Local vectors in desert ants: context-dependent landmark learning during outbound and homebound runs |
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Authors: | S?Bisch-Knaden Email author" target="_blank">R?WehnerEmail author |
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Institution: | Department of Zoology, University of Zürich, Winterthurerstrasse 190, 8057, Zürich, Switzerland. |
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Abstract: | Desert ants, Cataglyphis fortis, associate nestward-directed vector memories (local vectors) with the sight of landmarks along a familiar route. This view-based navigational strategy works in parallel to the self-centred path integration system. In the present study we ask at what temporal stage during a foraging journey does the ant acquire nestward-directed local vector information from feeder-associated landmarks: during its outbound run to a feeding site or during its homebound run to the nest. Tests performed after two reversed-image training paradigms revealed that the ants associated such vectors exclusively with landmarks present during their homebound runs. |
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