A marker of biological ageing predicts adult risk preference in European starlings, Sturnus vulgaris

Behavioral Ecology : Official Journal of the International Society for Behavioral Ecology
Clare AndrewsMelissa Bateson

Abstract

Why are some individuals more prone to gamble than others? Animals often show preferences between 2 foraging options with the same mean reward but different degrees of variability in the reward, and such risk preferences vary between individuals. Previous attempts to explain variation in risk preference have focused on energy budgets, but with limited empirical support. Here, we consider whether biological ageing, which affects mortality and residual reproductive value, predicts risk preference. We studied a cohort of European starlings (Sturnus vulgaris) in which we had previously measured developmental erythrocyte telomere attrition, an established integrative biomarker of biological ageing. We measured the adult birds' preferences when choosing between a fixed amount of food and a variable amount with an equal mean. After controlling for change in body weight during the experiment (a proxy for energy budget), we found that birds that had undergone greater developmental telomere attrition were more risk averse as adults than were those whose telomeres had shortened less as nestlings. Developmental telomere attrition was a better predictor of adult risk preference than either juvenile telomere length or early-life food supply ...Continue Reading

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Citations

Nov 6, 2018·The Journal of Craniofacial Surgery·Hye-Youn SonJi-Ung Park
Jan 18, 2018·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Melissa Bateson, Daniel Nettle
Nov 21, 2019·The Behavioral and Brain Sciences·Gili GreenbaumNicole Creanza
Sep 28, 2018·The Behavioral and Brain Sciences·Nicolas Baumard
Oct 6, 2020·Biological Reviews of the Cambridge Philosophical Society·Nicholas P MoranKlaus Reinhold
Oct 24, 2020·Science·Joan Silk

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