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Journal of Ethology

, Volume 12, Issue 2, pp 175–185 | Cite as

The unusual social organization of the antPachycondyla tridentata (Formicidae, ponerinae)

  • Kathrin Sommer
  • Bert Hölldobler
  • Karla Jessen
Article

Abstract

Colonies of the ponerine antPachycondyla tridentata from Malaysia occur with and without queens. In a total of 7 colonies we found more than 80% of the workers to be mated, irrespective of the presence or absence of queens. This is a hitherto unknown social organisation in ants. Queens and workers competed equally for reproduction. In the colonies investigated several ants were laying eggs. Behavioral observations revealed persistent dominance interactions between colony members. A few ants, but not necessarily a queen, occupied top positions. Removal of the most dominant ants led to a new hierarchy in which subordinate ants with developed ovaries were attacked significantly more frequently than non-reproductive ants. On the average, callows were more aggressive than older subordinate ants, displacing most of the older laying workers in one colony. Nestmate recognition tests revealed that non-reproductive ants were much more aggressive towards foreign ants than were ants with developed ovaries.

Keywords

Social Organisation Animal Ecology Recognition Test Behavioral Observation Unknown Social Organisation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Japan Ethological Society 1994

Authors and Affiliations

  • Kathrin Sommer
    • 1
  • Bert Hölldobler
    • 1
  • Karla Jessen
    • 1
  1. 1.Theodor-Boveri-InstitutLehrstuhl für Verhaltensphysiologie und Soziobiologie der UniversitätWürzburgGermany

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