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Post by OldGreenGrolar on Jun 25, 2020 19:08:10 GMT -5
Reply 54, You have got a good point there. Many posters underrate the polar bear’s stamina. While it is true that they overheat outside their natural environment, they have swam and walked long distances more than any other bear in the world.
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Post by tom on Jun 25, 2020 19:08:22 GMT -5
Polar, long time no see. Welcome back.
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Post by OldGreenGrolar on Aug 31, 2020 10:08:09 GMT -5
They are these who do not understand why the polar bear's fur can turn green.
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Post by King Kodiak on Oct 11, 2020 10:28:17 GMT -5
SEXUAL DIMORPHISM OF POLAR BEARS
Abstract
Sexual dimorphism in body mass, body length, head width, head length, and foreleg guard hair length of polar bears ( Ursus maritimus ) was examined from live-captured polar bears in Svalbard, Norway. Limited evidence of sexual dimorphism was apparent in cubs shortly after den emergence but was marked after the 1st year of life. Sexual dimorphism in adults resulted from both a higher growth rate and prolonged growth period in males. In mature animals, sexual dimorphism was greatest in mass, followed by foreleg guard hair length, head width, body length, and head length. Foreleg guard hair length was age related and hypothesized to be a form of ornamentation. Geographic variation in sexual dimorphism was evident for mass and body length for seven different populations but there was no evidence of a hyperallometric relationship in sexual dimorphism.
FULL STUDY:
academic.oup.com/jmammal/article/86/5/895/2219068
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Post by King Kodiak on Oct 11, 2020 10:35:12 GMT -5
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Post by OldGreenGrolar on Nov 8, 2020 21:59:52 GMT -5
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Post by King Kodiak on Nov 8, 2020 23:19:44 GMT -5
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Post by OldGreenGrolar on Nov 9, 2020 1:56:54 GMT -5
THE TRUE COLOR IS YELLOW.We all know that this creature found in the coldest place part of the earth. They seems like cute but they are meat eaters.They can harm people and they eat fish too. What we saw on pictures and television are all true except their colors. There original color is yellow. They just turn into white because of the cold temperature that make there body white. The polar bear (Ursus maritimus) is a bear native largely within the Arctic Circle encompassing the Arctic Ocean, its surrounding seas and surrounding land masses. It is the world’s largest land carnivore and also the largest bear, together with the omnivorous Kodiak bear, which is approximately the same size. An adult male weighs around 350–680 kg (770–1,500 lb), while an adult female is about half that size. Although it is closely related to the brown bear, it has evolved to occupy a narrower ecological niche, with many body characteristics adapted for cold temperatures, for moving across snow, ice, and open water, and for hunting the seals which make up most of its diet. Although most polar bears are born on land, they spend most of their time at sea. Their scientific name means “maritime bear”, and derives from this fact. Polar bears can hunt their preferred food of seals from the edge of sea ice, often living off fat reserves when no sea ice is present. The polar bear is classified as a vulnerable species, with eight of the nineteen polar bear subpopulations in decline. For decades, large scale hunting raised international concern for the future of the species but populations rebounded after controls and quotas began to take effect. For thousands of years, the polar bear has been a key figure in the material, spiritual, and cultural life of Arctic indigenous peoples, and polar bears remain important in their cultures. almiraamoy.wordpress.com/2011/11/22/the-true-color-is-yellow/A polar bear is actually blond.
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Post by OldGreenGrolar on Nov 30, 2020 23:38:12 GMT -5
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Post by brobear on Dec 1, 2020 6:14:35 GMT -5
That's a tough one. Polar bear bite force is discussed somewhere within the tangled jungle of topic at shaggygod.proboards.com/ The topic was also discussed in the old AVA.
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Post by OldGreenGrolar on Dec 21, 2020 22:24:19 GMT -5
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Post by King Kodiak on Dec 21, 2020 23:21:05 GMT -5
Reply #70: that is a really great find mate! Awesome. Never seen that source before. Aside from the sentence you underlined, this is very interesting also:
Consequently, polar bears developed a distinctive gait. A rotary gait is a “double suspension” gait, meaning the animal bounces both off the hind limbs and then the fore limbs . This is contrasted from the grizzly bear’s transverse gallop, which involves only one “bounce,” — this loads each limb for a longer time and more vertically. The rotary gait improves stability, giving the polar bear the ability to travel quickly and smoothly on icy surfaces.
A series of drawings depicting the gait of a polar bear. Modified from S. Renous, J.P. Gasc, and A. Abourachid, Netherlands Journal of Zoology (1998).
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Post by OldGreenGrolar on Dec 21, 2020 23:25:50 GMT -5
/\That confirms my bold statement on the polar bear being the most agile of the bears. I was going to post that when I get on my computer later at night but you beat me to it. Thanks for saving my time 😉.
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Post by King Kodiak on Dec 21, 2020 23:31:04 GMT -5
/\That confirms my bold statement on the polar bear being the most agile of the bears. I was going to post that when I get on my computer later at night but you beat me to it. Thanks for saving my time 😉. Am not sure about the polar being the most agile bear though. That above is just an adaptation to travel on the ice faster and smoothly. Perhaps the most agile bears are the best tree climbers.
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Post by OldGreenGrolar on Dec 21, 2020 23:32:42 GMT -5
The best tree climber is the spectacled bear, therefore, you might be right. More correctly, the polar bear might be the most agile pound to pound?
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Post by King Kodiak on Dec 21, 2020 23:43:32 GMT -5
Well, aside from the Artic being treeless, adult polar bears cant really climb trees because of their size and their claws are not really adapted for that like Spectacled and black bears. But they can swim much better that's for sure. So each bear is agile for their purpose.
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Post by King Kodiak on Dec 21, 2020 23:45:47 GMT -5
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Post by OldGreenGrolar on Dec 21, 2020 23:53:44 GMT -5
No the adults are too heavy to climb but the cubs are able too just like the brown bear cubs.
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Post by King Kodiak on Dec 21, 2020 23:56:33 GMT -5
Cubs yes, but just barely i think, not the same as black bear cubs.
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Post by brobear on Dec 21, 2020 23:57:27 GMT -5
The best tree climber is the spectacled bear, therefore, you might be right. More correctly, the polar bear might be the most agile pound to pound? Too close to call. Both the Andean bear and the sun bear are arboreal bears. The moon bear has the greatest bipedal abilities.
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