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Beta diversity of the gut microbiota among different groups of gibel carp exposed to aflatoxin B1. (A) The principal co-ordinate analysis (PCoA) of the bacterial community at the operational taxonomic unit (OTU) level. (B) The hierarchical clustering tree was calculated using the unweighted pair group method with arithmetic mean (UPGMA) method. C: control diet, T1: 50 µg/kg AFB1, T2: 100 µg/kg AFB1.
