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Influence of dietary protein level on growth performance, digestibility and activity of immunity-related enzymes of leopard coral grouper, Plectropomus leopardus (Lacepede, 1802)

文献类型： 外文期刊

作者： Xia, Sudong 1 ; Sun, Jinhui 1 ; Li, Man 3 ; Zhao, Wei 1 ; Zhang, Dan 1 ; You, Hongzheng 2 ; Rajkumar, Mayalagu 2 ; Wu, Bi 1 ;

作者机构： 1.Tianjin Agr Univ, Dept Fishery Sci, Tianjin Key Lab Aqua Ecol & Aquaculture, Tianjin, Peoples R China

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

3.Tianjin Normal Univ, Coll Teacher Educ, Tianjin, Peoples R China

4.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Minist Agr, Key Lab Sustainable Dev Marine Fisheries, Qingdao 266071, Shandong, Peoples R China

关键词： digestibility; growth performance; immune enzyme activity; leopard coral grouper; Plectropomus leopardus

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：

页码：

收录情况： SCI

摘要： An 8-week feeding trial was conducted to assess the interaction between dietary protein levels and fish growth, digestibility and activity of immunity-related enzymes of Plectropomus leopardus. Five diets with different protein levels (400 g/kg, 450 g/kg, 500 g/kg, 550 g/kg and 600 g/kg protein) were designed. P. leopardus fed with 500 g/kg, 550 g/kg and 600 g/kg dietary protein, showed higher weight gain rates than fish fed 400 g/kg and 450 g/kg dietary protein. Ingestion rate in fish fed with 500 g/kg dietary protein was significantly higher than those with other diets. P. leopardus fed with 500 g/kg, 550 g/kg and 600 g/kg dietary protein, showed that feed coefficients were significantly lower than those fed with 400 g/kg and 450 g/kg dietary protein. Net protein utilization was significantly lower in fish fed with 400 g/kg diet than those with other diets. Fish fed with 400 g/kg and 450 g/kg dietary protein had an apparent feed digestibility coefficient for dry matter that was significantly lower than that with other diets. Protease activity was highest in fish fed on 500 g/kg dietary protein. Fish fed with 500 g/kg dietary protein, had the highest superoxide dismutase activity. Fish fed with 600 g/kg dietary protein, had the highest alkaline phosphatase activity. Thus, a diet containing 500 g/kg protein is recommended for P. leopardus aquaculture.

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