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| Effects of dietary supplementation with Clostridium butyricum on the growth performance and humoral immune response in Miichthys miiuy |
| SONG Zeng-fu, WU Tian-xing, CAI Li-sheng, ZHANG Li-jing, ZHENG Xiao-dong |
| School of Animal Sciences, Zhejiang University, Hangzhou 310027, China; Department of Chemistry, Zhejiang University, Hangzhou 310027, China; Key Laboratory for Molecular Design and Nutrition Engineering, Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China; School of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310027, China |
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Abstract The effects of dietary supplementation with Clostridium butyricum on growth performance and humoral immune response in Miichthys miiuy were evaluated. One hundred and fifty Miichthys miiuy weighing approximately 200~260 g were divided into five groups and reared in 15 tanks with closed circuiting culture system. The animals were fed 5 diets: basal diet only (control) or supplemented of the basal diet with C. butyricum at doses of 103 (CB1), 105 (CB2), 107 (CB3) or 109 (CB4) CFU/g. Compared with the control, the serum phenoloxidase activity was significantly increased by the supplementation (P<0.05), acid phosphatases activity was increased significantly (P<0.05) at the doses of 109 CFU/g. Serum lysozyme activity peaked at dose of 107 CFU/g and in the skin mucus at dose of 109 CFU/g. Immunoglobulin M level in the serum and skin mucus was increased except at dose of 103 CFU/g (P<0.05). The growth at the dose of 109 CFU/g was higher than that of the control (P<0.05). It is concluded that supplementation of C. butyricum can mediate the humoral immune responses and improve the growth performance in Miichthys miiuy.
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Received: 11 April 2006
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