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Motion cues tune social influence in shoaling fish

Social interactions have important consequences for individual fitness. Collective actions, however, are notoriously context-dependent and identifying how animals rapidly weigh the actions of others despite environmental uncertainty remains a fundamental challenge in biology. By exposing zebrafish (...

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Autores principales: Lemasson, Bertrand, Tanner, Colby, Woodley, Christa, Threadgill, Tammy, Qarqish, Shea, Smith, David
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6023868/
https://www.ncbi.nlm.nih.gov/pubmed/29955069
http://dx.doi.org/10.1038/s41598-018-27807-1
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author Lemasson, Bertrand
Tanner, Colby
Woodley, Christa
Threadgill, Tammy
Qarqish, Shea
Smith, David
author_facet Lemasson, Bertrand
Tanner, Colby
Woodley, Christa
Threadgill, Tammy
Qarqish, Shea
Smith, David
author_sort Lemasson, Bertrand
collection PubMed
description Social interactions have important consequences for individual fitness. Collective actions, however, are notoriously context-dependent and identifying how animals rapidly weigh the actions of others despite environmental uncertainty remains a fundamental challenge in biology. By exposing zebrafish (Danio rerio) to virtual fish silhouettes in a maze we isolated how the relative strength of a visual feature guides individual directional decisions and, subsequently, tunes social influence. We varied the relative speed and coherency with which a portion of silhouettes adopted a direction (leader/distractor ratio) and established that solitary zebrafish display a robust optomotor response to follow leader silhouettes that moved much faster than their distractors, regardless of stimulus coherency. Although recruitment time decreased as a power law of zebrafish group size, individual decision times retained a speed-accuracy trade-off, suggesting a benefit to smaller group sizes in collective decision-making. Directional accuracy improved regardless of group size in the presence of the faster moving leader silhouettes, but without these stimuli zebrafish directional decisions followed a democratic majority rule. Our results show that a large difference in movement speeds can guide directional decisions within groups, thereby providing individuals with a rapid and adaptive means of evaluating social information in the face of uncertainty.
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spelling pubmed-60238682018-07-06 Motion cues tune social influence in shoaling fish Lemasson, Bertrand Tanner, Colby Woodley, Christa Threadgill, Tammy Qarqish, Shea Smith, David Sci Rep Article Social interactions have important consequences for individual fitness. Collective actions, however, are notoriously context-dependent and identifying how animals rapidly weigh the actions of others despite environmental uncertainty remains a fundamental challenge in biology. By exposing zebrafish (Danio rerio) to virtual fish silhouettes in a maze we isolated how the relative strength of a visual feature guides individual directional decisions and, subsequently, tunes social influence. We varied the relative speed and coherency with which a portion of silhouettes adopted a direction (leader/distractor ratio) and established that solitary zebrafish display a robust optomotor response to follow leader silhouettes that moved much faster than their distractors, regardless of stimulus coherency. Although recruitment time decreased as a power law of zebrafish group size, individual decision times retained a speed-accuracy trade-off, suggesting a benefit to smaller group sizes in collective decision-making. Directional accuracy improved regardless of group size in the presence of the faster moving leader silhouettes, but without these stimuli zebrafish directional decisions followed a democratic majority rule. Our results show that a large difference in movement speeds can guide directional decisions within groups, thereby providing individuals with a rapid and adaptive means of evaluating social information in the face of uncertainty. Nature Publishing Group UK 2018-06-28 /pmc/articles/PMC6023868/ /pubmed/29955069 http://dx.doi.org/10.1038/s41598-018-27807-1 Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Lemasson, Bertrand
Tanner, Colby
Woodley, Christa
Threadgill, Tammy
Qarqish, Shea
Smith, David
Motion cues tune social influence in shoaling fish
title Motion cues tune social influence in shoaling fish
title_full Motion cues tune social influence in shoaling fish
title_fullStr Motion cues tune social influence in shoaling fish
title_full_unstemmed Motion cues tune social influence in shoaling fish
title_short Motion cues tune social influence in shoaling fish
title_sort motion cues tune social influence in shoaling fish
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6023868/
https://www.ncbi.nlm.nih.gov/pubmed/29955069
http://dx.doi.org/10.1038/s41598-018-27807-1
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