Dietary magnesium requirement on dietary minerals and physiological function of juvenile hybrid sturgeon (Acipenser schrenckii female x Acipenser baerii male)
文献类型： 外文期刊
作者： Zhang, Yuanyuan 1 ; Fan, Ze 1 ; Wu, Di 1 ; Li, Jinnan 1 ; Xu, Qiyou 1 ; Liu, Hongbai 1 ; Wang, Liansheng 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Key Lab Aquat Anim Dis & Immune Technol Heilongji, Heilongjiang River Fisheries Res Inst, Harbin 150070, Peoples R China
2.Huzhou Univ, Sch Life Sci, Huzhou 313000, Peoples R China
关键词： Hybrid sturgeon; Magnesium; Mineral composition; Proximate chemical analysis; Antioxidant enzymes
期刊名称：AQUACULTURE INTERNATIONAL （ 影响因子：1.363； 五年影响因子：1.75 ）
ISSN： 0967-6120
年卷期：
页码：
收录情况： SCI
摘要： Sturgeons are an economically important freshwater aquacultural fish in China and elsewhere. Research was conducted to study the magnesium requirement of juvenile hybrid sturgeon (Acipenser schrenckii female x Acipenser baerii male) based on mineral composition, proximate chemical analysis, antioxidant enzyme levels, and growth metrics. Different levels of magnesium supplements (43.2, 157.3, 326.5, 549.6, 743.9, 938.4, and 1118.2 mg kg(-1)) were fed to juvenile sturgeon for 8 weeks. Five hundred twenty-five juvenile hybrid sturgeons (an average initial body weight of 7.65 g) were randomly divided into 7 groups with 3 replicates each (25 fish per replicate, tanks of 100x50x50 cm, dissolved oxygen >= 5.0 mg L-1, 12 light:12 dark) and fed 4 times per day with the experimental diets containing 40.78% crude protein and 10.03% crude fat. The body tissues and blood of fish were then sampled and analyzed. Growth performance was not significantly different between treatments (P>0.05). The optimal dietary magnesium requirement for hybrid sturgeon was estimated to be 355.16, 573.6, or 584.6 mg kg(-1) dietary magnesium based on whole-body Mg retention, the whole-body or vertebrae magnesium content versus dietary magnesium levels. The whole-body calcium to phosphorus ratio of the 43.2 and 326.5 mg kg(-1) groups was significantly higher than that of the 938.4 mg kg(-1) group (P< 0.05). A dietary magnesium concentration of 350-700 mg kg(-1) improved the antioxidant capacity by decreasing the serum malondialdehyde and enhancing serum superoxide dismutase, glutathione peroxidase, and catalase activities.
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