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
More filters
Journal ArticleDOI
Selection on fish personality differs between a no-take marine reserve and fished areas
Susanna Huneide Thorbjørnsen,Even Moland,David Villegas-Ríos,Katinka Bleeker,Halvor Knutsen,Esben Moland Olsen +5 more
TL;DR: It is suggested that the diversity of fish home range sizes could be preserved by establishing networks of marine reserves encompassing different habitat types, ensuring both a heterogeneity in environmental conditions and fishing pressure.
Posted ContentDOI
Individual heterogeneity and capture-recapture models: what, why and how?
TL;DR: This work defines what individual heterogeneity means and clarifies the terminology used in the literature, and explains how to model individual heterogeneity in capture-recapture models and provides the code to fit these models.
Journal ArticleDOI
Repeatable glucocorticoid expression is associated with behavioural syndromes in males but not females in a wild primate
Patrick J. Tkaczynski,Patrick J. Tkaczynski,Caroline Ross,Julia Lehmann,Mohamed Mouna,Bonavaentura Majolo,Ann MacLarnon +6 more
TL;DR: The negative relationship between GC activity and Excitability in males provides some support for GC expression as a behavioural syndrome-generating state under the state-dependent framework, and highlights that state-behavioural syndrome associations may not be generalizable within a species and that broader sex differences in state need to be considered.
Journal ArticleDOI
Within- and between-individual (co)variance partitioning reveals limited pleiotropic effects of testosterone on immune function, sexual signaling, and parental investment
TL;DR: The pleiotropic effects of testosterone are questioned, but the applicability and relevance of (co)variance partitioning in behavioral ecological research are exemplified.
Journal ArticleDOI
Mixed support for state maintaining risky personality traits in yellow-bellied marmots
TL;DR: In a variety of taxa, individuals behave in consistently different ways as discussed by the authors, and there are relatively few studies that empirically test the potential mechanisms underlying the causes and maintenance of these personality differences.
References
More filters
Book
Introduction to quantitative genetics
TL;DR: The genetic constitution of a population: Hardy-Weinberg equilibrium and changes in gene frequency: migration mutation, changes of variance, and heritability are studied.
Book
Mixed-Effects Models in S and S-PLUS
TL;DR: Linear Mixed-Effects and Nonlinear Mixed-effects (NLME) models have been studied in the literature as mentioned in this paper, where the structure of grouped data has been used for fitting LME models.
Journal Article
Human biochemical genetics
TL;DR: For the next few weeks the course is going to be exploring a field that’s actually older than classical population genetics, although the approach it’ll be taking to it involves the use of population genetic machinery.
Book
Multilevel analysis : an introduction to basic and advanced multilevel modeling
Tom A. B. Snijders,Roel Bosker +1 more
TL;DR: In this paper, the authors proposed a multilevel regression model to estimate within-and between-group correlations using a combination of within-group correlation and cross-group evidence.
Journal ArticleDOI
Generalized linear mixed models: a practical guide for ecology and evolution
Benjamin M. Bolker,Mollie Elizabeth Brooks,Connie J. Clark,Shane W. Geange,John R. Poulsen,M. Henry H. Stevens,Jada-Simone S. White +6 more
TL;DR: The use (and misuse) of GLMMs in ecology and evolution are reviewed, estimation and inference are discussed, and 'best-practice' data analysis procedures for scientists facing this challenge are summarized.