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Effect of dietary level of vitamin E on growth performance, antioxidant ability, and resistance to Vibrio alginolyticus challenge in yellow drum Nibea albiflora

文献类型： 外文期刊

作者： Wang, Ligai 1 ; Ma, Binheng 2 ; Chen, Dongxing 2 ; Lou, Bao 1 ; Zhan, Wei 1 ; Chen, Ruiyi 1 ; Tan, Peng 1 ; Xu, Dongdong; 1 ;

作者机构： 1.Zhejiang Marine Fisheries Res Inst, Zhejiang Prov Key Lab Mariculture & Enhancement, Zhoushan 316000, Peoples R China

2.Zhejiang Ocean Univ, Marine & Fishery Res Inst, Zhoushan 316000, Peoples R China

3.Zhejiang Acad Agr Sci, Hangzhou 310021, Zhejiang, Peoples R China

关键词： Vitamin E; Growth performance; Antioxidant ability; Nibea albiflora

期刊名称：AQUACULTURE （ 影响因子：4.242； 五年影响因子：4.723 ）

ISSN： 0044-8486

年卷期： 2019 年 507 卷

页码：

收录情况： SCI

摘要： An 8-week feeding trial was conducted to establish the optimal dietary vitamin E requirement for juvenile yellow drum (Nibea albiflora). Fish (initial weight 32.32 +/- 0.26 g) were fed six diets containing graded levels of vitamin E (a-tocopherol) (0, 20, 40, 80, 160 and 320 mg kg(-1)). The levels of dietary vitamin E, analyzed by high-performance liquid chromatography, were 4.0, 15.4, 36.2, 69.4, 137.9 and 292.7 mg vitamin E kg(-1) diet. Weight gain and specific growth rate were significantly higher in fish fed the 69.4 mg kg(-1) diet than in fish fed the 4.0 mg kg(-1) diet. Among all diet treatments, the feed conversion ratio was the lowest and the protein efficiency ratio was the highest in fish fed the 69.4 mg kg(-1) diet. The whole-body lipid content of fish fed the 292.7 mg kg(-1) diet was significantly lower than that of fish fed the 4.0 mg kg(-1) diet. Liver vitamin E concentration increased with dietary vitamin E levels up to 137.9 mg kg(-1) diet, and plateaued thereafter. Fish fed the 36.2 mg kg(-1) diet had significantly higher serum superoxide dismutase activity than fish fed the 137.9 mg kg(-1) diet. The level of serum malondialdehyde was significantly lower in fish fed the 36.2 mg kg(-1) diet than in fish fed the 4.0 mg kg(-1) diet; fish fed the 292.7 mg kg(-1) diet had significantly higher lysozyme activity than fish fed the 4.0-69.4 mg kg(-1) diets. Subsequently, a challenge test by injection of Vibrio alginolyticus showed significantly higher cumulative mortality among fish fed the 292.7 mg kg(-1) diet as compared with those fed the 15.4-69.4 mg kg(-1) diets. This study demonstrated that proper dietary vitamin E could enhance growth performance, antioxidant status, and ability against bacterial infection in yellow drum juveniles. A broken-line model of percent weight gain indicated the optimal vitamin E requirement for juvenile yellow drum is 68.75 mg kg(-1).

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