Effect of methyl parathion on the muscle and brain acetylcholinesterase activity of matrinxã (Brycon cephalus)

Author:

Almeida Luciana Cristina de1,Aguiar Lúcia Helena1,Moraes Gilberto1

Affiliation:

1. Universidade Federal de São Carlos, Brasil

Abstract

Farming of the freshwater fish is emerging in Brazil and many species from the wild are promising. The teleost matrinxã (Brycon cephalus) holds several characteristics such as fast growth rate, high commercial value and adaptability to artificial raring conditions, which make it a promising species for commerce. The use of pesticides in aquatic environment is frequent in Brazil, and methyl parathion is very common in aquaculture. We have determined the enzymatic activity of acetyl cholinesterase in white muscle and brain of matrinxã exposed to 2ppm of environmental methyl parathion for 24 hours. There was 64% and 69% of acetyl cholinesterase inhibition in muscle and brain respectively. These activities were not recovered after 8 days from exposure to this pesticide. It can be concluded that acetyl cholinesterase from those tissues was inhibited by small amounts of methyl parathion, and the main effect was observed in the brain.

Publisher

FapUNIFESP (SciELO)

Subject

General Veterinary,Agronomy and Crop Science,Animal Science and Zoology

Reference21 articles.

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2. Metabolical effects of Folidol 600® on the neotropical freshwater fish matrinxã, Brycon cephalus;AGUIAR L.H.;Environmental Research,2004

3. Acetyl cholinesterase action of methil parathion, parathion and azinphos methyl in mice and fish: onset and recovery of inhibition;BENKE G.M;Environmental Contaminant Toxicology,1974

4. The time course of inhibition of cholinesterase and aliesterase activities, and nonprotein sulfhydil levels following exposure to organophosphorous insecticides in mosquitofish (Gambusia affinis);BOONE J.S;Fundamental and Applied Toxicology,1996

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