Can the exposure system adopted influence the results of the atrazine toxicity in hepatic tissue of fish?

The widespread use of atrazine, a herbicide used to control weeds, has contributed to the increased contamination of aquatic environments. To assess the toxicological effects of a xenobiotic on a nontarget organism in the laboratory, different models of toxicological exposure systems have been widely used. Therefore, the aim of this study was to evaluate and compare the action of sublethal concentrations of atrazine on the hepatic histology of Oreochromis niloticus, considering two models of exposure: static (where atrazine was only added once) and semi-static (where atrazine was periodically renewed).