Navigation Links
Huddling and a drop in metabolism allow penguins to survive the South Pole cold

March of the Penguins, the Oscar® winning documentary, showed how the emperor penguins endure their incubation and fast for four dark and bitterly cold months each year. The tight huddling among these South Pole penguins is a key energy-saving mechanism that allows them to endure their extremely harsh conditions.

A team of scientists that had already shown that emperor penguins who are free ranging in their colony spend about 50 percent of their time in dense huddles and drop their average metabolic rate by 25 percent has questioned whether this drop is due to a process similar to hibernation. Entering into the colony with bulb thermometers, earlier investigators had indeed found that huddling penguins maintain a lower rectal temperature than birds which were isolated from the colony (35.7°C vs. 37.9°C, respectively). However, a sustained drop in deep body (core) temperature would be in direct conflict with the requirements for successful egg incubation. Therefore, energy savings accrued from huddling might rely on mechanisms other than a lower body temperature.

To better understand this mechanism, the researchers conducted the first recordings of deep body temperatures in free ranging birds throughout their breeding cycle by using long-term implanted data loggers. The researchers sought to assess whether male emperor penguins lower their deep body temperature during breeding and incubation. Additionally, using external devices during pairing and visual observations of implanted males during incubation, they sought to study deep body temperature variations when the birds were huddling.

Study Published in American Journal of Physiology-Regulatory/Comparative

The authors of the study entitled "Body Temperature Changes Induced by Huddling in Breeding Male Emperor Penguins," are conducted by Caroline Gilbert, Yvon Le Maho and André Ancel, all from the Institut Pluridisciplinaire Hubert Curien, Département Ecologie, Physi
'"/>

Source:American Physiological Society


Page: 1 2 3 4

Related biology news :

