Navigation Links
Social parasites of the smaller kind
Date:8/24/2007

Cooperation is widespread in the natural world but so too are cheats mutants that do not contribute to the collective good but simply reap the benefits of others cooperative efforts. In evolutionary terms, cheats should indeed prosper, so how cooperation persists despite the threat of cheat takeover is a fundamental question. Recently, biologists at the Universities of Edinburgh and Oxford have found that in bacteria, cheats actually orchestrate their own downfall.

In the study, reported in the September issue of The American Naturalist, the team explored the impact of cheats in populations of the notorious pathogen, Pseudomonas aeruginosa. These bacteria cooperate to scavenge iron from their environment, but mutant cheats do not contribute their fair share of scavenger molecules and instead simply steal the iron supplies of others.

Cheats are kept in check by simple frequency dependence, says Adin Ross-Gillespie, lead author of the study. When rare, cheats prosper at the expense of cooperators, but as they become more common, the profitability of their strategy declines. At equilibrium, neither strategy has the upper hand, so the two coexist.

But, the authors note, this pattern arises only under certain conditions. In this case, it arose because population productivity, too, was sensitive to the frequency of cheats. Cultures with few cheats grew rapidly and achieved larger absolute sizes in the time available, providing greater opportunity for cheats to exploit the situation. Meanwhile, cultures comprising high proportions of cheats grew poorly. Too many cheats spoil the broth, quips Ross-Gillespie.

Microbes cooperate extensively, and their social activities often have profound medical or economic importance. Studies such as this help us to better understand how cooperative traits evolve and persist. Who knows" Perhaps some day we will harness the power of cheats to direct the dynamics of bacterial populations.


'/>"/>

Contact: Suzanne Wu
swu@press.uchicago.edu
773-834-0386
University of Chicago Press Journals
Source:Eurekalert

Page: 1 2

Related biology news :

