Recovery of plasmatic cholinesterase activity in a neotropical fish Prochilodus lineatus (Pisces, Curimatidae) exposed to organophosphorous pesticides.
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, 48 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, 48 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.
Loteste
Alicia
A
National Institute of Limnology, National Council of Technical and Scientific Research, Jose Macia 1933, (3016) Santo Tome City, Santa Fe Province, Argentine Republic. inali@arnet.com.ar
Cazenave
Jimena
J
Parma de Croux
M Julieta
MJ
D000222:Adaptation, Physiological; D000818:Animals; D002802:Cholinesterases / Q000494:pharmacology*; D004305:Dose-Response Relationship, Drug; D004781:Environmental Exposure; D005399:Fishes / Q000502:physiology*; D007306:Insecticides / Q000009:adverse effects*; D009943:Organophosphorus Compounds
D007306:Insecticides; D009943:Organophosphorus Compounds; D002802:Cholinesterases