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Quorum Decision-Making in Foraging Fish Shoals
Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Mathematics, Analysis and Applied Mathematics.
2012 (English)In: PLoS ONE, ISSN 1932-6203, Vol. 7, no 3, e32411- p.Article in journal (Refereed) Published
Abstract [en]

Quorum responses provide a means for group-living animals to integrate and filter disparate social information to produce accurate and coherent group decisions. A quorum response may be defined as a steep increase in the probability of group members performing a given behaviour once a threshold minimum number of their group mates already performing that behaviour is exceeded. In a previous study we reported the use of a quorum response in group decision-making of threespine sticklebacks (Gasterosteus aculeatus) under a simulated predation threat. Here we examine the use of quorum responses by shoals of sticklebacks in first locating and then leaving a foraging patch. We show that a quorum rule explains movement decisions by threespine sticklebacks toward and then away from a food patch. Following both to and from a food patch occurred when a threshold number of initiators was exceeded, with the threshold being determined by the group size.

Place, publisher, year, edition, pages
2012. Vol. 7, no 3, e32411- p.
National Category
Mathematics Biological Sciences
URN: urn:nbn:se:uu:diva-174584DOI: 10.1371/journal.pone.0032411ISI: 000303060800016OAI: diva2:529215
Available from: 2012-05-29 Created: 2012-05-22 Last updated: 2012-05-29Bibliographically approved

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