Sexual selection and sexual size dimorphism in animals.
| Autor: | Janicke T; Centre d'Écologie Fonctionnelle et Évolutive, UMR 5175 CNRS, Université de Montpellier, École Pratique des Hautes Études, Montpellier, France.; Applied Zoology, Technical University Dresden, Zellescher Weg 20b, Dresden 01062, Germany., Fromonteil S; Centre d'Écologie Fonctionnelle et Évolutive, UMR 5175 CNRS, Université de Montpellier, École Pratique des Hautes Études, Montpellier, France. |
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| Jazyk: | angličtina |
| Zdroj: | Biology letters [Biol Lett] 2021 Sep; Vol. 17 (9), pp. 20210251. Date of Electronic Publication: 2021 Sep 15. |
| DOI: | 10.1098/rsbl.2021.0251 |
| Abstrakt: | Sexual selection is often considered as a critical evolutionary force promoting sexual size dimorphism (SSD) in animals. However, empirical evidence for a positive relationship between sexual selection on males and male-biased SSD received mixed support depending on the studied taxonomic group and on the method used to quantify sexual selection. Here, we present a meta-analytic approach accounting for phylogenetic non-independence to test how standardized metrics of the opportunity and strength of pre-copulatory sexual selection relate to SSD across a broad range of animal taxa comprising up to 95 effect sizes from 59 species. We found that SSD based on length measurements was correlated with the sex difference in the opportunity for sexual selection but showed a weak and statistically non-significant relationship with the sex difference in the Bateman gradient. These findings suggest that pre-copulatory sexual selection plays a limited role for the evolution of SSD in a broad phylogenetic context. |
| Databáze: | MEDLINE |
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