文献类型: 外文期刊
作者: Wang, F-B 1 ; Luo, L. 1 ; Lin, S-M 1 ; Li, Y. 1 ; Chen, S. 1 ; Wang, Y-G 1 ; Wen, H. 2 ; Hu, C-J 3 ;
作者机构: 1.Southwest Univ, Key Lab Freshwater Fish Reprod & Dev, Coll Anim Sci & Technol, Minist Educ, Chongqing 400715, Peoples R China
2.Chinese Acad Fishery Sci, Key Lab Freshwater Ecol & Healthy Aquaculture, Yangtze River Fisheries Res Inst, Jinzhou, Peoples R China
3.Chongqing Fishery Sci Res Inst, Chongqing, Peoples R China
关键词: Ctenopharyngodon idella;growth;magnesium;oxidative stress;requirement
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: 2011 年 17 卷 3 期
页码:
收录情况: SCI
摘要: To determine dietary magnesium (Mg) requirements of juvenile grass carp, Ctenopharyngodon idella, magnesium sulphate was added to the basal diet at 0, 150, 300, 600, 1200, 2400 mg Mg kg(-1) diet. Each diet was fed to three replicate groups of juvenile grass carp (initial weight: 7.69 +/- 0.13 g) in a closed, recirculating rearing system for 76 days. No mortality or nutritional deficiency signs were observed except the growth depression in fish fed the Mg-deficient diet. Growth performance and activities of serum superoxide dismutase (SOD), glutathione peroxidase (GPx) and lysozyme (LSZ) were highest (P < 0.05) in fish fed the diet supplemented with 600 mg Mg kg(-1). The serum malondialdehyde (MDA) content was higher (P < 0.05) in fish fed the diets supplemented with 0 and 150 mg Mg kg(-1) than that in fish fed the diets with 300 mg Mg kg(-1). Mg concentrations both in whole-body and vertebrae increased with the increase in dietary Mg level up to 300 mg kg(-1), whereupon the response reached a plateau. Analysis by second-order polynomial regression of weight gain, by broken-line regression of vertebrae Mg concentration and by linear regression of whole-body Mg retention of fish indicated that the adequate dietary Mg concentration for juvenile grass carp was 713.5, 627.7 and 469.8 mg kg(-1) diet, respectively.
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