A1 Journal article (refereed)
The evolution of mating preferences for genetic attractiveness and quality in the presence of sensory bias (2022)

Henshaw, J. M., Fromhage, L., & Jones, A. G. (2022). The evolution of mating preferences for genetic attractiveness and quality in the presence of sensory bias. Proceedings of the National Academy of Sciences of the United States of America, 119(33), Article e2206262119. https://doi.org/10.1073/pnas.2206262119

JYU authors or editors

Publication details

All authors or editors: Henshaw, Jonathan M.; Fromhage, Lutz; Jones, Adam G.

Journal or series: Proceedings of the National Academy of Sciences of the United States of America

ISSN: 0027-8424

eISSN: 1091-6490

Publication year: 2022

Publication date: 08/08/2022

Volume: 119

Issue number: 33

Article number: e2206262119

Publisher: National Academy of Sciences

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1073/pnas.2206262119

Research data link: https://doi.org/10.5061/dryad.zs7h44jcv

Publication open access: Openly available

Publication channel open access: Partially open access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/82540

Abstract

The aesthetic preferences of potential mates have driven the evolution of a baffling diversity of elaborate ornaments. Which fitness benefit—if any—choosers gain from expressing such preferences is controversial, however. Here, we simulate the evolution of preferences for multiple ornament types (e.g., “Fisherian,” “handicap,” and “indicator” ornaments) that differ in their associations with genes for attractiveness and other components of fitness. We model the costs of preference expression in a biologically plausible way, which decouples costly mate search from cost-free preferences. Ornaments of all types evolved in our model, but their occurrence was far from random. Females typically preferred ornaments that carried information about a male’s quality, defined here as his ability to acquire and metabolize resources. Highly salient ornaments, which key into preexisting perceptual biases, were also more likely to evolve. When males expressed quality-dependent ornaments, females invested readily in costly mate search to locate preferred males. In contrast, the genetic benefits associated with purely arbitrary ornaments were insufficient to sustain highly costly mate search. Arbitrary ornaments could nonetheless “piggyback” on mate-search effort favored by other, quality-dependent ornaments. We further show that the potential to produce attractive male offspring (“sexy sons”) can be as important as producing offspring of high general quality (“good genes”) in shaping female preferences, even when preferred ornaments are quality dependent. Our model highlights the importance of mate-search effort as a driver of aesthetic coevolution.

Keywords: selecting a couple; sexual selection; male animals; female animals; dressing up; sexual attraction; genes; heredity; evolutionary biology; causality

Free keywords: sexual selection; mate choice; ornament; handicap; causal inference

Contributing organizations

Ministry reporting: Yes

Reporting Year: 2022

Preliminary JUFO rating: 3