Professor Peter Teglberg Madsen

Whistling is metabolically cheap for communicating bottlenose dolphins (Tursiops truncatus)

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

Standard

Whistling is metabolically cheap for communicating bottlenose dolphins (Tursiops truncatus). / Pedersen, Michael B.; Fahlman, Andreas; Borque-Espinosa, Alicia; Madsen, Peter T.; Jensen, Frants H.

In: Journal of Experimental Biology, Vol. 223, No. 1, jeb212498, 06.01.2020.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

Harvard

Pedersen, MB, Fahlman, A, Borque-Espinosa, A, Madsen, PT & Jensen, FH 2020, 'Whistling is metabolically cheap for communicating bottlenose dolphins (Tursiops truncatus)', Journal of Experimental Biology, vol. 223, no. 1, jeb212498. https://doi.org/10.1242/jeb.212498

APA

Pedersen, M. B., Fahlman, A., Borque-Espinosa, A., Madsen, P. T., & Jensen, F. H. (2020). Whistling is metabolically cheap for communicating bottlenose dolphins (Tursiops truncatus). Journal of Experimental Biology, 223(1), [jeb212498]. https://doi.org/10.1242/jeb.212498

CBE

Pedersen MB, Fahlman A, Borque-Espinosa A, Madsen PT, Jensen FH. 2020. Whistling is metabolically cheap for communicating bottlenose dolphins (Tursiops truncatus). Journal of Experimental Biology. 223(1):Article jeb212498. https://doi.org/10.1242/jeb.212498

MLA

Vancouver

Pedersen MB, Fahlman A, Borque-Espinosa A, Madsen PT, Jensen FH. Whistling is metabolically cheap for communicating bottlenose dolphins (Tursiops truncatus). Journal of Experimental Biology. 2020 Jan 6;223(1). jeb212498. https://doi.org/10.1242/jeb.212498

Author

Pedersen, Michael B. ; Fahlman, Andreas ; Borque-Espinosa, Alicia ; Madsen, Peter T. ; Jensen, Frants H. / Whistling is metabolically cheap for communicating bottlenose dolphins (Tursiops truncatus). In: Journal of Experimental Biology. 2020 ; Vol. 223, No. 1.

Bibtex

@article{454156aa116f4b54a3ed9f6278a55f84,
title = "Whistling is metabolically cheap for communicating bottlenose dolphins (Tursiops truncatus)",
abstract = "Toothed whales depend on sound for communication and foraging, making them potentially vulnerable to acoustic masking from increasing anthropogenic noise. Masking effects may be ameliorated by higher amplitudes or rates of calling, but such acoustic compensation mechanisms may incur energetic costs if sound production is expensive. The costs of whistling in bottlenose dolphins (Tursiops truncatus) have been reported to be much higher (20% of resting metabolic rate, RMR) than theoretical predictions (0.5–1% of RMR). Here, we address this dichotomy by measuring the change in the resting O2 consumption rate (V O2), a proxy for RMR, in three post-absorptive bottlenose dolphins during whistling and silent trials, concurrent with simultaneous measurement of acoustic output using a calibrated hydrophone array. The experimental protocol consisted of a 2-min baseline period to establish RMR, followed by a 2-min voluntary resting surface apnea, with or without whistling as cued by the trainers, and then a 5-min resting period to measure recovery costs. Daily fluctuations in V O2 were accounted for by subtracting the baseline RMR from the recovery costs to estimate the cost of apnea with and without whistles relative to RMR. Analysis of 52 sessions containing 1162 whistles showed that whistling did not increase metabolic cost (P>0.1, +4.2±6.9%) as compared with control trials (−0.5±5.9%; means±s.e.m.). Thus, we reject the hypothesis that whistling is costly for bottlenose dolphins, and conclude that vocal adjustments such as the Lombard response to noise do not represent large direct energetic costs for communicating toothed whales.",
keywords = "Acoustic communication, Respiratory physiology, Sound production, Toothed whales, Underwater noise, Vocal modifications",
author = "Pedersen, {Michael B.} and Andreas Fahlman and Alicia Borque-Espinosa and Madsen, {Peter T.} and Jensen, {Frants H.}",
year = "2020",
month = jan,
day = "6",
doi = "10.1242/jeb.212498",
language = "English",
volume = "223",
journal = "BRITISH JOURNAL OF EXPERIMENTAL BIOLOGY",
issn = "0022-0949",
publisher = "The/Company of Biologists Ltd.",
number = "1",

}

RIS

TY - JOUR

T1 - Whistling is metabolically cheap for communicating bottlenose dolphins (Tursiops truncatus)

AU - Pedersen, Michael B.

