Effects of Probiotics on the Water Quality, Growth Performance, Immunity, Digestion, and Intestinal Flora of Giant Freshwater Prawn (Macrobrachium rosenbergii) in the Biofloc Culture System

In order to explore the effects of probiotics on water quality, growth performance, nonspecific immunity, digestion, and intestinal flora Macrobrachium rosenbergii in biofloc culture system, three groups (six replicates each group) were set up divided into no bacteria (control group, Con), Bacillus subtilis (BS), effective microorganisms (EM) current experiment. After dissolution water, carbon source (glucose) was evenly sprayed aquaculture tank construct a with C/N 15. A total 1260 giant freshwater prawn (Macrobrachium rosenbergii) an initial body weight (2.09 ± 0.03) g randomly assigned 18 tanks (70 per tank). BS group EM significantly reduced nitrogen concentration. Both increased final mean weight, gain, specific rate, but decreased feed conversion rate rosenbergii. plasma superoxide dismutase, lysozyme, acid phosphatase contents, malonaldehyde content. serum content trypsin activity Chao ACE index species richness. abundance Chloroflexi Verrucomicrobiota. Bacillus. Overall, adding affected microbial community. The results showed that is good probiotic additive.