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

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2023

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Dunning, Jamie
Burke, Terry
Chik, Heung Ying Janet
Evans, Tim
Schroeder, Julia

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Behavioral Ecology. Oxford University Press. 2023, 34(3), pp. 315-324. ISSN 1045-2249. eISSN 1465-7279. Available under: doi: 10.1093/beheco/arac124

Zusammenfassung

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.

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570 Biowissenschaften, Biologie

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ISO 690DUNNING, Jamie, Terry BURKE, Hoi Hang CHAN, Heung Ying Janet CHIK, Tim EVANS, Julia SCHROEDER, 2023. Opposite-sex associations are linked with annual fitness, but sociality is stable over lifetime. In: Behavioral Ecology. Oxford University Press. 2023, 34(3), pp. 315-324. ISSN 1045-2249. eISSN 1465-7279. Available under: doi: 10.1093/beheco/arac124
BibTex
@article{Dunning2023Oppos-66632,
  year={2023},
  doi={10.1093/beheco/arac124},
  title={Opposite-sex associations are linked with annual fitness, but sociality is stable over lifetime},
  number={3},
  volume={34},
  issn={1045-2249},
  journal={Behavioral Ecology},
  pages={315--324},
  author={Dunning, Jamie and Burke, Terry and Chan, Hoi Hang and Chik, Heung Ying Janet and Evans, Tim and Schroeder, Julia}
}
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