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Effect of dietary DHA/EPA ratio on the early development, antioxidant response and lipid metabolism in larvae of Siberia sturgeon (Acipenser baerii, Brandt)

文献类型： 外文期刊

作者： Luo, Lin 2 ; Ai, Lichuan 1 ; Liang, Xiaofang 1 ; Xing, Wei 2 ; Yu, Huanhuan 1 ; Zheng, Yinhua 1 ; Wu, Xiufeng 1 ; Liang, 1 ;

作者机构： 1.Chinese Acad Agr Sci, Natl Aquafeed Safety Assessment Stn, Feed Res Inst, Beijing, Peoples R China

2.Beijing Fisheries Res Inst, Beijing, Peoples R China

3.Chinese Acad Agr Sci, Feed Res Inst, Key Lab Feed Biotechnol, Minist Agr, Beijing, Peoples R China

4.Huazhong Agr Univ, Coll Fisheries, Wuhan, Hubei, Peoples R China

关键词： Acipenser baerii Brandt; antioxidant; DHA/EPA ratios; early development; larvae; lipid metabolism

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： 2019 年 25 卷 1 期

页码：

收录情况： SCI

摘要： A 30-day growth study was conducted to evaluate the impacts of the dietary DHA/EPA ratios on growth performance, antioxidant and lipid metabolism of Siberian sturgeon larvae. Four isonitrogenous and isoenergetic microcapsuled diets were formulated with various DHA/EPA ratios as 0.73 (R-0.73), 1.25 (R-1.25), 1.75 (R-1.75) and 2.33 (R-2.33). The results showed that the final body length, final body weight, specific growth rate and survival in the group R-2.33 were highest (p < 0.05), while there were no significant differences on viscerosomatic index and condition factor among all groups. Visceral catalase activity of groups R-2.33 and R-1.75 was significantly higher than that of groups R-0.73 and R-1.25, but superoxide dismutase, total antioxidant capacity, malondialdehyde, total cholesterol, triglycerides and high-density cholesterol were not different among groups. The gene expression of PPAR alpha and lipoprotein lipase had no difference among groups, but the expression of hepatic lipase gene in groups R-1.75 and R-2.33 was significantly lower than that in group R-0.73 as a negative feedback of high dietary DHA intake. In conclusion, growth performance was improved but kept stable antioxidant response in visceral mass with increased levels of DHA/EPA ratios from 0.73 to 2.33 for Siberian sturgeon larvae. Improving DHA/EPA ratios is a benefit for larvae to selectively deposit more DHA, then EPA and ARA than MUFA in the body to meet the requirement for early development.

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