Toothed whales depend on echolocation for orientation and prey localization, and source parameters of echolocation clicks from free-ranging animals therefore convey valuable information about the acoustic physiology and behavioral ecology of the recorded species. Recordings of wild hourglass (Lagenorhynchus cruciger) and Hector’s dolphins (Cephalorhynchus hectori) were made in the Drake Passage (between Tierra del Fuego and the Antarctic Peninsular) and Banks Peninsular (Akaroa Harbour, New Zealand) with a four element hydrophone array. Analysis of source parameters shows that both species produce narrow band high-frequency (NBHF) echolocation clicks. Coastal Hector’s dolphins produce clicks with a mean peak frequency of 129 kHz, 3 dB bandwidth of 20 kHz, , 10 dB duration, and mean apparent source level (ASL) of 177 dB re . The oceanic hourglass dolphins produce clicks with mean peak frequency of 126 kHz, 3 dB bandwidth of 8 kHz, , 10 dB duration, and a mean estimated ASL of 197 dB re . Thus, hourglass dolphins apparently produce clicks of higher source level, which should allow them to detect prey at more than twice the distance compared to Hector’s dolphins. The observed source parameter differences within these two NBHF species may be an adaptation to a coastal cluttered environment versus a deep water, pelagic habitat.
REFERENCES
1.
Au
, W. W. L.
, Moore
, P. W. B.
, and Pawlowski
, D.
(1986
). “Transmission beam pattern of Atlantic bottlenose dolphin
,” J. Acoust. Soc. Am.
80
, 688
–691
.2.
Au
, W. W. L.
(1993
). The Sonar of Dolphins
(Springer-Verlag
, New York
).3.
Au
, W. W. L.
, Kastelein
, R. A.
, Rippe
, T.
, and Schooneman
, N. M.
(1999
). “Transmission beam pattern and echolocation signals of a harbor porpoise (Phocoena phocoena)
,” J. Acoust. Soc. Am.
106
, 3699
–3745
.4.
Au
, W. W. L.
, Kastelein
, R. A.
, and Benoit-Bird
, K. J.
(2007
). “Modeling the detection range of fish by echolocating bottlenose dolphins and harbor porpoises
,” J. Acoust. Soc. Am.
121
, 3954
–3962
.5.
Au
, W. W. L.
, and Benoit-Bird
, K. J.
(2008
). “Broadband backscatter from individual Hawaiian mesopelagic boundary community animals with implications for spinner dolphin foraging
,” J. Acoust. Soc. Am.
123
, 2884
–2894
.6.
Akamatsu
, T.
, Wang
, D.
, Nakamura
, K.
, and Wang
, K.
(1998
). “Echolocation range of captive and free-ranging baiji (Lipotes vexillifer), finless porpoise (Neophocaena phocaenoides), and bottlenose dolphin (Tursiops truncatus)
,” J. Acoust. Soc. Am.
104
, 2511
–2516
.7.
Beedholm
, K.
(2008
). “Harbor porpoise clicks do not have conditionally minimum time bandwidth product
,” J. Acoust. Soc. Am.
124
, EL15
–EL20
.8.
Bräger
, S.
, Dawson
, S. M.
, Slooten
, E.
, Smith
, S.
, Stone
, G. S.
, and Yoshinaga
, A.
(2002
). “Site fidelity and along-shore range in Hector’s dolphin, an endangered marine dolphin from New Zealand
,” Biol. Conserv.
108
, 281
–287
.12.
Dawson
, S. M.
(1988
). “The high frequency sounds of free-ranging Hector’s dolphins, Cephalorhynchus hectori
,” Rep. Int. Whal. Comm.
9
, 339
–344
.13.
Dawson
, S. M.
, and Thorpe
, C. W.
(1990
). “A quantitative analysis of the sounds of Hector’s dolphin
,” Ethology
86
, 131
–145
.14.
Dawson
, S. M.
(1991
). “Clicks and communication: The behavioural and social contexts of Hector’s dolphins communication
,” Ethology
88
, 265
–276
.15.
