Portee,

don't be so pessimistic on polar bears, a new study shows that there are more ploar bears than ever; you know they swim around in the open ocean jumping on ice floating around, hunting seals

Occasionally they end up in New Foundland, then have to swim across to Labrador and then head up north. Those unfortunate ones who end up on the wrong piece of ice and float down to Island tend to get shot. The key is to pick the right piece of ice(or stock)