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La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	Mercury in the feathers of the Sparrowhawk (Accipiter nisus) from the Erz Mountains
Auteurs :	M. Weber, Auteur ; M. Niecke, Auteur ; K. Gedeon, Auteur ; H. Meyer, Auteur
Type de document :	Article
Dans :	Journal of Ornithology (142(3) JUL 2001)
Article en page(s) :	313-320
Langues:	Anglais
Résumé :	The present paper examines the concentration of mercury in 48 moult-feathers. (primaries and secondaries) of the Sparrowhawk from the Erzgebirge region (province of Saxony, Germany). The feathers were collected from 37 females between 1980 and 1998. Five feather-samples of museum-preparations, collected in the area of the federal state of Sachsen before 1930, serve to provide a comparison with times with a low Hg use. All samples were analysed by the Hamburg proton micro-probe. The mercury contents of the moult-feathers from the same bird showed relatively great differences (n = 3 female female). Only one female showed a clear reduction of the Hg concentration with the progressive moult of the primaries. The feather-samples, collected before 1930, contained 2.7 ppm, mercury (n = 5). The concentration increased in the eighties up to 22.6 ppm (n = 25) and decreased to 4.0 ppm in 1997/98. There was a reduction of the amount of mercury entering the environment as a result of human activities after 1990. Regional deviations of contamination were characteristic between the area of the city Chemnitz and the highly contaminated surroundings (1980-1990). The highest mercury concentration was established in the moult-feathers from the region of Niederwiesa-Floha-Falkenau (county Freiberg, 1990).

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