Behavioural mediators of genetic life-history trade-offs: a test of the pace-of-life syndrome hypothesis in field crickets

Abstract

TITLEBehavioural mediators of genetic life-history trade-offs: a test of the pace-of-life syndrome hypothesis in field crickets AUTHORS Santostafano, F; Wilson, A J; Niemala, PT; et al. JOURNAL Proceedings of the Royal Society B: Biological Sciences DEPOSITED IN ORE February 2018This version available at http://hdl.handle.net/10871/31632 COPYRIGHT AND REUSEOpen Research Exeter makes this work available in accordance with publisher policies. A NOTE ON VERSIONSThe version presented here may differ from the published version. If citing, you are advised to consult the published version for pagination, volume/issue and date of publication 1 TITLE PAGE

Pace-of-life syndromes: a framework for the adaptive integration of behaviour, physiology and life history

“…Santostefano et al 2017). Thus, the negative relationship between current and future reproduction (trade-off) or the expected correlation between life history and other traits may not be found because it may be hidden due to environmental effects.…”

“…For example, assuming that a risky behaviour mediates the trade-off between investment in current and future reproduction, the specific prediction here is that risky behaviour increases resource acquisition at the expense of survival (Wolf et al 2007;Réale et al 2010a). Other phenotypic characters may instead be quasi-independent (sensu Araya-Ajoy and Dingemanse 2014) because they have instead coevolved as adaptations to other, associated, trade-offs such as the one between number and quality of offspring per reproductive event and therefore are associated to some but not other life-history traits involved in the trade-off between current and future reproduction (for an empirical example, see Santostefano et al 2017). This topical collection refines the extended POLS hypothesis, positing that natural selection has favoured the adaptive integration of syndromes of life-history, behavioural and physiological traits.…”

“…Thus, the negative relationship between current and future reproduction (trade-off) or the expected correlation between life history and other traits may not be found because it may be hidden due to environmental effects. This is a classical issue in the study of trade-offs or costs of reproduction (van Noordwijk and de Jong 1986;Cheverud 1988;Roff 1995;Reznick et al 2000), but it can be extended to the study of any type of association or syndrome (Dingemanse and Dochtermann 2013;Santostefano et al 2017). For example, Jablonszky et al (2018), topical collection on Pace-of-life syndromes showed in their empirical study of POLS in collared flycatchers, Ficedula albicollis, that although risk-taking behaviour was negatively related to survival and positively to reproductive investment, high-quality individuals would still survive better and invest more into reproduction.…”

“…A forceful demonstration of a POLS requires a repeated measures design, where both traits are repeatedly assayed across years within the same set of individuals, such that multi-level statistical approaches (e.g. bivariate mixed-effects models; Dingemanse and Dochtermann 2013) can be used to estimate the among-individual correlation of interest from the phenotypic data or a pedigree design to separate the genetic from the environmental component of the correlation between the traits (Niemelä et al 2013;Santostefano et al 2017).…”

Individual variation in age‐dependent reproduction: Fast explorers live fast but senesce young?

“…Other studies, by contrast, report zero or opposite relationships between risky behaviours, reproduction and life span (e.g. Nicolaus, Piault, Ubels, Tinbergen, & Dingemanse, ; Niemelä, Dingemanse, Alioravainen, Vainikka, & Kortet, ; Santostefano, Wilson, Niemelä, & Dingemanse, ); the validity of POLS concept is therefore subject to debate (Mathot & Frankenhuis, ; Royaute et al, ).…”