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Individual-level movement bias leads to the formation of higher-order social structure in a mobile group of baboons

In mobile social groups, influence patterns driving group movement can vary between democratic and despotic. The arrival at any single pattern of influence is thought to be underpinned by both environmental factors and group composition. To identify the specific patterns of influence driving travel...

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Detalles Bibliográficos
Autores principales: Bonnell, Tyler R., Clarke, Parry M., Henzi, S. Peter, Barrett, Louise
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society Publishing 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5541535/
https://www.ncbi.nlm.nih.gov/pubmed/28791140
http://dx.doi.org/10.1098/rsos.170148
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author Bonnell, Tyler R.
Clarke, Parry M.
Henzi, S. Peter
Barrett, Louise
author_facet Bonnell, Tyler R.
Clarke, Parry M.
Henzi, S. Peter
Barrett, Louise
author_sort Bonnell, Tyler R.
collection PubMed
description In mobile social groups, influence patterns driving group movement can vary between democratic and despotic. The arrival at any single pattern of influence is thought to be underpinned by both environmental factors and group composition. To identify the specific patterns of influence driving travel decision-making in a chacma baboon troop, we used spatially explicit data to extract patterns of individual movement bias. We scaled these estimates of individual-level bias to the level of the group by constructing an influence network and assessing its emergent structural properties. Our results indicate that there is heterogeneity in movement bias: individual animals respond consistently to particular group members, and higher-ranking animals are more likely to influence the movement of others. This heterogeneity resulted in a group-level network structure that consisted of a single core and two outer shells. Here, the presence of a core suggests that a set of highly interdependent animals drove routine group movements. These results suggest that heterogeneity at the individual level can lead to group-level influence structures, and that movement patterns in mobile social groups can add to the exploration of both how these structures develop (i.e. mechanistic aspects) and what consequences they have for individual- and group-level outcomes (i.e. functional aspects).
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spelling pubmed-55415352017-08-08 Individual-level movement bias leads to the formation of higher-order social structure in a mobile group of baboons Bonnell, Tyler R. Clarke, Parry M. Henzi, S. Peter Barrett, Louise R Soc Open Sci Biology (Whole Organism) In mobile social groups, influence patterns driving group movement can vary between democratic and despotic. The arrival at any single pattern of influence is thought to be underpinned by both environmental factors and group composition. To identify the specific patterns of influence driving travel decision-making in a chacma baboon troop, we used spatially explicit data to extract patterns of individual movement bias. We scaled these estimates of individual-level bias to the level of the group by constructing an influence network and assessing its emergent structural properties. Our results indicate that there is heterogeneity in movement bias: individual animals respond consistently to particular group members, and higher-ranking animals are more likely to influence the movement of others. This heterogeneity resulted in a group-level network structure that consisted of a single core and two outer shells. Here, the presence of a core suggests that a set of highly interdependent animals drove routine group movements. These results suggest that heterogeneity at the individual level can lead to group-level influence structures, and that movement patterns in mobile social groups can add to the exploration of both how these structures develop (i.e. mechanistic aspects) and what consequences they have for individual- and group-level outcomes (i.e. functional aspects). The Royal Society Publishing 2017-07-12 /pmc/articles/PMC5541535/ /pubmed/28791140 http://dx.doi.org/10.1098/rsos.170148 Text en © 2017 The Authors. http://creativecommons.org/licenses/by/4.0/ Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.
spellingShingle Biology (Whole Organism)
Bonnell, Tyler R.
Clarke, Parry M.
Henzi, S. Peter
Barrett, Louise
Individual-level movement bias leads to the formation of higher-order social structure in a mobile group of baboons
title Individual-level movement bias leads to the formation of higher-order social structure in a mobile group of baboons
title_full Individual-level movement bias leads to the formation of higher-order social structure in a mobile group of baboons
title_fullStr Individual-level movement bias leads to the formation of higher-order social structure in a mobile group of baboons
title_full_unstemmed Individual-level movement bias leads to the formation of higher-order social structure in a mobile group of baboons
title_short Individual-level movement bias leads to the formation of higher-order social structure in a mobile group of baboons
title_sort individual-level movement bias leads to the formation of higher-order social structure in a mobile group of baboons
topic Biology (Whole Organism)
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5541535/
https://www.ncbi.nlm.nih.gov/pubmed/28791140
http://dx.doi.org/10.1098/rsos.170148
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