PMID: 12758023May 22, 2003Paper

Variation of heavy metals within and among feathers of birds of prey: effects of molt and external contamination

Environmental Pollution
T DauweM Eens

Abstract

In this study we examined the effect of external contamination on the heavy metal (Ag, Al, As, Cd, Co, Cr, Cu, Fe, Hg, Mn, Ni, Pb and Zn) concentration in feathers. We compared the heavy metal content among the 10 primary wing feathers of sparrowhawks (Accipiter nisus), little owls (Athene nocta) and barn owls (Tyto alba) and the variation within the outermost tail feather of sparrowhawks and tawny owls (Strix aluco). The concentration of Hg was significantly higher in feathers molted first, suggesting that levels in feathers reflect levels in the blood during formation. For some other elements (Al, Co, Ni, Pb, Zn) on the other hand, there are strong indications that external contamination may have an important impact on the levels detected in the feathers. This should be taken into account in future monitoring studies.

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Citations

Aug 25, 2012·Bulletin of Environmental Contamination and Toxicology·Małgorzata Misztal-SzkudlińskaJacek Namieśnik
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