20 Things You Didn’t Know About … Bears

1. With territories stretching from Arctic ice to south of a equator, the
eight members of Ursidae embody a planet’s largest land predators — and
a severely rough family tree.

2. For decades, researchers have struggled
to draft a expansion of bears. A genomic research published in Scientific
Reports
in Apr explained why: Gene upsurge between opposite class is
common and can outcome in fruitful hybrids.

3. You might have listened about
pizzlies and grolars, a brood of grizzlies and frigid bears, though other
species, such as a object bear and Asiatic black bear, also hybridize in the
wild.

4. Bears’ backstory might seem perplexed given they are a many recent
carnivore origin to evolve, bursting off from canids usually 20 million to
25 million years ago.

5. The subfamily Ursinae, that includes 6 of the
eight vital bear class today, is even younger, elaborating a small 2 million
to 5 million years ago. The non-ursine bears, a hulk panda and
spectacled bear, separate off a line earlier.

6. The spectacled bear,
Tremarctos ornatus, has a robe of going a possess way. It’s a only
Southern Hemisphere bear, job a Andes home and occupying a operation of
habitats, including elevations some-more than 15,000 feet above sea level.

7. T.
ornatus
, that can import adult to 385 pounds, is a final vital short-faced
bear, a origin that includes a largest bear class known: a extinct
Arctotherium angustidens.

8. A. angustidens called South America home about
a million years ago and weighed an estimated 1,500 pounds — that’s almost
twice a physique mass of a normal frigid bear.

9. Both A. angustidens and
today’s frigid bears are carnivores, though many other bears are omnivorous.
The difference is a hulk panda, that sticks to bamboo 99 percent of the
time.

10. And Winnie a Pooh aside, sugar is not a primary food source
for any bear. Even a object bear and languor bear, both infrequently called honey
bears, feed mostly not on a honeyed things though on insects — including bees —
and fruit.

11. Let’s put another bear-faced lie, or during slightest a common myth,
to rest: Bears don’t hibernate. At least, they’re not loyal hibernators,
like belligerent squirrels, that reduce their metabolic rate by some-more than 90
percent in winter months.

12. Instead, northern embodiment bears enter periods
of dormancy, shortening their metabolic rate adult to 50 percent and lowering
both heart rate and physique temperature.

13. The animals are still easily
roused, however, and typically are watchful about 15 mins a day during this
period. But distinct a tellurian on bed rest for, say, 6 months, bears in
dormancy don’t knowledge serious flesh atrophy.

14. That’s expected interjection to
their bodies’ singular ability to reabsorb a rubbish product urea and recycle
it into protein that preserves gaunt physique mass.

15. Ursidae, incompatible the
giant panda, are also a usually mammals with poignant amounts of
ursodeoxycholic poison (UDCA), that is constructed in a liver and stored in
the gallbladder. In strong form, UDCA can be used to provide gallstones
and some ongoing liver diseases.

16. Although researchers have been
synthesizing UDCA given 1955, bear bile and gallbladders sojourn a popular
traditional medicine part in East Asia. A 2014 Interpol assessment
estimated farms — both authorised and bootleg — hold 13,000 bears in inhumane
conditions for bile harvesting.

17. Wild bears are wanted for their
gallbladders, as good as other parts. Species targeted embody a polar
bear, already underneath hazard due to meridian change: Shrinking sea ice makes
it harder for a animals to hunt seals, their categorical food source.

18. Climate
change is inspiring brownish-red bears, too. A PNAS investigate in Jul documented a
shift in an whole food web on Alaska’s Kodiak Island: Local bears switched
from eating salmon to elderberries when warmer temps caused a fruits to
ripen prematurely.

19. The bears had formerly gobbled adult to 75 percent of
the salmon race any year; researchers trust a change will have
broad consequences, including increasing salmon numbers disrupting the
marine food chain.

20. Through meridian change, medium loss, poaching and
other pressures, 6 of a 8 vital bear class are listed as
“vulnerable.” And a destiny but them would be, well, unbearable.

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Posted by on Nov 22 2017. Filed under Environment. You can follow any responses to this entry through the RSS 2.0. You can leave a response or trackback to this entry

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