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:10/16/2014)... researchers have challenged conventional thinking on how the bowel ... mechanism for how bowel cancer starts. , The researchers ... and regenerating the ,crypts, that are a feature of ... involved in bowel cancer development, a controversial finding as ... , Using 3D imaging technologies, Dr Chin Wee Tan ...
(Date:10/16/2014)... infections and worldwide claims the lives of 160,000 ... University have succeeded in developing a promising vaccination ... , Xavier Saelens (VIB/UGent): "We discovered a new ... development of a novel approach to vaccination against ... small children and elderly people." , RSV: ...
(Date:10/16/2014)... 16, 2014 NXT-ID, Inc. (NASDAQ: ... biometric authentication company focused on the growing mobile commerce ... including Wocket™, the Smart Wallet, at the 13 th ... a leading global conference on the intersection of technology ... Mark Anderson , founder and publisher of the Strategic ...
Breaking Biology News(10 mins):Cryptic clues drive new theory of bowel cancer development 2New perspectives for development of an RSV vaccine 2NXT-ID Inc. to Present at 13th Annual FiRe Conference 2NXT-ID Inc. to Present at 13th Annual FiRe Conference 3
... Might those bacteria lead oil companies to change their methods ... same time reducing the carbon dioxide that burning oil and ... be possible. Larter, professor of geoscience and holder ... University of Calgary, was the keynote speaker today for the ...
... a firm link between environmental change and human disease ... a team of scientists from the University of Wisconsin-Madison, ... of the CDC journal Emerging Infectious Diseases, ... incidence of malaria to land-use practices in the Amazon. ...
... bacteria in seven species of sharks and redfish captured ... of these wild, free-swimming fish harbored several drug-resistant bacterial ... Journal of Zoo and Wildlife Medicine , found antibiotic-resistant ... also found multidrug-resistant bacteria in fish at nearly all ...
Cached Biology News:Incidence of malaria jumps when Amazon forests are cut 2Incidence of malaria jumps when Amazon forests are cut 3Wild sharks, redfish harbor antibiotic-resistant bacteria 2
(Date:10/22/2014)... 2014 /PRNewswire/ - iCo Therapeutics ("iCo" or "the Company") ... for its Oral Amphotericin B program.  The company ... vitro work involving samples from HIV/AIDS patients ... complete pre clinical studies and regulatory filings to ... trial, utilizing approximately $700,000 of funding and technological ...
(Date:10/20/2014)... 2014 Mapp Biopharmaceutical,s valiant effort to ... to fight the Ebola outbreak will make the ... production of pharmaceuticals can be, according to Kalorama ... while some may be taken aback by the ... industry knowledge are well aware of the complex ...
(Date:10/20/2014)... Oct. 20, 2014  GenVec, Inc. (NASDAQ: GNVC ... , Ph.D., from its board of directors effective on October ... 2003, and served as its chairman from June 2006 to ... Nominating and Corporate Governance and Audit Committees of the board.  ... a decade of dedicated service to GenVec, and its stockholders," ...
(Date:10/19/2014)... 19, 2014 The Latin American hardware ... in Latin America with analysis and forecast of revenue. ... and is expected to reach $2,366.8 million by 2018, ... , Browse through the TOC of the Latin American ... the in-depth analysis provided. It also provides a glimpse ...
Breaking Biology Technology:iCo Therapeutics Announces Advancement of Oral Amphotericin B Program 2iCo Therapeutics Announces Advancement of Oral Amphotericin B Program 3Kalorama: ZMapp Highlights Need For Faster Biopharmaceutical Production 2Kalorama: ZMapp Highlights Need For Faster Biopharmaceutical Production 3Zola P. Horovitz To Retire From GenVec Board 2The Latin American hardware encryption display market is expected to reach $2,366.8 million by 2018 - New Report by MicroMarket Monitor 2The Latin American hardware encryption display market is expected to reach $2,366.8 million by 2018 - New Report by MicroMarket Monitor 3
... , , OMAHA, Neb., Dec. 8 ... of its SURVEYOR Scan K-RAS kit, the first in a ... featuring its proprietary SURVEYOR Nuclease and WAVE ® HS ... to mutation detection that uses a PCR amplification reaction and ...
... , NEW YORK, Dec. 8 Reportlinker.com ... in its catalogue: , Microplate Instrumentation & ... http://www.reportlinker.com/p0164370/Microplate-Instrumentation--Supplies---A-Global-Market-Perspective.html , Playing a pivotal role in ... has come to replace conventional micro test tubes and ...
... ... , AMSTERDAM, December 8 , ... , Elsevier, a world-leading publisher of scientific, technical ... new SciVal Spotlight tool. The institutions, including,National Chiao Tung University (Taiwan), St. ...
Cached Biology Technology:Transgenomic Announces the Commercial Launch of SURVEYOR(R) Scan K-RAS Mutation Detection Kit 2Transgenomic Announces the Commercial Launch of SURVEYOR(R) Scan K-RAS Mutation Detection Kit 3Transgenomic Announces the Commercial Launch of SURVEYOR(R) Scan K-RAS Mutation Detection Kit 4Reportlinker Adds Microplate Instrumentation & Supplies - A Global Market Perspective 2Reportlinker Adds Microplate Instrumentation & Supplies - A Global Market Perspective 3Reportlinker Adds Microplate Instrumentation & Supplies - A Global Market Perspective 4Reportlinker Adds Microplate Instrumentation & Supplies - A Global Market Perspective 5Reportlinker Adds Microplate Instrumentation & Supplies - A Global Market Perspective 6Reportlinker Adds Microplate Instrumentation & Supplies - A Global Market Perspective 7Reportlinker Adds Microplate Instrumentation & Supplies - A Global Market Perspective 8SciVal Spotlight Gaining Momentum Across the Globe as More Universities Seek Multidisciplinary View of Research Performance 2SciVal Spotlight Gaining Momentum Across the Globe as More Universities Seek Multidisciplinary View of Research Performance 3
Rabbit polyclonal to XTP4 ( Abpromise for all tested applications). entrezGeneID: 84299 SwissProtID: Q9BRT3...
Assay Diluent 500 mls...
ICC Diluent Buffer 250 ml...
...
Biology Products: