Conservation History and Modern Threats

Key Insight

Polar bear conservation efforts intensified due to early fears of extinction. In 1956, Russians banned hunting, and Savva Uspenskii estimated only about 5000 bears globally, though American biologists suggested a higher figure of 17000 to 19000. By the mid-1960s, tremendous hunting pressure led to a reported kill of approximately 1300 bears annually, nearly 25 percent of Uspenskii's estimate. This urgency prompted a pivotal 1965 international meeting in Fairbanks, sponsored by the United States, which led to an international agreement for polar bear management and the subsequent formation of the IUCN Polar Bear Specialist Group in 1968, fostering shared research and coordinated management programs.

Research initiated by this group significantly advanced understanding, debunking earlier theories like bears following a clockwise ice movement around the Pole. Instead, it confirmed that polar bear populations are fairly discrete, demonstrating strong fidelity to specific winter seal-hunting grounds, summer retreats, and ancestral denning areas, such as the Owl River in Manitoba or Wrangel Island. International cooperation also fostered the development of advanced research techniques, including marking, relocating, and electronic tracking of bears, as well as detailed physiological studies that uncovered critical aspects of their heat regulation and blubber dependence.

Today, industrial development, not hunting, poses the greatest danger to polar bears. Scientists identify three primary areas of concern: environmental poisoning, as bears, being top predators, accumulate PCBs, heavy metals, and chlorinated hydrocarbons, with drilling and mining waste also proving lethal; disruption of female denning sites by intensive overflights, transportation corridor development, and repeated seismic surveys; and the potential impact of industrial development on the distribution of seals, consequently affecting bear populations. Efforts now focus on establishing 'no-activity zones' or 'zones of peace' and developing non-lethal deterrents, such as electric fences, to manage increasing human-bear encounters near industrial sites and settlements like Churchill, Manitoba, where bears historically gathered at garbage dumps.