Oceanologists explained why whales return year after year to Cumberland Bay. It turned out that in this place warm water and a lot of stones, which it is convenient for the whales to itch, this helps them shed.
Each summer, bowhead whales sail to the Cumberland Bay, off the southeast coast of Baffin Island. Inuit and whalers knew about this a hundred years ago, but there was still no explanation for this behavior of whales. Sarah Fortune, a graduate student at the British Columbia Ocean Institute, has been watching animals for years. From the boats where Fochun and her colleagues, the whale specialist William Koski (William Koski) and the local Inuit fishermen, swam to the whales, it was clear that the animals were tumbling in the water and behaving differently than usual.
To understand the behavior of whales, shooting from the drone helped; the angle of view made it possible to see large boulders at the bottom, about which the whales were rubbed by bodies. On the video, scientists also saw fragments of dead whale skin; oceanologists came to the conclusion that whales use the underwater stones of the bay as a rigid sponge or pumice stone.
About how large marine mammals are molting, almost nothing is known. Most likely, this happens when seasonal migrations lead animals in the water area with warm water; it helps exfoliate dead skin. In addition, in warm waters, metabolism proceeds faster, which can also accelerate molting.
A global trend towards warming of the water in the ocean can affect the timing and rate of moulting in marine mammals. Fochun and Koski believe that the rate of molting can determine the routes of whales on a par with changes in the composition and quantity of plankton, also associated with warming.