A general swimming response in exhausted obligate swimming fish

Iosilevskii, G., Kong, J.D., Meyer, C.G., Watanabe, Y.Y., Papastamatiou, Y.P., Royer, M.A., Nakamura, I., Sato, K., Doyle, T.K., Harman, L., Houghton, J.D.R., Barnett, A., Semmens, J.M., Maoileidigh, N.O., Drumm, A., O'Neill, R., Coffey, D.M., and Payne, N.L. (2022) A general swimming response in exhausted obligate swimming fish. Royal Society Open Science, 9. 211869.

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Marine organisms normally swim at elevated speeds relative to cruising speeds only during strenuous activity, such as predation or escape. We measured swimming speeds of 29 ram ventilating sharks from 10 species and of three Atlantic bluefin tunas immediately after exhaustive exercise (fighting a capture by hook-and-line) and unexpectedly found all individuals exhibited a uniform mechanical response, with swimming speed initially two times higher than the cruising speeds reached approximately 6 h later. We hypothesized that elevated swimming behaviour is a means to increase energetic demand and drive the removal of lactate accumulated during capture via oxidation. To explore this hypothesis, we estimated the mechanical work that must have been spent by an animal to elevate its swim speed and then showed that the amount of lactate that could have been oxidized to fuel it comprises a significant portion of the amount of lactate normally observed in fishes after exhaustive exercise. An estimate for the full energetic cost of the catch-and-release event ensued.

Item ID: 76285
Item Type: Article (Research - C1)
ISSN: 2054-5703
Keywords: biologging, elasmobranch, energetics
Copyright Information: © 2022 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.
Date Deposited: 12 Oct 2022 08:17
FoR Codes: 31 BIOLOGICAL SCIENCES > 3103 Ecology > 310305 Marine and estuarine ecology (incl. marine ichthyology) @ 100%
SEO Codes: 18 ENVIRONMENTAL MANAGEMENT > 1805 Marine systems and management > 180504 Marine biodiversity @ 50%
28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280102 Expanding knowledge in the biological sciences @ 50%
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