1. Opposing fat metabolism pathways triggered by a single gene
2. Attacks of King George IIIs madness linked to key metabolism molecule
3. Computational model simulates AZT metabolism in mitochondria
4. Researchers attack tumor cells by exploiting dependency on sugar metabolism
5. Primitive yeast yields secrets of human cholesterol and drug metabolism
6. Researchers find how protein allows insects to detect and respond to pheromones
7. Enzyme allows B cells to resist death, leading to leukemia
8. Tiny scaffolding allows stem cells to become working fat cells
9. Self-assembled nano-sized probes allow Penn researchers to see tumors through flesh and skin
10. Technique may allow cancer patients to freeze eggs, preserving fertility before starting treatment
11. PET/CT can identify new cancer lesions at early stage, allowing for prompt treatment
Post Your Comments:
(Date:9/18/2014)... a world-leading provider of scientific, technical and medical ... Management Society (ARMS), recognized the academic research achievements ... Young Researcher of the Year Awards. , The ... Convention Centre and in conjunction with the ARMS ... Australia,s and New Zealand,s scientific community. Guest of ...
(Date:9/18/2014)... their entire lives nestling in the protective tentacles of ... they sometimes travel hundreds of kilometres across the open ... fish has been predicted, this is the first time ... populations has been observed. , Dr Steve Simpson, Senior ... University of Exeter, and colleagues from the Australian Research ...
(Date:9/17/2014)... Fauna Europaea started in 2000 as an EC-FP5 four-year ... years of steady progress and successful participations in several ... European Biodiversity Observation Network project (EU BON), to ... the contributors and to extend the general dissemination of ... Journal has applied its novel e-Publishing tools ...
Breaking Biology News(10 mins):Elsevier and Australasian Research Management Society award scientists at Scopus ceremony 2Expedition finds Nemo can travel great distances to connect populations 2Expedition finds Nemo can travel great distances to connect populations 3Contributions on Fauna Europaea: Data papers as innovative model on expert involvement 2
... methodology for governments and corporations to determine the availability ... Environmental Science & Technology . In "Methodology of ... scarce metals using a methodology that determines their supply ... "In the past few years, a number of ...
... as cooking with carbon spaghetti: A Kansas State University ... with carbon nanotubes -- ultrasmall tubes that look like ... -- made of graphene, an atom-thick sheet of carbon ... and rechargeable batteries, according to research by Gurpreet Singh, ...
... nasty shocks. Economies can crash, fisheries can collapse, and climates ... currently requires the collection of enormous and often prohibitive amounts ... the Max-Planck-Institute for the Physics of Complex Systems in Germany ... UK could change this. In a paper published in the ...
Cached Biology News:New methodology assesses risk of scarce metals 2The right recipe: Engineering research improves laser detectors, batteries 2The right recipe: Engineering research improves laser detectors, batteries 3Predicting system crashes in nature and society 2
(Date:9/18/2014)... 18, 2014  MEI Pharma, Inc. (Nasdaq: MEIP ... novel therapies for cancer, announced today that Daniel P. ... at BioCentury,s NewsMakers in the Biotech Industry conference ... from the Millennium Broadway Hotel & Conference Center in ... presentation can be accessed at www.meipharma.com . A replay ...
(Date:9/18/2014)... ST. LOUIS , Sept. 18, 2014 /PRNewswire/ ... ) announced today it has entered into a ... Michigan (U-M) Medical School,s Vector Core. Under the ... Sigma CRISPR technology, experimental design consultation, and dedicated ... poised to accelerate gene editing-based research at the ...
(Date:9/18/2014)... Now a team led by an engineer at Michigan ... that will let scientists slash the cost of one ... Syringe pumps are used to dispatch precise amounts of ... a reaction. They can also cost hundreds or even ... of Michigan Tech students published the library of free ...
(Date:9/18/2014)... The quest for the ultimate memory device for computing ... at The City College of New York led by ... exhibit both magnetic and ferroelectric properties. , Combining both ... can occur between them and for the devices that ... Combining these two properties in a single material, however, ...
Breaking Biology Technology:MEI Pharma To Present At BioCentury's NewsMakers Conference 2MEI Pharma To Present At BioCentury's NewsMakers Conference 3Sigma-Aldrich, University of Michigan Medical School Establish CRISPR Core Lab Partnership 2Sigma-Aldrich, University of Michigan Medical School Establish CRISPR Core Lab Partnership 3Sigma-Aldrich, University of Michigan Medical School Establish CRISPR Core Lab Partnership 4Doing science just got cheaper -- and faster 2Oxides discovered by CCNY team could advance memory devices 2
... California (USC) have, for the first time in history, derived ... will enable scientists to create far more effective animal models ... , The research will be published in the Dec. 26 ... is a major development in stem cell research because we ...
... bacteria. However, how the step from gene to anti-bacterial effect ... B. Pseudomallei, a bacterium suitable for bioweapons, had ... human body for many years without being detected by the ... throughout the body, resulting in the patient dying from blood ...
... researcher has created a compound that prevents replication of the ... for the disease. , "The outbreak of SARS in 2003 ... there is currently no treatment," said Arun Ghosh, the Purdue ... not currently a threat, there is the concern that SARS ...
Cached Biology Technology:USC researchers derive first embryonic stem cells from rats 2USC researchers derive first embryonic stem cells from rats 3Purdue researcher invents molecule that stops SARS 2Purdue researcher invents molecule that stops SARS 3
When added to either StemSep CD4+ or CD8+ T Cell Enrichment cocktails, human HLA-DR TAC is designed to deplete human HLA-DR from samples to isolate resting CD4+ or CD8+ T cells....
When added to either StemSep CD4+ or CD8+ T Cell Enrichment cocktails, human CD69 TAC is designed to deplete human CD69 from samples to isolate resting CD4+ or CD8+ T cells....
This kit is designed to select cells labeled with phycoerythrin- (PE-) conjugated antibodies. Kit includes reagents for labeling 3 x 10 9 cells and EasySep magnet....
No-Weigh Dithiothreitol (DTT) ,7.7 mg DTT/Tube x 48 tubes...
Biology Products: