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Extrapolating laboratory avian toxicity data to free-living birds: Comparison of the toxicity of parathion to captive and free-living European starlings

Society of Environmental Toxicology and Chemistry, annual meeting abstract book

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Abstract

In 1985 and 1986, we captured nesting wild female European starlings with young 8-10 days of age. Birds were weighted, banded, and given one of four dosages of the OP insecticide parathion (50, 72, 104 or 150 mg/kg dissolved in corn oil) or pure corn-oil (control). and their young weighed. Nest boxes (7- 12/treatment) were observed and young re-weighed 2-3 days postdose to determine presence/absence of the females. If necessary, males were captured and fate of young used to confirm female response. Brain ChE inhibition in dosed birds (based on a pilot study) was 55-74%. EC50's (failure to return to nest box) for the females was 74 mg/kg in 1985 and 92 mg/kg in 1986. Confidence limit (95%) for these estimates overlapped LD50's for captive female starlings dosed with the OP in spring and early summer 1987 (136, 128 mg/kg, respectively). Results suggest that responses of captive and free-living birds to potentially lethal concentrations of OP's are similar, despite the additional stresses in the wild.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Extrapolating laboratory avian toxicity data to free-living birds: Comparison of the toxicity of parathion to captive and free-living European starlings
Series title:
Society of Environmental Toxicology and Chemistry, annual meeting abstract book
Volume
14
Year Published:
1993
Language:
English
Contributing office(s):
Patuxent Wildlife Research Center
Description:
77 (abstract no. 248)
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Society of Environmental Toxicology and Chemistry, annual meeting abstract book
First page:
77 (abstra