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:1/22/2015)... 2015 Research and Markets ( http://www.researchandmarkets.com/research/wxdglm/global_wearable ... "Global Wearable Technologies Market and Applications, Opportunities, Industry ... Forecast 2014-2020" report to their offering. ... that can be worn on the user,s body ...
(Date:12/22/2014)... DUBLIN , Dec. 22, 2014 Research and ... the addition of the "The Global Watermarking ... http://photos.prnewswire.com/prnh/20130307/600769 ... global digital media watermarking and fingerprinting markets. Watermarking ...
(Date:12/19/2014)... 18, 2014   LaunchKey , the first decentralized mobile ... Internet of Things era, today announced the close of ... was led by Metamorphic Ventures with participation from ENIAC ... and others.  LaunchKey has raised $4 million to date, ...
Breaking Biology News(10 mins):Global Wearable Technologies Market and Applications, Opportunities, Industry Analysis, Segmentation, Size, Growth, Share, Overview, Trends and Forecast 2014-2020 2The Global Watermarking and Fingerprinting Markets 2LaunchKey Raises $3 Million in Additional Funding Led by Metamorphic Ventures 2LaunchKey Raises $3 Million in Additional Funding Led by Metamorphic Ventures 3
... History Survey have found that overall, concentrations of arsenic, selenium, ... Illinois River do not appear to be a health concern ... of the study have been published in the journal ... fillets was below the US Food and Drug Administration Action ...
... Hebrew university of Jerusalem have created a molecule that ... dementia or Alzheimer,s disease. Recent studies indicate that ... and non-diabetics are a risk factor for the development ... function. Diabetics have also been found to have twice ...
... in adulthood will be investigated as part of a major ... The 7.4 million programme, funded by the European Commission, ... eat and the types of food we choose. The ... eating habits develop and the influence of hunger, emotions, stress ...
Cached Biology News:Research shows arsenic, mercury and selenium in Asian carp not a health concern to most 2New molecule protects brain from detrimental effects linked to diabetes and high blood sugar 280 million SEK study seeks to explain what drives our appetites 2
(Date:1/22/2015)... Nueva Jersey , 22 de enero de 2015  El ... abre hoy su llamada a nominaciones para 2015. Este ... ha hecho, o tiene el potencial para hacer, contribuciones ... nominaciones se aceptarán hasta el 15 de marzo de ...
(Date:12/25/2014)... The report “Service Quality Management and ... Provider Type - Global Advancements, Worldwide Forecasts & Analysis ... analysis and forecasting of revenues. , Browse 152 ... and in-depth TOC on “Service Quality Management (SQM) and ...
(Date:12/24/2014)... December 23, 2014 “Preparative & ... HPLC, Flash), Consumables (Columns, Solvents, Buffers, Valves, Guages, ... & Agriculture) - Forecasts to 2019” provides a ... opportunities, current market trends, and strategies impacting the ...
(Date:12/24/2014)... Long Island, New York (PRWEB) December 23, 2014 ... , and the Long Island Affiliate of ITRA Global, the ... economy’s slow but steady recovery. This is evidenced by ... and the strong stock market. Low energy costs have ...
Breaking Biology Technology:El Dr. Paul Janssen Award for Biomedical Research emite su llamada a los nominados para 2015 2El Dr. Paul Janssen Award for Biomedical Research emite su llamada a los nominados para 2015 3El Dr. Paul Janssen Award for Biomedical Research emite su llamada a los nominados para 2015 4Service Quality Management Market worth $2.1 Billion & Telco Customer Experience Management Market worth $2.3 Billion by 2019 – New Report by MarketsandMarkets 2Service Quality Management Market worth $2.1 Billion & Telco Customer Experience Management Market worth $2.3 Billion by 2019 – New Report by MarketsandMarkets 3Service Quality Management Market worth $2.1 Billion & Telco Customer Experience Management Market worth $2.3 Billion by 2019 – New Report by MarketsandMarkets 4Preparative and Process Chromatography Market is expected to reach $9 billion by 2019 - New Report by Marketsandmarkets 2Preparative and Process Chromatography Market is expected to reach $9 billion by 2019 - New Report by Marketsandmarkets 3Preparative and Process Chromatography Market is expected to reach $9 billion by 2019 - New Report by Marketsandmarkets 4ITRA Global Reports Long Island Is Out of Sync With The National Office Market 2ITRA Global Reports Long Island Is Out of Sync With The National Office Market 3
... Community...promotes entertainment everywhere on any device , ,MADISON, ... the sale of the companys desktop products group for ... transaction is now complete and Sony Pictures Digitals Executive ... keep the companys employee base in Madison and in ...
... become leader in alternative energy , ,Madison, WI ... purchase agreement with two developers that will build three ... produced in Wisconsin by 400%. , ,Under the agreement, ... Midwest Wind Energy, LLC, based in Chicago, will provide ...
... Build it, and they will come is an acceptable strategy ... diamond in an Iowa cornfield, but its not normally the ... team of partners in place, the La Crosse Health Science ... transfer Field of Dreams. , ,The $27 million, 168,000-square-foot center ...
Cached Biology Technology:Sony Completes Acquisition of Sonic Foundry 2Sony Completes Acquisition of Sonic Foundry 3WE Energies Is Not Letting Wind Power Blow Away 2La Crosse Health Science Center is an Evolving Example of Collaboration 2La Crosse Health Science Center is an Evolving Example of Collaboration 3
... be used with all 96-well ... stacking of covered plates ... with automated systems ... are available for use with ...
... Two sizes available for use with 96- or 384-well ... 96 for ease of location on 96-tube plates ... the skirt of the plate* Efficient sealing is ... in conjunction with screw or clip-down hot lid thermal ...
... reagent is intended for use as a wash ... Michels Transport Fluid is useful for transportation of ... for immunofluorescence studies. Samples may remain in ... room temperature. Michels Transport Fluid is not ...
... HistoMark Biotin Streptavidin-HRP Systems provide rapid, ... intracellular antigens in frozen or paraffin-embedded ... These systems also facilitate double or ... be performed simultaneously with primary antibodies ...
Biology Products: