Evolutionary Branching under Asymmetric Competition

E. Kisdi

Working Papers from International Institute for Applied Systems Analysis

Abstract: I investigate the evolution of a continuous trait, such as body size or arms level, which affects the outcome of competitive contests such that the contestant with the larger trait value has a higher probability of winning. I show that a polymorphism of distinctly different strategies can evolve in an initially monomorphic population even if mutations have only small phenotypic effect. In a simple Lotka-Volterra type model of asymmetric competition, I derive the conditions under which two strategies can gradually evolve from a single ancestral strategy; the evolution of higher level polymorphisms is studied by numerical analysis and computer simulations of specific examples. High levels of polymorphism may build up during evolution. The coevolution of strategies in polymorphic populations, however, may also lead to extinction, which decreases the level of polymorphism. I discuss whether the evolution of several haploid strategies from a single initial strategy may correspond to the evolution of several sympatric species in a diploid outbreeding population.

Date: 1998-05
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
http://www.iiasa.ac.at/Publications/Documents/IR-98-045.pdf (application/pdf)
Our link check indicates that this URL is bad, the error code is: 404 Not Found (http://www.iiasa.ac.at/Publications/Documents/IR-98-045.pdf [301 Moved Permanently]--> https://www.iiasa.ac.at/Publications/Documents/IR-98-045.pdf [301 Moved Permanently]--> https://iiasa.ac.at//Publications/Documents/IR-98-045.pdf [302 Found]--> https://iiasa.ac.at/Publications/Documents/IR-98-045.pdf)
http://www.iiasa.ac.at/Publications/Documents/IR-98-045.ps (application/postscript)
Our link check indicates that this URL is bad, the error code is: 404 Not Found (http://www.iiasa.ac.at/Publications/Documents/IR-98-045.ps [301 Moved Permanently]--> https://www.iiasa.ac.at/Publications/Documents/IR-98-045.ps [301 Moved Permanently]--> https://iiasa.ac.at//Publications/Documents/IR-98-045.ps [302 Found]--> https://iiasa.ac.at/Publications/Documents/IR-98-045.ps)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:wop:iasawp:ir98045

Access Statistics for this paper

More papers in Working Papers from International Institute for Applied Systems Analysis Contact information at EDIRC.
Bibliographic data for series maintained by Thomas Krichel ().