Navigation Links
Study finds evolution doesn't always favor bigger animals

ass in colder environments.

Biologists had long assumed that Bergmann's Rule--named after the 19 th century German biologist Christian Bergmann--reflected the adaptation of warm-blooded animals to become larger when they move in colder environments. The reason: Bigger animals have smaller surface to volume ratios and can more effectively conserve heat in cold environments. Similarly, smaller animals with larger surface to volume ratios are better adapted to warmer environments where they can more effectively dissipate heat.

However, this simple relationship doesn't explain why ostracodes and other cold-blooded creatures that do not regulate their internal body temperatures, such as mollusks to turtles, also follow this rule.

"It is a bit of a puzzle why Bergmann's Rule holds in cold-blooded animals like ostracodes," said Hunt.

Hunt and Roy found that as ocean temperatures declined by some 10 degrees centigrade, from 40 million years ago to the present day, the overall size of the deep-sea ostracode Poseidonamicus dramatically increased.

"It's not just that the small species got replaced by a larger species," said Roy. "The same species, the same lineage got bigger over time."

In addition, the biologists discovered that the body size increases in nine species of ostracodes that evolved over that 40 million year span were commensurate with the change expected given how much the ocean temperatures decreased over this time and how body sizes of living ostracodes vary with temperature. On average, for every degree centigrade of climatic cooling, each of the species of Poseidonamicus increased in length by about 29 micrometers.

Hunt and Roy said biologists are uncertain what may be triggering this biological response to larger size from cool environments. Nevertheless, the UCSD study is important because it establishes a firm link between climatic change and the body size of organisms, paving the way for a bet
'"/>

Source:University of California - San Diego


Page: 1 2 3

Related biology news :

1. Novel Asthma Study Shows Multiple Genetic Input Required; Single-gene Solution Shot Down
2. Emory Study Tests Bone Marrow Stem Cells to Improve Circulation in Legs
3. UCLA Study Shows One-Third of Drug Ads in Medical Journals Do Not Contain References Supporting Medical Claims
4. Study Demonstrates Gene Expression Microarrays are Comparable and Reproducible
5. Study Links Ebola Outbreaks To Animal Carcasses
6. Breakthrough Microarray-based Technology for the Study of Cancer
7. NYU Study Reveals How Brains Immune System Fights Viral Encephalitis
8. Study finds more than one-third of human genome regulated by RNA
9. Leukemia Drug Breakthrough Study In New England Journal Of Medicine
10. Study identifies predictors of HIV drug resistance in patients beginning triple therapy
11. New Study from Affymetrix Laboratories Points to Changing View of How Genome Works
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Study finds evolution doesn always favor bigger animals

