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.
Boeing Gets $6.6 Billion From Pentagon To Expand Missile Defense
It was launched from the shore rather than Navy Aegis warships that carried earlier versions of the missile. The official said those involved in the launch, including developer Raytheon , were analysing why it failed.
Chris Stapleton to perform 2 Upstate NY shows
The Missoula show is scheduled for August 3 in the Adams Center and public tickets go on sale February 9 at 10 a.m. Stapleton is also getting acclaim after being featured on Justin Timberlake's new song, " Say Something ".
Carson Wentz ditches cane, showing progress in ACL rehab
Wentz, 25, said Friday that when he returns to the field in several months, he won't alter his playing style. He still expects to be ready for the 2018 regular-season opener in September.
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 03 2018
Man given life for Finsbury Park terror attack
Sue Hemming from the CPS said: " Darren Osborne planned and carried out this attack because of his hatred of Muslims". Ruzina Akhtar, daughter of Ali, told reporters that the family was "very pleased with the guilty verdict".
Feb 01 2018
India's preference for boys has produced 21 million "unwanted girls"
For all the social campaigns and awareness drives to end sex selection in India , the preference for sons is still going strong. The wealthy Punjab and Haryana states were most affected with a ratio of 1,200 boys per 1,000 girls in children younger than 7.
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.
Feb 01 2018
Amazon's Alexa can now send SMS messages to any phone
Another user asked Alexa to play country music as he sat in his living room, reading a newspaper. Releasing the teaser about the new product or feature is a common practice among the companies.
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
Floodwaters continue to rise in Paris
Paris authorities have closed several tunnels, parks, and the bottom floor of the Louvre Museum as precautionary measures. However, authorities said on Saturday that the flooding won't be as bad as forecast earlier this week.
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.
Jan 28 2018
On last day in Israel, Pence visits Western Wall, Yad Vashem
But as I said, it is controversial because Palestinians also have a claim on the city. He described Trump as "a political pyromaniac, a racist misogynist".
Feb 04 2018Uma Thurman Shares Intimate Details About Harvey Weinstein Assault
Feb 03 2018Leicester City boss Claude Puel: 'Tough to manage Riyad Mahrez situation'
Feb 01 2018Besser Museum to Hold Lunar Eclipse Party Wednesday
Feb 01 2018Shopian army firing: Third civilian dies of bullet injury
Feb 01 2018German carmakers funded studies that made young people huff emissions
Feb 01 2018United States names Hamas leader as terrorist
Jan 31 2018Will Ronda Rousey Elevate or Overshadow Women's Wrestling in WWE?
Jan 30 2018Nokia 2 to receive Android 8.1 Oreo update soon
Jan 29 2018Putin opposition leader Alexei Navalny arrested after organizing fair election protests
Jan 29 2018Pochettino questions Tottenham motivation after FA Cup escape
Feb 03 2018Los Angeles faculty capturing by woman, 12, 'was unintentional'
Feb 03 2018Trump says Democrats are 'AWOL' on immigration
Feb 02 2018Pelicans, Bulls Reach Agreement On Nikola Mirotic Trade
Feb 01 2018Nokia 3310 4G casually goes official in China, commercially launching next month
Feb 01 2018Muslim scholar questioned by French police over rape claims
Feb 01 2018Amazon, Berkshire Hathaway and JP Morgan to set up healthcare firm
Jan 31 2018Iranian women protest obligatory headscarf; Twitterati praise the bravery
Jan 30 2018Cardi B Freaking Out Over A Note From U2's Bono Is Priceless
Jan 30 2018Seine still rising in Paris; Louvre partially closed
Jan 29 2018Carrie Fisher wins Grammy Award for 'The Princess Diarist'
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