1. Department of Biology; Dalhousie University; Halifax; NS; Canada; B3H 4R2
2. Great Lakes Institute for Environmental Research; University of Windsor; Windsor; ON; Canada; N9B 3P4
3. Department of Biological Sciences; Arctic Research Centre; Aarhus University; Roskilde; DK-4000; Denmark
4. Ecotoxicology and Wildlife Health Division; Science and Technology Branch; Environment Canada; National Wildlife Research Centre; Carleton University; Ottawa; ON; Canada; K1A 0H3
5. Environment Canada; National Water Research Institute; Burlington; ON; Canada; L7R 4A6
6. Greenland Institute of Natural Resources; P.O. Box 570; Nuuk; DK-3900; Greenland