Multiple metals and agricultural use affects oxidative stress biomarkers in freshwater Aegla crabs

Abstract Metals and agrochemicals are among the main aquatic contaminants, being able to trigger oxidative stress in exposed organisms. The objective of this work was evaluate correlation between level biomarkers Aegla crabs (Crustacea, Anomura) with (i) set metals present streams sediment (ii) land uses three hydrographic basins. study carried out (≤ 2nd order) basins southern Brazil (Basins Rio Suzana, Ligeirinho-Leãozinho Dourado). In these were quantified Cu, Cr, Cd, Fe, Mn Zn concentrations sediment. enzymes Catalase (CAT) Glutathione Reductase (GR), as well membrane lipid peroxidation (TBARS), analyzed adult females. PCA analysis showed that distribution different Cr Fe correlated positively CAT negatively TBARS GR. Dourado basin had lowest highest levels TBARS. However, there is predominance agriculture use, agricultural use. Besides basin, GR activity higher than others basins, indicating a compensatory response relation inhibition. Suzana rivers lower values, which may be due induction accumulated summary, indicates concentration toxic an adaptive induction, reduces Aegla. On other hand, metallic contamination, occurrence primarily influenced by