Diet Overlap and Polyspecific Associations of Red Colobus and Diana Monkeys in the Taï National Park, Ivory Coast

Authors

  • Bettina Wachter,

    1. Institut für Verhaltenswissenschaften, ETH Zürich, Zoologisches Institut, Universität Zürich and Max-Planck-Institut für Verhaltensphysiologie, Seewiesen
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  • Maria Schabel,

    1. Institut für Verhaltenswissenschaften, ETH Zürich, Zoologisches Institut, Universität Zürich and Max-Planck-Institut für Verhaltensphysiologie, Seewiesen
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  • Ronald Noë

    Corresponding author
    1. Institut für Verhaltenswissenschaften, ETH Zürich, Zoologisches Institut, Universität Zürich and Max-Planck-Institut für Verhaltensphysiologie, Seewiesen
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Max-Planck Institut für Verhaltensphysiologie, Seewiesen D-82319 Starnberg, Germany. Email: noe@mpi-seewiesen.mpg.de

Abstract

One possible explanation for the occurrence of the frequent associations between red colobus monkeys and Diana monkeys we observed in Taï National Park, Ivory Coast, is that the two species meet by chance at commonly used food patches. An analysis of the overlap of diets showed, however, that foraging in the same trees could only explain a fraction of the total time in association. Therefore two functional explanations are considered: improvement of foraging efficiency and reduction of mortality due to predation. We did not find any evidence for an improved access to food sources. We conclude that, by default, the predation hypothesis provides the most plausible explanation.

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