Cited by 304Distributed Control Multi-Agent SystemsEvacuation and Crowd DynamicsModular Robots and Swarm Intelligence

Inherent noise can facilitate coherence in collective swarm motion

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Yates, Christian A., Erban, Radek, Escudero, Carlos, Couzin, Iain D., Buhl, Camille, Kevrekidis, Ioannis G., Maini, Philip K., Sumpter, David J. T.·2009·Proceedings of the National Academy of Sciences

Abstract

Among the most striking aspects of the movement of many animal groups are their sudden coherent changes in direction. Recent observations of locusts and starlings have shown that this directional switching is an intrinsic property of their motion. Similar direction switches are seen in self-propelled particle and other models of group motion. Comprehending the factors that determine such switches is key to understanding the movement of these groups. Here, we adopt a coarse-grained approach to the study of directional switching in a self-propelled particle model assuming an underlying one-dimensional Fokker–Planck equation for the mean velocity of the particles. We continue with this assumption in analyzing experimental data on locusts and use a similar systematic Fokker–Planck equation coefficient estimation approach to extract the relevant information for the assumed Fokker–Planck equation underlying that experimental data. In the experiment itself the motion of groups of 5 to 100 locust nymphs was investigated in a homogeneous laboratory environment, helping us to establish the intrinsic dynamics of locust marching bands. We determine the mean time between direction switches as a function of group density for the experimental data and the self-propelled particle model. This systematic approach allows us to identify key differences between the experimental data and the model, revealing that individual locusts appear to increase the randomness of their movements in response to a loss of alignment by the group. We give a quantitative description of how locusts use noise to maintain swarm alignment. We discuss further how properties of individual animal behavior, inferred by using the Fokker–Planck equation coefficient estimation approach, can be implemented in the self-propelled particle model to replicate qualitatively the group level dynamics seen in the experimental data.

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  1. [6]Partridge BL. The 3D structure of fish schools. Behav Ecol Sociobiol. 1980;6(4):277–288. [Google Scholar]

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Authors
Yates, C. A., Erban, R., Escudero, C., Couzin, I. D., Buhl, C., Kevrekidis, I. G., Maini, P. K., & Sumpter, D. J. T.
Affiliations
  • Centre for Mathematical Biology and
  • Consejo Superior de Investigaciones Científicas (ES)
  • Princeton University (US)
  • The University of Sydney (AU)
  • University of Oxford (GB)
  • Uppsala University (SE)
Venue
Proceedings of the National Academy of Sciences
Published
2009-04-07
Volume
106
Issue
14
Pages
5464-5469
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2055256257
Cited by
304
References
27
Citations by year
2026: 6 · 2025: 13 · 2024: 15 · 2023: 12 · 2022: 19 · 2021: 13 · 2020: 15 · 2019: 17 · 2018: 20 · 2017: 21 · 2016: 16 · 2015: 23 · 2014: 28 · 2013: 19 · 2012: 28
FWCI
29.02
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Oxford University Research Archive (ORA) (University of Oxford) (acceptedVersion)
  • DIGITAL.CSIC (Spanish National Research Council (CSIC)) (submittedVersion)
  • MPG.PuRe (Max Planck Society) (submittedVersion)
  • King Abdullah University of Science and Technology Repository (King Abdullah University of Science and Technology) (submittedVersion)
Funders
  • Princeton University
  • King Abdullah University of Science and Technology (KUK‐C1‐013‐04)
  • Directorate for Biological Sciences
  • Engineering and Physical Sciences Research Council
  • Biotechnology and Biological Sciences Research Council
  • Air Force Office of Scientific Research
Topics
  • Physical Sciences › Computer Science › Computer Networks and Communications › Distributed Control Multi-Agent Systems
  • Physical Sciences › Engineering › Ocean Engineering › Evacuation and Crowd Dynamics
  • Physical Sciences › Engineering › Mechanical Engineering › Modular Robots and Swarm Intelligence
Keywords
collective motion, locusts, Sturnidae, directional switching, self-propelled particle model, Fokker-Planck equation, noise, group density, marching bands, animal collective behavior
MeSH terms
Animals, Computer Simulation, Flight, Animal, Grasshoppers, Models, Biological, Movement, Noise, Starlings

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