Heavy metals in the brain of long-tailed duck (Clangula hyemalis) wintering in the Pomeranian Bay,Poland |
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Authors: | Elżbieta Kalisińska Urszula Szuberla |
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Institution: | (1) Department of Zoology, Agricultural University, ul. Doktora Judyma 20, 71-466 Szczecin, Poland;(2) Department of Soil Sciences, Agricultural University, Szczecin, Poland |
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Abstract: | Males (n=34) and females (n=23) of long-tailed duck (Clangula hyemalis) collected on the southern coast of the Baltic Sea in winter were studied to determine brain tissue concentration of iron
(Fe), zinc (Zn), copper (Cu), manganese (Mn), and cadmium (Cd). There were no significant differences in the concentration
of metals between males and females, except for Cd, the concentration of which in male brains was twice that of the females.
In the brains of 20 birds (41% male and 26% female), the lead (Pb) concentration exceeded 1 μg/g wet wt. In all the duck brains
examined, Spearman correlation coefficients were significant and positive for Zn−Mn, Cu−Mn, Cu−Fe, and Pb−Fe; a negative correlation
was found for Pb−Zn. Additionally, female brains showed a positive correlation between Pb and Fe. The results obtained were
compared with literature data for diving and nondiving anseriforms and birds of other taxa. It seems that concentration of
heavy metals in the brain tissue of birds reflect natural adaptations (e.g., for diving) as well as effects of environmental
pollution. |
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Keywords: | Heavy metals avian brains anseriforms bioindication |
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