Fig. 3From: The impact of the anti-diabetic drug metformin on the intestinal microbiome of larval brown trout (Salmo trutta f. fario)Sørensen index calculated from DGGE profiles from metformin exposed microbiome extracts. Significant changes are illustrated by using the Student’s t-test evaluation (n = 18 samples for each concentration); ***p ≤ 0.01; **p ≤ 0.05Back to article page