Navigation Links
Study: Young Arctic muskoxen better at keeping warm than scientists thought
Date:8/20/2009

A new study finds that young muskoxen conserve heat almost as well as adults, a finding that runs contrary to a longstanding assumption among scientists that young animals should be more vulnerable in extreme cold. The study, by biologist Adam Munn from the University of Sydney, Australia, will be published in the forthcoming issue of Physiological and Biochemical Zoology.

Surviving freezing winters is tough for any animal, but it is generally assumed to be tougher on the young. Young animals theoretically should have a harder time holding heat because they have larger ratios of surface area to body volume, meaning more of their body mass is directly exposed to the cold. That theory appeared to hold true for muskoxenshaggy vegetarians that look a bit like buffalo, but are actually more closely related to sheep. Scientists have previously reported high death rates for muskox calves during especially cold winters in their arctic habitats.

But in measuring heat loss in adult and young muskoxen, Munn and his research team found that the cold itself might not be the culprit.

"To our surprise, we found that the smaller calves were not more thermally stressed than larger adults," said Munn said.

Munn and his team observed a population of muskoxen at the University of Alaska's R.G. White Large Animal Research Facility in Fairbanks. They used infrared sensing equipment to measure heat loss from the body surface of animals in contact with cold air and the frozen ground. Munn tested the muskoxen during winter foraging, when the animals were the most directly exposed to the cold.

The researchers found that both calves and adults sacrificed only two to six percent of their daily energy intake to heat loss during foraging bouts, even when temperatures dipped to minus 50 Celsius (minus 58 Fahrenheit).

"This suggests that any thermoregulatory constraints associated with a small body size may not be as important fo
'/>"/>

Contact: Kevin Stacey
kstacey@press.uchicago.edu
773-834-0386
University of Chicago Press Journals
Source:Eurekalert

Page: 1 2

Related biology news :

