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Acute toxicity of four anticholinesterase insecticides to American kestrels, eastern screech-owls and northern bobwhites

Environmental Toxicology and Chemistry

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Abstract

American kestrels (Falco sparverius), eastern screech-owls (Otus asio), and northern bobwhites (Colinus virginianus) were given single acute oral doses of four widely diverse anticholinesterase pesticides: EPN, fenthion, carbofuran, and monocrotophos. LD50s, based on birds that died within 5 d of dosage, were computed for each chemical in each species. Sex differences in the sensitivity of northern bobwhites in reproductive condition were examined. American kestrels were highly sensitive to all chemicals tested (LD50s 0.6--4.0 mg/kg). Eastern screech-owls were highly tolerant to EPN (LD50 274 mg/kg) but sensitive to the remaining chemicals (LD50s 1.5-3.9 mg/kg). Northern bobwhites were highly sensitive to monocrotophos (LD50 0.8 mg/kg) and less sensitive to the remaining chemicals (LD50s 4.6--31 mg/kg). Female bobwhites (LD50 3.1 mg/kg) were more sensitive to fenthion than males (LD50 7.0 mg/kg). Mean percent depression of brain cho[inesterase (ChE) of birds that died on the day of dosing exceeded 65% for all chemicals in all species. The response of one species to a given pesticide should not be used to predict the sensitivity of other species to the same pesticide. The need for research on several topics is discussed

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Acute toxicity of four anticholinesterase insecticides to American kestrels, eastern screech-owls and northern bobwhites
Series title:
Environmental Toxicology and Chemistry
Volume
10
Issue:
9
Year Published:
1991
Language:
English
Contributing office(s):
Patuxent Wildlife Research Center
Description:
1139-1148
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Environmental Toxicology and Chemistry
First page:
1139
Last page:
1148
Number of Pages:
10