饲料中添加丁酸梭菌对卵形鲳鲹幼鱼生长性能和肠道菌群的影响

Effects of dietary Clostridium butyricum supplementation on growth performance and intestinal flora of juvenile Trachinotus ovatus

  • 摘要: 研究了饲料中拌料添加丁酸梭菌 (Clostridium butyricum) 对卵形鲳鲹 (Trachinotus ovatus) 幼鱼生长性能和肠道菌群的影响,以期为丁酸梭菌在卵形鲳鲹养殖中的应用提供理论依据。设计了5组饲料,在基础饲料中分别添加0、1% (1×107 CFU·g−1)、2% (2×107 CFU·g−1)、3% (3×107 CFU·g−1)、4% (4×107 CFU·g−1) 的丁酸梭菌菌液饲喂卵形鲳鲹幼鱼8周。结果表明,饲料中添加2%丁酸梭菌可以显著提高卵形鲳鲹幼鱼的饲料利用率,肠道菌群群落的多样性最大,与对照组和4%添加组有显著差异 (P<0.05)。主坐标分析和主成分分析表明,饲料中丁酸梭菌的添加量是改变卵形鲳鲹幼鱼肠道菌群结构的主要因素。在门水平和属水平上,实验组与对照组均表现出不同程度的差异。饲料中添加丁酸梭菌能提高卵形鲳鲹幼鱼的生长性能、改善其肠道健康状态。

     

    Abstract: We evaluated the effects of dietary Clostridium butyricum supplementation on the growth performance and intestinal microbiota of juvenile Trachinotus ovatus, so as to provide a theoretical basis for the application of C. butyricum in T. ovatus aquaculture. In this study, five kinds of experimental feeds 0, 1% (1×107 CFU·g−1), 2% (2×107 CFU·g−1), 3% (3×107 CFU·g−1) and 4% (4×107 CFU·g−1) of C. butyricum had been sprayed on the basic feed to feed T. ovatus for eight weeks. The results show that dietary supplementation of 2% C. butyricum improved the feed utilization rate of juvenile T. ovatus significantly. The diversity of intestinal flora was significantly different from that in control group and 4% supplemental group (P<0.05). The principal co-ordinates analysis and principal component analysis show that the added amount of C. butyricum in the feed was the main factor for the change in the structure of the intestinal flora of juvenile T. ovatus. At phylum and genus level, C. butyricum supplemental group and control group show difference at different degrees. Dietary supplementation with C. butyricum improved the growth performance and intestinal health of juvenile T. ovatus.

     

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