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Maximal response to a mechanical leader at critical group size in ant collectives

Author

Listed:
  • Atanu Chatterjee

    (Weizmann Institute of Science)

  • Tom Tzook

    (Weizmann Institute of Science)

  • Nir S. Gov

    (Weizmann Institute of Science)

  • Ofer Feinerman

    (Weizmann Institute of Science)

Abstract

It is widely recognized that biological collectives operate near criticality to amplify their capability of collective response. The peak in susceptibility near criticality renders these groups highly responsive to external stimuli. While this phenomenon has been recognized and supported by evidence from theory, a direct experimental demonstration has been elusive. To bridge this gap, here we record the response of a group of Paratrechina longicornis ants to external stimuli as they join efforts to carry food to their nest. Using a robotic system that mimics a transient leader, we apply tactile ant-scale forces and measure the group’s response at sub, near, and supercritical regimes. Supported by theory and simulations, we provide direct experimental evidence to demonstrate that at critical group size, the collective response of the ants to an external force is maximally amplified.

Suggested Citation

  • Atanu Chatterjee & Tom Tzook & Nir S. Gov & Ofer Feinerman, 2025. "Maximal response to a mechanical leader at critical group size in ant collectives," Nature Communications, Nature, vol. 16(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-61158-6
    DOI: 10.1038/s41467-025-61158-6
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    References listed on IDEAS

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    2. Jonathan E Ron & Itai Pinkoviezky & Ehud Fonio & Ofer Feinerman & Nir S Gov, 2018. "Bi-stability in cooperative transport by ants in the presence of obstacles," PLOS Computational Biology, Public Library of Science, vol. 14(5), pages 1-21, May.
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    4. Aviram Gelblum & Itai Pinkoviezky & Ehud Fonio & Abhijit Ghosh & Nir Gov & Ofer Feinerman, 2015. "Ant groups optimally amplify the effect of transiently informed individuals," Nature Communications, Nature, vol. 6(1), pages 1-9, November.
    5. Pascal P Klamser & Pawel Romanczuk, 2021. "Collective predator evasion: Putting the criticality hypothesis to the test," PLOS Computational Biology, Public Library of Science, vol. 17(3), pages 1-21, March.
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