Large-Scale Navigation: The Insect Case

  • Authors:
  • Rüdiger Wehner

  • Affiliations:
  • -

  • Venue:
  • COSIT '99 Proceedings of the International Conference on Spatial Information Theory: Cognitive and Computational Foundations of Geographic Information Science
  • Year:
  • 1999

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Abstract

Despite their miniature, 0.1-mg brains Cataglyphis ants of the Sahara desert are particularly impressive navigators. They leave their subterranean burrows for distances of several hundred metres by winding their way in a tortuous search for food, and then return in an amazingly straight line to the starting point of their foraging trip. Their predominant way of navigation is path integration including a compass that is based on skylight (polarization) patterns invisible to man. Path integration is supplemented by landmark guidance for finally pin-pointing the goal. In this context, matching of retinotopically fixed panoramic views ("snapshots") and local vectors accompanying such views are further components of the ant's navigational toolkit. Behavioural and neurobiological analyses reveal that in the insect's cockpit - its brain - a high-level task is accomplished by the collective interaction of a number of low-level modules.