Behaviour and characteristics of mating polar bears ( Ursus maritimus ) in the Beaufort Sea, Canada

摘要: The dynamic sea ice habitat of polar bears (Ursus maritimus) influences their mating behaviour because it makes the distribution mates unpredictable. Pronounced sexual dimorphism likely results from a polygynous system, where intrasexual competition between males reproductive access to females. We examine aspects in Beaufort Sea, Canada, 1970 2014 based on 135 breeding pairs observed March through May. Mean age paired females and was 9.7 11.5 years, respectively. Paired were older (by 2.2 years) had significantly higher mass (71 kg) than unpaired suggesting system which larger, dominant, potentially experienced monopolise Our binomial logistic regression suggested most important factor predicting pairing males, can be explained by correlation body size. labial development lone females, that swelling is heightened during mating. Taken together, these characteristics suggest bears, providing further insight into potential variation across range.