Figure 5

Boxplots of relative abundances (%) of the six most abundant prokaryotic orders found in the digesta-bacterial communities of fish fed diets with increasing levels of tributyrin (TBT). Symbols beyond the end of the whiskers are outliers. Cont: basal diet only (no TBT added); TBT1: basal diet with 0.1% TBT (m/m); TBT2: basal diet with 0.2% TBT (m/m); TBT4: basal diet with 0.4% TBT (m/m). In experimental diets, TBT was added to the basal diet at the expense of the excipient silica.