The study suggests that as Arctic sea ice diminishes and becomes more fragmented, it will further impact the energetic balance of polarbears by reducing their access to seal prey and by increasing their cost of travel.
For their research, the scientists spied on the polar bears by equipping nine female white giants with tracking collars that had video cameras and the bear equivalent of a Fitbit during three recent springs. And the authors of the current study predict "higher mortality rates" for polar bears as sea ice continues to disappear.
While four bears put on weight, five bears lost up to 10 per cent of their body weight - between 18 and 20 kg - in 10 days. Polar bears rely on seals for their enormous caloric needs-the four bears that lost 10% of their weight didn't catch a single seal during the study and relied on scavenging-and sea ice is pretty much a requirement for polar bears to catch seals.
And they should lobby the global community more to address greenhouse gas emissions, which threaten the polar bears' habitat. A new study shows some polar bears in the Arctic are shedding pounds during the time they are supposed to be beefing up.
Four of the bears, mostly the older ones, did gain as much as 10 percent of their body mass over the study period.
"We now have the technology to learn how they are moving on the ice, their activity patterns, and their energy needs, so we can better understand the implications of these changes we are seeing in the sea ice", he said. "This study identifies the mechanisms that are driving those declines by looking at the actual energy needs of polar bears and how often they're able to catch seals".
Arctic sea ice is getting thinner every year, and there have been significant losses in the overall area covered by ice, according to the latest data. They were living on the sea ice of the Beaufort Sea, off the northern coast of Alaska. "Global warming is melting the ice so it has a chain reaction on how polar bears can survive". They also injected the bears with water labelled with stable isotopes of hydrogen and oxygen.
The GPS told them the distances the bears wandered, and the video camera recorded if the bears were successful in killing and eating prey. The study shows If the bears don't eat that amount of food, they will lose weight quickly.
Polar bears have been listed as endangered species by the US Fish and Wildlife Service, and the protection program repeatedly emphasizes the importance of climate change.
Polar bears could be sliding towards extinction faster than previously feared, with the animals facing an increasing struggle to find enough food to survive as climate change steadily transforms their environment. The researchers could compare this with the bears' activity and hunting success.
Lead scientist, Anthony Pagano, does note that the findings of the Beaufort Sea shouldn't necessarily be expanded to the other 18 circumpolar populations of bears where he says, conditions can differ for each group. As they move greater distances, they use up more energy which they find harder to replenish, for which the primary source is seals.
Although it's just a 10-day snapshot, the study confirms that polar bears aren't made for walking, said Andrew Derocher, Canada's leading polar bear expert and a professor at the University of Alberta.
Most of the time the bears tracked in the study did use the "sit and wait" technique. So by taking blood and urine samples before and after the observation period, the researchers could track how much the polar bears had been working.
Thurman, someone he considers a colleague and a friend, waited 25 years to make these allegations public, noting that he and Ms. Not long afterward, Weinstein attempted to force himself on her again at the Savoy Hotel in London, Thurman said.
Clouds will be building from midday on, while the southwest winds take temps back to normal and even slightly above normal levels. Bank Stadium which is a covered dome, but during pregame time fans outside will have to deal with single digit temperatures .
It's no surprise Meghan handled the hard moment so well - after all, she's been in the spotlight for most of her adult life. Markle took to the stage to hand out an award, telling the crowd: "I'm truly privileged to be here".
And since this was just the one whale, the researchers are unsure whether there are more copy-cat killer whales in the wild. The project is delightful, showing that killer whales can pick-up and reproduce novel sounds to a striking degree.
In addition, of course, there's an impending core Pokémon game, that should see sales of the system skyrocket even more. Kimishima is aiming for more than 20 million units next fiscal year, he said at a news conference Wednesday.
"Something I'm very proud of: African American unemployment stands at the lowest rate ever recorded", Trump bragged. Trump's State of the Union address was not the first time he touted the low African-American unemployment rate.
But, the friendly skies can be notoriously hard on pregnant women in particular, and Khloe Kardashian is no exception. Khloe's little sister Kendall also posted a tribute, as the model said she'd "forever miss her kisses".
She adds, everyone should wash their hands with soap and water for at least 20 seconds and to do not forget to cover their cough. It can be a miserable but relatively mild illness in many people, and a more severe illness in others.
A student who was in the class when shots rang out said he thought the gunfire was an accident, CNN affiliate KABC reported. LAPD Detective Meghan Aguilar said a suspect - a female student - is in custody, adding that a weapon has been recovered.
The latest expansion to genre-defining MMORPG World of Warcraft will be released later this Summer, Blizzard has confirmed. The Standard Edition of the expansion will be $49.99, but the Digital Deluxe Edition offers a bit more for $69.99.
As Ourand said in his tweet, Amazon ran the digital package previous year , but those rights are still undetermined for 2018. The network and the league are working out an agreement on the broadcast package, Bloomberg reported.
USA missile defense test failed in Hawaii
The official was not authorized to discuss the outcome and spoke on condition of anonymity. It is unclear why the test failed and an analysis is under way, the official said.
Star Wars Battlefront II microtransactions are coming back
EA's stock price went up on Monday after the Polygon news site reported that EA may be the target of a Microsoft acquisition. But a year ago, EA released Battlefield 1 and Titanfall 2, making for a tough comparison to year-ago figures.
Former Australian PM Rudd sues broadcaster
The filing cabinets in question were sold off especially cheaply, because they were clearly full, and no-one could find the keys. The government has ordered a review into how the cabinets were disposed with the files in them.
Russian Federation to US Navy: Get new maps
The five clips , lasting 6-11 seconds each, apparently show the US Navy aircraft and the Russian warplane shadowing it. The U.S. aircraft was flying over the Black Sea in global airspace when the interception happened.
Stocks fall sharply as sell-off continues
The index closed down 362.59 points at 26,076.89 in NY , with the broader S&P 500 index falling 31.10 points to 2,822.43. They had risen about 2 percent premarket, aiming for their 2002 highs, after the company's strong results and forecast.
Breast cancer treatment increase heart disease risks
Although breast cancer death rates have declined since 1989, over 40,000 American women die from the disease every year. The report said some heart damage , including the kind caused by drug Herceptin sometimes can be reversed.
PS4 boosted in Japan after strong Monster Hunter debut
The buzz leading up to the release of Monster Hunter World was considerable, and it seems like Capcom is now reaping the rewards. You might be used to chasing after your prey in Monster Hunter World by now, but all you have to do to get this pack is log in.