Fig. 1

Bacterial α-diversity metrics (A: Amplicon Single Variants (ASV) richness, and B: Shannon index) of the gut of rainbow trout submitted to four different diets (n = 9 fish/diet). T₀: commercial fishmeal-rich diet; Tv: full terrestrial plant-based diet devoid of fishmeal; F1: plant-based diet in which 11% of plant proteins have been replaced by 5.5% of proteins from yeast (YEA) and 5.5% of proteins from insect larvae (INS); F2: plant-based diet in which 16.5% of plant proteins have been replaced by 5.5% YEA, 5.5% INS and 5.5% processed animal proteins (PAP). The kruskal-wallis pairwise test was used to perform the statistical comparisons among diets. Significance: *, p-value < 0.05; **, p-value < 0.01; ***, p-value < 0.001