Opposite-sex associations are linked with annual fitness, but sociality is stable over lifetime

Jamie Dunning*, Terry Burke, Alex Hoi Hang Chan, Janet Chik, Tim Evans, Julia Schroeder

*Bijbehorende auteur voor dit werk

OnderzoeksoutputAcademicpeer review

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Animal sociality, an individual’s propensity to associate with others, has fitness consequences through mate choice, for example, directly, by increasing the pool of prospective partners, and indirectly through increased survival, and individuals benefit from both. Annually, fitness consequences are realized through increased mating success and subsequent fecundity. However, it remains unknown whether these consequences translate to lifetime fitness. Here, we quantified social associations and their link to fitness annually and over lifetime, using a multi-generational, genetic pedigree. We used social network analysis to calculate variables representing different aspects of an individual’s sociality. Sociality showed high within-individual repeatability. We found that birds with more opposite-sex associates had higher annual fitness than those with fewer, but this did not translate to lifetime fitness. Instead, for lifetime fitness, we found evidence for stabilizing selection on opposite-sex sociality, and sociality in general, suggesting that reported benefits are only short-lived in a wild population, and that selection favors an average sociality.
Originele taal-2English
Pagina's (van-tot)315–324
Aantal pagina's10
TijdschriftBehavioral Ecology
Nummer van het tijdschrift3
StatusPublished - 8-mrt.-2023

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