Polar bear populations are slowly shifting northward

January 8, 2015 11:41 PM

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"Gene flow occurs over generations, and would not be detectable by using data from satellite-collars," said Lily Peacock.

In analyzing the genetic makeup of local polar bear populations, scientists with the U.S. Geological Survey found that over the last three generations (beginning in the 1990s) polar bears have been slowly migrating north -- to the Canadian Archipelago, where there is sea ice year-round.

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