Navigation Links
For polar bears, it's survival of the fattest
Date:3/19/2013

One of the most southerly populations of polar bears in the world and the best studied is struggling to cope with climate-induced changes to sea ice, new research reveals. Based on over 10 years' data the study, published in the British Ecological Society's Journal of Animal Ecology, sheds new light on how sea ice conditions drive polar bears' annual migration on and off the ice.

Lead by Dr Seth Cherry of the University of Alberta, the team studied polar bears in western Hudson Bay, where sea ice melts completely each summer and typically re-freezes from late November to early December. "This poses an interesting challenge for a species that has evolved as a highly efficient predator of ice-associated seals," he explains. "Because although polar bears are excellent swimmers compared with other bear species, they use the sea ice to travel, hunt, mate and rest."

Polar bears have adapted to the annual loss of sea ice by migrating onto land each summer. While there, they cannot hunt seals and must rely on fat reserves to see them through until the ice returns.

Dr Cherry and colleagues wanted to discover how earlier thawing and later freezing of sea ice affects the bears' migration. "At first glance, sea ice may look like a barren, uniform environment, but in reality, it's remarkably complex and polar bears manage to cope, and even thrive, in a habitat that moves beneath their feet and even disappears for part of the year. This is an extraordinary biological feat and biologist still don't fully understand it," he says.

From 1991-97 and 2004-09, they monitored movements of 109 female polar bears fitted with satellite tracking collars. They tagged only females because males' necks are wider than their heads, so they cannot wear a collar. During the same period, the team also monitored the position and concentration of sea ice using satellite images.

"Defining precisely what aspects of sea ice break-up and freeze-u
'/>"/>

Contact: Becky Allen
44-012-235-70016
Wiley
Source:Eurekalert  

Page: 1 2

Related biology news :

