Dietary vitamin E requirement of sub-adult genetically improved farmed tilapia strain of Nile tilapia (Oreochromis niloticus) reared in freshwater
文献类型： 外文期刊
作者： Jiang, Ming 1 ; Ma, Li 2 ; Shao, Hui 1 ; Wu, Fan 1 ; Liu, Wei 1 ; Tian, Juan 1 ; Yu, Lijuan 1 ; Lu, Xing 1 ; Wen, Hua 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Fish Nutr & Feed Div, Yangtze River Fisheries Res Inst, Wuhan 430223, Hubei, Peoples R China
2.COFCO Feed Co Ltd, Beijing, Peoples R China
关键词： antioxidant response; lipid; requirement; tilapia; vitamin E
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： 2020 年 26 卷 2 期
页码：
收录情况： SCI
摘要： A two-factor orthogonal test was conducted to determine the dietary vitamin E (VE, dl-alpha-tocopheryl acetate) requirement for sub-adult GIFT strain of Nile tilapia (Oreochromis niloticus) at two lipid levels, and evaluate its effect on antioxidant responses. A basal diet containing 60 or 130 g/kg of soybean oil was supplemented with 0, 20, 40, 60, 120 and 240 mg VE/kg, respectively. Each diet was fed to three replicate groups of tilapia with initial weight (80.3 +/- 0.7) g for 10 weeks. Results showed that the weight gain, feed efficiency and hepatic VE retention of fish were significantly increased by the increased VE in diets. In groups with 60 and 130 g/kg lipid, fish fed diets supplemented with VE had higher serum superoxide dismutase (SOD) and catalase activity, and lower malondialdehyde content than fish fed the VE un-supplemented diet (p < .05). The proximate composition of fish had no significant difference in the group with 130 g/kg lipid, whereas crude lipid and ash content were significantly affected by dietary VE in the group with 60 g/kg lipid. Based on broken-line regression analysis, dietary VE requirement to support the maximum weight gain and serum SOD were 43.2-45.8 and 66.0-76.1 mg/kg in diets with 60 and 130 g/kg lipid, respectively.
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