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Also appears in collection : Probability and biological evolution / Probabilités et évolution biologique

Maladapted individuals can only colonise a new habitat if they can evolve a positive growth rate fast enough to avoid extinction - evolutionary rescue. We use the infinitesimal model to follow the evolution of the growth rate, and find that the probability that a single migrant can establish depends on just two parameters: the mean and genetic variance of fitness. With continued migration, establishment is inevitable. However, above a threshold migration rate, the population may be trapped in a sink state, in which adaptation is held back by gene flow. By assuming a constant genetic variance, we develop a diffusion approximation for the joint distribution of population size and trait mean.

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Citation data

  • DOI 10.24350/CIRM.V.19418003
  • Cite this video Etheridge, Alison M.; Barton, Nicholas H. (27/06/2018). Establishment in a new habitat under the infinitesimal model. CIRM. Audiovisual resource. DOI: 10.24350/CIRM.V.19418003
  • URL https://dx.doi.org/10.24350/CIRM.V.19418003

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