurine; gene expression; growth; the tongue sole

期刊名称：AQUACULTURE NUTRITION （ 影响因子：3.497； 五年影响因子：3.78 ）

ISSN： 1353-5773

年卷期： 2016 年 22 卷 6 期

页码：

收录情况： SCI

摘要： The effect of graded levels of dietary taurine on growth, enzyme activities and pretrypsinogen (Ptry) mRNA expression in the tongue sole postlarvae was evaluated in this study. Four microdiets supplemented with 0 (T0), 5 (T0.5), 10 (T1.0) or 20 (T2.0) gkg(-1) taurine were prepared. These diets were fed to the postlarvae with an average initial body dry weight of 3.32 +/- 0.06mg for 28days. Survival and growth performance of the tongue sole postlarvae were significantly (P<0.05) influenced by dietary taurine. Survival rate of fish fed with 20gkg(-1) dietary taurine was significantly lower than other treatments. The growth of fish initially increased with increasing dietary taurine level and then decreased. Postlarvae fed with 10gkg(-1) dietary taurine showed the best growth performance. Trypsin activities showed a significant increase with increasing dietary taurine level and then reached a plateau, while amylase activities and alkaline phosphatase activities increased in the start with increasing dietary taurine and then decreased. Ptry mRNA expression was stimulated by dietary taurine. Excessive dietary taurine (20gkg(-1)) had adverse effects on survival, growth, digestive enzyme activities of the experimental fish. The suggested dietary taurine supplementation in microbound diets was 10gkg(-1) for the tongue sole postlarvae.