Heavy metals and high pup mortality in the Saimaa ringed seal population in eastern Finland |
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| Authors: | Heikki Hyvärinen Tero Sipilä |
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| Institution: | Department of Biology, University of Joensuu, Finland |
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| Abstract: | Hair nickel, mercury, cadmium, lead and chromium concentrations were measured from still-born ringed seal pups and from other ringed seal groups from Lake Saimaa in Finland. Nickel concentration was significantly higher in the hair samples of still-born pups as compared to live-born pups and to adult seals. There was assumed to be some connection between the stillbirth of the pups and nickel concentration of the hair. Mercury concentration of the natal hair of pups was significantly higher than the mercury concentration of the first adult hair but no clear connection between stillbirth and mercury pollution was observed. No differences were observed in cadmium, lead and chromium concentrations of the hair of still-born and other ringed seal groups. |
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