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Polar Bears by Mind Map: Polar Bears
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Polar Bears

What is happening to the polar bears?

The area covered by sea ice is melting in a very quick rate

Characteristics

Look most whitest when clean and in sunlight

Molt period usually begins in spring and complete in late summer

Their nose is black.

Polar bears have 42 teeth which they use for catching food.

Their tail is small it is about 7 to 12 cm long

have black skin under layer of blubber

male polar bear weigh around 775 to 1500 kilograms and some weigh more

females weigh 335 to 550 kilograms

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adult males can be as tall as 8 to 10 feet tall

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adult females can be as tall as 6 to 8 feet tall

cubs when first born look like a white rat

threats

toxins in their food supply

oil spill

loss of habitat

humans

Feeding

They eat young walruses

bearded seals

sometimes dead narwhal

beluga whales washed up on the shore

hooded seals

narwhals

Bowhead

favourite food and main prey the ringed seal

get seals while on surface when breathing

when seal comes to surface polar bear will spring and sink its jagged teeth in seals head

sometimes hunt by swimming beneath the ice

Habitat

They can be found in the Arctic, the U.S. (Alaska), Canada, Russia, Denmark (Greenland), and Norway.

live along shores

Life Span

only 43% of polar bear cubs make it through their first year

average life span of wild polar bear is 15 to 18 years

a new born polar bear weighs less than 700 grams

may go to early to mid late 30s

zoo polar bear in Canada lived up to 42

Interesting Facts

polar bears are at the top of the food chain

Ursus maritimus is the latin name for sea bear

there are 20 to 25,0000 polar bears world wide

when ice forms on ocean in cold weather many polarbears will go hunt seals except the pregnant females

polar bears spotted on sea ice hundred miles away from shore

A polar bear’s closest relative is the brown bear

they dog paddle with their face

swim average of 6 miles per hour

Range of the Polar Bear

the dark green area is where they live

Breeding

have breeding season

during midsummer in late march to late may

most women polar bear start to bread when ages three to seven

after first birth thay have intervals of 2 to 4 years in between breeding

pair only stay together for a week or more mating several times in breeding season

bears dont mate every year

make dens in earth and snowbanks

nurse for two and a half years

during that time they teach cubs how to hunt

twins are most common

Why are they endangered

Ice is melting because of global warning

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need ice to survive

no platform to stand on while catching seal

What can we do?

stop fishing in the Artic

Renewable energy

change light bulbs to CFLs

walk more or carpool

Reduce, Reuse, Recycle

reuse shopping bags

Bevavior

polar bears can stand

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average walking speed is 5.5 kph

when being chased they can run as fast as 40 kph for short distance

Polar bears aren't deep hibernators

The female polar bear's heart rate slows to about 27 beats per minute

When hibernating the female polar bear body temperature might drop to 35°C

Females fast throughout hibernation. theyusaully lose most or all of their fat

When not hunting, polar bears are often sleeping or resting

Biome

Polar bears live in the arctic region.

Status

they predict polar bears will disappear in 2030

polar bears were threatend in 2005

in May 2008 polar bears were beging to be under the endangered list

Resources

http://www.worldwildlife.org/species/finder/polarbear/polarbear.html

http://www.polarbearsinternational.org/polar-bears/bear-essentials-polar-style/polar-bear-basics

http://library.thinkquest.org/3500/polarbear.htm

http://www.seaworld.org/infobooks/polarbears/home.html