2.4.1. Statistical analysis
The Kruskal–Wallis non-parametric, one-way analysis of variance was used to compare the fish size among sampling sites. Furthermore, the Kruskal–Wallis test was used to compare the concentration of each element between sites. Differences were considered to be statistically significant at p < 0.05. The statistical analyses were performed using the InfoStat® software. All values were expressed as mean ± standard deviation.