Experimental evidence that female rhesus macaques (Macaca mulatta) perceive variation in male facial masculinity
| Autor: | Stuart Semple, Kevin A. Rosenfield, James P. Higham, Alexander V. Georgiev, Constance Dubuc, Dario Maestripieri |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Facial masculinity
0106 biological sciences media_common.quotation_subject 010603 evolutionary biology 01 natural sciences Competition (biology) Face shape Developmental psychology Perception biology.animal 0501 psychology and cognitive sciences Primate 050102 behavioral science & comparative psychology mate choice lcsh:Science media_common look-time experiment Multidisciplinary biology 05 social sciences facial masculinity Sexual dimorphism Variation (linguistics) Mate choice Evolutionary biology Sexual selection Masculinity sexual dimorphism Trait lcsh:Q Psychology |
| Zdroj: | Royal Society Open Science, Vol 6, Iss 1 (2019) |
| ISSN: | 2054-5703 |
| DOI: | 10.1098/rsos.181415 |
| Popis: | Among many primate species, face shape is sexually dimorphic, and male facial masculinity has been proposed to influence female mate choice and male–male competition by signalling competitive ability. However, whether conspecifics pay attention to facial masculinity has only been assessed in humans. In a study of free-ranging rhesus macaques, Macaca mulatta , we used a two-alternative look-time experiment to test whether females perceive male facial masculinity. We presented 107 females with pairs of images of male faces—one with a more masculine shape and one more feminine—and recorded their looking behaviour. Females looked at the masculine face longer than at the feminine face in more trials than predicted by chance. Although there was no overall difference in average look-time between masculine and feminine faces across all trials, females looked significantly longer at masculine faces in a subset of trials for which the within-pair difference in masculinity was most pronounced. Additionally, the proportion of time subjects looked toward the masculine face increased as the within-pair difference in masculinity increased. This study provides evidence that female macaques perceive variation in male facial shape, a necessary condition for intersexual selection to operate on such a trait. It also highlights the potential impact of perceptual thresholds on look-time experiments. |
| Databáze: | OpenAIRE |
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