Collective Decision-Making Based on Individual Discrimination Capability in Pre-social Insects

  • Jean-Marc Amé
  • Jesus Millor
  • José Halloy
  • Grégory Sempo
  • Jean-Louis Deneubourg
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4095)


Gregarious insects, like cockroaches, aggregate in shelters during their resting period. How do individuals reach a collegial decision? What is the relation between the distributions of the individuals and the parameter values characterizing the population and the environment? With a model based on experimental data, we demonstrated that the collegial decision is based on the relation between the individual resting time in a shelter and the population in this shelter. We extended this model to the case where different sub-groups may interact and where the crowding effect under the shelters influences the aggregation. This second model shows that depending on the interaction between the sub-groups and the crowding effect, different patterns are observed such as segregation of the different sub-group or the aggregation of the whole population.


Aggregative State Aggregation Pheromone Symmetrical State Collective Choice German Cockroach 


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Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Jean-Marc Amé
    • 1
  • Jesus Millor
    • 1
  • José Halloy
    • 1
  • Grégory Sempo
    • 1
  • Jean-Louis Deneubourg
    • 1
  1. 1.Service d’Ecologie socialeUniversité Libre de BruxellesBruxellesBelgium

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