Format

Send to

Choose Destination
See comment in PubMed Commons below
J Theor Biol. 2005 Aug 7;235(3):393-401.

Stochastic evolutionary dynamics on two levels.

Author information

1
Institut für Theoretische Physik und Astrophysik, Christian-Albrechts Universität, Olshausenstr. 40, D-24098 Kiel, Germany. traulsen@theo-physik.uni-kiel.de

Abstract

We consider a population that is subdivided into groups. Individuals reproduce proportional to their fitness. When a group reaches a certain size it has a probability to split into two groups while another group is eliminated. In this stochastic process, the number of groups is constant, while the total population size fluctuates between well-defined bounds. We calculate the fixation probability of newly introduced mutants under constant selection. We show that the described population structure acts as a suppressor of selection compared to an unstructured population of the same size. The maximum suppression of selection is obtained, when the number of groups equals the number of individuals per group. We also study opposing selection on two or more levels by analysing the evolutionary dynamics of hierarchically embedded Moran processes.

PMID:
15882701
DOI:
10.1016/j.jtbi.2005.01.019
[Indexed for MEDLINE]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science
    Loading ...
    Support Center