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Dietary arginine requirement of juvenile hybrid sturgeon (Acipenser schrenckiifxAcipenser baeriio)

文献类型: 外文期刊

作者: Wang, Liansheng 1 ; Wu, Junguang 1 ; Wang, Chang'an 1 ; Li, Jinnan 1 ; Zhao, Zhigang 1 ; Luo, Liang 1 ; Du, Xue 1 ; Xu, Q 1 ;

作者机构: 1.Chinese Acad Fishery Sci, Heilongjiang River Fisheries Res Inst, Harbin, Heilongjiang, Peoples R China

2.Shanghai Ocean Univ, Fisheries & Life Sci Coll, Shanghai, Peoples R China

关键词: amino acid;arginine;GH;IGF-I gene;growth;hybrid sturgeon

期刊名称:AQUACULTURE RESEARCH ( 影响因子:2.082; 五年影响因子:2.415 )

ISSN:

年卷期:

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收录情况: SCI

摘要: An 8-week feeding trial was conducted to evaluate the dietary arginine requirement of juvenile hybrid sturgeon. Seven isonitrogenous and isolipidic diets were formulated to contain graded levels of dietary arginine ranging from 1.74% to 3.54% (dry weight). The results indicated that the fish fed with 1.76% arginine diet had lower specific growth rate (SGR) and feed efficiency ratio (FER) than the fish fed the 2.64% to 3.24% arginine diets (p<.05), and the fish fed the 2.64% arginine diet presented the highest SGR. The fish fed with 1.76% arginine diet had lower whole-body crude protein content than the fish fed the 2.64% or 2.93% arginine diets (p<.05). Compared with the 1.76% arginine diet, 2.36% to 2.93% arginine diets significantly increased the total amino acid (TAA) concentration and total nonessential amino acid (TNEAA) of carcasses. The fish fed with 1.76% arginine diet had lower activity of nitric oxide synthase (T-NOS) and content of nitric oxide (NO) than the fish fed the 2.05% to 2.93% arginine diets in the liver. The fish fed with 1.76%, 2.05% or 2.36% arginine diets had lower gene expression of growth hormone (GH) and insulin-like growth factor I (IGF-I) in the liver than the fish fed the 2.64% to 3.53% arginine diets in the liver (p<.05). A broken-line analysis between SGR against the dietary arginine levels provided estimates for the optimal dietary arginine requirement of 2.47% corresponding to 6.18% of the dietary protein on a dry weight basis.

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