Effects of chlorpyrifos on cholinesterase activity and stress markers in the tropical reef fish Acanthochromis polyacanthus

摘要: Tropical coastal ecosystems, including the Great Barrier Reef (GBR) of Australia are increasingly threatened by pollution; yet few studies have investigated sensitivity GBR species to these pollutants. Here we exposed juveniles tropical reef fish Acanthochromis polyacanthus (spiny damselfish) three concentrations insecticide chlorpyrifos (CPF) and measured (i) muscle cholinesterase (ChE) activity; (ii) hepatic glutathione-S-transferase (GST) (iii) coenzyme Q (CoQ) redox balance, after 6 h 96 exposure. After h, ChE activity was significantly inhibited 26%, 49% 53% when were 1, 10 or 100 μg/L CPF, respectively. Muscle characterization revealed types ChEs, two atypical forms. Hepatic CoQ antioxidant form increased at exposure, potentially demonstrating an early response CPF-induced oxidative stress in liver. GST not affected CPF