(Date:12/19/2014)... Dec. 18, 2014  23andMe, Inc., the leading personal ... that pinpoints fine-scale differences in genetic ancestry of individuals ... Since immigrants first arrived more than four ... has served as a meeting place for peoples ... and the ongoing mixing of peoples with African, European, ...
(Date:12/17/2014)... , Dec. 15, 2014  HITLAB SM ... Clinical Practices (GCP) audit to confirm its adherence ... regulations. This accomplishment enables HITLAB to conduct regulated ... the highest principles for patient safety and research ... global healthcare access, quality, and delivery with innovative ...
(Date:12/15/2014)... Dec. 12, 2014 Research and Markets ... of the "Global Facial Recognition Market 2015-2019" ... http://photos.prnewswire.com/prnh/20130307/600769 Facial recognition ... individuals. Facial recognition system measures the overall facial ... edges, mouth, and the distance between eyes. Facial ...
Breaking Biology News(10 mins):23andMe 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 4HITLAB Completes GCP Audit for FDA Smart Device & App Compliance 2Global Facial Recognition Market 2015-2019: Key Vendors are 3M Cogent, Cognitec Systems, NEC and Safran Group 2Global Facial Recognition Market 2015-2019: Key Vendors are 3M Cogent, Cognitec Systems, NEC and Safran Group 3
... In 1911, the influential geneticist Charles Davenport published ... how genetics would improve society in the 20th century. ... widespread eugenics movement in the United States. Although the ... have long been rejected, many of the issues raised by ...
... they grow older, but autopsy data from a long-range study ... that the brains of a third of those who had ... the type of small, cumulative injury that can come from ... presented the study results at Experimental Biology 2008 in San ...
... University researchers report today in the journal Nature Genetics ... be associated with a dramatically lower risk of developing ... insight that rare mutations may collectively play a large ... such as hypertension also has implications for the diagnosis ...
Cached Biology News:Reflecting on the social implications of human genetics research -- past, present and future 21/3 of risk for dementia attributable to small vessel disease, autopsy study shows 2Yale study shows how rare genes have big impact on blood pressure 2
(Date:12/24/2014)... 23, 2014 SoundConnect’s ... designed to introduce cutting edge communication technology, ... partners of platform upgrades. This webinar series ... users in their quest to leverage web ... According to SoundConnect’s Marketing Manager, Seanna Baumgartner, ...
(Date:12/24/2014)... report expects global cell isolation and expansion market to ... carefully analyzed data about the vital drivers, restraints, trends, ... Copy of Report @ http://bit.ly/1yUxy0T , According ... will keep witnessing growth at an impressive CAGR during ... by rapid technological advancements, government funding and investments, and ...
(Date:12/24/2014)... 2014 Sigma-Aldrich Corporation (NASDAQ: ... under the Hart-Scott-Rodino Antitrust Improvements Act (HSR Act) ... 22, 2014, thereby completing the U.S. HSR Act ... of the Company by Merck KGaA, Darmstadt, Germany.  ... condition to closing the transaction, which remains subject ...
(Date:12/22/2014)... 22, 2014 /PRNewswire/ - RepliCel Life Sciences Inc. (OTCQB: ... focused on the development of autologous cell therapies, announced ... University of Calgary in conjunction with co-authors from Kyoto ... validates the company,s ongoing clinical research using dermal sheath ... baldness. The paper entitled " Hair Follicle ...
Breaking Biology Technology:SoundConnect Launches Leading Edge Business Communications Webinar Series 2SoundConnect Launches Leading Edge Business Communications Webinar Series 3The Cell Expansion Market is Expected to Reach $14.8 billion by 2019 - New Research Report by MarketsandMarkets 2The Cell Expansion Market is Expected to Reach $14.8 billion by 2019 - New Research Report by MarketsandMarkets 3Acquisition of Sigma-Aldrich by Merck KGaA, Darmstadt, Germany, Receives U.S. Antitrust Clearance 2Acquisition of Sigma-Aldrich by Merck KGaA, Darmstadt, Germany, Receives U.S. Antitrust Clearance 3Newly Released Peer-Reviewed Publication Further Validates RepliCel's Use of Dermal Sheath Cup Cells to Treat Pattern Baldness 2Newly Released Peer-Reviewed Publication Further Validates RepliCel's Use of Dermal Sheath Cup Cells to Treat Pattern Baldness 3Newly Released Peer-Reviewed Publication Further Validates RepliCel's Use of Dermal Sheath Cup Cells to Treat Pattern Baldness 4Newly Released Peer-Reviewed Publication Further Validates RepliCel's Use of Dermal Sheath Cup Cells to Treat Pattern Baldness 5
... May 6 Sigma-Aldrich Corporation,(Nasdaq: SIAL ) ... Stock Conference,on Tuesday, May 13th at 1:20 PM ... via live audio broadcast over the,Internet available at ... to access this file. For the webcast on, ...
... May 6 Sigma-Aldrich Corporation,(Nasdaq: SIAL ) will ... on Tuesday, May 13th at 10:40 AM Pacific Time ... audio broadcast over the,Internet available at http://ir.sigmaaldrich.com . ... For the webcast on, http://ir.sigmaaldrich.com users will need ...
... May 6 ExonHit Therapeutics S.A.,(Alternext: ALEHT), ... the availability of its new SpliceArray(TM) for ... the basic and pre-clinical,research communities. These SpliceArray(TM) ... for the rat genome commercially,available today. ExonHit,s ...
Cached Biology Technology:ExonHit Launches Rat Genome SpliceArray(TM) Products to Expand High Resolution Gene Expression Profiling for use in Disease Modeling and Toxicogenomics 2ExonHit Launches Rat Genome SpliceArray(TM) Products to Expand High Resolution Gene Expression Profiling for use in Disease Modeling and Toxicogenomics 3
... and low background ,This solution greatly enhances ... higher than obtained with conventional methods. ,Two ... and secondary antibodies, which can suppress the ... , Wide versatility ,It is applicable to ...
Chicken Anti-Human Stomatin-like 2 (STOML2 Polyclonal AntibodyNew Applications: ELISA, Western Blot...
Anti-Chicken IgY, (IgG) F(ab')2 Fragment Specific....
... Antibody, Unconjugated Applications: ... Use at an assay dependent dilution. WB: Use ... this concentration is determined using a whole extract ... Not tested in other applications. Optimal dilutions/concentrations ...
Biology Products: