Abstract：In order to evaluate the possible application of three possible beneficial indigenous bacteria, Bacillus paramycoides MYα, Acinetobacter variabilis MYAⅡ and Bacillus altitudinis MY5 in American eel Anguilla rostrata, the three species bacteria were supplemented to the diets at dose of 5.0×107 cfu/g, and the effects on the growth performance, immune function and intestinal microbiota of American eel with an initial body weight of (10.00±0.09) g were determined. The results showed that American eel fed the diets containing MYα and MYAⅡ had increase in the weight gain rate (WGR) and specific growth rate (SGR), and the American eel fed the diets containing MY5 had the significantly lower hepatosmatic index (HIS) and viscerosomatic index (VSI) than the animals in the control group did (P＜0.05). The serum lysozyme activity was found to be increased significantly in fish fed MYAII and MY5 containing diets (P＜0.05), and the serum T-SOD activity in the group MYAII to be significantly higher than that in the control group (P＜0.05). The content of malondialdehyde (MDA) in liver of fish fed diets MYAⅡ and MY5 were lower than that in the control group. Compared with the control group, the abundance of genus Lactobacillus was increased and the abundance of genus Brevinema was decreased in groups MYα and MYAⅡ, but the abundance of Escherichia was increased in group MYα, indicating that there was more balanced intestinal microbiota in group MYAⅡ. On the other hand, the abundance of Mycoplasmataceae was increased significantly and Lactobacillus decreased in group MY5, indicating an imbalanced intestinal microbiota. In conclusion, A. variabilis MYAII led to improve the growth performance, immune function and antioxidant capacity, and modulate the intestinal microbiota, which implies that MYAII be a potential probiotic strain in the aquaculture of eel.
魏成业, 杨红玲, 夏孟婷, 聂庆杰, 翟少伟, 孙云章. 3株肠道原籍菌在美洲鳗鲡养殖中的应用研究[J]. 水产科学, 2024, 43(2): 189-198.
WEI Chengye, YANG Hongling, XIA Mengting, NIE Qingjie, ZHAI Shaowei, SUN Yunzhang. Application of Three Indigenous Bacterial Species in Aquaculture of American Eel Anguilla rostrata. Fisheries Science, 2024, 43(2): 189-198.
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2024, Vol. 43 
