Preliminary evidence for signature vocalizations among free-ranging narwhals (Monodon monoceros)


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dc.contributor.author Shapiro, Ari D.
dc.date.accessioned 2008-08-26T18:14:58Z
dc.date.available 2008-08-26T18:14:58Z
dc.date.issued 2006-09
dc.identifier.citation Journal of the Acoustical Society of America 120 (2006): 1695-1705 en
dc.identifier.uri http://hdl.handle.net/1912/2355
dc.description Author Posting. © Acoustical Society of America, 2006. 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 120 (2006): 1695-1705, doi:10.1121/1.2226586. en
dc.description.abstract Animal signature vocalizations that are distinctive at the individual or group level can facilitate recognition between conspecifics and re-establish contact with an animal that has become separated from its associates. In this study, the vocal behavior of two free-ranging adult male narwhals (Monodon monoceros) in Admiralty Inlet, Baffin Island was recorded using digital archival tags. These recording instruments were deployed when the animals were caught and held onshore to attach satellite tags, a protocol that separated them from their groups. The signature content of two vocal categories was considered: (1) combined tonal/pulsed signals, which contained synchronous pulsatile and tonal content; (2) whistles, or frequency modulated tonal signals with harmonic energy. Nonparametric comparisons of the temporal and spectral features of each vocal class revealed significant differences between the two individuals. A separate, cross-correlation measure conducted on the whistles that accounted for overall contour shape and absolute frequency content confirmed greater interindividual compared to intraindividual differences. These data are consistent with the hypothesis that narwhals produce signature vocalizations that may facilitate their reunion with group members once they become separated, but additional data are required to demonstrate this claim more rigorously. en
dc.description.sponsorship I thank the WHOI Academic Programs office, the National Science Foundation Research Fellowship, and the National Defense Science and Engineering Graduate Fellowship for financial support. This field operation was funded by the Greenland Institute of Natural Resources, the National Environmental Research Institute, Department of Fisheries and Oceans, Nunavut Wildlife Management Board and the Danish Cooperation for the Environment in the Arctic (DANCEA). Additional logistical support was provided by the Polar Continental Shelf Project. 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/10.1121/1.2226586
dc.subject Biocommunications en
dc.subject Bioacoustics en
dc.subject Spectral analysis en
dc.title Preliminary evidence for signature vocalizations among free-ranging narwhals (Monodon monoceros) en
dc.type Article en
dc.identifier.doi 10.1121/1.2226586

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