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Linking energy availability, movement, and sociality in a wild primate (Papio ursinus)

Ines Fuertbauer Orcid Logo, Chloe Shergold, Charlotte Christensen, Anna M. Bracken, Michael Heistermann, Marina Papadopoulou Orcid Logo, M. Justin O’Riain, Andrew King Orcid Logo

Philosophical Transactions of the Royal Society B, Volume: 379, Issue: 1916

Swansea University Authors: Ines Fuertbauer Orcid Logo, Chloe Shergold, Marina Papadopoulou Orcid Logo, Andrew King Orcid Logo

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DOI (Published version): 10.1098/rstb.2022.0466

Abstract

Proximate mechanisms of 'social ageing’, i.e. shifts in social activity and narrowing of social networks, are understudied. It is proposed that energetic deficiencies (which are often seen in older individuals) may restrict movement and, in turn, sociality, but empirical tests of these intermed...

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Published in: Philosophical Transactions of the Royal Society B
ISSN: 0962-8436 1471-2970
Published: Royal Society 2024
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URI: https://cronfa.swan.ac.uk/Record/cronfa67598
Abstract: Proximate mechanisms of 'social ageing’, i.e. shifts in social activity and narrowing of social networks, are understudied. It is proposed that energetic deficiencies (which are often seen in older individuals) may restrict movement and, in turn, sociality, but empirical tests of these intermediary mechanisms are lacking. Here, we study wild chacma baboons (Papio ursinus), combining measures of faecal triiodothyronine (fT3), a non-invasive proxy for energy availability, high-resolution GPS data (movement and social proximity), and accelerometery (social grooming durations). Higher (individual mean-centred) fT3 was associated with increased residency time (i.e. remaining in the same area longer) which, in turn, was positively related to social opportunities (i.e. close physical proximity). Individuals with more frequent social opportunities received more grooming whereas for grooming given, fT3 moderated this effect, suggesting an energetic cost of giving grooming. While our results support the spirit of the energetic deficiencies hypothesis, the directionality of the relationship between energy availability and movement is unexpected and suggests that lower-energy individuals may use strategies to reduce costs of intermittent locomotion. Thus, future work should consider whether age-related declines in sociality may be a by-product of a strategy to conserve energy.
Keywords: Social ageing, energy, movement, thyroid hormones, grooming, baboons
College: Faculty of Science and Engineering
Funders: We thank the Association for the Study of Animal Behaviour for supporting part of this work with a research grant awarded to I.F.
Issue: 1916