Fisher
, F. H.
, and Simmons
, V. P.
(1977
). “Sound absorption in sea water
,” J. Acoust. Soc. Am.
62
, 558
–564
.16.
Godall
, R. N. P.
, Baker
, A. N.
, Best
, P. B.
, Meyer
, M.
, and Miyazaki
, N.
(1997
). “On the biology of the hourglass dolphin Lagenorhynchus cruciger
,” Rep. Int. Whal. Comm.
47
, 985
–999
.17.
Johnson
, C. S.
(1967
). in Marine Bioacoustics II
, edited by W. N.
Tavolga
(Pergamon
, Oxford
), pp. 247
–260
.18.
Johnson
, M.
, Hickmott
, L. S.
, Aguilar Soto
, N.
, and Madsen
, P. T.
(2007
). “Echolocation behaviour adapted to prey in foraging Blainville’s beaked whale (Mesoplodon densirostris)
,” Proc. R. Soc. London, Ser. B
275
, 133
–139
.19.
Kastelein
, R. A.
, Au
, W. W. L.
, Rippe
, T.
, and Schooneman
, N. M.
(1999
). “Target detection by an echolocating harbor porpoise (Phocoena phocoena)
,” J. Acoust. Soc. Am.
105
, 2493
–2498
.20.
Li
, S.
, Wang
, K.
, and Wang
, D.
(2005
). “Origin of the double-and multi-pulse structure of echolocation signals in Yangtze finless porpoise (Neophocaena phocaenoides asiaeorientialis)
,” J. Acoust. Soc. Am.
118
, 3934
–3940
.21.
Li
, S.
, Wang
, D.
, Wang
, K.
, Akamatsu
, T.
, Ma
, Z.
, and Han
, J.
(2007
). “Echolocation click sounds from wild inshore finless porpoise (Neophocaena phocaenoides sunameri) with comparisons to the sonar of riverine N. p. asiaeorientalis
,” J. Acoust. Soc. Am.
121
, 3938
–3946
.27.
Madsen
, P. T.
(2005
). “Marine mammals and noise: Problems with root mean square sound pressure levels for transients
,” J. Acoust. Soc. Am.
117
, 3952
–3957
.28.
Madsen
, P. T.
, and Wahlberg
, M.
(2007
). “Recording and quantification of ultrasonic echolocation clicks from free-ranging toothed whales
,” Deep-Sea Res., Part I
54
, 1421
–1444
.24.
Madsen
, P. T.
, Kerr
, I.
, and Payne
, R.
(2004a
). “Source parameter estimates of echolocation clicks from wild pygmy killer whales (Feresa attenuata) (L)
,” J. Acoust. Soc. Am.
116
, 1909
–1912
.25.
Madsen
, P. T.
, Kerr
, I.
, and Payne
, R.
(2004b
). “Echolocation clicks of two free-ranging, oceanic delphinids with different food preferences: False killer whales Pseudorca crassidens and Risso’s dolphins Grampus griseus
,” J. Exp. Biol.
207
, 1811
–1823
.23.
Madsen
, P. T.
, Wahlberg
, M.
, and Møhl
, B.
(2002
). “Male sperm whale (Physeter macrocephalus) acoustics in a high-latitude habitat: Implications for echolocation and communication
,” Behav. Ecol. Sociobiol.
53
, 31
–41
.26.
Madsen
, P. T.
, Carder
, D. A.
, Beedholm
, K.
, and Ridgway
, S. H.
(2005
). “Porpoise clicks from a sperm whales nose—Convergent evolution of 130 kHz pulses in toothed whale sonars?
,” Bioacoustics
15
, 195
–206
.29.
May-Collado
, L.
, and Agnarsson
, I.
(2006
). “Cytochrome and Bayesian inference of whale phylogeny
,” Mol. Phylogenet. Evol.
38
, 344
–354
.30.
Morisaka
, T.
, and Connor
, R. C.
