Collective Motion due to Individual Escape and Pursuit Response

Pawel Romanczuk, Iain D. Couzin, and Lutz Schimansky-Geier
Phys. Rev. Lett. 102, 010602 – Published 8 January 2009

Abstract

Recent studies suggest that noncooperative behavior such as cannibalism may be a driving mechanism of collective motion. Motivated by these novel results we introduce a simple model of Brownian particles interacting by biologically motivated pursuit and escape interactions. We show the onset of collective motion for both interaction types and analyze their impact on the global dynamics. We demonstrate a strong dependence of experimentally accessible macroscopic observables on the relative strength of escape and pursuit and determine the scaling of the migration speed with model parameters.

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  • Received 2 September 2008

DOI:https://doi.org/10.1103/PhysRevLett.102.010602

©2009 American Physical Society

Authors & Affiliations

Pawel Romanczuk1, Iain D. Couzin2, and Lutz Schimansky-Geier1,*

  • 1Department of Physics, Humboldt University Berlin, Newtonstrasse 15, 12489 Berlin, Germany
  • 2Department of Ecology and Evolutionary Biology, Princeton University, Princeton, New Jersey 08543, USA

  • *romanczuk@physik.hu-berlin.de

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Vol. 102, Iss. 1 — 9 January 2009

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