Transmission loss patterns from acoustic harassment and deterrent devices do not always follow geometrical spreading predictions
Acoustic harassment and deterrent devices have become increasingly popular mitigation tools for negotiating the impacts of marine mammals on fisheries. The rationale for their variable effectiveness remains unexplained, but high variability in the surrounding acoustic field may be relevant. In the p...
Published in: | Marine Mammal Science |
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Main Authors: | , , , , , , , , |
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Language: | English |
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2009
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Online Access: | https://research-portal.st-andrews.ac.uk/en/researchoutput/transmission-loss-patterns-from-acoustic-harassment-and-deterrent-devices-do-not-always-follow-geometrical-spreading-predictions(cdd48178-c629-46d5-a02a-8165e03e2976).html https://doi.org/10.1111/j.1748-7692.2008.00243.x |
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ftunstandrewcris:oai:research-portal.st-andrews.ac.uk:publications/cdd48178-c629-46d5-a02a-8165e03e2976 2024-06-23T07:56:12+00:00 Transmission loss patterns from acoustic harassment and deterrent devices do not always follow geometrical spreading predictions Shapiro, Ari D. Tougaard, Jakob Jorgensen, Poul Boel Kyhn, Line A. Balle, Jeppe Dalgaard Bernardez, Cristina Fjalling, Arne Karlsen, Junita Wahlberg, Magnus 2009-01 https://research-portal.st-andrews.ac.uk/en/researchoutput/transmission-loss-patterns-from-acoustic-harassment-and-deterrent-devices-do-not-always-follow-geometrical-spreading-predictions(cdd48178-c629-46d5-a02a-8165e03e2976).html https://doi.org/10.1111/j.1748-7692.2008.00243.x eng eng https://research-portal.st-andrews.ac.uk/en/researchoutput/transmission-loss-patterns-from-acoustic-harassment-and-deterrent-devices-do-not-always-follow-geometrical-spreading-predictions(cdd48178-c629-46d5-a02a-8165e03e2976).html info:eu-repo/semantics/restrictedAccess Shapiro , A D , Tougaard , J , Jorgensen , P B , Kyhn , L A , Balle , J D , Bernardez , C , Fjalling , A , Karlsen , J & Wahlberg , M 2009 , ' Transmission loss patterns from acoustic harassment and deterrent devices do not always follow geometrical spreading predictions ' , Marine Mammal Science , vol. 25 , no. 1 , pp. 53-67 . https://doi.org/10.1111/j.1748-7692.2008.00243.x acoustic harassment device (AHD) acoustic deterrent device (ADD) non-geometrical acoustic spreading sound exposure level multipath interference marine mammal-fisheries interactions bycatch TEMPORARY THRESHOLD SHIFT WHALES PHYSETER-MACROCEPHALUS PORPOISES PHOCOENA-PHOCOENA BOTTLE-NOSED DOLPHINS TURSIOPS-TRUNCATUS BRITISH-COLUMBIA FISHING NETS HARBOR SEALS UNDERWATER SOUND article 2009 ftunstandrewcris https://doi.org/10.1111/j.1748-7692.2008.00243.x 2024-06-13T00:51:34Z Acoustic harassment and deterrent devices have become increasingly popular mitigation tools for negotiating the impacts of marine mammals on fisheries. The rationale for their variable effectiveness remains unexplained, but high variability in the surrounding acoustic field may be relevant. In the present study, the sound fields of one acoustic harassment device and three acoustic deterrent devices were measured at three study sites along the Scandinavian coast. Superimposed onto an overall trend of decreasing sound exposure levels with increasing range were large local variations in the sound level for all sources in each of the environments. This variability was likely caused by source directionality, inter-ping source level variation and multipath interference. Rapid and unpredictable variations in the sound level as a function of range deviated from expectations derived from spherical and cylindrical spreading models and conflicted with the classic concept of concentric zones of increasing disturbance with decreasing range. Under such conditions, animals may encounter difficulties when trying to determine the direction to and location of a sound source, which may complicate or jeopardize avoidance responses. Article in Journal/Newspaper Phocoena phocoena Physeter macrocephalus University of St Andrews: Research Portal Marine Mammal Science 25 1 53 67 |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
topic |
acoustic harassment device (AHD) acoustic deterrent device (ADD) non-geometrical acoustic spreading sound exposure level multipath interference marine mammal-fisheries interactions bycatch TEMPORARY THRESHOLD SHIFT WHALES PHYSETER-MACROCEPHALUS PORPOISES PHOCOENA-PHOCOENA BOTTLE-NOSED DOLPHINS TURSIOPS-TRUNCATUS BRITISH-COLUMBIA FISHING NETS HARBOR SEALS UNDERWATER SOUND |
spellingShingle |
