Polar Bears

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Polar Bears by Mind Map: Polar Bears

1. What is happening to the polar bears?

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

2. Characteristics

2.1. Look most whitest when clean and in sunlight

2.2. Molt period usually begins in spring and complete in late summer

2.3. Their nose is black.

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

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

2.6. have black skin under layer of blubber

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

2.8. females weigh 335 to 550 kilograms

2.8.1. New node

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

2.9.1. New node

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

2.11. cubs when first born look like a white rat

3. threats

3.1. toxins in their food supply

3.2. oil spill

3.3. loss of habitat

3.4. humans

4. Feeding

4.1. They eat young walruses

4.2. bearded seals

4.3. sometimes dead narwhal

4.4. beluga whales washed up on the shore

4.5. hooded seals

4.6. narwhals

4.7. Bowhead

4.8. favourite food and main prey the ringed seal

4.9. get seals while on surface when breathing

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

4.11. sometimes hunt by swimming beneath the ice

5. Habitat

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

5.2. live along shores

6. Life Span

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

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

6.3. a new born polar bear weighs less than 700 grams

6.4. may go to early to mid late 30s

6.5. zoo polar bear in Canada lived up to 42

7. Interesting Facts

7.1. polar bears are at the top of the food chain

7.2. Ursus maritimus is the latin name for sea bear

7.3. there are 20 to 25,0000 polar bears world wide

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

7.5. polar bears spotted on sea ice hundred miles away from shore

7.6. A polar bear’s closest relative is the brown bear

7.7. they dog paddle with their face

7.7.1. swim average of 6 miles per hour

8. Range of the Polar Bear

8.1. the dark green area is where they live

9. Breeding

9.1. have breeding season

9.2. during midsummer in late march to late may

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

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

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

9.6. bears dont mate every year

9.7. make dens in earth and snowbanks

9.8. nurse for two and a half years

9.9. during that time they teach cubs how to hunt

9.10. twins are most common

10. Why are they endangered

10.1. Ice is melting because of global warning

10.1.1. New node

10.2. need ice to survive

10.3. no platform to stand on while catching seal

11. What can we do?

11.1. stop fishing in the Artic

11.2. Renewable energy

11.3. change light bulbs to CFLs

11.4. walk more or carpool

11.5. Reduce, Reuse, Recycle

11.6. reuse shopping bags

12. Bevavior

12.1. polar bears can stand

12.1.1. New node

12.2. average walking speed is 5.5 kph

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

12.4. Polar bears aren't deep hibernators

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

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

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

12.8. When not hunting, polar bears are often sleeping or resting

13. Biome

13.1. Polar bears live in the arctic region.

14. Status

14.1. they predict polar bears will disappear in 2030

14.2. polar bears were threatend in 2005

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

15. Resources

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

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

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

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