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Polar bear

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Polar bear
Polar bear.jpg
Scientific Classification
Scientific Name

Ursus maritimus

The Polar Bear or the Ursus maritimus its scientific name, is a bear that's native to the colder areas in the arctic sea. They are extremely big, with the males getting up to 900 pounds and 6 feet tall. The Polar Bears live for 25 to 30 years. They are really unique in the way they are structured as well, with claws that help them paddle on the ice. They also can travel at high speeds of 25mph. The Polar bears need fur to protect them from the amount of cold there is in their habitat. [2]

Body Design

Polar Bears fur

The Polar bear has an abundant body design. The male and the females are extremely big animals, and are the largest land carnivore in the world. The male which are called boars are 350kg to more than 650kg. While the female, which are called Sows are 150kg to 250kg, but when sows are pregnant can be up to 500kg. The polar bear has a long head and neck compared to other bears, but their head and necks are small compared to its body. The body of the average Polar bear is 10ft, but the largest ever recorded in history is 12ft. The polar bear can be 3 colors depending on the angle of the sun, it can be light brown, white or yellow. The Polar bear's fur, which is shown in the picture, is thick compared to other bears. They also provide warmth and protection for the bear.[3]

The most unique part of the Polar Bear body design is it's claw. The claw is very sharp,and they are 30cm (12in) in diameter. They are designed to help make it easy for them to travel on snow and the ice, and to catch prey. The feet and their claw helps them distribute the weight when they walk. It also helps them when they are swimming. The Polar Bear have 42 sharp teeth, which they obviously use for catching food, but most of the food they eat are swallowed in chunks not chewed much. The most keenest sense in the Polar Bear is the sense of smell.They use smell to catch prey and see if any possible danger is near. They are able to smell from a mile away. The Polar Bear has an abundant body design, but it has a lot of fascination parts to it [4]

Life Cycle

New born Polar Bear

The female has to be six years old to be fully mature to reproduce. From late March to late may the mother has to find breeders. The male Polar bears come in packs, and can often follow the mother for 60 miles. The mother chooses one male polar bear that she likes, then they enter the stage of breeding. The will spend 7 to 14 days breeding, during this time period the female eats a lot, and can often gain 440 pounds. She does this because the egg will not implant without significant weight gained. During the months of June to Mid September the female does not eat very much for two reasons. One is in the stage of breeding she eats a lot and, she needs to fast, and secondly the polar bear's primarily source of food, which is ring seals, is not available. The female goes through a lot in these 4 important months.[5]

In the month of November and December the females build dens to hibernate, and give birth to their young. The female gives birth in this month, and the baby are incredibly small. Most female born either single or triplets. From January to mid March the family emerges from the den, and the baby is started to develop its muscles. The female go through a long year starting in late March and ending the next year in mid March. The life cycle the polar bear is interesting and has many unique parts to it.[5]

Ecology

Polar Bear breaking ice so it can swim

The Polar Bear Ecology is very unique in its own ways. The Polar Bears obviously have some abiotic requirements that they need.The Polar Bears swim, and have nostrils to prevent water from going into their noses. They have paws to help move them through the water really easily. One of the things the Polar Bears do in the water is catch seals. The Polar Bears have extremely strong jaws that they can rip the seals head of in an instant. One of the main things the Polar Bears do while caring for their cubs is teaching them how to swim and catch the prey. As you see in the picture the Polar Bear is crushing the ice to get into the water which is underneath the ice. [6]

The Polar Bears prey on seals and a few other animals in the water. The Polar Bears are at the top of their food, chain which mean they don't get preyed on by other animals, but Polar Bears often do get killed by male Polar Bears, People, and Global Warming. So when the female Polar Bears are deciding that they want to mate with a male Polar Bear there has to be a completion to see who can impress the lady. This is where all the drama happens, sometimes males who lose get very upset and injure the male and the female that will soon be mating.

Some people hunt Polar Bear for fun or sports. Though it is illegal to do so, it is sometimes done without anyone knowing. The third cause of Polar Bears death is Global Warming. We the people are releasing bad stuff into the environment which do affect the Polar Bear, because of Global Warming they are losing sea ice which is their main habitat. The Polar Bears are fascinating, unique animals.[7]

Habitat Range

Where Polar Bears live in the world

Polar bear live on 3 distinct habitats. The first one they live on is sea ice. Polar bears live the majority of their lives on sea ice for the main reason of hunting especially seals, and other reasons are for migrating and breeding. One of the main issues that is happening to the Polar Bear is the disappearance of sea ice. Sea ice is disappearing for a couple of reasons, one is climate change. Climate change affects these habitats the most. With the disappearance of sea ice, the Polar Bear population is decreasing more and more as the year goes on, and some believe in may go extinct.[8] The 2 other habitats they live in is Leads and Polynyas. Leads are cracks through the ice, the cracks can be open from a few minutes to a couple months. Polynyas are in the water that are open throughout the year, they use it for breathing and feeding.

The areas in the world in which they live in are very cold. Some countries are Canada, specifically western Hudson Bay, and in northwestern Ontario and James bay. Its been found In Greenland and Norway. Some Polar Bear footprints have been spotted in as far as the pole, but scientist that there were only a few Polar Bears. All of the other countries that have been seen is in the picture. Polar Bears are interesting in the way the live and where they live.[9]

Video

Polar Bears Mom and Cubs....

  1. Ursus martimus WikiSpecies. WikISpecies. last modified November 3, 2016.
  2. .Polar Bear "National Geographic" .National Geographic. Web. Accessed January 17, 2017. Author Unknown.
  3. Polar Bear Physical Characteristics Seaworld. No author accessed January 15, 2017.
  4. .Polar Bear Anatomy "Polar Bear World. Web. No author No date of publication or last updated.
  5. 5.0 5.1 .Life Cycle of the Polar Bear Artic Kingdom. Web. Last updated in 2017. Author Unknown.
  6. .Polar Bear Weebly. Web. Accessed January 15, 2017 no author .
  7. .Polar Bear Predator "Polar Bear World" .Polar Bear World. No author accessed January 15, 2017 .
  8. .Polar bear Habitat "WWF". Wed. last updated in 2016.
  9. .Habitat and Distribution Sea World . Web. Last updated in 2017. Author Unknown.