日本使徒
解淀粉芽孢杆菌
海参
生物
地衣芽孢杆菌
枯草芽孢杆菌
食品科学
微生物学
动物科学
细菌
生态学
发酵
遗传学
作者
Zhen Lu,Qiuhua Yang,Qiang Lin,Jianshao Wu,Hong Du,Changyong Zhou
摘要
The aim of this study was to determine the effects of Bacillus licheniformis CQN-12, B. amyloliquefaciens CQN-2, and B. subtilis CQN-39 originally isolated from the gut of a healthy sea cucumber (Apostichopus japonicus), on the growth performance, gut microbiota and immune response of sea cucumbers (A. japonicus). Sea cucumbers were fed a commercial pellet feed supplemented with B. licheniformis CQN-12, B. amyloliquefaciens CQN-2 or B. subtilis CQN-39 at different concentrations (0 (control), 107 and 109 CFU/g respectively), for 60 days. Our results revealed that that dietary B. licheniformis CQN-12 and B. amyloliquefaciens CQN-2 (107 CFU/g optimal concentration) enhanced growth performance, up-regulated innate immunity and altered microbial colonization in the gut of sea cucumbers whereas dietary B. subtilis CQN-39 had no significant effect. Furthermore, diets supplemented with an optimal concentration of B. licheniformis CQN-12 and B. amyloliquefaciens CQN-2 stimulated the mRNA expression of superoxide dismutase, lysozyme, and catalase. In conclusion, our study suggests that B. licheniformis CQN-12 and B. amyloliquefaciens CQN-2 could be used in feed supplements for healthier production of sea cucumbers in artificial farms.
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