The Polar Bear as a Biological Indicator of the Environmental Mercury Burden

• Published in: ARCTIC
• Main Authors: Eaton, R.D.P., Farant, J.P.
• Format: Article in Journal/Newspaper
• Language: English
• Published: The Arctic Institute of North America 1982
• Subjects: Animal food; Mercury; Polar bears; Toxicity; Canadian Arctic Islands; Manitoba; Northern; Arctic; ours polaire; polar bear
• Online Access: https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65397

128 fresh (current) and 18 preserved (museum) polar bear hair samples were subjected to mercury analysis. Mercury levels ranging from <0.5-44.3 ppm were observed in the fresh samples with a geographic distribution showing higher levels in the western Arctic and substantially lower levels in the eastern Arctic and in Hudson's Bay. A similar geographic range and distribution was found in the museum specimens. No correlation can be demonstrated between observed levels and industrial releases of mercury. There is no real indication of increase in general levels over time. The source of observed high levels of mercury in arctic marine fauna appears to be geologic rather than industrial.Key words: mercury, polar bear Mots clés: mercure, ours polaire