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Polar Bears conservation

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Introduction

Polar bears have usually been found to mate between April and May. Soon after fertilization, the embryo of the polar bear stops developing and floats inside the mother's womb for four or more months. This process, called delayed implantation, allows the mother to feed and build up enough body fat to survive eight months of hibernation. Females mate every other year, and cubs are born about every three years, generally in litters of two, but more and more cubs are dying because they cannot survive their first year. At birth, the cubs weigh approximately one and a half pounds. Their diets consist of mainly seal that they hunt or other close by animals, such as fish, seabirds, arctic hare's, reindeer and musk oxen. A large fully grown adult male weighs around 350-680 kg, while a smaller fully grown female is about half that size. The polar bear is a species of bear closely related to the brown bear, but evolution has changed certain characteristics so it can fit the 'narrow ecological niche' that it lives in. Its main body features are adapted for the freezing cold temperatures, moving across the cold, snowy and icy landscape, for swimming in open water and hunting. THREATS The World Conservation Union's Polar Bear Specialist Group has stated that polar bear populations could drop more than 30 percent in the coming 45 years. ...read more.

Middle

Positives of tracking bears Negatives against tracking bears - Polar bears are able to be seen wherever they go, and this enables scientists to follow their main routes to important resources. It also gives them and insight to the distances polar bears are able to move, and this includes where they can no longer go because of ice shortage. - Although this system allows scientists to see where the polar bears go, it doesn't necessarily help the bears. They are unable to be controlled by the collar, and they are also unable to know if a bear has died or has got rid of the collar. - another negative point is that not all bears are able to have tracking collars fitted, so only a few are actually being followed, this doesn't show the majority and where the go. As a top predator, polar bears are exposed to relatively high levels of pollutants through their food. Constant natural pollutants (Pops) range widely and include poisonous substances such as heat resistant chemicals (PCBs), industrial waste products such as dioxins and furans; and fertilizers and pesticides like DDT, dihedron and linden. Polar bears that have higher levels of some POPs have lower levels of vitamin A, thyroid hormones, and some antibodies. These are all important in the growth, reproduction and the ability to fight off disease stages of a bear's life. ...read more.

Conclusion

Bears are able to be studied, so we are able to find out more about them. The bears are able to be used to educate the public on what's happening to their landscape. There are no immediate threats while they are being cared for. Bears will most likely be unable to be released back into the wild because they will not be able to survive. Bears will never have the real life that they would have if they were in the wild. CONCLUSION Polar bears will inevitably be in danger or even extinct in the next century, because climate change cannot be stopped. It can be reduced though, and the only way to reduce this relies on the education of others, otherwise we could be faced with a modern dilemma of never seeing some of the most beautiful species of animal ever again. But will breeding programmes ever be enough for polar bears? Or is their future bleak and already visible? The answer relies with us, the public, humans - the ones who make the planet worse everyday. Polar bears do not deserve to suffer for things we are doing to them. They can't speak, they can't let us know if something's wrong, so we have to know - and we have to therefore fix it. It's simple enough, people survived thousands of years ago without power, without vehicles, oil, plastics, so why do we need to change now, and harm the world we live in. ...read more.

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