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Origin of Cooperators and Defectors: Difference between revisions

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Even though the Snowdrift game has received relatively little attention in the literature it appears to be highly relevant in many biologically scenarios: Consider for example ''Saccharomyces cerevisiae'' a single-celled yeast species. The yeast cells secrete an enzyme which 'digests' their immediate surroundings (invertase hydrolyzes sucrose) and turns it into a food resource. Since this food resource is commonly available, it represents a public good that can be easily exploited by defectors that produce little or no enzyme (but rather reproduce faster). However, if no one produces the enzyme, everybody will die of starvation. Therefore, the costs and benefits of cooperative investments crucially depend on the present environment.
Even though the Snowdrift game has received relatively little attention in the literature it appears to be highly relevant in many biologically scenarios: Consider for example ''Saccharomyces cerevisiae'' a single-celled yeast species. The yeast cells secrete an enzyme which 'digests' their immediate surroundings (invertase hydrolyzes sucrose) and turns it into a food resource. Since this food resource is commonly available, it represents a public good that can be easily exploited by defectors that produce little or no enzyme (but rather reproduce faster). However, if no one produces the enzyme, everybody will die of starvation. Therefore, the costs and benefits of cooperative investments crucially depend on the present environment.


''This tutorial complements a series of [[#References|research articles]] by Michael Doebeli, Timothy Killingback & [http://www.math.ubc.ca/~hauert/ Christoph Hauert]''
''This tutorial complements a series of [[#References|research articles]] by Michael Doebeli, Timothy Killingback & [https://www.math.ubc.ca/~hauert/ Christoph Hauert]''
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== References ==
== References ==
# Killingback, T., [http://www.zoology.ubc.ca/~Edoebeli/ Doebeli, M.] & [http://www.math.ubc.ca/~hauert/ Hauert, C.] (2010) Cooperation and Defection in the Tragedy of the Commons, Biological Theory 5, 3-6 [http://dx.doi.org/10.1162/BIOT_a_00019 doi: 10.1162/BIOT_a_00019].  
# Killingback, T., [https://www.zoology.ubc.ca/~Edoebeli/ Doebeli, M.] & [https://www.math.ubc.ca/~hauert/ Hauert, C.] (2010) Cooperation and Defection in the Tragedy of the Commons, Biological Theory 5, 3-6 [https://dx.doi.org/10.1162/BIOT_a_00019 doi: 10.1162/BIOT_a_00019].  
# [http://www.zoology.ubc.ca/%7Edoebeli/ Doebeli, M.], [http://www.math.ubc.ca/~hauert/ Hauert, C.] & Killingback, T. (2004) The evolutionary origin of cooperators and defectors, [http://www.sciencemag.org ''Science''] '''306''', 859-862 [http://dx.doi.org/10.1126/science.1101456 doi: 10.1126/science.1101456].
# [https://www.zoology.ubc.ca/%7Edoebeli/ Doebeli, M.], [https://www.math.ubc.ca/~hauert/ Hauert, C.] & Killingback, T. (2004) The evolutionary origin of cooperators and defectors, [https://www.sciencemag.org ''Science''] '''306''', 859-862 [https://dx.doi.org/10.1126/science.1101456 doi: 10.1126/science.1101456].


=== Press & News ===
=== Press & News ===
# [http://www.sciencenews.org/articles/20050115/fob2ref.asp ''When Laziness Pays: Math explains how cooperation and cheating evolve''] (2005) [http://www.sciencenews.org/ ScienceNews] '''167''' (3) 35 by Erika Klarreich (January 15).
# [https://www.sciencenews.org/articles/20050115/fob2ref.asp ''When Laziness Pays: Math explains how cooperation and cheating evolve''] (2005) [https://www.sciencenews.org/ ScienceNews] '''167''' (3) 35 by Erika Klarreich (January 15).
# ''Egoismo e altruismo, sempre in equilibrio'' (2004) [http://www.corriere.it/ Il Corriere della Sera] (October 31) by Massimo Piattelli Palmarini.<br />''This article'' 'Egoism and altruism, always in equilibrium' ''appeared in an Italian national newspaper.''
# ''Egoismo e altruismo, sempre in equilibrio'' (2004) [https://www.corriere.it/ Il Corriere della Sera] (October 31) by Massimo Piattelli Palmarini.<br />''This article'' 'Egoism and altruism, always in equilibrium' ''appeared in an Italian national newspaper.''
# ''[http://www.welt.de/data/2004/11/22/363793.html Warum einige immer abr&auml;umen und andere st&auml;ndig draufzahlen] ''(2004) [http://www.welt.de Die Welt] (November 22) by Ranty Islam.<br />''This article'' 'Why some always scoop the market and others persistently overpay' ''appeared in a German national newspaper.''
# ''[https://www.welt.de/data/2004/11/22/363793.html Warum einige immer abr&auml;umen und andere st&auml;ndig draufzahlen] ''(2004) [https://www.welt.de Die Welt] (November 22) by Ranty Islam.<br />''This article'' 'Why some always scoop the market and others persistently overpay' ''appeared in a German national newspaper.''


== Acknowledgements ==
== Acknowledgements ==
These fascinating research results would have never been achieved without the inspiring discussions and advice from Michael Doebeli and Timothy Killingback. The evolutionary origin of this collection of tutorials lies in Karl Sigmund's encouragement, scientific inspiration and advice. To conquer the tricky subtleties of Java the patience and competence of Urs Bill was invaluable. Financial support of the [http://www.snf.ch Swiss National Science Foundation] is gratefully acknowledged.
These fascinating research results would have never been achieved without the inspiring discussions and advice from Michael Doebeli and Timothy Killingback. The evolutionary origin of this collection of tutorials lies in Karl Sigmund's encouragement, scientific inspiration and advice. To conquer the tricky subtleties of Java the patience and competence of Urs Bill was invaluable. Financial support of the [https://www.snf.ch Swiss National Science Foundation] is gratefully acknowledged.
[[Category:Tutorial]]
[[Category:Tutorial]]
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