Sentences with phrase «which polar bears»

Their findings are based on a study published in the Wildlife Society Bulletin, which claims a «perfect storm» is brewing in which polar bears will increase their appetite for human flesh.

The U.S. Department of the Interior announced on December 27 that it is proposing formally to list the polar bear as «threatened» with extinction, because rising Arctic temperature is causing the loss of sea ice, on which polar bears depend... Continue reading →

For some years now we have been exposed to mournful photographs of polar bears floating away on ice floes, or otherwise appearing endangered... The theory on which polar bears are supposed to be endangered because their environment is becoming more benign has never been entirely clear, nor has there been data to support the claim that their populations are declining.

This behavior likely derives from a shared genetic heritage with brown bears, from which polar bears separated about 600,000 years ago.

The most recent complicating factor is the discovery in Canadaâ $ ™ s High Arctic last year that the species from which polar bears evolved is moving in on its arctic cousinâ $ ™ s territory.

Increasing loss of Arctic sea ice is cutting back the platform of life on which all polar bears rely for successful feeding and breeding.

AND, models are pretty consistent that by the latter part of this century we will be living in a climate very different from that in which polar bears (and humans) have flourished.

Not exact matches

Desperate for some kind - any kind - of retail store in which to spend their money up in the frozen, polar - bear - infested land known as «Canada,» shoppers flocked to recently opened Target stores across the country, giving the U.S. retailer 86 million of their «loonies.»

In an age in which emotional narratives often trump facts, the polar bear became the icon of global warming hysteria.

John Kuhns dad was a polar bear and his mom was the corpse of a dead seal which makes sense because when it get's cold out side he likes to show off his bear arms.

The other Republicans and I opposed this proposal, as we felt that adding another $ 7 million in debt to the $ 3 million to which we had already agreed for the zoo's polar bear exhibit was not in the best interests of county taxpayers.

And researchers are not yet certain polar bears — which on ice lie in wait for, rather than chase after, prey — can do so on land.

Among the historical figures bound by the thematic thread of dna in journalist Sam Kean's new book are Charles Hapsburg, whose weak chin was the result of royal inbreeding, and a group of Arctic explorers who were poisoned by the Vitamin A in polar bear liver, which threw off their gene expression.

A new University of Washington study, with funding and satellite data from NASA and other agencies, finds a trend toward earlier sea ice melt in the spring and later ice growth in the fall across all 19 polar bear populations, which can negatively impact the feeding and breeding capabilities of the bears.

The study's results currently are used by the International Union for Conservation of Nature's polar bear specialist group, which completes assessments of polar bears and issues the species» conservation status.

In addition to polar bears, which were mostly hunted in winter, the Zhokhovians pursued reindeer hundreds of kilometers across vast plains.

The International Union for the Conservation of Nature (IUCN), which maintains the international «Red List» of threatened species, considers the polar bear «vulnerable» due to climate change - induced retreating sea ice.

These findings support satellite imagery as a tool for monitoring polar bears on land, which could potentially be applied to other Arctic wildlife.

One «growing phenomenon in the Arctic [is] polar bears foraging on land as their primary habitat, sea ice, retreats,» Kintisch writes, which makes field work even more dangerous, and difficult, than it would be otherwise.

«Now that we have a better understanding of polar bear energy expenditures during summer because of this study, we are analyzing additional data we collected which relates to their energy storage,» Whiteman said.

In this way, tiger sharks are similar to terrestrial carnivores, such as hyenas and polar bears, which will selectively scavenge when the opportunity arises.»

Collectively these studies, which have included green sea turtles, polar bears and monkeys, bring weight to the «hygiene hypothesis,» which theorizes that reduced exposure to microbes is contributing to the increase in autoimmune and allergic disease occurrence in Westernized nations.

«It is possible that Svalbard may have provided one such important refuge during warming periods, in which small polar bear populations survived and from which founder populations expanded during cooler periods,» argues biologist Charlotte Lundqvist of the University at Buffalo, The State University of New York, who is a co-author of the new study.

Regardless of how old the polar bear is as a species, or whether it's a species at all, the purpose of such studies is to gain a better understanding of the great white bear's ability to survive in the Arctic, which is now rapidly transforming as a result of accelerated global warming.

While keeping the rule — which limits use of the Endangered Species Act to curb emissions of greenhouse gases — Salazar held open the possibility of adding habitat protections for the polar bear later.

That could also explain modern polar bear's relative lack of genetic diversity, which appears to have been declining for 500,000 years.

This seems to relate to another BOEMRE project, in which researchers at the University of Alberta in Edmonton, Canada, are radio - tracking polar bears.

They concluded that, based on a median value across all scenarios, there's a high probability of a 30 percent decline in the global population of polar bears over the next three to four decades, which supports listing the species as vulnerable on the IUCN Red List.

«I've accepted that the loss of sea ice, not subsistence [hunting of the animal] or the oil and gas industries, is the reason for the threat to the polar bears,» which are already protected by the more stringent Marine Mammal Protection Act of 1972, Kempthorne said.

Given how mobile giraffes are, one would expect a lot of interbreeding, so the researchers were surprised by how different the DNA could be — some genetic differences greater than those between a grizzly and a polar bear, which are separate species.

The only scientific study that either side before me can find is one which indicates that four polar bears have recently been found drowned because of a storm.

Given these two parameters, the researchers predicted that Neptune, which bears similar polar hotspots, should generate transient polar cyclones that come and go, while Jupiter should have none.

Discussions about the consequences of the vanishing ice usually focus either on the opening up of new frontiers for shipping and mineral exploitation, or on the plight of polar bears, which rely on sea ice for...

«When we think of climate change having an impact on a mammal species, what comes to mind most immediately is an Arctic animal like the polar bear, which depends on sea ice to survive,» Helgen said.

As the team reports July 1 in the Proceedings of the Royal Society B, supposed yeti and bigfoot samples turned out to come from bears (brown, black and polar), horses, raccoons, one human, some canines (the test didn't narrow down if they were wolves or dogs), cows, sheep, a North American porcupine, a Malaysian tapir and a serow, which is a known animal similar to a goat or antelope.

In brown bears, the sequence of this gene varies from one bear to another, but all the polar bears surveyed have an identical version, with the exact same genetic code at nine variable spots in the gene, about half of which should change the function of the APOB protein.

Brown bears — some of which are called grizzlies — and polar bears are closely related and are even able to interbreed.

Global warming has caused big problems for polar bears, which depend on sea ice for access to the ocean so they can hunt seals and other prey.

As sea ice disappears, polar bears are being forced to hunt more on land, which brings them into conflict with humans and increases contact with brown bears.

We thought polar bears had neat tricks for conserving energy in lean periods, but it turns out they are not that thrifty, which could cause them trouble in the future

Researchers worry that the polar bears, which are already in trouble due to retreating Arctic ice, could suffer from lack of access to prime food sources.

(This status allowed the Administration to create a special rule exempting greenhouse gas emissions — which are, through global warming, melting the artic sea ice used by the polar bears for hunting — from regulation under the Endangered Species Act.)

The researchers attached tracking devices to 60 ringed seals and 67 polar bears overall, which allowed them to compare their movements before and after the ice collapse.

Thinner sea ice is getting pushed farther by Arctic winds, which makes polar bears walk more to stay in the same place, increasing their need for food.

Tracking experiments show female polar bears are increasingly giving birth on land rather than on pack ice, which brings them into «hybrid range» with grizzlies.

Sea ice is drifting faster in the Arctic — which means polar bears need to walk farther to stay in their native range.

However, Hailer says that the new results broadly tally with his team's findings, which also suggested that polar bears may have evolved much earlier than the 600,000 year mark.

Many of the techniques we considered would have likely yielded data difficult to interpret, without the fundamental knowledge of, for example, which proteins are expressed where in a polar bear.

The reason that many environmentalists fight to save the Arctic National Wildlife Refuge or the polar bears is not because they are sure that losing those things would cause the universe to become unhinged, but because they realize that humanity isn't smart enough to know which things are linchpins for the entire ecosystem and which are not.

The radiographed polar bears on this navy version — which by the way, reads as black on pink in real life — held the most appeal for me.