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dc.contributor.authorShaffer, Jessica Ward
dc.contributor.authorMoretti, David
dc.contributor.authorJarvis, Susan
dc.contributor.authorTyack, Peter
dc.contributor.authorJohnson, Mark
dc.identifier.citationShaffer , J W , Moretti , D , Jarvis , S , Tyack , P & Johnson , M 2013 , ' Effective beam pattern of the Blainville's beaked whale (Mesoplodon densirostris) and implications for passive acoustic monitoring ' , Journal of the Acoustical Society of America , vol. 133 , no. 3 , pp. 1770-1784 .
dc.identifier.otherPURE: 110630053
dc.identifier.otherPURE UUID: 3ec5a0ed-0ef7-4cd5-b218-9d81b06c9d49
dc.identifier.otherWOS: 000316300900067
dc.identifier.otherScopus: 84874887266
dc.identifier.otherORCID: /0000-0002-8409-4790/work/60887938
dc.descriptionThis work was funded by two partners under the National Oceanographic Partnership Program: the Ocean Acoustics Program of the U.S. National Marine Fisheries Service, Office of Protected Resources, and the International Association of Oil and Gas Producers Joint Industry Programme on Exploration and Production Sound and Marine Life. Research permits were issued to John Boreman (US NMFS 1121-1900), Peter Tyack (US NMFS 981-1578), and Ian Boyd (Bahamas permit #02/07). M.J. and P.T. are supported by the Marine Alliance for Science and Technology Scotland.en
dc.description.abstractThe presence of beaked whales in mass-strandings coincident with navy maneuvers has prompted the development of methods to detect these cryptic animals. Blainville's beaked whales, Mesoplodon densirostris, produce distinctive echolocation clicks during long foraging dives making passive acoustic detection a possibility. However, performance of passive acoustic monitoring depends upon the source level, beam pattern, and clicking behavior of the whales. In this study, clicks recorded from Digital acoustic Tags (DTags) attached to four M. densirostris were linked to simultaneous recordings from an 82-hydrophone bottom-mounted array to derive the source level and beam pattern of the clicks, as steps towards estimating their detectability. The mean estimated on-axis apparent source level for the four whales was 201 dB(rms97). The mean 3 dB beamwidth and directivity index, estimated from sequences of clicks directed towards the far-field hydrophones, were 13 degrees and 23 dB, respectively. While searching for prey, Blainville's beaked whales scan their heads horizontally at a mean rate of 3.6 degrees/s over an angular range of some +/-10 degrees. Thus, while the DI indicates a narrow beam, the area of ensonification over a complete foraging dive is large given the combined effects of body and head movements associated with foraging. []
dc.relation.ispartofJournal of the Acoustical Society of Americaen
dc.rightsCopyright 2013. Acoustical Society of America. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the Acoustical Society of America. The following article appeared as Effective beam pattern of the Blainville's beaked whale (Mesoplodon densirostris) and implications for passive acoustic monitoring Shaffer, J. W., Moretti, D., Jarvis, S., Tyack, P. & Johnson, M. Mar 2013 In : Journal of the Acoustical Society of America. 133, 3, p. 1770-1784 and may be found at
dc.subjectEcholocation signalsen
dc.subjectQH301 Biologyen
dc.titleEffective beam pattern of the Blainville's beaked whale (Mesoplodon densirostris) and implications for passive acoustic monitoringen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Biologyen
dc.contributor.institutionUniversity of St Andrews. Marine Alliance for Science & Technology Scotlanden
dc.contributor.institutionUniversity of St Andrews. Sea Mammal Research Uniten
dc.contributor.institutionUniversity of St Andrews. Sound Tags Groupen
dc.contributor.institutionUniversity of St Andrews. Bioacoustics groupen
dc.contributor.institutionUniversity of St Andrews. Scottish Oceans Instituteen
dc.description.statusPeer revieweden

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