Current Research interests Ecology, conservation, and management of large Arctic mammals focussing on polar bears. Interests centre on limiting and regulating factors of polar bear populations including habitat use, harvest effects, and predator-prey relationships. Current research includes assessment of the effects of climate change and toxic chemicals on polar bears. Ecology and Conservation of Northern Carnivores Large carnivore ecology, conservation, and management are the focus of projects in my lab. My interests are to conduct research to improve our understanding the ecology of large carnivores with specific reference to how they are affected by human activities. My research over the past 39 years has focussed on polar bears but I have a broad interest in all carnivores. My main focus is in Arctic and boreal ecosystems in cooperation with territorial, provincial, and federal government agencies.