1. Study: diabetic neuropathy costs billions per year in lost work time
2. Study: Fountain of youth for your heart?
3. First-ever study: lack of critical lubricant causes wear in joints
4. Mayo Clinic study: Ossurs collars superior in immobilization and reduction of pressure
5. Study: weight-loss tips differ in African-American, mainstream magazines
6. Smithsonian study: Sediment prediction tools off the mark
7. Mouse study: When it comes to living longer, its better to go hungry than go running
8. Geisinger study: Inflammatory disease causes blindness
9. Stanford study: Bioenergy potential of reviving abandoned agricultural land
10. U-M study: Herceptin targets breast cancer stem cells
11. Study: Future snowmelt in West twice as early as expected; threatens ecosystems and water reserves
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/19/2014)... , Dec. 18, 2014 Research and ... the addition of the "iPhone 5S Fingerprint ... Report" report to their offering. ... the acquisition of AuthenTec in July 2012, Apple ... 5S. It is currently the only device of ...
(Date:12/19/2014)... , Dec. 18, 2014  23andMe, Inc., the ... a study that pinpoints fine-scale differences in genetic ancestry ... . Since immigrants first arrived more ... States has served as a meeting place ... American history and the ongoing mixing of peoples with ...
(Date:12/17/2014)... --Research and Markets ( http://www.researchandmarkets.com/research/s6qzt5/samsung_galaxy_s5 ) ... Galaxy S5 - Home Button Synaptics Fingerprint Sensor ... http://photos.prnewswire.com/prnh/20130307/600769 ... the iPhone 5S, Samsung introduces for the first ... The Galaxy S5 home button presents an ...
Breaking Biology News(10 mins):iPhone 5S Fingerprint Sensor - Apple/AuthenTec TMDR92 & Sapphire - Technology Report 223andMe Study Sketches Genetic Portrait of the United States 223andMe Study Sketches Genetic Portrait of the United States 323andMe Study Sketches Genetic Portrait of the United States 4Samsung Galaxy S5 - Home Button Synaptics Fingerprint Sensor Technology Analysis 2
... New York University biologists have uncovered how the innate ... neurons. The findings, published as the cover study in ... neurons fight the virus at multiple stages--by preventing the ... virus' release, which could infect other cells in the ...
... today in the journal Genome,Research that they have ... a 554-kilobase-pair genomic,segment near the centromere of the ... genes that could be implicated in,sex-associated height differences ... one of the few holes remaining in the,"finished" ...
... in comparison to the 3.2 gigabases of its human ... 14 proteins, which play different roles in promoting viral ... host’s cellular machinery—including RNA polymerases, which carry out transcription—to ... chromosomal DNA. Once the virus is integrated (now called ...
Cached Biology News:NYU Study Reveals How Brain's Immune System Fights Viral Encephalitis 2Found: Missing sequence of the human Y chromosome 2Found: Missing sequence of the human Y chromosome 3Novel Enzyme Shows Potential As An Anti-HIV Target 2Novel Enzyme Shows Potential As An Anti-HIV Target 3
(Date:12/19/2014)... (PRWEB) December 19, 2014 Bioject ... developer and manufacturer of needle-free injection technology, today ... with Immunomic Therapeutics, Inc. (“ITI”) for ITI to ... with its LAMP™ vaccine platform. , In ... exclusive Worldwide license to the Biojector®-2000 that triggers ...
(Date:12/19/2014)... 19, 2014 BioPlus Specialty Pharmacy ... announces the promotion of Nick Maroulis, Pharm.D. to the ... Services. , In this position, Dr. Maroulis will ... managing the directors of our multi-site pharmacies as the ... 1997 and during that time he has served in ...
(Date:12/19/2014)... , Dec. 19, 2014  Roche (SIX: RO, ROG; ... Technologies, Inc. (Bina), a privately held company based ... USA. Bina provides a big data platform for ... (NGS) data. Bina,s proprietary on-market Genomic Management Solution, ... researchers to perform fast and scalable analyses to ...
(Date:12/19/2014)... Dec. 19, 2014 Decision Resources Group finds ... at a 12 percent compound annual growth rate through ... aging population and the increasing adoption of dental implants. ... will also spur demand for dental biomaterials because ... and periodontal treatments. Other key findings from ...
Breaking Biology Technology:Bioject and Immunomic Therapeutics Enter into an Agreement for License of Needle-Free Technology for LAMP-vax Vaccines 2Bioject and Immunomic Therapeutics Enter into an Agreement for License of Needle-Free Technology for LAMP-vax Vaccines 3BioPlus Specialty Pharmacy Promotes Dr. Nick Maroulis to Vice President of Specialty Pharmacy Services 2Roche acquires Bina Technologies and enters the genomic informatics market 2Roche acquires Bina Technologies and enters the genomic informatics market 3Latin American Dental Biomaterial Market Will Expand at a 12 Percent Annual Growth Rate Through 2023 2Latin American Dental Biomaterial Market Will Expand at a 12 Percent Annual Growth Rate Through 2023 3
... Jan. 3 Escalon Medical Corp.,(Nasdaq Capital Market: ... 510(k) clearance from the U.S. Food and Drug,Administration ... The MASTER-VU(TM) System consists of a B-scan probe ... (via a USB cable,connection) using Sonomed,s proprietary software, ...
... Jan. 3 Cinpathogen, through its,partnership in the ... clinical diagnostic technology consulting,services to Shanghai area hospitals. ... the,Shanghai Health Study, the Center has diagnosed and ... in collaboration with area,hospitals and colleagues at Fudan ...
... KENILWORTH, N.J., Jan. 2 Schering-Plough,Corporation (NYSE: ... and Drug,Administration (FDA) has assigned priority review status ... Sugammadex is specifically designed to reverse the ... States as ZEMURON(R) (rocuronium,bromide) and vecuronium bromide. Muscle ...
Cached Biology Technology:Escalon(R) Announces FDA 510(k) Clearance for Sonomed MASTER-VU(TM) B-Scan System 2Escalon(R) Announces FDA 510(k) Clearance for Sonomed MASTER-VU(TM) B-Scan System 3Cinpathogen Provides Clinical Diagnostic Consulting Services to Shanghai Area Hospitals 2Schering-Plough Announces New Drug Application for Sugammadex Assigned Priority Review Status by U.S. FDA 2Schering-Plough Announces New Drug Application for Sugammadex Assigned Priority Review Status by U.S. FDA 3Schering-Plough Announces New Drug Application for Sugammadex Assigned Priority Review Status by U.S. FDA 4
... Biotech presents PsiPort Mass Directed Auto ... and data acquisition system designed for ... the life science and pharmaceutical discovery ... specifically to simplify high throughput mass ...
... Anti-M13 Anti-M13 polyclonal antibody was ... M13 bacterial phage particles.Recombinant protein domains such ... M13 coat protein pIII and displayed on ... the phage-based system utilized in the Ph.D. ...
... Ligation Kit enables ligation of ... in just 5 min at ... the DNA concentration, either circular ... (high DNA concentration) ligation products ...
... Kinase catalyzes the transfer of ... the 5-terminus of polynucleotides or ... group. The enzyme, purified from ... used to phosphorylate RNA, DNA ...
Biology Products: