Jan 31, 1998

A comparison of mercury levels in feathers and eggs of osprey (Pandion haliaetus) in the North American Great Lakes

Archives of Environmental Contamination and Toxicology
K D HughesK E Clark

Abstract

Osprey (Pandion haliaetus) eggs and chick feathers were collected for mercury analysis from nests at four Great Lakes study areas in Ontario (three "naturally formed" lakes in southern Ontario and one reservoir in northern Ontario) and two New Jersey study areas in 1991-1994. Adult osprey feathers were sampled from three Great Lakes study areas in 1991. Feathers sampled from chicks (approximately 28-35 days old) appear to be better indicators of local contaminant conditions since spatial patterns of mercury in known prey, yellow perch (Perca flavescens), also collected in these areas, were more similar to chick feathers than to eggs. Mercury levels were less variable in chick feathers than in eggs. Estimates of biomagnification factors using prey of known size at these areas were also less variable in feathers than in eggs. At naturally formed lakes, no significant correlation in mercury levels between eggs and chick feathers from the same nest was apparent, suggesting that the source of mercury contamination was not the same in these two tissues: mercury levels in eggs reflect mercury acquired on the breeding grounds, wintering grounds, and migratory route; mercury levels in chick feathers reflect local dietary conditions on t...Continue Reading

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Mentioned in this Paper

Mercury
Feathers
PIGY
Aves
Pandion haliaetus
Mercury Analysis
Perca flavescens
Environmental Pollutants
PYURF gene
Egg Food Product

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