Titre
Inconsistency between different measures of sexual selection.
Type
article
Institution
UNIL/CHUV/Unisanté + institutions partenaires
Périodique
Auteur(s)
Fitze, P.S.
Auteure/Auteur
Le Galliard, J.F.
Auteure/Auteur
Liens vers les personnes
Liens vers les unités
ISSN
1537-5323
Statut éditorial
Publié
Date de publication
2011
Volume
178
Numéro
2
Première page
256
Dernière page/numéro d’article
68
Peer-reviewed
Oui
Langue
anglais
Résumé
Measuring the intensity of sexual selection is of fundamental importance to the study of sexual dimorphism, population dynamics, and speciation. Several indices, pools of individuals, and fitness proxies are used in the literature, yet their relative performances are strongly debated. Using 12 independent common lizard populations, we manipulated the adult sex ratio, a potentially important determinant of the intensity of sexual selection at a particular time and place. We investigated differences in the intensity of sexual selection, as estimated using three standard indices of sexual selection-the standardized selection gradient (β'), the opportunity of selection (I), and the Bateman gradient (βss)--calculated for different pools of individuals and different fitness proxies. We show that results based on estimates of I were the opposite of those derived from the other indices, whereas results based on estimates of β' were consistent with predictions derived from knowledge about the species' mating system. In addition, our estimates of the strength and direction of sexual selection depended on both the fitness proxy used and the pool of individuals included in the analysis. These observations demonstrate inconsistencies in distinct measures of sexual selection and underscore the need for caution when comparing studies and species.
PID Serval
serval:BIB_1029791C3F46
PMID
Open Access
Oui
Date de création
2011-03-18T23:30:25.530Z
Date de création dans IRIS
2025-05-20T15:49:30Z
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Nom
BIB_1029791C3F46.P001.pdf
Version du manuscrit
published
Taille
7.18 MB
Format
Adobe PDF
PID Serval
serval:BIB_1029791C3F46.P001
URN
urn:nbn:ch:serval-BIB_1029791C3F468
Somme de contrôle
(MD5):78dd819e5afe39cd265183d5b5f4ea7d