Female mating preference functions predict sexual selection against hybrids between sibling species of cichlid fish.

Détails

ID Serval
serval:BIB_5DCDC9B92941
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Female mating preference functions predict sexual selection against hybrids between sibling species of cichlid fish.
Périodique
Philosophical Transactions of the Royal Society of London. Series B, Biological sciences
Auteur(s)
van der Sluijs I., Van Dooren T.J., Hofker K.D., van Alphen J.J., Stelkens R.B., Seehausen O.
ISSN
0962-8436
Statut éditorial
Publié
Date de publication
2008
Peer-reviewed
Oui
Volume
363
Numéro
1505
Pages
2871-2877
Langue
anglais
Résumé
The evolutionary outcome of interspecific hybridization, i.e. collapse of species into a hybrid swarm, persistence or even divergence with reinforcement, depends on the balance between gene flow and selection against hybrids. If female mating preferences are open-ended but sign-inversed between species, they can theoretically be a source of such selection. Cichlid fish in African lakes have sustained high rates of speciation despite evidence for widespread hybridization, and sexual selection by female choice has been proposed as important in the origin and maintenance of species boundaries. However, it had never been tested whether hybridizing species have open-ended preference rules. Here we report the first experimental test using Pundamilia pundamilia, Pundamilia nyererei and their hybrids in three-way choice experiments. Hybrid males are phenotypically intermediate. Wild-caught females of both species have strong preferences for conspecific over heterospecific males. Their responses to F1 hybrid males are intermediate, but more similar to responses to conspecifics in one species and more similar to responses to heterospecifics in the other. We suggest that their mate choice mechanism may predispose haplochromine cichlids to maintain and perhaps undergo phenotypic diversification despite hybridization, and that species differences in female preference functions may predict the potential for adaptive trait transfer between hybridizing species.
Mots-clé
Animals, Cichlids/genetics, Cichlids/physiology, Female, Genetic Speciation, Hybridization, Genetic, Male, Mating Preference, Animal/physiology, Pigments, Biological, Sex Characteristics
Pubmed
Web of science
Création de la notice
17/12/2008 16:21
Dernière modification de la notice
20/08/2019 14:15
Données d'usage