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Wind and sky as compass cues in desert ant navigation

Müller, Martin ; Wehner, Rüdiger

In: Naturwissenschaften, 2007, vol. 94, no. 7, p. 589-594

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    Titre
    • Wind and sky as compass cues in desert ant navigation
    Auteur
    • Müller, Martin. Institute of Zoology, University of Zürich, Winterthurerstrasse 190, 8057, Zürich, Switzerland
    • Wehner, Rüdiger. Institute of Zoology, University of Zürich, Winterthurerstrasse 190, 8057, Zürich, Switzerland
    Type de document
    • Postprint
    Identifiant OAI-PMH
    • oai:doc.rero.ch:319337
    Summary
    While integrating their foraging and homing paths, desert ants, Cataglyphis fortis, depend on external compass cues. Whereas recent research in bees and ants has focused nearly exclusively on the polarization compass, two other compass systems—the sun compass and the wind (anemo) compass—as well as the mutual interactions of all these compass systems have received little attention. In this study, we show that of the two visual compass systems, it is only the polarization compass that invariably outcompetes the wind compass, while the sun compass does so only under certain conditions. If the ants are experimentally deprived of their polarization compass system, but have access simultaneously to both their sun compass and their wind compass, they steer intermediate courses. The intermediate courses shift the more towards the wind compass course, the higher the elevation of the sun is in the sky