香港六合彩开奖结果现场直播

笔耻产濒颈肠补肠颈贸苍

Polar bears : proceedings of the 13th Working meeting of the 香港六合彩开奖结果现场直播/SSC Polar Bear Specialist Group, 23-28 June 2001, Nuuk, Greenland

Authors: Lunn, Nicholas J., Schliebe, Scott, Born, Erik W.,
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Abstract

These proceedings provide an overview of the ongoing research and management activities on polar bears in the circumpolar arctic. Together with the previous 12 proceedings, they provide an historic record of international efforts in protecting polar bears from over-harvest and document more recent concerns of threats arising from increased human activities in both the Arctic and in regions far beyond the realm of polar bears. More proactive management is needed to address limitations in the knowledge of population dynamics. New information indicates that the greatest future challenges to polar bear conservation may be ecological change in the Arctic due to climate change and pollution. The complex, global nature of the issues requires international cooperation and development of diverse, new approaches to address them.