Male cognitive performance declines in the absence of sexual selection.

Détails

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Etat: Public
Version: Final published version
ID Serval
serval:BIB_A4160140AFC7
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Male cognitive performance declines in the absence of sexual selection.
Périodique
Proceedings of the Royal Society. B Biological Sciences
Auteur(s)
Hollis B., Kawecki T.J.
ISSN
1471-2954 (Electronic)
ISSN-L
0962-8452
Statut éditorial
Publié
Date de publication
2014
Peer-reviewed
Oui
Volume
281
Numéro
1781
Pages
20132873
Langue
anglais
Résumé
Sexual selection is responsible for the evolution of male ornaments and armaments, but its role in the evolution of cognition--the ability to process, retain and use information--is largely unexplored. Because successful courtship is likely to involve processing information in complex, competitive sexual environments, we hypothesized that sexual selection contributes to the evolution and maintenance of cognitive abilities in males. To test this, we removed mate choice and mate competition from experimental populations of Drosophila melanogaster by enforcing monogamy for over 100 generations. Males evolved under monogamy became less proficient than polygamous control males at relatively complex cognitive tasks. When faced with one receptive and several unreceptive females, polygamous males quickly focused on receptive females, whereas monogamous males continued to direct substantial courtship effort towards unreceptive females. As a result, monogamous males were less successful in this complex setting, despite being as quick to mate as their polygamous counterparts with only one receptive female. This diminished ability to use past information was not limited to the courtship context: monogamous males (but not females) also showed reduced aversive olfactory learning ability. Our results provide direct experimental evidence that the intensity of sexual selection is an important factor in the evolution of male cognitive ability.
Mots-clé
sexual selection, cognition, learning, experimental evolution, courtship, Drosophila
Pubmed
Web of science
Création de la notice
26/02/2014 11:39
Dernière modification de la notice
20/08/2019 16:09
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