Recovery of plasmatic cholinesterase activity in a neotropical fish Prochilodus lineatus (Pisces, Curimatidae) exposed to organophosphorus pesticides.

LOTESTE, A., CAZENAVE, J., PARMA DE CROUX, M.J.

Journal of Environmental Biology

Triveni Enterprises

Lugar: Luknow, India; Año: 2002 vol. 23 p. 225 - 229

0254-8704

The objective was to determine the plasmatic enzyme cholinesterase recovery, after being inhibited by an organophosphorous in juveniles of Prochilodus lineatus. Fish were exposed 12 h to a sublethal concentration of 1 mg/l of monocrotophos, and immediately placing in clean water during 12, 24 and 96 h to detoxification. After this period, blood was extracted and plasma were used for the quantification of cholinesterase. The results showed a enzymatic inhibition of 91.9%, 55.1%, 50.4% and 33.4% with 12, 24 and 96 h of recovery, respectively. The enzymatic activity spreads to be normalized with the course of hours and the degree of inhibition obtained initially was very high and sustained in the first 48 h.