发酵饲料对凡纳滨对虾幼虾生长性能和肠道细菌菌群的影响OA

To investigate the effect of probiotic fermented feed on the nursery performance of juvenile Litopenaeus van-namei,four experimental groups were established,fed with KB(basic feed),RS(feed fermented by Lactobacillus acidophilus),YB(feed fermented by Bacillus subtilis),and YR(feed fermented by compound probiotics),respec-tively.Juvenile Litopenaeus vannamei with uniform size(0.41±0.01)g were selected for a 32-day nursery test to evaluate the growth performance of the juvenile shrimp,and microbial composition in the aquaculture water and shrimp intestines.The results showed that the fermented feed groups significantly(p<0.05)increased the survival rate of the juvenile shrimp,and significantly(p<0.05)reduced the feed conversion ratio;in the aquaculture water of the fermented feed groups,the relative abundance of Xanthomonadales significantly(p<0.05)increased,while the relative abundances of Rhizobiales,Parvibaculales,and Vibrionales significantly(p<0.05)decreased.The re-sults of this study indicated that although fermented feeds exerted no significant effect on the overall microbial com-munity structure of aquaculture water,they reduced the relative abundance of Vibrionales,improved the survival rate of juvenile Litopenaeus vannamei,optimized the composition of their intestinal flora,and thereby enhanced feed utili-zation efficiency and growth rate.