Vortex phase matching as a strategy for schooling in robots and in fish

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2020
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Nature Communications. Nature Publishing Group. 2020, 11, 5408. eISSN 2041-1723. Available under: doi: 10.1038/s41467-020-19086-0
Zusammenfassung

It has long been proposed that flying and swimming animals could exploit neighbour-induced flows. Despite this it is still not clear whether, and if so how, schooling fish coordinate their movement to benefit from the vortices shed by others. To address this we developed bio-mimetic fish-like robots which allow us to measure directly the energy consumption associated with swimming together in pairs (the most common natural configuration in schooling fish). We find that followers, in any relative position to a near-neighbour, could obtain hydrodynamic benefits if they exhibit a tailbeat phase difference that varies linearly with front-back distance, a strategy we term 'vortex phase matching'. Experiments with pairs of freely-swimming fish reveal that followers exhibit this strategy, and that doing so requires neither a functioning visual nor lateral line system. Our results are consistent with the hypothesis that fish typically, but not exclusively, use vortex phase matching to save energy.

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570 Biowissenschaften, Biologie
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ISO 690LI, Liang, Mate NAGY, Jacob M. GRAVING, Joseph BAK-COLEMAN, Guangming XIE, Iain D. COUZIN, 2020. Vortex phase matching as a strategy for schooling in robots and in fish. In: Nature Communications. Nature Publishing Group. 2020, 11, 5408. eISSN 2041-1723. Available under: doi: 10.1038/s41467-020-19086-0
BibTex
@article{Li2020Vorte-52562,
  year={2020},
  doi={10.1038/s41467-020-19086-0},
  title={Vortex phase matching as a strategy for schooling in robots and in fish},
  volume={11},
  journal={Nature Communications},
  author={Li, Liang and Nagy, Mate and Graving, Jacob M. and Bak-Coleman, Joseph and Xie, Guangming and Couzin, Iain D.},
  note={Article Number: 5408}
}
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