Fig. 2

Bacterial and fungal α-diversity and β-diversity of the gut of rainbow trout submitted to three different diets (n = 6 fish/diet). A Bacterial α-diversity metrics and B fungal α-diversity metrics. C D Principal coordinate analysis (PCoA) analysis based ons Bray–Curtis distance of the bacterial and fungal community of different three diets. E F PLS-DA analysis of the bacterial and fungal communities in the three different diets. FOM was the control diet, a commercial-like diet containing fishmeal and fish oil, and in the FMR group, fishmeal was replaced completely with plant protein. For the FOR group, fish oil was replaced completely with rapeseed oil. Significance: *, p value < 0.05; **, p value < 0.01