Behavioral Ecology and Sociobiology

, Volume 62, Issue 2, pp 289–298

Emergence of increased division of labor as a function of group size

  • Raphaël Jeanson
  • Jennifer H. Fewell
  • Root Gorelick
  • Susan M. Bertram
Original Paper

Abstract

Empirical evidence suggests that division of labor in insect societies is positively related to group size both within and across taxa. Response threshold models (RTM) have been commonly used to analyze patterns of division of labor. However, these models have been explored empirically and theoretically for only a limited number of tasks, and few studies have examined predictions of the model as colony size and work availability change. We theoretically examine how group size influences division of labor using a fixed response-threshold model. We simultaneously explore how expected by-products of increased colony size, including demand (total work need relative to total work force available) and task number, affect this relationship. Our results indicate that both low demand and high task number positively influence division of labor. We suggest that these changes parallel what is observed within social groups as their size increases, and that, in part, the commonly observed increased division of labor with increasing group size is emergent.

Keywords

Colony size Division of labor Tasks number Threshold model 

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Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • Raphaël Jeanson
    • 1
  • Jennifer H. Fewell
    • 2
  • Root Gorelick
    • 3
  • Susan M. Bertram
    • 3
  1. 1.Centre de Recherches sur la Cognition Animale, CNRS UMR 5169Université Paul SabatierToulouseFrance
  2. 2.School of Life SciencesArizona State UniversityTempeUSA
  3. 3.Department of BiologyCarleton UniversityOttawaCanada

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