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Effects of dietary arginine on growth performance, feed utilization, haematological parameters and non-specific immune responses of juvenile Nile tilapia (Oreochromis niloticus L.)

文献类型: 外文期刊

作者: Yue, Yirong 1 ; Zou, Zhiying 1 ; Zhu, Jinglin 1 ; Li, Dayu 1 ; Xiao, Wei 1 ; Han, Jue 1 ; Yang, Hong 2 ;

作者机构: 1.Chinese Acad Fishery Sci, Freshwater Fisheries Res Ctr, Key Lab Freshwater Fisheries & Germplasm Resource, Minist Agr, Wuxi 214081, Peoples R China

2.Chinese Acad Fishery Sci, Freshwater Fisheries Res Ctr, Key Lab Freshwater Fisheries & Germplasm Resource, Minist Agr, Wuxi 214081

关键词: Arginine;growth performance;haematological parameters;non-specific immune responses;Juvenile Nile tilapia

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 effects of dietary arginine on growth performance, feed utilization, haematological parameters and non-specific immune responses of juvenile Nile tilapia (6.03 g). Five isonitrogenous and isoenergetic diets were formulated to contain graded levels of L-arginine (8.5 g kg(-1), 11.5 kg(-1), 15.3 kg(-1), 18.8 kg(-1) and 22.4 kg(-1) dry diet) from dietary ingredients and crystalline arginine. Each diet was randomly assigned to triplicate groups of 25 juvenile fish (6.04 +/- 0.02 g) three times daily (8:30, 12:30, and 17:00 hours) to apparent satiation. Results showed that the weight gain (WG) and special growth rate (SGR) increased with increasing dietary arginine levels up to 15.3 kg(-1) and remained nearly the same thereafter. Arginine supplementation had no impact on the survival, body composition and haematological parameters of tilapia. However, the immune responses (plasma nitric oxide content, total nitric oxide synthase (T-NOS) and lysozyme activity) significantly (P < 0.05) increased with increasing dietary argentine level after stress. Quadratic regression analysis (y = -0.7147x(2) + 25.986x + 147.53 R-2 = 0.8736) on weight gain against dietary arginine levels indicated that the optimal dietary arginine requirement was estimated to be 18.2 kg(-1) of the diet (corresponding to 6.24% of dietary protein on a dry weight basis). The present study indicates that arginine has an immunostimulatory potential to help juvenile Nile tilapia cope with stress conditions such as Streptococcus intae infection.

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