Navigation Links
Biologists report more bad news for polar bears
Date:11/24/2010

nt skull for eating these kinds of foods."

In Canada, grizzly bears are moving north and are already in polar bear territory, Van Valkenburgh and Slater said.

The life scientists whose co-authors include UCLA undergraduates Leeann Louis and Paul Yang and graduate student Borja Figueirido from Spain's Universidad de Malaga, Campus Universitario de Teatinos studied two adult male skulls from museums, one of a polar bear from Canada, the other of a grizzly from Alaska. They built 3-D computer models of the skulls and then analyzed their biomechanics.

"We can apply muscle forces to the skull to simulate biting, and we can measure how hard the animal could bite. We can measure stress and strain in the skull as well," Slater said. "We found that while the stresses in the grizzly bear skull are relatively low, the same bites in the polar bear produce much more stress. Combined with other evidence from Blaire's laboratory, this tells us that the smaller teeth of polar bears are less suited to diets that consist of plants, grass, vegetation and berries."

"Polar bears would not be able to break up the food as well in their mouths and would not digest it as well," Van Valkenburgh said.

In the timeline of evolution, polar bears evolved from the brown bear very recently, and the two are very closely related, Van Valkenburgh and Slater said. Genetic studies indicate that the split between polar bears and brown bears occurred only 500,000 to 800,000 years ago the most recent split between any of the eight bear species.

Despite the recentness of the split between these two species, their skulls and teeth are extremely different, probably as a result of where they live (arctic versus temperate regions) and the differences in their diets. Grizzly bears have very large molar teeth, while polar bears have teeth that are much smaller. Polar bears eat seal blubber, which is soft and does not require much chewing, while
'/>"/>

Contact: Stuart Wolpert
swolpert@support.ucla.edu
310-206-0511
University of California - Los Angeles
Source:Eurekalert

Page: 1 2 3 4

Related biology news :

