Case studies and mathematical models of ecological speciation: Cichlids in a crater lake

Détails

ID Serval
serval:BIB_E926F4F590C2
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Case studies and mathematical models of ecological speciation: Cichlids in a crater lake
Périodique
Molecular Ecology
Auteur(s)
Gavrilets S., Vose A., Barluenga M., Salzburger W., Meyer A.
ISSN
0962-1083
Statut éditorial
Publié
Date de publication
2007
Volume
16
Numéro
14
Pages
2893-2909
Résumé
A recent study of a pair of sympatric species of cichlids in Lake Apoyo in Nicaragua is viewed as providing probably one of the most convincing examples of sympatric speciation to date. Here, we describe and study a stochastic, individual-based, explicit genetic model tailored for this cichlid system. Our results show that relatively rapid (< 20 000 generations) colonization of a new ecological niche and (sympatric or parapatric) speciation via local adaptation and divergence in habitat and mating preferences are theoretically plausible if: (i) the number of loci underlying the traits controlling local adaptation, and habitat and mating preferences is small; (ii) the strength of selection for local adaptation is intermediate; (iii) the carrying capacity of the population is intermediate; and (iv) the effects of the loci influencing nonrandom mating are strong. We discuss patterns and timescales of ecological speciation identified by our model, and we highlight important parameters and features that need to be studied empirically to provide information that can be used to improve the biological realism and power of mathematical models of ecological speciation.
Mots-clé
ecological, mathematical, model, parapatric, speciation, sympatric
Création de la notice
19/11/2007 10:52
Dernière modification de la notice
20/08/2019 16:11
Données d'usage