Journal of Statistical Physics

, Volume 158, Issue 3, pp 628–646

Modeling the Emergence of Modular Leadership Hierarchy During the Collective Motion of Herds Made of Harems

Article

DOI: 10.1007/s10955-014-1131-7

Cite this article as:
Ozogány, K. & Vicsek, T. J Stat Phys (2015) 158: 628. doi:10.1007/s10955-014-1131-7

Abstract

Gregarious animals need to make collective decisions in order to keep their cohesiveness. Several species of them live in multilevel societies, and form herds composed of smaller communities. We present a model for the development of a leadership hierarchy in a herd consisting of loosely connected sub-groups (e.g. harems) by combining self organization and social dynamics. It starts from unfamiliar individuals without relationships and reproduces the emergence of a hierarchical and modular leadership network that promotes an effective spreading of the decisions from more capable individuals to the others, and thus gives rise to a beneficial collective decision. Our results stemming from the model are in a good agreement with our observations of a Przewalski horse herd (Hortobágy, Hungary). We find that the harem-leader to harem-member ratio observed in Przewalski horses corresponds to an optimal network in this approach regarding common success, and that the observed and modeled harem size distributions are close to a lognormal.

Keywords

Collective animal behaviour Leadership hierarchy Multilevel societies Collective decision making Modular hierarchy 

Supplementary material

10955_2014_1131_MOESM1_ESM.mov (34.8 mb)
ESM 1 (MOV 35647 kb)
10955_2014_1131_MOESM2_ESM.mov (8.2 mb)
ESM 2 (MOV 8426 kb)
10955_2014_1131_MOESM3_ESM.pdf (539 kb)
ESM 3 (PDF 593 kb)

Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  1. 1.Department of Biological PhysicsEötvös UniversityBudapestHungary
  2. 2.MTA-ELTE Statistical and Biological Physics Research GroupBudapestHungary