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dc.contributor.authorStimpert, A.K.
dc.contributor.authorDeRuiter, S.L.
dc.contributor.authorSouthall, B.L.
dc.contributor.authorMoretti, D.J.
dc.contributor.authorFalcone, E.A.
dc.contributor.authorGoldbogen, J.A.
dc.contributor.authorFriedlaender, A.
dc.contributor.authorSchorr, G.S.
dc.contributor.authorCalambokidis, J.
dc.date.accessioned2015-02-04T22:50:57Z
dc.date.available2015-02-04T22:50:57Z
dc.date.issued2014
dc.identifier.citationScientific Reports, Volume 4, 7031, doi: 10.1038/srep07031
dc.identifier.urihttp://hdl.handle.net/10945/44452
dc.descriptionThe article of record as published may be found at http://dx.doi.org/10.1038/srep07031en_US
dc.description.abstractBeaked whales are hypothesized to be particularly sensitive to anthropogenic noise, based on previous strandings and limited experimental and observational data. However, few species have been studied in detail. We describe the underwater behavior of a Baird’s beaked whale (Berardius bairdii) from the first deployment of a multi-sensor acoustic tag on this species. The animal exhibited shallow (23 6 15 m max depth), intermediate (324649 m), and deep (11386243 m) dives. Echolocation clicks were produced with a mean inter-click interval of approximately 300 ms and peak frequency of 25 kHz. Two deep dives included presumed foraging behavior, with echolocation pulsed sounds (presumed prey capture attempts) associated with increased maneuvering, and sustained inverted swimming during the bottom phase of the dive. A controlled exposure to simulated mid-frequency active sonar (3.5–4 kHz) was conducted 4 hours after tag deployment, and within 3 minutes of exposure onset, the tagged whale increased swim speed and body movement, and continued to show unusual dive behavior for each of its next three dives, one of each type. These are the first data on the acoustic foraging behavior in this largest beaked whale species, and the first experimental demonstration of a response to simulated sonar.en_US
dc.description.sponsorshipResearch was supported by the US Navy Chief of Naval Operations, Environmental Readiness Program, the Office of Naval Research, the Naval Postgraduate School, and the National Research Council.en_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.en_US
dc.titleAcoustic and foraging behavior of a Baird’s beaked whale, Berardius bairdii, exposed to simulated sonaren_US
dc.typeArticleen_US
dc.contributor.departmentOceanography
dc.subject.authorAnimal behaviouren_US
dc.subject.authorConservation biologyen_US
dc.subject.authorBehavioural ecologyen_US


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