Amstrup, S. C., I. Stirling, T. S. Smith, C. Perham and G. W. Thiemann, 2006: Recent observations of intraspecific predation and cannibalism among polar bears in the southern Beaufort Sea, Polar Biology, 29, 997-1002 Atkinson, S. N., I. Stirling and M. A. Ramsay, 1996: Growth in early life and relative body size among adult polar bears (Ursus maritimus), Journal of Zoology, London, 239, 225-234

Clarkson, P. L. and D. Irish, 1991: Den collapse kills female polar bear and two newborn cubs, Arctic, 44, 83-84 Comiso, J.C., 2002: A rapidly declining perennial sea ice cover in the Arctic, Geophysical

Research Letters, 29, 1956 doi 10.1029/2002GL015650 DeMaster, D. P. and I. Stirling, 1981: Ursus maritimus, Mammalian Species, 145, 1-7 Derocher, A. E., 2005: Population ecology of polar bears at Svalbard, Norway, Population Ecology, 47, 267-275

Derocher, A. E. and I. Stirling, 1995: Temporal variation in reproduction and body mass of polar bears in western Hudson Bay, Canadian Journal of Zoology, 73, 1657-1665 Derocher, A. E., D. Andriashek and I. Stirling, 1993: Terrestrial foraging by polar bears during the ice-free period in western Hudson Bay, Arctic, 46, 251-254 Derocher, A. E., 0. Wiig and M. Andersen, 2002: Diet composition of polar bears in

Svalbard and the western Barents Sea, Polar Biology, 25, 448-452 Garner, G. W., S. T. Knick and D. C. Douglas, 1991: Seasonal movements of adult female polar bears in the Bering and Chukchi Seas, International Conference on Bear Biology and Management, 8, 219-226 IUCN/SSC Polar Bear Specialist Group, 2006: Polar bears: Proceedings of the 14th Working Meeting of the IUCN Polar Bear Specialist Group, J. Aars, N. J. Lunn and A. E. Derocher (eds), IUCN, Gland, Switzerland and Cambridge Iverson, S. J., I. Stirling and S. L. C. Lang, 2006: Spatial and temporal variation in the diets of polar bears across the Canadian Arctic: Indicators of changes in prey populations and environment, in I. L. Boyd, S. Wanless and C. J. Camphuysen (eds) Top Predators in Marine Ecosystems, Cambridge University Press, Cambridge Kingsley, M. C. S. and I. Stirling, 1991: Haul-out behaviour of ringed and bearded seals in relation to defence against surface predators, Canadian Journal of Zoology, 69, 1857-1861

Mauritzen, M., A. E. Derocher and 0. Wiig, 2001: Space-use strategies of female polar bears in a dynamic sea ice habitat, Canadian Journal of Zoology, 79, 1704-1713 Mauritzen, M., A. E. Derocher, O. Pavlova and 0. Wiig, 2003: Female polar bears, Ursus maritimus, on the Barents Sea drift ice: Walking the treadmill, Animal Behaviour, 66,


Monnett, C. and J. S. Gleason, 2006: Observations of mortality associated with extended open-water swimming by polar bears in the Alaskan Beaufort Sea, Polar Biology, 29, 681-687

Obbard, M. E., M. R. L. Cattet, T. Moody, L. Walton, D. Potter, J. Inglis and C. Chenier, 2006: Temporal trends in the body condition of Southern Hudson Bay polar bears, Climate Change Research Information Note, 3, 1-8

Parks, E. K., A. E. Derocher and N. J. Lunn, 2006: Seasonal and annual movement patterns of polar bears on the sea ice of Hudson Bay, Canadian Journal of Zoology, 84, 1281-1294

Ramsay, M. A., and I. Stirling, 1988: Reproductive biology and ecology of female polar bears (Ursus maritimus), Journal of Zoology (London), 214, 601-634 Ramsay, M. A., R. A. Nelson and I. Stirling, 1991: Seasonal changes in the ratio of serum urea to serum creatinine in feeding and fasting polar bears, Canadian Journal of Zoology, 69, 298-302 Regehr, E. V., S. C. Amstrup and I. Stirling, 2006: Polar bear population status in the southern Beaufort Sea, U.S. Geological Survey Open-File Report 2006-1337, US Department of the Interior, US Geological Survey, Reston, VA Regehr, E. V., N. J. Lunn, S. C. Amstrup, and I. Stirling, 2007: Survival and population size of polar bears in western Hudson Bay in relation to earlier sea ice break-up, Journal of Wildlife Management, in press Smith, T.G. and B. Sjare, 1990: Predation of belugas and narwhals by polar bears in nearshore areas of the Canadian High Arctic, Arctic, 43, 99-102 Stirling, I. and E. H. McEwan, 1975: The calorific value of whole ringed seals (Phoca hispida) in relation to polar bear (Ursus maritimus) ecology and hunting behaviour, Canadian Journal of Zoology, 53, 1021-1027 Stirling, I. and C. L. Parkinson, 2006: Possible effects of climate warming on selected populations of polar bears (Ursus maritimus) in the Canadian Arctic, Arctic, 59, 261275

Stirling, I., N. J. Lunn and J. Iacozza, 1999: Long-term trends in the population ecology of polar bears in western Hudson Bay in relation to climate change, Arctic, 52, 294306

Stirling, I., E. Richardson, G. W. Thiemann and A. E. Derocher, in review: Unusual observations of attempted polar bear predation on ringed seals in the southern Beaufort Sea, Arctic

Stroeve, J., M. M. Holland, W. Meier, T. Scambos and M. Serreze, 2007: Arctic sea ice decline: faster than forecast, Geophysical Research Letters, 34, L09501, doi:

10.1029/2007GL029703 Waits, L. P., J. Sullivan, S. J. O'Brien and R. H. Ward, 1999: Rapid radiation events in the Family Ursidae indicated by likelihood phylogenetic estimation from multiple fragments of mtDNA, Molecular Phylogenetics and Evolution, 13, 82-92 Watts, P. D. and S. E. Hansen, 1987: Cyclic starvation as a reproductive strategy in the polar bear, Symposia of the Zoological Society of London, 57, 305-318

Part 5

The Potential for Accelerating Action to Limit Climate Change

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