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BP: Fachverband Biologische Physik
BP 1: Statistical Physics in Biological Systems I (joint DY, BP)
BP 1.8: Talk
Monday, March 14, 2011, 12:30–12:45, ZEU 250
Onset of Collective Motion due to Escape and Pursuit — •Pawel Romanczuk1, Vishwesha Guttal2, Lutz Schimansky-Geier1, and Iain D. Couzin2 — 1Department of Physics, Humboldt Universität zu Berlin, Germany — 2Department of Ecology and Evolutionary Biology, Princeton University, USA
Recent studies suggest that noncooperative behavior such as cannibalism may be a driving mechanism of collective motion in mass migrating insects such as desert locusts [1]. We have shown in a biologically motivated model of individuals interacting via escape and pursuit interactions associated with cannibalism the emergence of large scale collective motion [2]. Furthermore we were able to reproduce experimental results and make specific prediction from our modelling approach [3]. Here we focus on a generelized model of self-propelled particles interacting via selective attraction or repulsion to approaching or moving-away individuals. We identify conditions for large scale collective motion in our model and discuss the onset of collective motion as an evolutionary stable strategy (ESS) in the context of mass migration of desert locusts under threat of cannibalism.
[1] S. J. Simpson et. al., Proc. Natl. Acad. Sci. USA, 103, 4152 (2006)
[2] P. Romanczuk et. al., Phys. Rev. Lett., 102, 010602 (2009)
[3] S. Bazazi et. al., Proc. Roy. Soc. B, doi 10.1098/rspb.2010.1447