| Localization and tracking of phonating finless porpoises using towed stereo acoustic data-loggers. | |
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MedLine Citation:
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PMID: 19603904 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Cetaceans produce sound signals frequently. Usually, acoustic localization of cetaceans was made by cable hydrophone arrays and multichannel recording systems. In this study, a simple and relatively inexpensive towed acoustic system consisting of two miniature stereo acoustic data-loggers is described for localization and tracking of finless porpoises in a mobile survey. Among 204 porpoises detected acoustically, 34 individuals (approximately 17%) were localized, and 4 of the 34 localized individuals were tracked. The accuracy of the localization is considered to be fairly high, as the upper bounds of relative distance errors were less than 41% within 173 m. With the location information, source levels of finless porpoise clicks were estimated to range from 180 to 209 dB re 1 microPa pp at 1 m with an average of 197 dB (N=34), which is over 20 dB higher than that estimated previously from animals in enclosed waters. For the four tracked porpoises, two-dimensional swimming trajectories relative to the moving survey boat, absolute swimming speed, and absolute heading direction are deduced by assuming the animal movements are straight and at constant speed in the segment between two consecutive locations. |
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Authors:
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Songhai Li; Tomonari Akamatsu; Ding Wang; Kexiong Wang |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: The Journal of the Acoustical Society of America Volume: 126 ISSN: 1520-8524 ISO Abbreviation: J. Acoust. Soc. Am. Publication Date: 2009 Jul |
Date Detail:
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Created Date: 2009-07-16 Completed Date: 2009-09-28 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: 468-75 Citation Subset: IM |
Affiliation:
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Institute of Hydrobiology, The Chinese Academy of Sciences, Wuhan 430072, People's Republic of China. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acoustics
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instrumentation* Algorithms Animals Animals, Wild Behavior, Animal Echolocation* Electronics / instrumentation*, methods* Porpoises* Swimming |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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