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Passive acoustic methods for fine-scale tracking of harbour porpoises in tidal rapids

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Macaulay_2017_Passive_JASA_1120.pdf (1.200Mb)
Date
02/2017
Author
MacAulay, Jamie Donald John
Gordon, Jonathan Charles David
Gillespie, Douglas Michael
Malinka, Chloe Elizabeth
Northridge, Simon Patrick
Keywords
GC Oceanography
QH301 Biology
NDAS
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Abstract
The growing interest in generating electrical power from tidal currents using tidal turbine generators raises a number of environmental concerns, including the risk that marine mammals might be injured or killed through collision with rotating turbine blades. To understand this risk, information on how marine mammals use tidal rapid habitats and in particular, their underwater movements and dive behaviour is required. Porpoises, which are the most abundant small cetacean at most European tidal sites, are difficult animals to tag, and the limited size of tidal habitats means that any telemetered animal would be likely to spend only a small proportion of time within them. Here, an alternative approach is explored, whereby passive acoustic monitoring (PAM) is used to obtain fine scale geo-referenced tracks of harbour porpoises in tidal rapid areas. Large aperture hydrophone arrays are required to obtain accurate locations of animals from PAM data and automated algorithms are necessary to process the large quantities of acoustic data collected on such systems during a typical survey. Methods to automate localisation, including a method to match porpoise detections on different hydrophones and separate different vocalising animals, and an assessment of the localisation accuracy of the large aperture hydrophone array are presented.
Citation
MacAulay , J D J , Gordon , J C D , Gillespie , D M , Malinka , C E & Northridge , S P 2017 , ' Passive acoustic methods for fine-scale tracking of harbour porpoises in tidal rapids ' , Journal of the Acoustical Society of America , vol. 141 , no. 2 , pp. 1120-1132 . https://doi.org/10.1121/1.4976077
Publication
Journal of the Acoustical Society of America
Status
Peer reviewed
DOI
https://doi.org/10.1121/1.4976077
ISSN
0001-4966
Type
Journal article
Rights
© 2017, Acoustical Society of America. This work has been made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at asa.scitation.org / http://dx.doi.org/10.1121/1.4976077
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/11549

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