Displacement of Orcinus orca (L.) by high amplitude sound in British
Whale displacement by acoustic ‘‘pollution’ ’ has been difficult to document, even in cases where it is strongly suspected, because noise effects can rarely be separated from other stimuli. Two independent studies on the natural history of killer whales (Orcinus orca) monitored frequency of whale oc...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.180.6481 2023-05-15T17:53:24+02:00 Displacement of Orcinus orca (L.) by high amplitude sound in British Ra B. Morton Helena K. Symonds The Pennsylvania State University CiteSeerX Archives http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.180.6481 http://www.agobservatory.org/library.cfm?refID=70191 en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.180.6481 http://www.agobservatory.org/library.cfm?refID=70191 Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.agobservatory.org/library.cfm?refID=70191 British Columbia long-term change noise Orcinus orca text ftciteseerx 2016-01-07T16:27:42Z Whale displacement by acoustic ‘‘pollution’ ’ has been difficult to document, even in cases where it is strongly suspected, because noise effects can rarely be separated from other stimuli. Two independent studies on the natural history of killer whales (Orcinus orca) monitored frequency of whale occurrence from January 1985 through December 2000 in two adjacent areas: Johnstone Strait and the Broughton Archipelago. Four high-amplitude, acoustic harassment devices (AHDs) were installed throughout 1993 on already existing salmon farms in the Broughton Archipelago, in attempts to deter predation on fish pens by harbour seals (Phoca vitulina Linnaeus). While whale occurrence was relatively stable in both areas until 1993, it then increased slightly in the Johnstone Strait area and declined significantly in the Broughton Archipelago while AHDs were in use. Both mammal-eating and fish-eating killer whales were similarly impacted. Acoustic harassment ended in the Broughton Archipelago in May 1999 and whale occurrence re-established to baseline levels. This study concludes that whale displacement resulted from the deliberate introduction of noise into their environment. Text Orca Orcinus orca Phoca vitulina Unknown |
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British Columbia long-term change noise Orcinus orca |
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British Columbia long-term change noise Orcinus orca Ra B. Morton Helena K. Symonds Displacement of Orcinus orca (L.) by high amplitude sound in British |
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British Columbia long-term change noise Orcinus orca |
description |
Whale displacement by acoustic ‘‘pollution’ ’ has been difficult to document, even in cases where it is strongly suspected, because noise effects can rarely be separated from other stimuli. Two independent studies on the natural history of killer whales (Orcinus orca) monitored frequency of whale occurrence from January 1985 through December 2000 in two adjacent areas: Johnstone Strait and the Broughton Archipelago. Four high-amplitude, acoustic harassment devices (AHDs) were installed throughout 1993 on already existing salmon farms in the Broughton Archipelago, in attempts to deter predation on fish pens by harbour seals (Phoca vitulina Linnaeus). While whale occurrence was relatively stable in both areas until 1993, it then increased slightly in the Johnstone Strait area and declined significantly in the Broughton Archipelago while AHDs were in use. Both mammal-eating and fish-eating killer whales were similarly impacted. Acoustic harassment ended in the Broughton Archipelago in May 1999 and whale occurrence re-established to baseline levels. This study concludes that whale displacement resulted from the deliberate introduction of noise into their environment. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Ra B. Morton Helena K. Symonds |
author_facet |
Ra B. Morton Helena K. Symonds |
author_sort |
Ra B. Morton |
title |
Displacement of Orcinus orca (L.) by high amplitude sound in British |
title_short |
Displacement of Orcinus orca (L.) by high amplitude sound in British |
title_full |
Displacement of Orcinus orca (L.) by high amplitude sound in British |
title_fullStr |
Displacement of Orcinus orca (L.) by high amplitude sound in British |
title_full_unstemmed |
Displacement of Orcinus orca (L.) by high amplitude sound in British |
title_sort |
displacement of orcinus orca (l.) by high amplitude sound in british |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.180.6481 http://www.agobservatory.org/library.cfm?refID=70191 |
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Orca Orcinus orca Phoca vitulina |
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Orca Orcinus orca Phoca vitulina |
op_source |
http://www.agobservatory.org/library.cfm?refID=70191 |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.180.6481 http://www.agobservatory.org/library.cfm?refID=70191 |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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