RESUMO
The effect of residual concentrations of organophosphate pesticide chlorpyrifos (Lorsban 4E) on the activity of the acetylcholinesterase enzyme and oxygen : nitrogen ratio in the mussel Aulacomya ater was analyzed. Toxicity tests show a sensitivity to the pesticide in the bivalve estimated at 16 µg L(-1) (LC(50-96 hours)). Concentrations between 0.2 and 1.61 µg L(-1) were able to inhibit significantly the AChE activity, and concentrations between 0.8 and 1.61 µg L(-1) stimulate ammonia excretion and decrease oxygen : ammonia-N (O : N) ratio, with respect to the control group. A. ater proved to be a species sensitive to pesticide exposure and easy to handle in lab conditions. Thus, it is recommended as a bioindicator for use in programs of environmental alertness in the Eastern South Pacific coastal zone.
RESUMO
El objetivo del trabajo fué evaluar la toxicidad aguda de un efluente proveniente de la industria de celulosa, tratado mediante laguna aireada, lodo activado y precursores de compuestos con actividad hormonal (fitoesteroles)
Assuntos
Efluentes Industriais , Toxicidade , Indústria de Papel e Celulose , ChileRESUMO
El objetivo del trabajo fué evaluar la toxicidad aguda de un efluente proveniente de la industria de celulosa, tratado mediante laguna aireada, lodo activado y precursores de compuestos con actividad hormonal (fitoesteroles)