1. New gene variant may explain psychotic features in bipolar disorder
2. Polar bear researchers urge governments to act now and save the species
3. Dartmouth research offers new control strategies for bipolar bark beetles
4. MBL scientists find bipolar marine bacteria, refuting everything is everywhere idea
5. Missing polar weather systems could impact climate predictions
6. Finding life in the volcanic systems of the Antarctic Polar Front
7. Making sense out of the biological matrix of bipolar disorder
8. University of Texas Medical Branch selected to manage Center for Polar Medical Operations
9. Polar And LOOK Launch The Worlds First Pedal-Based Power Cycling System
10. Duck-billed dinosaurs endured long, dark polar winters
11. NRC authors brief federal agencies on the state of polar regions
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
For polar bears, it's survival of the fattest
(Date:4/22/2014)... positive effects not only on weight loss but also ... Academy and University of Cincinnati have shown that the ... the stomach size but by increased levels of bile ... Nature , indicate that bile acids could be a ... research from the Sahlgrenska Academy has demonstrated that obesity ...
(Date:4/22/2014)... Most people think the development of the heart only ... birth are full of cellular changes that play a role ... models, researchers at Baylor College of Medicine have now been ... genes code proteins, determining their role) that takes place during ... The findings, which appear in Nature Communications , also ...
(Date:4/21/2014)... cows, which is commonly used as a farm soil ... resistance genes from the cows, gut bacteria. The findings, ... of the American Society for Microbiology, hints that cow ... antibiotic resistance genes that transfer to bacteria in the ... antibiotic resistance (AR) genes have already been identified, but ...
Breaking Biology News(10 mins):Researchers identify a mechanism linking bariatric surgery to health benefits 2Protein expression gets the heart pumping 2Cow manure harbors diverse new antibiotic resistance genes 2Cow manure harbors diverse new antibiotic resistance genes 3
... supplies are scarce in many areas of the United States, ... often regarded as the clean-burning energy source of the future ... previously thought. Their study appeared in ACS, journal Environmental ... out in the study that annual bioethanol production in the ...
... challenges the increasingly popular belief that smoking marijuana is ... Canada are reporting that smoking marijuana, like smoking tobacco, ... for the Aug. 17 issue of ACS, Chemical ... Maertens and colleagues note that people often view marijuana ...
... As the world,s environment ministers, government officials, diplomats ... Copenhagen in December 2009 to unite in the battle ... political deals the world has ever seen, the increasingly ... an article published today, 5 August, 2009, in IOP ...
Cached Biology News:Climate change poker: The barriers which are preventing a global agreement 2
(Date:1/15/2014)... (PRWEB) January 15, 2014 Cynvenio, a ... management through the genomic analysis of tumor cells in ... Finder™, a web-based cancer decision support application powered by ... with Cynvenio’s ClearID™ genomic test, Therapy Finder will provide ...
(Date:1/15/2014)... (PRWEB) January 15, 2014 More than ... and about 1 in 3 seniors will die with ... ). These jaw-dropping figures have shocked many Americans into ... hopefully, help prevent these tragic age-related cognitive disorders. Jonathan ...
(Date:1/15/2014)... Freeslate, Inc ., the leading provider ... Limited, one of India’s top five pharmaceutical companies, has ... for high throughput solid form screening. , ... wide range of quality, affordable generic and branded formulations ...
(Date:1/14/2014)... San Diego, CA (PRWEB) January 14, 2014 ... based on the products of cells grown under simulated ... an international license agreement with Suneva Medical, Inc. for ... media (CCM). , This agreement is an ...
Breaking Biology Technology:Cynvenio Offers New Breast Cancer Therapy Finder Application for its ClearID Breast Cancer Genomic Test 2Cynvenio Offers New Breast Cancer Therapy Finder Application for its ClearID Breast Cancer Genomic Test 3Biohack Pure Offers 5 Tips for Increasing Memory in 2014 2Lupin Selects Freeslate’s CM Protégé PharmD System to Accelerate Polymorph Screening for Drug Development 2Lupin Selects Freeslate’s CM Protégé PharmD System to Accelerate Polymorph Screening for Drug Development 3Histogen and Suneva Medical Expand License for Cell Conditioned Media-based Aesthetic Products Internationally 2Histogen and Suneva Medical Expand License for Cell Conditioned Media-based Aesthetic Products Internationally 3
... , , ST. JOSEPH, Mich., ... company, announced today that it launched a collaborative development project ... and leading academic centers as members. The 24-month project aims ... of different types of stem cells. The knowledge base will ...
... 1 According to a new,market research report, ,Global ... ), the,global autoimmune treatment market is expected to be ... 12.7% from 2009 to 2014. The North,American market is ... revenues. , Browse 100+ market ...
... ... the Center for Orthopedics in Sheffield Village, Ohio, just west of Cleveland, now offers ... for patients without an intact rotator cuff. Until now, these individuals -- who are ... live with the pain." , ...
Cached Biology Technology:GeneGo Kicks Off The MetaMiner Stem Cell Project With Industry and Academics 2MarketsandMarkets: Global Autoimmune Treatment Market Worth US$68.81 Billion by 2014 2MarketsandMarkets: Global Autoimmune Treatment Market Worth US$68.81 Billion by 2014 3MarketsandMarkets: Global Autoimmune Treatment Market Worth US$68.81 Billion by 2014 4Robert Zanotti, MD, Is First Lorain County, Ohio Orthopedic Surgeon to Perform Reverse Total Shoulder Replacement 2Robert Zanotti, MD, Is First Lorain County, Ohio Orthopedic Surgeon to Perform Reverse Total Shoulder Replacement 3Robert Zanotti, MD, Is First Lorain County, Ohio Orthopedic Surgeon to Perform Reverse Total Shoulder Replacement 4
... UNIchip AV-400 contains 400 unique ... nitrocellulose-coated glass slide. The proteins, all ... Ontology classification, are arrayed in quadruplicate ... and a specific chip layout guarantee ...
...
... stocks contained in standard 96-well microtiter plates. ... approximately 5,000 clones per plate. After positive ... the corresponding subplate is screened with a ... well(s). Cells from a positive well are ...
... The benchmark for analytical performance ... ease-of-use and the ultimate in ... Varian 810-MS features include: ... optics minimize,interferences, providing reliable, routine, ...
Biology Products: