TY - GEN A1 - Dammhahn, Melanie A1 - Dingemanse, Niels J. A1 - Niemelae, Petri T. A1 - Reale, Denis T1 - Pace-of-life syndromes BT - a framework for the adaptive integration of behaviour, physiology and life history T2 - Behavioral ecology and sociobiology N2 - This introduction to the topical collection on Pace-of-life syndromes: a framework for the adaptive integration of behaviour, physiology, and life history provides an overview of conceptual, theoretical, methodological, and empirical progress in research on pace-of-life syndromes (POLSs) over the last decade. The topical collection has two main goals. First, we briefly describe the history of POLS research and provide a refined definition of POLS that is applicable to various key levels of variation (genetic, individual, population, species). Second, we summarise the main lessons learned from current POLS research included in this topical collection. Based on an assessment of the current state of the theoretical foundations and the empirical support of the POLS hypothesis, we propose (i) conceptual refinements of theory, particularly with respect to the role of ecology in the evolution of (sexual dimorphism in) POLS, and (ii) methodological and statistical approaches to the study of POLS at all major levels of variation. This topical collection further holds (iii) key empirical examples demonstrating how POLS structures may be studied in wild populations of (non) human animals, and (iv) a modelling paper predicting POLS under various ecological conditions. Future POLS research will profit from the development of more explicit theoretical models and stringent empirical tests of model assumptions and predictions, increased focus on how ecology shapes (sex-specific) POLS structures at multiple hierarchical levels, and the usage of appropriate statistical tests and study designs. Significance statement As an introduction to the topical collection, we summarise current conceptual, theoretical, methodological and empirical progress in research on pace-of-life syndromes (POLSs), a framework for the adaptive integration of behaviour, physiology and life history at multiple hierarchical levels of variation (genetic, individual, population, species). Mixed empirical support of POLSs, particularly at the within-species level, calls for an evaluation and refinement of the hypothesis. We provide a refined definition of POLSs facilitating testable predictions. Future research on POLSs will profit from the development of more explicit theoretical models and stringent empirical tests of model assumptions and predictions, increased focus on how ecology shapes (sex-specific) POLSs structures at multiple hierarchical levels and the usage of appropriate statistical tests and study designs. Y1 - 2018 U6 - https://doi.org/10.1007/s00265-018-2473-y SN - 0340-5443 SN - 1432-0762 VL - 72 IS - 3 PB - Springer CY - New York ER - TY - JOUR A1 - Montiglio, Pierre-Olivier A1 - Dammhahn, Melanie A1 - Messier, Gabrielle Dubuc A1 - Reale, Denis T1 - The pace-of-life syndrome revisited BT - the role of ecological conditions and natural history on the slow-fast continuum JF - Behavioral ecology and sociobiology N2 - The pace-of-life syndrome (i.e., POLS) hypothesis posits that behavioral and physiological traits mediate the trade-off between current and future reproduction. This hypothesis predicts that life history, behavioral, and physiological traits will covary under clearly defined conditions. Empirical tests are equivocal and suggest that the conditions necessary for the POLS to emerge are not always met. We nuance and expand the POLS hypothesis to consider alternative relationships among behavior, physiology, and life history. These relationships will vary with the nature of predation risk, the challenges posed by resource acquisition, and the energy management strategies of organisms. We also discuss how the plastic response of behavior, physiology, and life history to changes in ecological conditions and variation in resource acquisition among individuals determine our ability to detect a fast-slow pace of life in the first place or associations among these traits. Future empirical studies will provide most insights on the coevolution among behavior, physiology, and life history by investigating these traits both at the genetic and phenotypic levels in varying types of predation regimes and levels of resource abundance. KW - Behavior KW - Immunity KW - Life history strategies KW - Metabolism KW - Personality KW - Trait interaction Y1 - 2018 U6 - https://doi.org/10.1007/s00265-018-2526-2 SN - 0340-5443 SN - 1432-0762 VL - 72 IS - 7 PB - Springer CY - New York ER - TY - JOUR A1 - Dammhahn, Melanie A1 - Landry-Cuerrier, Manuelle A1 - Reale, Denis A1 - Garant, Dany A1 - Humphries, Murray M. T1 - Individual variation in energy-saving heterothermy affects survival and reproductive success JF - Functional ecology : an official journal of the British Ecological Society N2 - 1. Given fundamental energetic trade-offs among growth, maintenance and reproduction, individual differences in energy saving should have consequences for survival and reproductive success. Many endotherms use periodic heterothermy to reduce energy and water requirements and individual variation in heterothermy should have fitness consequences. However, attempts to disentangle individual- and population-level variation in heterothermy are scarce. 2. Here, we quantified patterns of heterothermy of 55 free-ranging eastern chipmunks (Tamias striatus), food-hoarding hibernators. Over five hibernation periods, we obtained a total of 7108 daily individual heterothermy indices (median: 118 per individual). 3. Based on an individual reaction norm approach, we found that the use of heterothermy was repeatable and varied among individuals of the same population under similar environmental conditions. This among-individual variation had consequences for winter survival and reproductive success. Individuals using less heterothermy at the beginning of the winter had decreased survival in resource-rich but not in resource-poor years and higher reproductive success in the subsequent breeding season. 4. These results support the hypothesis that fluctuating selection maintains heterothermic diversity and suggest that individualized ecophysiology can contribute to a more thorough understanding of the evolution of energy-saving strategies in endotherms. KW - fitness consequences KW - hibernation KW - individual differences KW - individual reaction norm KW - Tamias striatus KW - torpor Y1 - 2017 U6 - https://doi.org/10.1111/1365-2435.12797 SN - 0269-8463 SN - 1365-2435 VL - 31 SP - 866 EP - 875 PB - Wiley CY - Hoboken ER -