Methods for the effective study of collective behavior in a radial arm maze

Document Type

Article

Publication Date

8-1-2018

Abstract

Collective behaviors are observed throughout nature, from bacterial colonies to human societies. Important theoretical breakthroughs have recently been made in understanding why animals produce group behaviors and how they coordinate their activities, build collective structures, and make decisions. However, standardized experimental methods to test these findings have been lacking. Notably, easily and unambiguously determining the membership of a group and the responses of an individual within that group is still a challenge. The radial arm maze is presented here as a new standardized method to investigate collective exploration and decision-making in animal groups. This paradigm gives individuals within animal groups the opportunity to make choices among a set of discrete alternatives, and these choices can easily be tracked over long periods of time. We demonstrate the usefulness of this paradigm by performing a set of refuge-site selection experiments with groups of fish. Using an open-source, robust custom image-processing algorithm, we automatically counted the number of animals in each arm of the maze to identify the majority choice. We also propose a new index to quantify the degree of group cohesion in this context. The radial arm maze paradigm provides an easy way to categorize and quantify the choices made by animals. It makes it possible to readily apply the traditional uses of the radial arm maze with single animals to the study of animal groups. Moreover, it opens up the possibility of studying questions specifically related to collective behaviors.

Identifier

85042210171 (Scopus)

Publication Title

Behavior Research Methods

External Full Text Location

https://doi.org/10.3758/s13428-018-1024-9

e-ISSN

15543528

ISSN

1554351X

PubMed ID

29464590

First Page

1673

Last Page

1685

Issue

4

Volume

50

Grant

2.4617.08F

Fund Ref

Fonds De La Recherche Scientifique - FNRS

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