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Effects of heptachlor on American kestrels in the Columbia Basin, Oregon

Journal of Wildlife Management

By:
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Abstract

Wheat seeds treated with heptachlor to control wireworms (Ctenicara pruinina) resulted in American kestrels (Falco sparverius) in the Columbia Basin accumulating residues of heptachlor epoxide (HE) that reduced productivity and caused some adult mortality. The kestrel is more sensitive to HE residues in eggs than the Canada goose (Branta canadensis moffitti), i.e., reduced productivity occurs at > 1.5 ppm in kestrel eggs vs. > 10 ppm in Canada goose eggs. Neither kestrel eggshells nor Canada goose eggshells were thinned by HE. The reduced use of heptachlor in 1979, because of a partial ban, resulted in an immediate lowering of HE concentrations in kestrel eggs the following year.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Effects of heptachlor on American kestrels in the Columbia Basin, Oregon
Series title:
Journal of Wildlife Management
Volume
47
Issue:
4
Year Published:
1983
Language:
English
Contributing office(s):
Patuxent Wildlife Research Center
Description:
1080-1087
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of Wildlife Management
First page:
1080
Last page:
1087