How whales change the old skin for a new one?
Source:Whales are among the largest animals on our planet, because the length of their body is usually about 25 meters and weight up to 90 tons. Despite the fact that these mammals are known since very ancient times and even mentioned in myths and legends, scientists are still many of them do not know. For example, only recently researchers from the U.S. state of Hawaii managed to capture on video what a cunning way to whales on the huge schools of fish. However, scientists are also very interested in what these huge establishment annually swim from the cold waters in warm overcome more than 20 thousand kilometers. This migration requires a lot of effort, but it turned out that mammals just need to go to such lengths to change the skin, and die from disease.
About a new discovery scientists from the us state of Oregon was described in a scientific journal . Previously, scientists believed that the cold waters of the Arctic and Antarctic whales only hunt and gather strength, and for the reproduction and nursing of offspring swim in the warm regions of our planet. However, during observations of 60 whales with sensors, scientists have noticed that some individuals per month across tens of thousands of kilometers. And in the cold regions of our planet young whales were discovered much more than warm. This means that in warm countries they are sailing is not a breed, but a completely different reason.
Why do whales migrate to warmer climes?
According to head of research Robert Pitman, whales swim to warmer climes in order to change old skin for new. This, at least according to the traces of discarded old skin in the warm waters of our planet. The assumption seems quite realistic, because the process of changing the skin of whales only runs warm environment, and in cold water it stops. It is known that on the territory of the Arctic and Antarctic on the old skin of whales formed layers of algae, which are breeding grounds for harmful bacteria.
Scientists believe that the slowdown in the process of changing the skin of whales is due to the fact that in the cold water, their blood vessels constrict to preserve body heat. Together with the slowing of blood circulation is slowed and the recovery process of the skin. Perhaps swim in the warm waters is due to the fact that they need to expand the blood vessels and allow the body to lose the old cover with pathogenic bacteria. This assumption seems to be closer to the truth than the theory that whales swim thousands of miles for breeding.
Whales protect themselves from the cold by narrowing the blood vessels
Actually, scientists are puzzling not only the mysterious migration of whales. Im also not clear on what causes some types of fish gather in certain places. For example, the first year, scientists noticed that the white sharks gather annually in the same place off the coast of Australia. One would assume that the predators just want to enjoy living in these parts of the seals. Only now they are for some reason going to this place even in summer when there is almost no food. Read more about the mysterious movement of white sharks can be found in our .
Whales, and snakes, are able to drop old skin
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