Speed-cohesion trade-offs in collective decision making in ants and the concept of precision in animal behaviour

Détails

ID Serval
serval:BIB_E95C3CBF1304
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Speed-cohesion trade-offs in collective decision making in ants and the concept of precision in animal behaviour
Périodique
Animal Behaviour
Auteur(s)
Franks N.R., Richardson T.O, Stroeymeyt N., Kirby R.W., Amos W.M.D., Hogan P.M., Marshall J.A.R.
ISSN
0003-3472
Statut éditorial
Publié
Date de publication
2013
Volume
85
Numéro
6
Pages
1233-1244
Langue
anglais
Résumé
In decision making, speed-accuracy trade-offs are well known and often inevitable because accuracy depends on being well informed and gathering information takes time. However, trade-offs between speed and cohesion, that is the degree to which a group remains together as a single entity, as a result of their decision making, have been comparatively neglected. We combine theory and experimentation to show that in decision-making systems, speed-cohesion trade-offs are a natural complement to speed-accuracy trade-offs and are therefore of general importance. We then analyse the decision performance of 32 rock ant, Temnothorax albipennis, colonies in experiments in which accuracy of collective decision making was held constant, but time urgency varied. These experiments reveal for the first time an adaptive speed-cohesion trade-off in collective decision making and how this is achieved. In accord with different time constraints, colonies can decide quickly, at the cost of social unity, or they can decide slowly with much greater cohesion. We discuss the similarity between cohesion and the term precision as used in statistics and engineering. This emphasizes the generality of speed versus cohesion/precision trade-offs in decision making and decision implementation in other fields within animal behaviour such as sexually selected motor displays and even certain aspects of birdsong. We also suggest that speed versus precision trade-offs may occur when individuals within a group need to synchronize their activity, and in collective navigation, cooperative hunting and in certain escape behaviours.
Mots-clé
ant, cohesion, precision, speed versus accuracy, Temnothorax albipennis, trade-off
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Création de la notice
03/04/2014 9:34
Dernière modification de la notice
20/08/2019 16:11
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