Quantifying individual variation in behaviour: mixed-effect modelling approaches
TLDR
An overview of how mixed-effect models can be used to partition variation in, and correlations among, phenotypic attributes into between- and within-individual variance components is provided.Abstract:
Growing interest in proximate and ultimate causes and consequences of between- and within-individual variation in labile components of the phenotype - such as behaviour or physiology - characterizes current research in evolutionary ecology. The study of individual variation requires tools for quantification and decomposition of phenotypic variation into between- and within-individual components. This is essential as variance components differ in their ecological and evolutionary implications. We provide an overview of how mixed-effect models can be used to partition variation in, and correlations among, phenotypic attributes into between- and within-individual variance components. Optimal sampling schemes to accurately estimate (with sufficient power) a wide range of repeatabilities and key (co)variance components, such as between- and within-individual correlations, are detailed. Mixed-effect models enable the usage of unambiguous terminology for patterns of biological variation that currently lack a formal statistical definition (e.g. 'animal personality' or 'behavioural syndromes'), and facilitate cross-fertilisation between disciplines such as behavioural ecology, ecological physiology and quantitative genetics.read more
Citations
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Behavioural plasticity modulates temperature-related constraints on foraging time for a montane mammal
L. Embere Hall,Anna D. Chalfoun +1 more
TL;DR: The results suggest that, given sufficient resource quality and availability, plasticity in foraging activity may help temperature-limited endotherms adjust to climate-related constraints on foraging time.
Journal ArticleDOI
Turning Shy on a Winter's Day: Effects of Season on Personality and Stress Response in Microtus arvalis
Giulia Gracceva,Antje Herde,Ton G. G. Groothuis,Jaap M. Koolhaas,Rupert Palme,Jana A. Eccard +5 more
TL;DR: In this paper, the effects of seasonal changes in early life and in adulthood on behaviours (activity, exploration and anxiety), body mass and stress response, were tested in two experiments to simulate the conditions of winter and summer.
Journal ArticleDOI
Does personality affect premating isolation between locally-adapted populations?
Carolin Sommer-Trembo,Carolin Sommer-Trembo,David Bierbach,Lenin Arias-Rodriguez,Yesim Verel,Jonas Jourdan,Claudia Zimmer,Claudia Zimmer,Rüdiger Riesch,Bruno Streit,Martin Plath +10 more
TL;DR: The results suggest that personality affects female mate choice in a very nuanced fashion and population differences in the distribution of personality types could be facilitating or impeding reproductive isolation between diverging populations depending on the study system and the male trait upon which females base their mating decisions, respectively.
Journal ArticleDOI
Neophobia and social tolerance are related to breeding group size in a semi-colonial bird
Sophie Dardenne,Sophie Dardenne,Simon Ducatez,Julien Cote,Julien Cote,Pascal Poncin,Virginie M. Stevens,Virginie M. Stevens +7 more
TL;DR: It is shown that neophobia and social tolerance of adults are strongly related to breeding group size, and this parallel between group size and group composition in terms of individual personality offers a better understanding of the observed diversity inbreeding group size in this species.
Journal ArticleDOI
Intra- and inter-individual variation in the foraging ecology of a generalist subantarctic seabird, the gentoo penguin
TL;DR: It is shown that this species exhibits a large inter-individual variation in foraging behaviour with some individuals conducting very short trips close to the colony while others travelled considerably further, and there was a lack of correlation between body condition and foraging consistency.
References
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