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dc.contributor.authorZimmer, Walter M. X.
dc.contributor.authorJohnson, Mark P.
dc.contributor.authorMadsen, Peter T.
dc.contributor.authorTyack, Peter L.
dc.date.accessioned2008-08-27T15:41:53Z
dc.date.available2008-08-27T15:41:53Z
dc.date.issued2005-06
dc.identifier.citationJournal of the Acoustical Society of America 117 (2005): 3919-3927en
dc.identifier.urihttp://hdl.handle.net/1912/2358
dc.descriptionAuthor 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.abstractStrandings 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.sponsorshipTag 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.mimetypeapplication/pdf
dc.language.isoen_USen
dc.publisherAcoustical Society of Americaen
dc.relation.urihttps://doi.org/10.1121/1.1910225
dc.subjectBioacousticsen
dc.subjectMechanoceptionen
dc.titleEcholocation clicks of free-ranging Cuvier's beaked whales (Ziphius cavirostris)en
dc.typeArticleen
dc.identifier.doi10.1121/1.1910225


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