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dc.contributor.authorArranz Alonso, P.
dc.contributor.authorDeRuiter, S. L.
dc.contributor.authorStimpert, A. K.
dc.contributor.authorNeves, Silvana
dc.contributor.authorFriedlaender, A. S.
dc.contributor.authorGoldbogen, J. A.
dc.contributor.authorVisser, F.
dc.contributor.authorCalambokidis, J.
dc.contributor.authorSouthall, B. L.
dc.contributor.authorTyack, P. L.
dc.identifier.citationArranz Alonso , P , DeRuiter , S L , Stimpert , A K , Neves , S , Friedlaender , A S , Goldbogen , J A , Visser , F , Calambokidis , J , Southall , B L & Tyack , P L 2016 , ' Discrimination of fast click series produced by tagged Risso’s dolphins ( Grampus griseus) for echolocation or communication ' , Journal of Experimental Biology , vol. 219 , no. 18 , pp. 2898-2907 .
dc.identifier.otherPURE: 244399115
dc.identifier.otherPURE UUID: 96b81b19-5ef9-4178-b643-f3a0fbaf6ed4
dc.identifier.otherPubMed: 27401759
dc.identifier.otherScopus: 84988692308
dc.identifier.otherWOS: 000384250600022
dc.identifier.otherORCID: /0000-0002-8409-4790/work/60887895
dc.descriptionThis work was supported by the US Navy through several grants and contracts including grants and contracts from the Office of the Chief of Naval Operations, Environmental Readiness Program, U.S. Navy, Living Marine Resources Program, and the U.S. Office of Naval Research Marine Mammal Program (to both the SOCAL-BRS and MOCHA (Multi-study ocean acoustics human effects analysis) projects). Additional support was provided by the MASTS pooling initiative (Marine Alliance for Science and Technology for Scotland; supported by the Scottish Funding Council (grant reference HR09011) and contributing institutions).en
dc.description.abstractEarly studies that categorized odontocete pulsed sounds had few means of discriminating signals used for biosonar-based foraging from those used for communication. This capability to identify the function of sounds is important for understanding and interpreting behavior; it is also essential for monitoring and mitigating potential disturbance from human activities. Archival tags were placed on free-ranging Grampus griseus to quantify and discriminate between pulsed sounds used for echolocation-based foraging and those used for communication. Two types of rapid click-series pulsed sounds, buzzes and burst pulses, were identified as produced by the tagged dolphins and classified using a Gaussian mixture model based on their duration, association with jerk (i.e., rapid change of acceleration), and temporal association with click trains. Buzzes followed regular echolocation clicks and coincided with a strong jerk signal from accelerometers on the tag. They consisted of series averaging 359 ± 210 (mean ± SD) clicks with an increasing repetition rate and relatively low amplitude. Burst pulses consisted of relatively short click series averaging 45 ± 54 clicks with decreasing repetition rate and longer inter-click interval that were less likely to be associated with regular echolocation and the jerk signal. These results suggest that the longer, relatively lower amplitude, jerk-associated buzzes are used in this species to capture prey, mostly during the bottom phase of foraging dives, as seen in other odontocetes. In contrast, the shorter, isolated burst pulses that are generally emitted by the dolphins while at or near the surface are used outside of a direct, known foraging context.
dc.relation.ispartofJournal of Experimental Biologyen
dc.rights© 2016, the Author(s). This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at /
dc.subjectPulsed sounden
dc.subjectBurst pulseen
dc.subjectForaging behavioren
dc.subjectQH301 Biologyen
dc.titleDiscrimination of fast click series produced by tagged Risso’s dolphins (Grampus griseus) for echolocation or communicationen
dc.typeJournal articleen
dc.contributor.institutionUniversity of St Andrews.School of Biologyen
dc.contributor.institutionUniversity of St Andrews.Sea Mammal Research Uniten
dc.contributor.institutionUniversity of St Andrews.Centre for Research into Ecological & Environmental Modellingen
dc.contributor.institutionUniversity of St Andrews.Centre for Social Learning & Cognitive Evolutionen
dc.contributor.institutionUniversity of St Andrews.Marine Alliance for Science & Technology Scotlanden
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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