1. Biologists identify influence of environment on sexual vs. asexual reproduction
2. Penn biologists say species accumulate on Earth at slower rates than in the past
3. Microbiologists find source of fungus’s damaging growth
4. Biologists discover biochemical link between biological clock and diabetes
5. Plant biologists lead biobased-fuel research projects
6. Biologists find way to reduce stem cell loss during cancer treatment
7. Capacity for exercise can be inherited, UC Riverside biologists find
8. CCNY biologists study rainforest host-plant associations
9. Scripps Oceanography biologists awarded prestigious honors
10. Biologists meet with members of Congress
11. Rapid growth in adolescence leads to fewer offspring, UC Riverside biologists find
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/12/2015)... VIEW, Calif. , March 12, 2015 /PRNewswire/ ... with Complimentary Registration here: http://bit.ly/1G7Os0L . SPEAKERS: ... Manager Aravind SeshagiriPhoto - http://photos.prnewswire.com/prnh/20150311/181111 ... in order to compete in several different markets ... market is currently witnessing an uptrend. ...
(Date:3/10/2015)... , March 10, 2015   Tute Genomics ... has been selected by next-generation sequencing company PrimBio ... whole exome and targeted gene panel interpretation. ... has adopted the most current technologies to support the ... research. The company offers two types of exome sequencing ...
(Date:3/2/2015)... JOSE, Calif. , March 2, 2015 /PRNewswire/ ... the leading developer of human interface solutions, today ... technology that is designed to enable rapid and ... Natural ID™ module for gaming is a turnkey ... ODMs the ability to quickly integrate fingerprint ID ...
Breaking Biology News(10 mins):Biometrics Key to Future Growth in Healthcare, Retail and Financial Markets 2Biometrics Key to Future Growth in Healthcare, Retail and Financial Markets 3PrimBio Research Selects Tute as Whole Exome Analysis Provider, Creating Integrated, End-to-End Solution for Next-Generation Sequencing & Data Analysis 2PrimBio Research Selects Tute as Whole Exome Analysis Provider, Creating Integrated, End-to-End Solution for Next-Generation Sequencing & Data Analysis 3Synaptics Unveils New Fingerprint ID Solution for Gamers 2Synaptics Unveils New Fingerprint ID Solution for Gamers 3
... FirstMark, the diagnostic division of GenWay Biotech, Inc., is ... and presenting at the San Diego Academy of Family ... 22-24. FirstMark will showcase the groundbreaking research and data ... first and only multiple biomarker blood test on the ...
... life, but for those species that do, wildlife biologists have ... relationships: greater longevity and breeding success, according to a study ... published in Behavioral Ecology . The study,s authors ... lose their mate, their chances for survival are greatly diminished. ...
... ointment, light on, light off that,s how easy it ... the majority of patients suffer severe pain during the so-termed ... can be so painful has now been uncovered by researchers ... signalling molecules secreted by the cancer cells. "The results may ...
Cached Biology News:FirstMark Exhibiting and Presenting at the San Diego Academy of Family Physicians 55th Annual Postgraduate Symposium 2Black brant geese show lifetime relationship good for goose and gander 2Double the pain: RUB biologists find the cause of pain in the treatment of fair skin cancer 2
(Date:3/31/2015)... 31, 2015 Materials in Society ...   June 30 2015   Elsevier , ... and services and publishing home of Materials Today , ... the Materials in Society  Lecture Series . ... 8 th International Conference on Materials for Advanced Technologies ...
(Date:3/31/2015)... 2015  Bayer HealthCare (Bayer) has expanded its ... of Technology (MIT) and Harvard University to include ... this new part of the alliance is to ... new cardiovascular therapies. "We are excited ... to the area of cardiovascular genomics to discover ...
(Date:3/31/2015)... NEW YORK , March 31, 2015 ... a biopharmaceutical company advancing protein biologic therapies and ... Korean marketing partner, Hanmi Pharmaceutical Co., Ltd ("Hanmi") ... from the country,s Ministry of Food and Drug ... Institute (KTR) for MuGard, its oncology supportive-care treatment ...
(Date:3/31/2015)... 2015 Today, Cryos International, the world’s ... their U.S. facilities and inventory from New York City ... experience, Cryos’ relocation is a reflection of their increasing ... Orlando was completed during the first weekend of spring, ... place on April 6. The new facility in the ...
Breaking Biology Technology:Elsevier Materials Science Council Introduces the Materials in Society Lecture Series at the International Conference on Materials for Advanced Technologies (ICMAT) 2Elsevier Materials Science Council Introduces the Materials in Society Lecture Series at the International Conference on Materials for Advanced Technologies (ICMAT) 3Bayer HealthCare Expands Collaboration with Broad Institute of MIT and Harvard to Develop Therapies for Cardiovascular Disease 2Bayer HealthCare Expands Collaboration with Broad Institute of MIT and Harvard to Develop Therapies for Cardiovascular Disease 3PlasmaTech Biopharmaceuticals' Partner Hanmi Pharmaceuticals Receives Marketing Approval For MuGard In Korea 2PlasmaTech Biopharmaceuticals' Partner Hanmi Pharmaceuticals Receives Marketing Approval For MuGard In Korea 3Cryos International Completes Groundbreaking Sperm Migration to Orlando, Florida 2
... EXTON, Pa., Oct. 2 Othera Pharmaceuticals, ... patient-administered,products for ophthalmology, oncology, and inflammatory disease, ... MD, FACP, as Chief,Scientific Officer effective immediately. ... development, integration and execution of Othera,s research,and ...
... BEIJING and CLAREMONT, Calif., Oct. 2 Kiwa,Bio-Tech Products ... Tianjin Kiwa Feed Limited Liability Company, located in,Wuqing District ... the,month of September. Mr. Wei Li, Chairman and ... in volume of Kiwa,s bio-feed products to approximately 7,550 ...
... Posters at Medical Conference in San Diego, ... October 4 ... - 7, 2007 -, CHICAGO, Oct. ... the,discovery, development and commercialization of novel drugs in the,therapeutic areas of infection, cancer and inflammation, ...
Cached Biology Technology:Revised: Othera Pharmaceuticals Appoints Dr. Frederick R. Rickles Chief Scientific Officer 2Revised: Othera Pharmaceuticals Appoints Dr. Frederick R. Rickles Chief Scientific Officer 3Kiwa Bio-Tech Ships 2,700 Tons of Bio-feed in One Month 2Advanced Life Sciences to Present Data from Selected Cethromycin Clinical Trials at the 45th Annual Meeting of the Infectious Diseases Society of America 2Advanced Life Sciences to Present Data from Selected Cethromycin Clinical Trials at the 45th Annual Meeting of the Infectious Diseases Society of America 3
Request Info...
... Monoclonal Mouse Antibody to Cytokeratin 5 / ... a high molecular weight, basic type of ... the superficial cell layers of stratified epithelia ... and in mesothelial cells and mesothelioma. Cytokeratin ...
Bovine Coronary Artery Endothelial Cells (BCAEC) (>500,000 cells)...
Bovine Renal Artery Endothelial Cells (BRAEC) (>500,000 cells)...
Biology Products: