 |
| Picture Credit to: Encyclopedia Britannica Advocacy For Animals |
After industrial revolution began,
the earth's surface temperature increased rapidly causing sea ices to melt in
the Arctic. Ursus maritimus
(polar bears) also often refered to as "ice bear" are suffering for
this dramatic climate change. Polar bears populations are decreasing as
the temperature increase. They are starving because difficulties in hunting
ringed-seals- without sea ices. The book The last polar bear by Kazlowski shows polar
bears are skinnier and smaller than they were in 1990. In 1990 adult
male polar bears average weight was 810 pounds and now the average weight is
725 pounds, they were also older on average than the bears that were measured
before 1990. Stirling points
out this is the same with the female population, the average weight
declined about 143 pounds from 1980 to 2004 in Western Hudson
Bay. Starvation greatly impacts polar bears' reproductive and survival
rates; without enough foods female polar bears find it more difficult reproduce. Jim
Morrison states when female
polar bears become to lean they cannot to produce milk to nurse cubs and
the cubs die. If global warming is prevent, two-thirds
of the world's polar bears could disappear by 2050.