1. Elephants imitate sounds as a form of social communication
2. Biologists determine genetic blueprint of social amoeba
3. Gorilla susceptibility to Ebola virus: the cost of sociality
4. Shifty-eyed Monkeys Offer Window Into Brains Social Reflexes
5. Rodent social behavior encoded in junk DNA
6. Discovery that bacterium is phosphate gourmet key clue to what makes it most social of bacteria
7. Sudden change in social status triggers genetic response in male fish, study finds
8. Ancient DNA provides clues to the evolution of social behavior
9. Mice lacking social memory molecule take bullying in stride
10. Sociality of sweat bees evolved simultaneously during climate change
11. ASU researchers find link between social behavior, maternal traits in bees
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/30/2014)... research, involving mice and published in the October 2014 ... , suggests that just because you can do ... team of Italian scientists have found that using marijuana ... immune system. This damage may result in autoimmune diseases ... bowel disease and rheumatoid arthritis in adulthood. , "I ...
(Date:9/30/2014)... MILFORD, Mass. , Sept. 30, 2014 ... process control solutions for the biotech and ... of its new RECONN Bioprocess Manager, an ... reporting solution geared towards bioprocess development laboratories. ... facilities have disparate bioreactor and analyzer systems. ...
(Date:9/29/2014)... A new study confirms that the exposure to tar ... than of regular cigarettes. Similarly, exposure to nicotine ... increasingly popular type of cigarette in several countries around ... of certain toxic chemicals in the smoke of these ... because lower levels of chemicals in the smoke are ...
Breaking Biology News(10 mins):Adolescent exposure to thc may cause immune systems to go up in smoke 2Spectra Automation Introduces RECONN Bioprocess Manager 2Slim cigarette smokers not exposed to more harmful chemicals 2
... Hall of Fame quarterback Dan Marino and VitaCore Health ... specific nutritional supplements based on authentic sciences. Marino joined ... develop health products that will strongly impact how consumers ... specifically in terms of their joints, heart, wellbeing, endurance, ...
... The stories they could tell, these fishes that once swam ... In the 1960s and ,70s, Richard Rosenblatt, a marine ... on field expeditions to remote places to study the fishes ... waters, Rosenblatt and other scientists retrieved hundreds of specimens of ...
... (BRONX, NY) Scientists at Albert Einstein ... a desktop genome analyzer and browser that allows biologists ... data. The open-source software, called GenPlay, is described in ... genomic data is analyzed mainly by information specialists rather ...
Cached Biology News:Dan Marino Teams up with VitaCore Health Products 2Dan Marino Teams up with VitaCore Health Products 3'Library of Fishes' to feature thousands of specimens from remote locations 2'Library of Fishes' to feature thousands of specimens from remote locations 3Einstein offers easy-to-use genome analyzer to scientific community 2
(Date:9/30/2014)... This news release is available in German . ... photonic crystal around several quantum dots in a semiconductor layer. ... a consequence of atomic processes. If a short laser pulse ... modified and the quantum dot experiences a change in the ... slow down the emission of light by the dot. As ...
(Date:9/30/2014)... , Sept. 30, 2014 Pacific Northwest ... Summary Global Markets Direct,s, ,Pacific Northwest ... provides an overview of the Pacific Northwest Biotechnology, ... report provides comprehensive information on the current therapeutic ... with comparative analysis at various stages, therapeutics assessment ...
(Date:9/30/2014)... Over the last decade, the laboratory filtration market ... and increased acceptance of new filtration technologies in end ... are also catalyzing the growth of laboratory filtration market. ... grow at a strong CAGR during the forecast period ... million by 2019. The market is mainly driven by ...
(Date:9/30/2014)... 30, 2014 CORD:USE Cord Blood Bank – ... it has entered into an Equity and Exclusive Services ... licensed a series of patented technologies for the isolation of ... applications.  Tianhe is performing Phase I/II clinical trials in ... using Tianhe,s Stem Cell Educator Therapy showing ...
Breaking Biology Technology:Ultrafast remote switching of light emission 2Pacific Northwest Biotechnology, LLC - Product Pipeline Review - 2014 2Pacific Northwest Biotechnology, LLC - Product Pipeline Review - 2014 3Global Laboratory Filtration Market To See 7.0% CAGR to 2019 Says a Research Report Available at ReportsnReports.com 2Global Laboratory Filtration Market To See 7.0% CAGR to 2019 Says a Research Report Available at ReportsnReports.com 3Global Laboratory Filtration Market To See 7.0% CAGR to 2019 Says a Research Report Available at ReportsnReports.com 4Global Laboratory Filtration Market To See 7.0% CAGR to 2019 Says a Research Report Available at ReportsnReports.com 5CORD:USE is Pleased to Announce it has Partnered with Tianhe Stem Cell Biotechnologies, Developer of Cord Blood Stem Cell Therapy Showing Promising Results in Clinical Trials for the Treatment of Diabetes and Autoimmune Diseases 2CORD:USE is Pleased to Announce it has Partnered with Tianhe Stem Cell Biotechnologies, Developer of Cord Blood Stem Cell Therapy Showing Promising Results in Clinical Trials for the Treatment of Diabetes and Autoimmune Diseases 3CORD:USE is Pleased to Announce it has Partnered with Tianhe Stem Cell Biotechnologies, Developer of Cord Blood Stem Cell Therapy Showing Promising Results in Clinical Trials for the Treatment of Diabetes and Autoimmune Diseases 4
... , , WASHINGTON , Jan. 27 ... which are increasingly used for research and therapeutic interventions, but extracting ... have found evidence that fat tissue, known as adipose tissue, may ... called hematopoietic stem and progenitor cells (HSPCs), according to a ...
... , , , , , , ... Biologic,Products, Inc. (Nasdaq: CBPO ) ("China Biologic," or the "Company"), ... responded to,allegations regarding the Company, certain members of its Board of ... online,financial websites. , The article, which was ...
... Obtain Stem Cells From Embryos , WHITE PLAINS, N.Y. ... reprogrammed adult cells into embryonic-like stem cells has been chosen to receive ... Shinya Yamanaka , MD, PhD, of the Gladstone Institute of Cardiovascular Disease, ... will be honored with the 2010 March of Dimes Prize for his ...
Cached Biology Technology:Fat Tissue May Be a Source of Valuable Blood Stem Cells, Study Says 2Fat Tissue May Be a Source of Valuable Blood Stem Cells, Study Says 3Fat Tissue May Be a Source of Valuable Blood Stem Cells, Study Says 4China Biologic Products Responds to Allegations on Financial Websites 2China Biologic Products Responds to Allegations on Financial Websites 3China Biologic Products Responds to Allegations on Financial Websites 4China Biologic Products Responds to Allegations on Financial Websites 5March of Dimes Awards $250,000 Prize to Scientist Who Discovered How to Reprogram Human Cells 2
Gridded Cell Culture Petri Dish (20 mm molded in base), tissue-culture treated...
...
...
... in conjuction with Annexin V-FITC to distinguish ... of apoptosis (Annexin V positive, PI negative) ... of apoptosis or already dead (Annexin V-FITC ... the orange range of the spectrum using ...
Biology Products: