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Effect of dietary vitamin E and selenium supplementation on growth, body composition, and antioxidant defense mechanism in juvenile largemouth bass (Micropterus salmoide) fed oxidized fish oil

文献类型： 外文期刊

作者： Chen, Yong-Jun 1 ; Liu, Yong-Jian 1 ; Tian, Li-Xia 1 ; Niu, Jin 2 ; Liang, Gui-Ying 1 ; Yang, Hui-Jun 1 ; Yuan, Yuan 1 ;

作者机构： 1.Sun Yat Sen Univ, Nutr Lab, Inst Aquat Econ Anim, Sch Life Sci, Guangzhou 510275, Guangdong, Peoples R China

2.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Guangzhou 510300, Guangdong, Peoples R China

关键词： Vitamin E;Selenium;Oxidized fish oil;Growth;Antioxidant defense;M. salmoide

期刊名称：FISH PHYSIOLOGY AND BIOCHEMISTRY （ 影响因子：2.794； 五年影响因子：2.876 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： Six oxidized fish oil contained diets were formulated to investigate the effect of graded levels of vitamin E (V-E) (alpha-tocopherol acetate: 160, 280, and 400 mg kg(-1)) associated with either 1.2 or 1.8 mg kg(-1) selenium (Se) on growth, body composition, and antioxidant defense mechanism of juvenile largemouth bass. Another control diet containing fresh fish oil with 160 mg kg(-1) V-E and 1.2 mg kg(-1) Se was also prepared. Over a 12-week feeding trial, about 5 % of Micropterus salmoide fed diet OxSe1.2/V(E)160 showed inflammation and hemorrhage symptoms at the base of dorsal, pectoral, and tail fin. Fish in all treatments survived well (above 90 %). Feed intakes (88.42-89.58 g fish(-1)) of all treatments were comparable. Growth performances (weight gain and specific growth rate) and feed utilization (feed and protein efficiency ratio) were significantly impaired by dietary oil oxidation, and they did not benefit from neither V-E nor Se supplementation. Regardless of dietary V-E and Se supplementation, oxidized oil ingestion resulted in markedly decreased hepatosomatic index and intraperitoneal fat ratio. Oxidized oil ingestion also induced markedly lower liver and muscle lipid contents, and these effects could be alleviated by dietary Se supplementation. Dietary oil oxidation stimulated hepatic catalase activities relative to the control, and supplementation of V-E abrogated this effect. Hepatic reduced glutathione content in the control was markedly higher than that of treatment OxSe1.2/V(E)160, without any significant differences comparing with the other oxidized oil receiving groups. Hepatic glutathione peroxidase activity and liver Se concentration reflected dietary Se profile, whereas liver V-E level reflected dietary V-E profile. Compared with the control, fish fed diet OxSe1.2/V(E)160 obtained markedly higher serum, liver and muscle malondialdehyde contents, which droppe significantly with increasing either V-E or Se supplementation. In conclusion, the overall results in this study suggested that both V-E and Se inclusion could protect largemouth bass from the oxidative damage challenged by dietary oil oxidation.

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