| Comparison of echolocation clicks from geographically sympatric killer whales and long-finned pilot whales (L). | |
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MedLine Citation:
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PMID: 21786872 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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The source characteristics of biosonar signals from sympatric killer whales and long-finned pilot whales in a Norwegian fjord were compared. A total of 137 pilot whale and more than 2000 killer whale echolocation clicks were recorded using a linear four-hydrophone array. Of these, 20 pilot whale clicks and 28 killer whale clicks were categorized as being recorded on-axis. The clicks of pilot whales had a mean apparent source level of 196 dB re 1 μPa pp and those of killer whales 203 dB re 1 μPa pp. The duration of pilot whale clicks was significantly shorter (23 μs, S.E. = 1.3) and the centroid frequency significantly higher (55 kHz, S.E. = 2.1) than killer whale clicks (duration: 41 μs, S.E. = 2.6; centroid frequency: 32 kHz, S.E. = 1.5). The rate of increase in the accumulated energy as a function of time also differed between clicks from the two species. The differences in duration, frequency, and energy distribution may have a potential to allow for the distinction between pilot and killer whale clicks when using automated detection routines for acoustic monitoring. |
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Authors:
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Ida G Eskesen; Magnus Wahlberg; Malene Simon; Ole Næsbye Larsen |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: The Journal of the Acoustical Society of America Volume: 130 ISSN: 1520-8524 ISO Abbreviation: J. Acoust. Soc. Am. Publication Date: 2011 Jul |
Date Detail:
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Created Date: 2011-07-26 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7503051 Medline TA: J Acoust Soc Am Country: United States |
Other Details:
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Languages: eng Pagination: 9 Citation Subset: IM |
Affiliation:
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Institute of Biology, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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