Fish optimize sensing and respiration during undulatory swimming

O. Akanyeti, P. J. M. Thornycroft, G. V. Lauder, Y. R. Yanagitsuru, A. N. Peterson and J. C. Liao ()
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O. Akanyeti: Whitney Laboratory for Marine Bioscience, University of Florida
P. J. M. Thornycroft: Harvard University
G. V. Lauder: Harvard University
Y. R. Yanagitsuru: Whitney Laboratory for Marine Bioscience, University of Florida
A. N. Peterson: Whitney Laboratory for Marine Bioscience, University of Florida
J. C. Liao: Whitney Laboratory for Marine Bioscience, University of Florida

Nature Communications, 2016, vol. 7, issue 1, 1-8

Abstract: Abstract Previous work in fishes considers undulation as a means of propulsion without addressing how it may affect other functions such as sensing and respiration. Here we show that undulation can optimize propulsion, flow sensing and respiration concurrently without any apparent tradeoffs when head movements are coupled correctly with the movements of the body. This finding challenges a long-held assumption that head movements are simply an unintended consequence of undulation, existing only because of the recoil of an oscillating tail. We use a combination of theoretical, biological and physical experiments to reveal the hydrodynamic mechanisms underlying this concerted optimization. Based on our results we develop a parsimonious control architecture that can be used by both undulatory animals and machines in dynamic environments.

Date: 2016
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DOI: 10.1038/ncomms11044

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