Acute toxicity of four anticholinesterase insecticides to American kestrels, eastern screech-owls and northern bobwhites
Environmental Toxicology and Chemistry
By: Stanley N. Wiemeyer and D. W. Sparling
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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
Suggested Citation
Wiemeyer, S.N., and Sparling, D.W., 1991, Acute toxicity of four anticholinesterase insecticides to American kestrels, eastern screech-owls and northern bobwhites: Environmental Toxicology and Chemistry, v. 10, no. 9, p. 1139-1148, https://doi.org/10.1002/etc.5620100905.
| 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 |
| DOI | 10.1002/etc.5620100905 |
| Volume | 10 |
| Issue | 9 |
| Publication Date | September 01, 1991 |
| Year Published | 1991 |
| Language | English |
| Publisher | Society of Environmental Toxicology and Chemistry |
| Contributing office(s) | Patuxent Wildlife Research Center |
| Description | 10 p. |
| First page | 1139 |
| Last page | 1148 |