Презентація Power Point "Polar bears"

Polar bears

Type: Mammal. Diet: Carnivore. Average life span in the wild:25 to 30 years. Size: Head and body, 7.25 to 8 ft (2.2 to 2.5 m); Tail, 3 to 5 in (7.5 to 12.5 cm)Weight:900 to 1,600 lbs (410 to 720 kg)Size relative to a 6-ft (2-m) man: I’m handsome^_^

Polar bears. Polar bears live in one of the planet's coldest environments and depend on a thick coat of insulated fur, which covers a warming layer of fat. Fur even grows on the bottom of their paws, which protects against cold surfaces and provides a good grip on ice. The bear's stark white coat provides camouflage in surrounding snow and ice. But under their fur, polar bears have black skin—the better to soak in the sun's warming rays. Z-z-z-z-z…

Polar bears roam the Arctic ice sheets and swim in that region's coastal waters. They are very strong swimmers, and their large front paws, which they use to paddle, are slightly webbed. Some polar bears have been seen swimming hundreds of miles from land—though they probably cover most of that distance by floating on sheets of ice. Br-r-r-r-r-r!

These powerful predators typically prey on seals. They love to eat seals. It is mostly easy to catch and sneak up on for polar bears. Some descriptive traits are that polar bears have 42 teeth. M-m-m… YUMMY!

Hunting. Hunters commonly used teams of dogs to distract the bear, allowing the hunter to spear the bear or shoot it with arrows at closer range. Almost all parts of captured animals had a use. The fur was used in particular to sew trousers and, by the Nenets, to make galoshes-like outer footwear called tobok; the meat is edible, despite some risk of trichinosis; the fat was used in food and as a fuel for lighting homes, alongside seal and whale blubber; sinews were used as thread for sewing clothes; the gallbladder and sometimes heart were dried and powdered for medicinal purposes; the large canine teeth were highly valued as talismans.

Agreements have been made between countries to co-manage their shared polar bear subpopulations. After several years of negotiations, Russia and the United States signed an agreement in October 2000 to jointly set quotas for indigenous subsistence hunting in Alaska and Chukotka. The treaty was ratified in October 2007.