Figure 2: Mean relative abundance of ASVs from the class Actinopterygii detected in Mesonauta festivus gut samples based on the amplification of the 18S rRNA V4-V5 gene (n = 8). Samples have been grouped according to the blocking primers used during their amplification. The percentage above each bar plot represent the residual relative abundance of the class Actinopterygii when compared to the control group (colored in blue).