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Diagnosis of anticholinesterase poisoning in birds: Effects of environmental temperature and underfeeding on cholinesterase activity

Environmental Toxicology and Chemistry

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Abstract

Brain cholinesterase (ChE) activity has been used extensively to monitor exposure to organophosphorus (OP) and carbamate (CB) insecticides in wild birds. A series of factorial experiments was conducted to assess the extent to which noncontaminant-related environmental conditions might affect brain ChE activity and thereby confound the diagnosis of OP and CB intoxication. Underfeeding (restricting intake to 50% of control for 21 d or fasting for 1-3 d) or exposure to elevated temperature (36 + 1?C for 1 d) caused only slight reductions (10-17%) in brain AChE activity in adult male Japanese quail (Coturnix coturnix japonica). This degree of 'reduction' in brain AChE activity is considerably less than the 50% 'inhibition' criterion employed in the diagnosis of insecticide-induced mortality, but nevertheless approaches the 20% 'inhibition' level used as a conservative estimate of sublethal exposure to a known insecticide application.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Diagnosis of anticholinesterase poisoning in birds: Effects of environmental temperature and underfeeding on cholinesterase activity
Series title:
Environmental Toxicology and Chemistry
Volume
1
Issue:
4
Year Published:
1982
Language:
English
Contributing office(s):
Patuxent Wildlife Research Center
Description:
329-335
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
329
Last page:
335
Number of Pages:
7