文献类型： 外文期刊
作者： Li, Meifeng 1 ; Zhang, Li 3 ; Hu, Bing 4 ; Liu, Lei 1 ; Huang, Feng 1 ; Tian, Juan 2 ; Hu, Xianqin 1 ; Wang, Yuanyuan 1 ;
作者机构： 1.Wuhan Polytech Univ, Key Lab Anim Nutr & Feed Sci Hubei Prov, 68 Xuefu South Rd, Wuhan 430023, Peoples R China
2.Chinese Acad Fishery Sci, Yangtze River Fisheries Res Inst, Key Lab Freshwater Biodivers Conservat, Minist Agr & Rural Affairs, 8 Wudayuan 1st Rd, Wuhan 430223, Peoples R China
3.Huazhong Agr Univ, Coll Fisheries, Wuhan 430070, Peoples R China
4.Fujian Prov Key Lab Special Aquat Formula Feed, Fuqing 350308, Peoples R China
关键词： Cyprinids; Micronutrients; Mineral requirement; Growth metrics; Feed formulation; Proximate chemical composition; Blood chemistry
期刊名称：AQUACULTURE INTERNATIONAL （ 影响因子：2.953； 五年影响因子：2.94 ）
ISSN： 0967-6120
年卷期：
页码：
收录情况： SCI
摘要： A 60-day feeding trial was conducted to estimate the optimum phosphorus requirement of juvenile bighead carp (Aristichthys nobilis). Fish (initial body weight: 2.42 +/- 0.08 g) were hand-fed with six isoproteic (437 g kg(-1)) and isolipidic (68 g kg(-1)) diets containing graded phosphorus levels (0.90, 4.40, 8.30, 11.90, 15.50, and 19.30 g kg(-1)) thrice daily to apparent satiation. Each diet was randomly assigned to triplicate tanks, and each tank was stocked with 30 fish. The highest weight gain rate (WGR, 288.94%) and specific growth rate (2.28% day(-1)) and the best feed conversion rate (FCR, 1.91) were recorded in fish fed 8.30 g kg(-1) phosphorus. The body composition analysis showed that the phosphorus contents in the whole body, muscle, vertebra, and plasma of fish fed the phosphorus-supplemented diets were higher than those of fish fed the control diet, whereas the phosphorus retention rate and crude lipid contents in the whole body and muscle presented the reverse results. The highest activity of lipase (41.97 U g(-1) prot) in the intestine was found in fish fed the diet with 11.90 g kg(-1) phosphorus. Further, the contents of total protein, albumin, and globulin in plasma were increased as dietary phosphorus levels ranged from 0.90 to 11.90 g kg(-1) and then decreased with further increased phosphorus levels. The highest contents of triglyceride (1.85 mmol L-1) and total cholesterol (2.16 mmol L-1) in plasma occurred at dietary phosphorus level of 0.90 g kg(-1). Broken-line model analysis based on WGR, FCR, and the phosphorus contents of the whole body and vertebra indicated that the optimal phosphorus requirements for juvenile bighead carp were 7.16, 9.02, 10.88, and 11.04 g kg(-1), respectively.
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