PROBIEN   20416
INSTITUTO DE INVESTIGACION Y DESARROLLO EN INGENIERIA DE PROCESOS, BIOTECNOLOGIA Y ENERGIAS ALTERNATIVAS
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Azinphosmethyl toxicity and risk assessment in the Patagonian autoctonous amphipod Hyalella curvispina
Autor/es:
ANGUIANO L; CASTRO C; VENTURINO A; FERRARI A
Lugar:
Porto- Portugal
Reunión:
Congreso; 17th Annual Meeting SETAC-Europe; 2007
Institución organizadora:
Society of Environmental Toxicology and Chemistry
Resumen:
The organophosphate azinphosmethyl (AzMe) is extensively applied in the Alto Valle (Argentinean Patagonia) to control codling moths (Cydia pomonella) from apples. This area is irrigated by fast-flowing channels providing a favourable habitat for many species including black fly (Simulium spp) and amphipods (Hyalella curvispina). Previously, we have observed differences in toxicity to AzMe between insecticide exposed and non-exposed populations. In this study, we individually assayed esterase activities from all populations. The three populations of organisms from pesticide exposed sites showed significantly higher (p<0.001) esterase activities (µmol x min-1 x mg prot-1) than the control ones. Mean enzyme activities were 2.17 ± 1.71 and 0.81 ± 0.35 for Simulium spp; 0.27 ± 0.10 and 0.14 ± 0.07 for H. curvispina and at last, 0.21 ± 0.16 and 0.016 ± 0.011 for C. pomonella. Therefore, we conclude that the differences in toxicity to AzMe between insecticide exposed and non-exposed populations of simuliids, amphipods and codling moths are at least due to enhanced esterase activity.