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Old 28th April 2012, 02:54 PM
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Darwinsbulldog Darwinsbulldog is offline
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Default Evolutionary Trade-Offs, Pareto Optimality, etc

Evolutionary Trade-Offs, Pareto Optimality, and the Geometry of Phenotype Space
O. Shoval, H. Sheftel, G. Shinar, Y. Hart, O. Ramote, A. Mayo, E. Dekel, K. Kavanagh, and U. Alon
published 27 April 2012, 10.1126/science.1217405

Biological systems that need to perform multiple tasks face a fundamental trade-off: A given phenotype cannot be optimal at all tasks. Here, we ask how trade-offs affect the range of phenotypes found in nature. Using the Pareto front concept from economics and engineering, we find that best-trade-off phenotypes are weighted averages of archetypes—phenotypes specialized for single tasks. For two tasks, phenotypes fall on the line connecting the two archetypes, which could explain linear trait correlations and allometric relationships, as well as bacterial gene-expression patterns. For three tasks, phenotypes fall within a triangle in phenotype space, whose vertices are the archetypes, as evident in morphological studies including Darwin's finches. Tasks can be inferred from measured phenotypes based on the behavior of organisms nearest the archetypes.



The one truly amazing thing about religion is its capacity to turn a human brain into a mass with the intellectual capacity of mashed potato.

Last edited by Darwinsbulldog; 28th January 2013 at 07:44 PM.
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Old 2nd May 2012, 09:54 PM
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Slothhead Slothhead is offline
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Default Re: Evolutionary Trade-Offs, Pareto Optimality, etc

Good post DB. This is something that i am incorporating into my PhD.
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