Echolocation clicks of free-ranging Cuvier's beaked whales (Ziphius cavirostris)


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dc.contributor.author Zimmer, Walter M. X.
dc.contributor.author Johnson, Mark P.
dc.contributor.author Madsen, Peter T.
dc.contributor.author Tyack, Peter L.
dc.date.accessioned 2008-08-27T15:41:53Z
dc.date.available 2008-08-27T15:41:53Z
dc.date.issued 2005-06
dc.identifier.citation Journal of the Acoustical Society of America 117 (2005): 3919-3927 en
dc.identifier.uri http://hdl.handle.net/1912/2358
dc.description Author Posting. © Acoustical Society of America, 2005. This article is posted here by permission of Acoustical Society of America for personal use, not for redistribution. The definitive version was published in Journal of the Acoustical Society of America 117 (2005): 3919-3927, doi:10.1121/1.1910225. en
dc.description.abstract Strandings of beaked whales of the genera Ziphius and Mesoplodon have been reported to occur in conjunction with naval sonar use. Detection of the sounds from these elusive whales could reduce the risk of exposure, but descriptions of their vocalizations are at best incomplete. This paper reports quantitative characteristics of clicks from deep-diving Cuvier's beaked whales (Ziphius cavirostris) using a unique data set. Two whales in the Ligurian Sea were simultaneously tagged with sound and orientation recording tags, and the dive tracks were reconstructed allowing for derivation of the range and relative aspect between the clicking whales. At depth, the whales produced trains of regular echolocation clicks with mean interclick intervals of 0.43 s (±0.09) and 0.40 s (±0.07). The clicks are frequency modulated pulses with durations of ~200 µs and center frequencies around 42 kHz, –10 dB bandwidths of 22 kHz, and Q3 dB of 4. The sound beam is narrow with an estimated directionality index of more than 25 dB, source levels up to 214 dBpp re: 1 µPa at 1 m, and energy flux density of 164 dB re: 1 µPa2 s. As the spectral and temporal properties are different from those of nonziphiid odontocetes the potential for passive detection is enhanced. en
dc.description.sponsorship Tag was funded in part by a Cecil H. and Ida M. Green Award and the US Office of Naval Research. WHOI fieldwork and tag development was funded by the National Oceanographic Partnership Program (NOPP), the Strategic Environmental Research and Development Program (SERDP) under Program No. CS-1188, and the Packard Foundation, and was supported by BluWest and the NATO Undersea Research Center. en
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.publisher Acoustical Society of America en
dc.relation.uri http://dx.doi.org/10.1121/1.1910225
dc.subject Bioacoustics en
dc.subject Mechanoception en
dc.title Echolocation clicks of free-ranging Cuvier's beaked whales (Ziphius cavirostris) en
dc.type Article en
dc.identifier.doi 10.1121/1.1910225

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