Polar bears struggling to find food in Arctic hunting grounds

02 February, 2018, 21:49 | Author: Carmen Reese
  • Christopher Polk via Getty Images
Ellen De Generes and and wife Portia de Rossi celebrate birthdays just days apart

"We found that they were really dependent on their ability to catch seals", Mr. Pagano said.

For now, the study demonstrates that bears' energy demands are likely higher than expected-meaning they require more food to survive than previously thought-and that failure to catch seals can result in rapid, significant weight loss.

The study shows that global warming is the reason which has treaten their existence and stopping them from hunting seals during spring. "As a result, bears showed remarkable fluctuations in body mass based on their foraging success, emphasizing the feast or starvation lifestyle of these animals".

"We've been documenting declines in polar bear survival rates, body condition, and population numbers over the past decade".

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. He plans to track the polar bears' activities over the entire year to work out whether and how their energy needs change. The study suggests that as Arctic sea ice diminishes and becomes more fragmented, it will further impact the energetic balance of polar bears by reducing their access to seal prey and by increasing their cost of travel. As sea ice continues to decline, frequent and timely monitoring of polar-bear subpopulations across Canada will be necessary to ensure co-management boards can make informed decisions. The team was marked them with Global Positioning System collar to record videos of their movements and hunting style. Spring, just before the sea ice begins its seasonal breakup, is a critical time for polar bears to gain the weight they need to carry them through until the sea ice re-forms, so the researchers tracked the bears in April of 2014, 2015 and 2016. And yet they are uniquely vulnerable in their nearly total reliance on one prey species.

Biologists at the University of California, Santa Cruz, monitored the behaviour, hunting success and metabolic rates of adult female polar bears without cubs as they hunted for prey on the sea ice of the Beaufort Sea, in the Arctic Ocean, in the spring. The study shows If the bears don't eat that amount of food, they will lose weight quickly. As a leader in conservation, the work of San Diego Zoo Global includes on-site wildlife conservation efforts (representing both plants and animals) at the San Diego Zoo, San Diego Zoo Safari Park, and San Diego Zoo Institute for Conservation Research, as well as worldwide field programs on six continents.

More news: Rob Gronkowski Returns To Practice, Remains In Concussion Protocol

"An increasing proportion of bears are unable to meet their energy demands", the authors concluded.

By catching their favourite prey - ringed seals - every 10 to 12 days, a female polar bear will maintain weight levels of around 450lbs, yet the challenge of fulfilling a consumption rate of 220 Big Macs over this short period is becoming increasingly fraught. "I am still optimistic that the species will make it".

"In a population, there are always individuals who cope better or worse with any changes".

Data collected from the activity trackers confirmed that polar bears needed more calories the further they walked.

Fickel points out that the species has seen many warmer periods during their existence, and that they might be able to adjust to a warmer world - as long as there is a healthy seal population, that is. Bears are also doing a lot more swimming as the sea ice declines, said Derocher. In 2007, the scientists had predicted that if humans will keep pumping heat into the atmosphere, by 2050 around two-third polar bears will go extinct. Its content is created separately from USA TODAY.

Recommended:

  • Another anchor store closes at Nittany Mall

    Another anchor store closes at Nittany Mall

    Younkers will close sometime this spring, according to an announcement by the store's parent company, Bon-Ton Stores Inc. In total, five Carson's in IN are closing including stores in Anderson, Columbus, Elkhart and Marion.
    Toronto police searching properties linked to man charged with 5 murders

    Toronto police searching properties linked to man charged with 5 murders

    The woman, who asked not to be named, said she would often see McCarthur gardening or laying out plants in the driveway. Jeff Rock, MCC Toronto's senior pastor, in the release. "It is unprecedented and draining".
    'Super Blue Blood Moon' to light sky on January 31

    'Super Blue Blood Moon' to light sky on January 31

    If you live in the Central time zone , viewing will be better, since the action begins when the Moon is higher in the western sky. To work out what time that is where you are, just subtract or add your normal timezone from the London time.
  • Paralympics: Russia banned from 2018 Paralympics for doping program

    Paralympics: Russia banned from 2018 Paralympics for doping program

    The neutral Paralympic athletes will be allowed to compete in Alpine skiing, biathlon, cross-country skiing, snowboard and curling.
    Assassin's Creed Origins To Receive New Game+

    Assassin's Creed Origins To Receive New Game+

    But if you've done the same and still want more , you'll probably be happy to hear that a new game plus mode is coming. New Game + mode is indeed the need of the hour for Assassin's Creed Origins .
    Donald Trump signs order to keep Guantanamo Bay prison open

