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Research Article
The choreography of learning walks in the Australian jack jumper ant Myrmecia croslandi
Piyankarie Jayatilaka, Trevor Murray, Ajay Narendra, Jochen Zeil
Journal of Experimental Biology 2018 221: jeb185306 doi: 10.1242/jeb.185306 Published 24 October 2018
Piyankarie Jayatilaka
Research School of Biology, The Australian National University, 46 Sullivans Creek Road, Canberra ACT2601, Australia
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Trevor Murray
Research School of Biology, The Australian National University, 46 Sullivans Creek Road, Canberra ACT2601, Australia
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Ajay Narendra
Research School of Biology, The Australian National University, 46 Sullivans Creek Road, Canberra ACT2601, Australia
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Jochen Zeil
Research School of Biology, The Australian National University, 46 Sullivans Creek Road, Canberra ACT2601, Australia
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ABSTRACT

We provide a detailed analysis of the learning walks performed by Myrmecia croslandi ants at the nest during which they acquire visual information on its location. Most learning walks of 12 individually marked naïve ants took place in the morning with a narrow time window separating the first two learning walks, which most often occurred on the same day. Naïve ants performed between two and seven walks over up to four consecutive days before heading out to forage. On subsequent walks, naïve ants tend to explore the area around the nest in new compass directions. During learning walks, ants move along arcs around the nest while performing oscillating scanning movements. In a regular temporal sequence, the ants' gaze oscillates between the nest direction and the direction pointing away from the nest. Ants thus experience a sequence of views roughly across the nest and away from the nest from systematically spaced vantage points around the nest. Further, we show that ants leaving the nest for a foraging trip often walk in an arc around the nest on the opposite side to the intended foraging direction, performing a scanning routine indistinguishable from that of a learning walk. These partial learning walks are triggered by disturbance around the nest and may help returning ants with reorienting when overshooting the nest, which they frequently do. We discuss what is known about learning walks in different ant species and their adaptive significance for acquiring robust navigational memories.

FOOTNOTES

  • Competing interests

    The authors declare no competing or financial interests.

  • Author contributions

    Conceptualization: P.J., A.N., J.Z.; Methodology: T.M., A.N., J.Z.; Software: T.M., J.Z.; Validation: P.J., J.Z.; Formal analysis: P.J., A.N., J.Z.; Investigation: P.J., T.M., J.Z.; Resources: A.N., J.Z.; Data curation: J.Z.; Writing - original draft: P.J., J.Z.; Writing - review & editing: P.J., T.M., A.N., J.Z.; Visualization: P.J., J.Z.; Supervision: A.N., J.Z.; Project administration: A.N., J.Z.; Funding acquisition: A.N., J.Z.

  • Funding

    We acknowledge financial support from the Australian Research Council (ARC) Centre of Excellence Scheme (CE0561903), an ARC Discovery Early Career Award (DE120100019), an ARC Future Fellowship Award (FT140100221), ARC Discovery Project Grants (DP0986606, DP150101172) and The Hermon Slade Foundation (HSF 10/7).

  • Data availability

    Data are available at FigShare: https://doi.org/10.6084/m9.figshare.6972842.v1. Requests for further information and for original video footage should be directed to and will be fulfilled by the corresponding author.

  • Supplementary information

    Supplementary information available online at http://jeb.biologists.org/lookup/doi/10.1242/jeb.185306.supplemental

  • Received May 24, 2018.
  • Accepted August 12, 2018.
  • © 2018. Published by The Company of Biologists Ltd
http://www.biologists.com/user-licence-1-1/
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Keywords

  • Learning walks
  • Homing
  • Visual navigation
  • Ants
  • Scene memories

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Research Article
The choreography of learning walks in the Australian jack jumper ant Myrmecia croslandi
Piyankarie Jayatilaka, Trevor Murray, Ajay Narendra, Jochen Zeil
Journal of Experimental Biology 2018 221: jeb185306 doi: 10.1242/jeb.185306 Published 24 October 2018
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Research Article
The choreography of learning walks in the Australian jack jumper ant Myrmecia croslandi
Piyankarie Jayatilaka, Trevor Murray, Ajay Narendra, Jochen Zeil
Journal of Experimental Biology 2018 221: jeb185306 doi: 10.1242/jeb.185306 Published 24 October 2018

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