(2007
). “Predation by killer whales (Orcinus orca) and the evolution of whistle loss and narrow-band high frequency clicks in odontocetes
,” J. Evol. Biol.
20
, 1439
–1458
.31.
Møhl
, B.
, and Andersen
, S.
(1973
). “Echolocation: High-frequency component in the click of the harbour porpoise (Phocoena ph. L.)
,” J. Acoust. Soc. Am.
54
, 1368
–1372
.32.
Møhl
, B.
, Wahlberg
, M.
, Madsen
, P. T.
, Miller
, L. A.
, and Surlykke
, A.
(2000
). “Sperm whale clicks: Directionality and source level revisited
,” J. Acoust. Soc. Am.
107
, 638
–648
.33.
Møhl
, B.
, Wahlberg
, M.
, Madsen
, P. T.
, Heerfordt
, A.
, and Lund
, A.
(2003
). “The monopulsed nature of sperm whale clicks
,” J. Acoust. Soc. Am.
114
, 1143
–1154
.34.
Neuweiler
, G.
, and Fenton
, M. B.
(1988
). “Behaviour and foraging ecology of echolocating bats
,” in Animal Sonar: Processes and Performance
, edited by P. E.
Nachtigall
and P. W. B.
Moore
(Plenum
, New York
), pp. 535
–549
.36.
Reeves
, R. R.
, Stewart
, B. S.
, Clapham
, P. J.
, and Powell
, J. A.
(2002
). Guide to Marine Mammals of the World
(Alfred E. Knopf, Inc., Chanticleer Press
, New York
).37.
Slooten
, E.
, and Dawson
, S. M.
(1988
). “Studies on hector’s dolphin, Cephalorhynchus hectori: A progress report
,” Rep. Int. Whal. Comm.
9
, 315
–324
.38.
Slooten
, E.
, Dawson
, S. M.
, and Whitehead
, H.
(1993
). “Associations among photographically identified Hector’s dolphins
,” Can. J. Zool.
71
, 2311
–2318
.39.
Szymanski
, M. D.
, Bain
, D. E.
, and Kiehl
, K.
(1999
). “Killer whale (Orcinus orca) hearing: Auditory brainstem response and behavioral audiograms
,” J. Acoust. Soc. Am.
106
, 1134
–1141
.40.
Rasmussen
, M. H.
, Miller
, L. A.
, and Au
, W. W. L.
(2002
). “Source levels of clicks from free-ranging white beaked dolphins (Lagenorhynchus albirostris Gray 1846) recorded in Icelandic waters
,” J. Acoust. Soc. Am.
111
, 1122
–1125
.41.
Thorpe
, C. W.
, and Dawson
, S. M.
(1991
). “Automatic measurement of descriptive features of Hector’s dolphin vocalizations
,” J. Acoust. Soc. Am.
89
, 435
–443
.42.
Thorpe
, C. W.
, Bates
, R. H. T.
, and Dawson
, S. M.
(1991
). “Intrinsic echolocation capability of Hector’s dolphin, Cephalorhynchus hectori
,” J. Acoust. Soc. Am.
90
, 2931
–2934
.43.
45.
Villadsgaard
, A.
, Wahlberg
, M.
, and Tougaard
, J.
(2007
). “Echolocation signals of wild harbour porpoises, Phocoena phocoena
,” J. Exp. Biol.
210
, 56
–64
.46.
Wahlberg
, M.
, Møhl
, B.
, and Madsen
, P. T.
(2001
). “Estimating source position accuracy of a larger-aperture hydrophone array for bioacoustics
,” J. Acoust. Soc. Am.
109
, 397
–406
.47.
Wiersma
, H.
(1988
). in Animal Sonar
, edited by P. E.
Nachtigall
and P. W. B.
Moore
(Plenum
, New York
), pp. 129
–145
.48.
Wood
, F. G.
, Jr., and Evans
, W. E.
(1980
). in Animal Sonar Systems
, edited by R. G.
Bushnell
and J. F.
Fish
(Plenum
, New York
), pp. 381
–426
.© 2009 Acoustical Society of America.
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