Dicofol residues in eggs and carcasses of captive American kestrels

Wiemeyer, S.N.; Clark, D.R., Jr.; Spann, J.W.; Belisle, A.A.; Bunck, C.M.

Abstract:

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.

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Article

ProdID:

5224255

Citation Author:

Wiemeyer, S.N.; Clark, D.R., Jr.; Spann, J.W.; Belisle, A.A.; Bunck, C.M.

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Patuxent Wildlife Research Center

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2851

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English

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Environmental Toxicology and Chemistry

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Citation Phsyical Description:

2848-2851

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6078_Wiemeyer.pdf

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Dicofol residues in eggs and carcasses of captive American kestrels; 2001; Article; Journal; Environmental Toxicology and Chemistry; Wiemeyer, S.N.; Clark, D.R., Jr.; Spann, J.W.; Belisle, A.A.; Bunck, C.M.