As the bears roam the Arctic sea ice hunting seals, they use more energy than expected. High-tech collars on the bears recorded video, locations, and activity levels over a period of eight to 11 days, while metabolic tracers enabled the team to determine how much energy the bears expended.
"Unfortunately, with the rapid environmental changes occurring in Arctic sea ice, the specialisation that once allowed polar bears to live in this challenging habitat has painted the animals into a physiological corner and led to devastating consequences".
"Nobody can conclude from the study that polar bears will get extinct", he tells DW. The bears were fitted with Global Positioning System collars that had cameras to record point-of-view videos of each.
"Arctic communities are not prepared to deal with such a spill, and when it happens the contaminants will have long-term impacts on important habitat for wildlife, including polar bears, whales and fish", said Paul Crowley, vice president of Arctic conservation for WWF-Canada, in a scorecard that included nation-by-nation evaluations in areas such as management of human and polar bear conflict.
In December past year, a video of a dying polar bear rummaging in trash and eating styrofoam, assumed to be starving, went viral on social media.
"They found that high energy demands required consumption of high-fat prey, such as seals, which are easy to come by on sea ice but almost unavailable in ice-free conditions", the abstract to their paper says. Or they stay on land longer, spending the summer and, increasingly, the fall fasting, living off their fat from the seals they caught in the spring. Over the course of the study, five of the nine bears lost body mass, meaning they weren't taking in enough food to meet those energy demands.
"Spring is the pupping season for the seals", said Dr. Bechshoft.
Anthony Pagano, a research wildlife biologist with the U.S. Geological Survey and the lead author of the study, says this is the first time a group of polar bears has been studied this intensely.
Climate change is having dramatic effects on the Arctic sea ice, forcing polar bears to move greater distances and making it harder for them to catch prey.
"The bears are moving with the ice and moving into these deeper water areas where it's thought they are having much less opportunity to catch seals".
But scientists worry that ongoing climate-driven declines in Arctic sea ice, particularly during the warm months of the year, may be affecting the bears' hunting success.
Until then experts had assumed that polar bears required less energy because they have no natural predators and their hunting method does not involve a lot of physical exertion: They sit on ice floes and wait for seals to emerge.
The huge glacial ice sheets in Greenland and Antarctica are reacting more slowly to the warming atmosphere and oceans but scientists are watching them closely as they will heavily influence sea level rise if there's significant melting.
"Every piece of evidence shows that polar bears are dependent on sea ice and if we don't change the trajectory of sea ice decline, polar bears will ultimately disappear". A study published this week in Science found the endangered species may need much more energy to survive than previously believed.
The data collected showed that numerous polar bears ran on an energy deficit, and the metabolic rates, which is the amount of energy their bodies need to function, averaged more than 50 percent higher than previous studies predicted. Our measures of metabolism were considerably higher than previous estimates of polar bear metabolic rates.
Gounder, who had led the Nabha jailbreak with five other prisoners in November 2016, continued to elude police. Prema Lahoria is a Jalandhar-based gangster who assisted Gounder in many killings, according the police.
Pederson has gotten great credit for his almost flawless play calling against the Minnesota Vikings in the NFC Championship game. He's incredibly passionate about his players and putting them in great positions. "He kind of had that stature of a head coach".
Soon after, Ramadan was accused of making sexual advances on four women who studied under him as teenagers in Geneva. She described the alleged assault in her autobiography but at the time, did not name Ramadan to avoid legal issues.
During an eclipse , the moon will pass to the Earth's shadow which will give it a reddish tint, known as a " blood moon ". The skies over Taiwan tonight (Jan. 31) will be illuminated by the extremely rare trifecta of a super, blue and red moon.
For his part, chairman of supervisory Board of Volkswagen , Hans Dieter Pötsch, has distanced himself from experiments. The German government said on Monday that any auto emissions testing on monkeys or people was unjustifiable.
Although there is no legal backing for Odinga's "inauguration", many supporters like Peter Musyoka are optimistic. The security apparatus of Kalonzo Musyoka the vice president of NASA leader Raila Odinga has been withdrawn.
Amazon is offering several interesting features in the United States with Alexa, but in India, the features are pretty limited. Amazon is likely hoping the exposure will help it maintain strong Echo sales and fend off competition from Google and Apple.
I want to share with you a new initiative we're undertaking in partnership with Berkshire Hathaway and JPMorgan Chase. We are going to start to see more and more cutting out the insurers and doing self-insured health plans.
The device features a 1200mAH battery , which the company claims will give a standby time of 12days on 4G. The pricing of the device will also be unveiled during the mega event, going to be held in Spain.
The Eagles quarterback said Friday he tore the LCL as well as the ACL in his left knee late in a Week 14 win over the Rams. He threw for 352 yards and three touchdowns in a 38-7 win over the Minnesota Vikings in the NFC Championship Game.
It is a situation we need to manage, but all the details will stay inside the club. "We need to stay united after all this". All I can say about the situation is that this is the best decision for Leicester, in the best interests of Leicester.
French meteorologists say the months of December and January were the third wettest ever since records began in 1900. It's enough to worry Joao de Macedo, janitor at a residential building in Paris's upscale 16th Arrondissement.
The girl was booked into Juvenile Hall on Thursday night on suspicion of negligently discharging a firearm on school grounds. It happened at 08:55 local time (16:55 GMT) on Thursday at Salvador Castro Middle School in the Westlake district.
Amazon noted that the fourth quarter earnings includes a tax benefit of roughly $ 789 million due to the change in US tax code. The three companies unveiled a yet-to-be-named company to give their US workers and families a better health insurance option.
The flood of low-skilled immigrants into the USA has suppressed wages, harmed American workers and strained federal resources. President Donald Trump is calling on Senate Republicans to bring his immigration framework to a vote.
Preference for boys leads to skewed gender ratio in India due to foeticide, disease, neglect, or inadequate nutrition . Sending a young woman to her new husband with a dowry has been but many families still practice this custom.
A number of teams, including the Jets , Broncos , Browns, Dolphins, Cardinals, Bills etc. are all potential landing spots. The transaction itself, however, can not be completed until March 14 at 3 p.m., the first day of the new league year.
If soap and water are not available, use an alcohol-based hand rub. "Adenovirus is a very common virus", said Dr. DHEC does not release county-by-county figures, so it's unclear if Chesterfield has had any flu deaths.
Tesla CEO Elon Musk has now confirmed the official date for the inaugural launch of SpaceX's Falcon Heavy . The first Falcon Heavy mission will even use two refurbished boosters from previous Falcon 9 missions.
Citi card members will have access to purchase pre-sale tickets through Citi's Private Pass Program beginning at 10 a.m. The Colonial Life Arena announced Monday that Stapleton's "All-American Road Show" will stop in Columbia on October 25.
Sun Life Financial INC boosted its holdings in shares of Freeport-McMoRan by 96,340.0% in the 2nd quarter. (NYSE: FCX ). Its up 0.19, from 0.95 in 2017Q2. 55 funds opened positions while 102 raised stakes. (NASDAQ:NEWS) for 197,669 shares.