acoustic harassment device (AHD) acoustic deterrent device (ADD) non-geometrical acoustic spreading sound exposure level multipath interference marine mammal-fisheries interactions bycatch TEMPORARY THRESHOLD SHIFT WHALES PHYSETER-MACROCEPHALUS PORPOISES PHOCOENA-PHOCOENA BOTTLE-NOSED DOLPHINS TURSIOPS-TRUNCATUS BRITISH-COLUMBIA FISHING NETS HARBOR SEALS UNDERWATER SOUND Shapiro, Ari D. Tougaard, Jakob Jorgensen, Poul Boel Kyhn, Line A. Balle, Jeppe Dalgaard Bernardez, Cristina Fjalling, Arne Karlsen, Junita Wahlberg, Magnus Transmission loss patterns from acoustic harassment and deterrent devices do not always follow geometrical spreading predictions |
topic_facet |
acoustic harassment device (AHD) acoustic deterrent device (ADD) non-geometrical acoustic spreading sound exposure level multipath interference marine mammal-fisheries interactions bycatch TEMPORARY THRESHOLD SHIFT WHALES PHYSETER-MACROCEPHALUS PORPOISES PHOCOENA-PHOCOENA BOTTLE-NOSED DOLPHINS TURSIOPS-TRUNCATUS BRITISH-COLUMBIA FISHING NETS HARBOR SEALS UNDERWATER SOUND |
description |
Acoustic harassment and deterrent devices have become increasingly popular mitigation tools for negotiating the impacts of marine mammals on fisheries. The rationale for their variable effectiveness remains unexplained, but high variability in the surrounding acoustic field may be relevant. In the present study, the sound fields of one acoustic harassment device and three acoustic deterrent devices were measured at three study sites along the Scandinavian coast. Superimposed onto an overall trend of decreasing sound exposure levels with increasing range were large local variations in the sound level for all sources in each of the environments. This variability was likely caused by source directionality, inter-ping source level variation and multipath interference. Rapid and unpredictable variations in the sound level as a function of range deviated from expectations derived from spherical and cylindrical spreading models and conflicted with the classic concept of concentric zones of increasing disturbance with decreasing range. Under such conditions, animals may encounter difficulties when trying to determine the direction to and location of a sound source, which may complicate or jeopardize avoidance responses. |
format |
Article in Journal/Newspaper |
author |
Shapiro, Ari D. Tougaard, Jakob Jorgensen, Poul Boel Kyhn, Line A. Balle, Jeppe Dalgaard Bernardez, Cristina Fjalling, Arne Karlsen, Junita Wahlberg, Magnus |
author_facet |
Shapiro, Ari D. Tougaard, Jakob Jorgensen, Poul Boel Kyhn, Line A. Balle, Jeppe Dalgaard Bernardez, Cristina Fjalling, Arne Karlsen, Junita Wahlberg, Magnus |
author_sort |
Shapiro, Ari D. |
title |
Transmission loss patterns from acoustic harassment and deterrent devices do not always follow geometrical spreading predictions |
title_short |
Transmission loss patterns from acoustic harassment and deterrent devices do not always follow geometrical spreading predictions |
title_full |
Transmission loss patterns from acoustic harassment and deterrent devices do not always follow geometrical spreading predictions |
title_fullStr |
Transmission loss patterns from acoustic harassment and deterrent devices do not always follow geometrical spreading predictions |
title_full_unstemmed |
Transmission loss patterns from acoustic harassment and deterrent devices do not always follow geometrical spreading predictions |
title_sort |
transmission loss patterns from acoustic harassment and deterrent devices do not always follow geometrical spreading predictions |
publishDate |
2009 |
url |
https://research-portal.st-andrews.ac.uk/en/researchoutput/transmission-loss-patterns-from-acoustic-harassment-and-deterrent-devices-do-not-always-follow-geometrical-spreading-predictions(cdd48178-c629-46d5-a02a-8165e03e2976).html https://doi.org/10.1111/j.1748-7692.2008.00243.x |
genre |
Phocoena phocoena Physeter macrocephalus |
genre_facet |
Phocoena phocoena Physeter macrocephalus |
op_source |
Shapiro , A D , Tougaard , J , Jorgensen , P B , Kyhn , L A , Balle , J D , Bernardez , C , Fjalling , A , Karlsen , J & Wahlberg , M 2009 , ' Transmission loss patterns from acoustic harassment and deterrent devices do not always follow geometrical spreading predictions ' , Marine Mammal Science , vol. 25 , no. 1 , pp. 53-67 . https://doi.org/10.1111/j.1748-7692.2008.00243.x |
op_relation |
https://research-portal.st-andrews.ac.uk/en/researchoutput/transmission-loss-patterns-from-acoustic-harassment-and-deterrent-devices-do-not-always-follow-geometrical-spreading-predictions(cdd48178-c629-46d5-a02a-8165e03e2976).html |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1111/j.1748-7692.2008.00243.x |
container_title |
Marine Mammal Science |
container_volume |
25 |
container_issue |
1 |
container_start_page |
53 |
op_container_end_page |
67 |
_version_ |
1802649142310207488 |