Evaluating the effect of seismic surveys on fish — the efficacy of different exposure metrics to explain disturbance
To assess potential disturbance effects on fish from seismic air-gun surveys, we described several metrics to characterize the exposures from such surveys, including the number of emissions by area and time, and metrics based on accumulated sound exposure levels (SEL). For the SEL-based metrics we u...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Online Access: | http://hdl.handle.net/11250/109179 https://doi.org/10.1139/cjfas-2012-0465 |
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ftimr:oai:imr.brage.unit.no:11250/109179 2023-05-15T18:42:45+02:00 Evaluating the effect of seismic surveys on fish — the efficacy of different exposure metrics to explain disturbance Handegard, Nils Olav Tronstad, Tron Vedul Hovem, Jens Martin 2013-06-05 application/pdf http://hdl.handle.net/11250/109179 https://doi.org/10.1139/cjfas-2012-0465 eng eng NRC Research Press Evaluating the effect of seismic surveys on fish — the efficacy of different exposure metrics to explain disturbance. Nils Olav Handegard, Tron Vedul Tronstad, Jens Martin Hovem. Canadian Journal of Fisheries and Aquatic Sciences, 2013, 70:1271-1277 urn:issn:1205-7533 http://hdl.handle.net/11250/109179 https://doi.org/10.1139/cjfas-2012-0465 1271-1277 70 Canadian Journal of Fisheries and Aquatic Sciences 9 seismics seismikk VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fish health: 923 Journal article Peer reviewed 2013 ftimr https://doi.org/10.1139/cjfas-2012-0465 2021-09-23T20:15:37Z To assess potential disturbance effects on fish from seismic air-gun surveys, we described several metrics to characterize the exposures from such surveys, including the number of emissions by area and time, and metrics based on accumulated sound exposure levels (SEL). For the SEL-based metrics we used both a simple spherical–geometrical model and a model that incorporated physical sound propagation properties such as bottom topography and the vertical difference in sound speed. We applied the metrics to two experiments in Norwegian waters (the Nordkappbanken and Vesterålen experiments) where fish distributions and fisheries were affected by the air-guns, but where the disturbance was stronger in the Nordkappbanken case. The metrics based on the number of emissions by area and time showed a stronger impact in the Nordkappbanken case. For the SEL-based metrics, the simple sound propagation model failed because of artificially elevated levels close to the emissions, but for the more complex propagation model, contrary to expectations, a stronger SEL was found in the Vesterålen case. We conclude that simple sound propagation models should be avoided and that the reliance on sound energy metrics like SEL for disturbance effects must be interpreted with caution. Article in Journal/Newspaper Vesterålen Institute for Marine Research: Brage IMR Vesterålen ENVELOPE(14.939,14.939,68.754,68.754) Canadian Journal of Fisheries and Aquatic Sciences 70 9 1271 1277 |
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Open Polar |
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Institute for Marine Research: Brage IMR |
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ftimr |
language |
English |
topic |
seismics seismikk VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fish health: 923 |
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seismics seismikk VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fish health: 923 Handegard, Nils Olav Tronstad, Tron Vedul Hovem, Jens Martin Evaluating the effect of seismic surveys on fish — the efficacy of different exposure metrics to explain disturbance |
topic_facet |
seismics seismikk VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fish health: 923 |
description |
To assess potential disturbance effects on fish from seismic air-gun surveys, we described several metrics to characterize the exposures from such surveys, including the number of emissions by area and time, and metrics based on accumulated sound exposure levels (SEL). For the SEL-based metrics we used both a simple spherical–geometrical model and a model that incorporated physical sound propagation properties such as bottom topography and the vertical difference in sound speed. We applied the metrics to two experiments in Norwegian waters (the Nordkappbanken and Vesterålen experiments) where fish distributions and fisheries were affected by the air-guns, but where the disturbance was stronger in the Nordkappbanken case. The metrics based on the number of emissions by area and time showed a stronger impact in the Nordkappbanken case. For the SEL-based metrics, the simple sound propagation model failed because of artificially elevated levels close to the emissions, but for the more complex propagation model, contrary to expectations, a stronger SEL was found in the Vesterålen case. We conclude that simple sound propagation models should be avoided and that the reliance on sound energy metrics like SEL for disturbance effects must be interpreted with caution. |
format |
Article in Journal/Newspaper |
author |
Handegard, Nils Olav Tronstad, Tron Vedul Hovem, Jens Martin |
author_facet |
Handegard, Nils Olav Tronstad, Tron Vedul Hovem, Jens Martin |
author_sort |
Handegard, Nils Olav |
title |
Evaluating the effect of seismic surveys on fish — the efficacy of different exposure metrics to explain disturbance |
title_short |
Evaluating the effect of seismic surveys on fish — the efficacy of different exposure metrics to explain disturbance |
title_full |
Evaluating the effect of seismic surveys on fish — the efficacy of different exposure metrics to explain disturbance |
title_fullStr |
Evaluating the effect of seismic surveys on fish — the efficacy of different exposure metrics to explain disturbance |
title_full_unstemmed |
Evaluating the effect of seismic surveys on fish — the efficacy of different exposure metrics to explain disturbance |
title_sort |
evaluating the effect of seismic surveys on fish — the efficacy of different exposure metrics to explain disturbance |
publisher |
NRC Research Press |
publishDate |
2013 |
url |
http://hdl.handle.net/11250/109179 https://doi.org/10.1139/cjfas-2012-0465 |
long_lat |
ENVELOPE(14.939,14.939,68.754,68.754) |
geographic |
Vesterålen |
geographic_facet |
Vesterålen |
genre |
Vesterålen |
genre_facet |
Vesterålen |
op_source |
1271-1277 70 Canadian Journal of Fisheries and Aquatic Sciences 9 |
op_relation |
Evaluating the effect of seismic surveys on fish — the efficacy of different exposure metrics to explain disturbance. Nils Olav Handegard, Tron Vedul Tronstad, Jens Martin Hovem. Canadian Journal of Fisheries and Aquatic Sciences, 2013, 70:1271-1277 urn:issn:1205-7533 http://hdl.handle.net/11250/109179 https://doi.org/10.1139/cjfas-2012-0465 |
op_doi |
https://doi.org/10.1139/cjfas-2012-0465 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
70 |
container_issue |
9 |
container_start_page |
1271 |
op_container_end_page |
1277 |
_version_ |
1766232522415407104 |