    Donald Trump signs order to keep Guantanamo Bay prison open

    Obama made closing the Guantanamo Bay prison one his first and highest priorities as president, but he was not able to achieve that signature goal.
  • Pulp Fiction: Family Of Five Arrested With 4 Tons Oranges In Vehicle

    Pulp Fiction: Family Of Five Arrested With 4 Tons Oranges In Vehicle

    Five people were arrested in the incident after the suspects couldn't explain to police where the oranges came from. In a freakish incident, police in Seville, Spain, pulled over two cars filled to the brim with stolen oranges .
    California helicopter crash kills 3, others injured, police say

    California helicopter crash kills 3, others injured, police say

    The incident happened just before 2 p.m. local time about a mile away from John Wayne Airport in Orange County. A woman who lives in the neighborhood heard the crash and ran outside to witness the immediate aftermath.
    Joel Embiid stared down Russell Westbrook after a thunderous poster dunk

    Joel Embiid stared down Russell Westbrook after a thunderous poster dunk

    Before Anderson's putback dunk, the game was mired by fouls, replay stoppages, and a combination of exhausted legs and emotions. Carmelo Anthony surpassed 25,000 career points : "It's a special moment", Anthony said. "I'm not about to give him my energy".
  • U.S.  ready to hit Syrian chemical weapons

    U.S. ready to hit Syrian chemical weapons

    Previous attacks on January 22 and January 13 caused symptoms consistent with chemical exposure in more than two dozen civilians. Nearly 400,000 people in Eastern Ghouta have been under siege by the Government and allied militia since 2013.
    Facebook Says It Will Push More Local News Stories

    Facebook Says It Will Push More Local News Stories

    The number of daily users in the United States and Canada actually fell to 184 million from 185 million a quarter earlier. The social network will use the links clicked by readers living in a small geographic area to identify local publishers.
    Vaping Causes DNA Damage in Human Cells and Mice

    Vaping Causes DNA Damage in Human Cells and Mice

    A study previous year looked at the effects of e-cigarettes in what they defined as "long-term users" (around 17 months). The problem comes when trying to gauge how much of an added risk e-cigarettes pose to your health.


Popular

Boeing wins $6.56 billion US defense contract: Pentagon
In the past year, the authoritarian country has increased its missile launch tests, with some missiles flying over the territory of Japan.

Lawmakers Respond To FEMA Puerto Rico Cutoff
Yulin tells reporters in Washington that about 35 percent of residents still don't have power and can't keep food in their homes. Operations began shortly after the hurricane hit the island and plunged it into darkness with no electricity or water supply.

Rep. Trey Gowdy Announces His Retirement
Gowdy became a household name for chairing the House select committee on the 2012 terrorist attack on the U.S. He then took over leading the Oversight and Government Reform Committee past year when then-chairman, Rep.

CDC director resigns after reports of buying tobacco stock
Fitzgerald's resignation was accepted Wednesday morning by current HHS Secretary Alex Azur who assumed that role just last week. Peter Lurie is the former associate commissioner for public health strategy at the Food and Drug Administration.

Orcas are able to imitate human speech. Here's how it sounds like
Killer whales both in the wild and in captivity have also been observed copying dolphin calls and the barks of sea lions. The scientists compared the original sounds with the help of a computer algorithm called dynamic time warping (DTW).

International Olympic Committee mistakenly invited banned Russian to Olympics as coach
Others said the administration had let Russian President Vladimir Putin off the hook. It also has a classified annex with "additional information".

FCC: Officer behind Hawaii false missle alert thought it was real
The missile alert that sent Hawaii residents into a panic earlier this month was triggered intentionally, according to the FCC. And number two , Hawaii's Emergency Management Agency didn't have a plan for what to do if a false alert was transmitted.

Kim Kardashian gets into a cornrow spat with Lindsay Lohan
Their anger was based on the fact that she didn't credit to the right culture. At this point, I think we're all used to the sight of seeing her naked .

Over 700000 rouge apps removed from Google Play Store in 2017
Tens of thousands of apps with inappropriate content were taken down a year ago as a result of such improved detection methods. Out of the 700,000 malicious apps identified by Google , 99 percent were rejected before users could install them.

Is Myanmar 'whitewashing' the Rohingya crisis?
Critics dispute that and say executions are taking place with zero accountability, allegations the police reject. Bangladesh and Myanmar agreed earlier this month to complete the voluntary repatriation of all the refugees.