Optimal cue integration in ants

Wystrach, Antoine and Mangan, Michael and Webb, Barbara (2015) Optimal cue integration in ants. Proceedings of the Royal Society B: Biological Sciences, 282 (1816). ISSN 0962-8452

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Abstract

In situations with redundant or competing sensory information, humans have been shown to perform cue integration, weighting different cues according to their certainty in a quantifiably optimal manner. Ants have been shown to merge the directional information available from their path integration (PI) and visual memory, but as yet it is not clear that they do so in a way that reflects the relative certainty of the cues. In this study, we manipulate the variance of the PI home vector by allowing ants (Cataglyphis velox) to run different distances and testing their directional choice when the PI vector direction is put in competition with visual memory. Ants show progressively stronger weighting of their PI direction as PI length increases. The weighting is quantitatively predicted by modelling the expected directional variance of home vectors of different lengths and assuming optimal cue integration. However, a subsequent experiment suggests ants may not actually compute an internal estimate of the PI certainty, but are using the PI home vector length as a proxy.

Keywords:Computational biology
Subjects:C Biological Sciences > C100 Biology
Divisions:College of Science > School of Computer Science
ID Code:23589
Deposited On:09 Aug 2016 11:27

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