1. Science and Technology Branch, National Wildlife Research Centre, Environment Canada, Carleton University, Ottawa, Ontario K1A 0H3, Canada, Department of Chemistry, Carleton University, Ottawa, Ontario K1S 5B6, Canada, Section of Contaminants and Marine Mammals, Department of Arctic Environment, National Environmental Research Institute, University of Aarhus, Frederiksborgvej 399, P.O. Box 358, DK-4000 Roskilde, Denmark, Greenland Institute of Natural Resources, P.O. Box 570, DK-3900 Nuuk, Greenland,...