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Response and Recovery of Brain Acetylcholinesterase Activity in the European Eel,Anguilla anguilla,Exposed to Fenitrothion

Authors :
Encarna Sancho
Enrique J. Andreu
M.D. Ferrando
Source :
Ecotoxicology and Environmental Safety. 38:205-209
Publication Year :
1997
Publisher :
Elsevier BV, 1997.

Abstract

European eel (Anguilla anguilla) were exposed to sublethal fenitrothion concentrations in a continuous flow-through system for 4 days. Brain acetylcholinesterase (AChE) activity was evaluated after 2, 8, 12, 24, 32, 48, 56, 72, and 96 h pesticide exposure. Results indicated that AChE activity in eel brains decreased as the concentration of fenitrothion increased. The pesticide induced significant inhibitory effects on the AChE activity ofA. anguilla,ranging from >40% inhibition at a sublethal concentration of 0.02 ppm to >60% inhibition at a sublethal concentration of 0.04 ppm. Eel were exposed to both fenitrothion concentrations for 96 h and then allowed a period of recovery in pesticide-free water. Samples were removed at 8, 12, 24, 48, 72, 96, 144, and 192 h and eel brain AChE activity was evaluated. Following 1 week of recovery, the AChE activity of those animals previously exposed to 0.02 and 0.04 ppm fenitrothion was still different from that of the controls. So, the AChE activity of eel brains at the end of the recovery phase remained significantly depressed.

Details

ISSN :
01476513
Volume :
38
Database :
OpenAIRE
Journal :
Ecotoxicology and Environmental Safety
Accession number :
edsair.doi.dedup.....f28304a51ce20efa9d05900dc54dd298
Full Text :
https://doi.org/10.1006/eesa.1997.1579