Dicofol residues in eggs and carcasses of captive American kestrels

Environmental Toxicology and Chemistry
By: , and 



American kestrels (Falco sparverius) were fed diets containing 0 (control), 1, 3, 10, and 30 ?g/g (wet wt) of Kelthane?. Residues of dicofol and its metabolites were then analyzed in the eggs and carcasses of females. Significant differences occurred among treatments for residues of both p,p'-dicofol and p,p'-dechlorodicofol (DCD) in both eggs and carcasses and for p,p'-dicholorbenzophenone (DCBP) in eggs. Residue concentrations increased with increasing treatment exposure. Residues of p,p'-dicofol, p,p'-DCD, and p,p'-DCBP in eggs were significantly correlated with eggshell quality parameters. Significant correlations also occurred among contaminants in eggs and for individual contaminants between eggs and carcasses. The lowest-observed-dietary-effect concentration for eggshell thinning was 3 ?g/g, whereas 1 ?g/g may be considered to be near a no-observable-adverse-effect concentration. Concentrations of dicofol in potential prey items and eggs of wild birds generally have been lower than dietary-effect concentrations or concentrations in tissues or eggs associated with eggshell thinning and reduced reproductive success.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Dicofol residues in eggs and carcasses of captive American kestrels
Series title Environmental Toxicology and Chemistry
Volume 20
Issue 12
Year Published 2001
Language English
Contributing office(s) Patuxent Wildlife Research Center
Description 2848-2851
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Environmental Toxicology and Chemistry
First page 2848
Last page 2851
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