Jan 112012
 

The Duke University study tracked sea ice cover in all four harp seal breeding grounds of the North Atlantic. Since 1979, the ice cover decreased by up 6 percent each decade. In particularly low sea ice years, the scientists estimate that nearly all of the seal pups die. In 2011, up to 80 percent of baby seals were believed to have died, according to the department of fisheries and oceans.
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