Sensitive biomarker response of shrimp Palaemonetes argentinus exposed to chlorpyrifos at environmental concentrations: Role of alphatocopherol and metallothioneins

BERTRAND LIDWINA; MONFERRÁN MAGADALENA VICTORIA; MOUNEYRAC CATHERINE ; BONANSEA ROCÍO INÉS; ASIS RAMON; AME MARIA VALERIA

AQUATIC TOXICOLOGY

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2016 vol. 179 p. 72 - 72

0166-445X

he aim of this study was to evaluate the toxic effects of chlorpyrifos (CPF) at environmental concentrations on the shrimp Palaemonetes argentinus, a South American native species. Organisms were exposed to environmentally relevant concentrations of CPF (from 3.5 to 94.5 ng CPF L−1) at laboratory conditions for 96 h. A wide battery of biochemical responses including bioaccumulation, damage and defense biomarkers were measured in cephalothorax and abdomen of shrimp.The concentration of CPF was below the detection limit of the method in both body sectors (8 ng CPF g−1 ww), probably indicating fast biotransformation of the parental compound. Our results showed that CPF exposure inhibits acetylcholinesterase activity from 3.5 ng CPF L−1, a concentration below the suggested Argentinean guidelines for the protection of aquatic biota. Moreover, oxidative stress was evidenced by increased H2O2 content and increased levels of TBARs and carbonyl groups in proteins. The inducti