Feb 04 2018
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.
The findings have scientists anxious about whether polar bears will be able to catch enough prey to meet their unexpectedly high energy needs and sustain their population. At the same time, a number of polar bear populations have been on the decline - for example, dropping by about 40 percent in the Beaufort Sea in the course of a decade.
But as the global temperature is rising, polar bears can face more trouble in future. They fitted the bears with collars carrying Global Positioning System trackers, accelerometers and video cameras.
As an apex predator in the Arctic (at the top of a food chain) the polar bear is a key component of the region's ecosystem but this new study confirms other studies showing climate could have a serious adverse effect on their survival. But he added, "I think it confirms all the reasons to be concerned about polar bears from a conservation perspective are intact". There, Arctic warming means the sea ice is breaking up earlier in the summer and returning later in the fall, forcing bears to spend more time on land.
Four other bears lost up to 10 percent of their body mass over the same period, the result of not catching seals.
"We've been documenting declines in polar bear survival rates, body condition, and population numbers over the past decade", says lead author Anthony Pagano, a Ph.D. candidate at the University of California Santa Cruz, quoted in a press release.
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 next step is to use this information to really start to quantify how changes in movement patterns might be affecting the energy demands of these bears".
Canada, home to two-thirds of the world's population of roughly 30,000 polar bears, has done a good job surveying subpopulations, making sure the polar bear trade is legally regulated, and incorporating traditional knowledge into polar bear management, the WWF said.
Seine still rising in Paris; Louvre partially closed
The capital's bateaux mouches rivercraft was out of service, and only emergency services were authorised to navigate the Seine. Authorities say some parts and suburbs of Paris are under water, and expect flood levels to remain high throughout the week.
Carrie Fisher wins Grammy Award for 'The Princess Diarist'
The Princess Diarist captured both those sides of Fisher, and so I'm really glad she took home the Grammy . We can only dream about what her acceptance speech would've been like.
Putin opposition leader Alexei Navalny arrested after organizing fair election protests
Navalny, a lawyer and anti-corruption activist, is gaining name recognition, if not widespread support from Russia's public. After authorities refused to register his candidacy in the election, Navalny has called on supporters to boycott the vote.
Satellite telemetry shows several tagged polar bears moving long distances to remain on receding sea ice in July 2016.
The animals need to eat on average one adult (up to 70kg) or three subadult ring seals every 10 days to maintain their condition, and this hunting requires sea ice.
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.
Mr Pagano and his collaborators monitored the behaviour, hunting success and metabolic rates of bears as they hunted on the sea ice in the spring. The remote location has made it hard for scientists to study the bears' movement and activities until now.
So don't give up yet on the powerful polar bear.
Photos of skinny and emaciated polar bears are more common as their food disappears
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.
Previous studies estimate the mortality of male polar bears would increase from 6 per cent to 48 per cent if fasting periods increased from 120 days to 180 days.
Feb 04 2018
Uma Thurman Shares Intimate Details About Harvey Weinstein Assault
Quentin ( Tarantino ) used Harvey as the executive producer of Kill Bill , a movie that symbolizes female empowerment", she said. Harvey Weinstein's team is considering possible legal action against Uma Thurman , according to a new statement obtained by EW.
Feb 03 2018
Leicester City boss Claude Puel: 'Tough to manage Riyad Mahrez situation'
All I can say about the situation is that this is the best decision for Leicester, in the best interests of Leicester. Mahrez's continued absence means Puel will have an unchanged squad against Swansea.
Feb 02 2018
Pelicans, Bulls Reach Agreement On Nikola Mirotic Trade
That's not a bad haul for a Bulls team that has had Mirotic on the block for the vast majority of the season. Coincidentally, the Bulls waived Pondexter to make room for the incoming players.
Feb 01 2018
Nokia 3310 4G casually goes official in China, commercially launching next month
Above all, it also supports VoLTE as well as WiFi hotspot which is not present in the Jio Phone by Reliance Jio . It will be available in China and supports TD-LTE, the possibility of an global version is up in the air.
Feb 01 2018
Amazon, Berkshire Hathaway and JP Morgan to set up healthcare firm
But we also do not accept it as inevitable. "The solution will reportedly be 'free from profit-making incentives and constraints". Amazon's entry into the health market has been perceived as imminent, even though the company had announced nothing publicly.
Feb 01 2018
Alex Smith traded by Chiefs to Redskins, sources say
Cousins played under the franchise tag the last two seasons in D.C. and was set to become a free agent this off-season. In Kansas City's 27-20 win over the Eagles in Week 2, Smith was 21 of 28 for 251 yards and a touchdown.
Jan 31 2018
Russian team banned from Winter Paralympics, athletes to compete as neutrals
Beucher claimed the IPC had been influenced by external pressure to create a way in which Russian athletes can compete. The IPC said in a statement that "it is maintaining the suspension of the Russian Paralympic Committee (RPC)".
Jan 31 2018
Prince William, Kate Middleton take a shot at bandy in Sweden
The source explained: "She mentioned it to Joey who thought it was a brilliant idea". She has donated her hair to help make wigs for young patients.
Jan 29 2018
Macron's "France is Back" Speech Makes Plea for European Unity
On Wednesday, Macron took his pledge of a French renaissance to the world's business elite gathered in the Swiss resort of Davos . We have to design a 10-year strategy to make Europe an actual economic, social, green, scientific, and political power".
Jan 28 2018
Most wanted gangster Vicky Gounder, aide killed in encounter
Replying to questions, DGP Arora justified the need for a stringent law like PCOCA to effectively deal with criminals. The daredevil murder of Sukha took place when the criminal was being taken to Nabha Jail after a court hearing.
Feb 03 2018Los Angeles faculty capturing by woman, 12, 'was unintentional'
Feb 03 2018Trump says Democrats are 'AWOL' on immigration
Feb 02 2018Computer chips reason for Samsung's record profit
Feb 01 2018Besser Museum to Hold Lunar Eclipse Party Wednesday
Feb 01 2018Muslim scholar questioned by French police over rape claims
Feb 01 2018Amazon's Alexa can now send SMS messages to any phone
Jan 31 2018Iranian women protest obligatory headscarf; Twitterati praise the bravery
Jan 30 2018Nokia 2 to receive Android 8.1 Oreo update soon
Jan 29 2018Carson Wentz ditches cane, showing progress in ACL rehab
Jan 28 2018Floodwaters continue to rise in Paris
Feb 03 2018Man given life for Finsbury Park terror attack
Feb 02 2018Boeing Gets $6.6 Billion From Pentagon To Expand Missile Defense
Feb 01 2018Shopian army firing: Third civilian dies of bullet injury
Feb 01 2018India's preference for boys has produced 21 million "unwanted girls"
Feb 01 2018German carmakers funded studies that made young people huff emissions
Jan 31 2018Will Ronda Rousey Elevate or Overshadow Women's Wrestling in WWE?
Jan 30 2018Chris Stapleton to perform 2 Upstate NY shows
Jan 29 2018Recommendation Hold on Basic materials stock: Freeport-McMoRan Inc. (FCX)
Jan 29 2018Pochettino questions Tottenham motivation after FA Cup escape
Jan 28 2018Li Haotong on unfamiliar ground as he leads Omega Dubai Desert Classic
Jan 28 2018Pelicans C reportedly out for season with torn Achilles tendon
Jan 28 2018On last day in Israel, Pence visits Western Wall, Yad Vashem