By Gloria Dickie TORONTO (Reuters) – Canada’s Western Hudson Bay polar bear population has fallen 27% in just five years, according to a government report released this week, suggesting climate change is impacting the animals. Every autumn, the bears living along the western edge of the Bay pass through the sub-Arctic tourist town of Churchill, Manitoba, as they return to the sea ice. This has made the population not only the best studied group in the world, but also the most famous, with the local bear-viewing economy valued at C$7.2 million ($5.30 million) annually. However, the Government o…