Naturwissenschaften

, Volume 96, Issue 1, pp 57–63 | Cite as

Predation and aggressiveness in host plant protection: a generalization using ants from the genus Azteca

  • Alain Dejean
  • Julien Grangier
  • Céline Leroy
  • Jerôme Orivel
Original Paper

Abstract

In studying the ant genus Azteca, a Neotropical group of arboreal species, we aimed to determine the extent to which the ants use predation and/or aggressiveness to protect their host plants from defoliating insects. We compared a territorially dominant, carton-nester, Azteca chartifex, and three plant-ant species. Azteca alfari and Azteca ovaticeps are associated with the myrmecophyte Cecropia (Cecropiaceae) and their colonies shelter in its hollow branches; whereas Azteca bequaerti is associated with Tococa guianensis (Melastomataceae) and its colonies shelter in leaf pouches situated at the base of the laminas. Whereas A. bequaerti workers react to the vibrations transmitted by the lamina when an alien insect lands on a leaf making it unnecessary for them to patrol their plant, the workers of the three other species rather discover prey by contact. The workers of all four species use a predatory behaviour involving spread-eagling alien insects after recruiting nestmates at short range, and, in some cases, at long range. Because A. alfari and A. ovaticeps discard part of the insects they kill, we deduced that the workers’ predatory behaviour and territorial aggressiveness combine in the biotic defence of their host tree.

Keywords

Aggressiveness Ant–plant relationships Biotic defence Predation 

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Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • Alain Dejean
    • 1
  • Julien Grangier
    • 2
  • Céline Leroy
    • 1
  • Jerôme Orivel
    • 2
  1. 1.Écologie des Forêts de Guyane (UMR-CNRS 8172)Kourou cedexFrance
  2. 2.Laboratoire Evolution et Diversité Biologique, UMR-CNRS 5174Université Toulouse IIIToulouse cedex 9France

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