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Assortative interactions revealed by sorting of animal groups
Stockholm University, Faculty of Science, Department of Zoology. Stockholm Univ, Zool Dept, Stockholm, Sweden.
Stockholm University, Faculty of Science, Department of Zoology. University of Bristol, U.K..
Stockholm University, Faculty of Science, Department of Zoology.
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Number of Authors: 102018 (English)In: Animal Behaviour, ISSN 0003-3472, E-ISSN 1095-8282, Vol. 142, p. 165-179Article in journal (Refereed) Published
Abstract [en]

Animals living in groups can show substantial variation in social traits and this affects their social organization. However, as the specific mechanisms driving this organization are difficult to identify in already organized groups typically found in the wild, the contribution of interindividual variation to group level behaviour remains enigmatic. Here, we present results of an experiment to create and compare groups that vary in social organization, and study how individual behaviour varies between these groups. We iteratively sorted individuals between groups of guppies, Poecilia reticulata, by ranking the groups according to their directional alignment and then mixing similar groups. Over the rounds of sorting the consistency of the group rankings increased, producing groups that varied significantly in key social behaviours such as collective activity and group cohesion. The repeatability of the underlying individual behaviour was then estimated by comparing the experimental data to simulations. At the level of basic locomotion, individuals in more coordinated groups displayed stronger interactions with the centre of the group, and weaker interactions with their nearest neighbours. We propose that this provides the basis for a passive phenotypic assortment mechanism that may explain the structures of social networks in the wild.

Place, publisher, year, edition, pages
2018. Vol. 142, p. 165-179
Keywords [en]
collective behaviour, repeatability, sociability
National Category
Psychology Zoology
Identifiers
URN: urn:nbn:se:su:diva-160155DOI: 10.1016/j.anbehav.2018.06.005ISI: 000441515500019OAI: oai:DiVA.org:su-160155DiVA, id: diva2:1248829
Available from: 2018-09-17 Created: 2018-09-17 Last updated: 2018-09-17Bibliographically approved

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Kotrschal, AlexanderHerbert-Read, James E.Buechel, Severine D.Romenskyy, Maksymvan der Bijl, WouterKolm, Niclas
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CiteExportLink to record
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