Field energetics and lung function in wild bottlenose dolphins, Tursiops truncatus, in Sarasota Bay Florida

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Date
2018-01-17Author
Fahlman, Andreas
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Brodsky, Micah
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Wells, Randall S.
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McHugh, Katherine
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Allen, Jason
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Barleycorn, Aaron
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Sweeney, Jay C.
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Fauquier, Deborah A.
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Moore, Michael J.
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https://hdl.handle.net/1912/9554As published
https://doi.org/10.1098/rsos.171280DOI
10.1098/rsos.171280Keyword
Field metabolic rate; Pulmonary function test; Tidal volume; Diving physiology; Marine mammals; SpirometryAbstract
We measured respiratory flow rates, and expired O2
in 32 (2–34 years, body mass [Mb] range: 73–291 kg) common
bottlenose dolphins (Tursiops truncatus) during voluntary
breaths on land or in water (between 2014 and 2017). The
data were used to measure the resting O2 consumption rate
(V˙O2, range: 0.76–9.45ml O2min−1 kg−1) and tidal volume
(VT, range: 2.2–10.4 l) during rest. For adult dolphins, the
resting VT, but not V˙O2, correlated with body mass (Mb,
range: 141–291 kg) with an allometric mass-exponent of 0.41.
These data suggest that the mass-specific VT of larger dolphins
decreases considerably more than that of terrestrial mammals
(mass-exponent: 1.03). The average resting sV˙O2 was similar
to previously published metabolic measurements from the
same species. Our data indicate that the resting metabolic
rate for a 150 kg dolphin would be 3.9 ml O2 min−1 kg−1, and
the metabolic rate for active animals, assuming a multiplier
of 3–6, would range from 11.7 to 23.4 ml O2 min−1 kg−1.
Description
© The Author(s), 2018. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Royal Society Open Science 5 (2018): 171280, doi:10.1098/rsos.171280.
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