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Classification of broadband echoes from prey of a foraging Blainville's beaked whale

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dc.contributor.author Jones, Benjamin A.
dc.contributor.author Stanton, Timothy K.
dc.contributor.author Lavery, Andone C.
dc.contributor.author Johnson, Mark P.
dc.contributor.author Madsen, Peter T.
dc.contributor.author Tyack, Peter L.
dc.date.accessioned 2008-08-20T15:05:24Z
dc.date.available 2008-08-20T15:05:24Z
dc.date.issued 2008-03
dc.identifier.citation Journal of the Acoustical Society of America 123 (2008): 1753-1762 en
dc.identifier.uri http://hdl.handle.net/1912/2339
dc.description Author Posting. © Acoustical Society of America, 2008. 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 123 (2008): 1753-1762, doi:10.1121/1.2828210. en
dc.description.abstract Blainville's beaked whales (Mesoplodon densirostris) use broadband, ultrasonic echolocation signals with a −10 dB bandwidth from 26 to 51 kHz to search for, localize, and approach prey that generally consist of mid-water and deep-water fishes and squid. Although it is well known that the spectral characteristics of broadband echoes from marine organisms vary as a function of size, shape, orientation, and anatomical group, there is little evidence as to whether or not free-ranging toothed whales use spectral cues in discriminating between prey and nonprey. In order to study the prey-classification process, a stereo acoustic tag was deployed on a Blainville's beaked whale so that emitted clicks and the corresponding echoes from targets in the water could be recorded. A comparison of echoes from targets apparently selected by the whale and those from a sample of scatterers that were not selected suggests that spectral features of the echoes, target strengths, or both may have been used by the whale to discriminate between echoes. Specifically, the whale appears to favor targets with one or more nulls in the echo spectra and to seek prey with higher target strengths at deeper depths. en
dc.description.sponsorship Field work was supported by the U.S. National Oceanographic Partnership Program, the U.S. Office of Naval Research, and the Canary Islands government. Analysis of the data was supported by the Office of the Oceanographer of the U.S. Navy, The Academic Programs Office at the Woods Hole Oceanographic Institution and the Danish Natural Science Research Council through a Steno scholarship to Peter T. Madsen. 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/10.1121/1.2828210
dc.subject Bioacoustics en
dc.subject Zoology en
dc.title Classification of broadband echoes from prey of a foraging Blainville's beaked whale en
dc.type Article en
dc.identifier.doi 10.1121/1.2828210


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