Fig. 3

The gut bacterial community characteristics of shrimp after cross-transplantation of gut bacterial consortia. a Principal coordinate analysis (PCoA) plots based on the Bray–Curtis dissimilarity. b The within-group similarities of bacterial community of shrimp gut samples after cross-transplantation. c The bacterial community similarities of WES + PBS and other groups. d The bacterial community similarities of BFS + PBS and other groups. e The bacterial community compositions after cross-transplantation. f The gut bacterial community similarities of shrimp between non-Vibrio infection and Vibrio infection. The boxes represent the median and interquartile range, and whiskers range from minimum to maximum values. Each sample had three replicates (n = 3). Different letters indicate a significant difference at p < 0.05 based on Student’s t test. g The linear relationships of bacterial community similarity and survival rates after Vibrio infection. Adjusted R² values and the significance levels are displayed for each of the linear regressions. WES, Water exchange system; BFS, Biofloc system; PBS, Phosphatic buffer solution; Enrich^WES, Bacterial consortium obtained from WES shrimp; Enrich^BFS, Bacterial consortium obtained from BFS shrimp; − Vp, non-Vibrio infection; + Vp, Vibrio infection; SR, Survival rate