AU - Fahlman, Andreas

AU - Borque-Espinosa, Alicia

AU - Madsen, Peter T.

AU - Jensen, Frants H.

PY - 2020/1/6

Y1 - 2020/1/6

N2 - Toothed whales depend on sound for communication and foraging, making them potentially vulnerable to acoustic masking from increasing anthropogenic noise. Masking effects may be ameliorated by higher amplitudes or rates of calling, but such acoustic compensation mechanisms may incur energetic costs if sound production is expensive. The costs of whistling in bottlenose dolphins (Tursiops truncatus) have been reported to be much higher (20% of resting metabolic rate, RMR) than theoretical predictions (0.5–1% of RMR). Here, we address this dichotomy by measuring the change in the resting O2 consumption rate (V O2), a proxy for RMR, in three post-absorptive bottlenose dolphins during whistling and silent trials, concurrent with simultaneous measurement of acoustic output using a calibrated hydrophone array. The experimental protocol consisted of a 2-min baseline period to establish RMR, followed by a 2-min voluntary resting surface apnea, with or without whistling as cued by the trainers, and then a 5-min resting period to measure recovery costs. Daily fluctuations in V O2 were accounted for by subtracting the baseline RMR from the recovery costs to estimate the cost of apnea with and without whistles relative to RMR. Analysis of 52 sessions containing 1162 whistles showed that whistling did not increase metabolic cost (P>0.1, +4.2±6.9%) as compared with control trials (−0.5±5.9%; means±s.e.m.). Thus, we reject the hypothesis that whistling is costly for bottlenose dolphins, and conclude that vocal adjustments such as the Lombard response to noise do not represent large direct energetic costs for communicating toothed whales.

AB - Toothed whales depend on sound for communication and foraging, making them potentially vulnerable to acoustic masking from increasing anthropogenic noise. Masking effects may be ameliorated by higher amplitudes or rates of calling, but such acoustic compensation mechanisms may incur energetic costs if sound production is expensive. The costs of whistling in bottlenose dolphins (Tursiops truncatus) have been reported to be much higher (20% of resting metabolic rate, RMR) than theoretical predictions (0.5–1% of RMR). Here, we address this dichotomy by measuring the change in the resting O2 consumption rate (V O2), a proxy for RMR, in three post-absorptive bottlenose dolphins during whistling and silent trials, concurrent with simultaneous measurement of acoustic output using a calibrated hydrophone array. The experimental protocol consisted of a 2-min baseline period to establish RMR, followed by a 2-min voluntary resting surface apnea, with or without whistling as cued by the trainers, and then a 5-min resting period to measure recovery costs. Daily fluctuations in V O2 were accounted for by subtracting the baseline RMR from the recovery costs to estimate the cost of apnea with and without whistles relative to RMR. Analysis of 52 sessions containing 1162 whistles showed that whistling did not increase metabolic cost (P>0.1, +4.2±6.9%) as compared with control trials (−0.5±5.9%; means±s.e.m.). Thus, we reject the hypothesis that whistling is costly for bottlenose dolphins, and conclude that vocal adjustments such as the Lombard response to noise do not represent large direct energetic costs for communicating toothed whales.

KW - Acoustic communication

KW - Respiratory physiology

KW - Sound production

KW - Toothed whales

KW - Underwater noise

KW - Vocal modifications

UR - http://www.scopus.com/inward/record.url?scp=85077093484&partnerID=8YFLogxK

U2 - 10.1242/jeb.212498

DO - 10.1242/jeb.212498

M3 - Journal article

C2 - 31796610

AN - SCOPUS:85077093484

VL - 223

JO - BRITISH JOURNAL OF EXPERIMENTAL BIOLOGY

JF - BRITISH JOURNAL OF EXPERIMENTAL BIOLOGY

SN - 0022-0949

IS - 1

M1 - jeb212498

ER -