That would cause a lot of problems for the Eskimos tho. Either the polar bears would multiply too easily or the Eskimos would get so used to years of easy blubber harvests before the winter that they'd have problems when the supply of fats runs out. If you've never seen anything about the Eskimos in especially northern Greenland, it's insane that they survive winters there never mind that they've been doing it for thousands of years without any of the comforts of life as we know it (they don't even see the damn sun for like 2 months)