A distorted wave Born approximation target strength model for Bering Sea euphausiids
Abstract Smith, J. N., Ressler, P. H., and Warren, J. D. 2013. A distorted wave Born approximation target strength model for Bering Sea euphausiids. – ICES Journal of Marine Science, 70:204–214. Acoustic surveys monitor euphausiid populations in the Bering Sea because of their importance as prey for...
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Online Access: | http://dx.doi.org/10.1093/icesjms/fss140 http://academic.oup.com/icesjms/article-pdf/70/1/204/29145110/fss140.pdf |
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croxfordunivpr:10.1093/icesjms/fss140 2024-04-28T08:14:35+00:00 A distorted wave Born approximation target strength model for Bering Sea euphausiids Smith, Joy N. Ressler, Patrick H. Warren, Joseph D. 2012 http://dx.doi.org/10.1093/icesjms/fss140 http://academic.oup.com/icesjms/article-pdf/70/1/204/29145110/fss140.pdf en eng Oxford University Press (OUP) ICES Journal of Marine Science volume 70, issue 1, page 204-214 ISSN 1095-9289 1054-3139 Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2012 croxfordunivpr https://doi.org/10.1093/icesjms/fss140 2024-04-09T07:57:24Z Abstract Smith, J. N., Ressler, P. H., and Warren, J. D. 2013. A distorted wave Born approximation target strength model for Bering Sea euphausiids. – ICES Journal of Marine Science, 70:204–214. Acoustic surveys monitor euphausiid populations in the Bering Sea because of their importance as prey for walleye pollock and other organisms. Various scattering models exist to convert acoustic backscatter data to estimates of euphausiid numerical density or biomass, but a target strength (TS) model specific to Bering Sea euphausiids has not been available. This study parameterized a distorted wave Born approximation (DWBA) scattering model using physical (length and body shape) and material (density contrast, g, and sound speed contrast, h) properties measured from live euphausiids. All model parameters (length, shape, material properties, orientation) were evaluated for their effect on predicted TS. A polynomial function was used to describe animal shape and produced smaller TS estimates compared to a taper function, as is traditionally used in DWBA scattering models of euphausiids. Animal length was positively correlated with TS, but variations in other parameters (including material properties and orientation) also produced large changes in TS. Large differences in TS between estimates calculated using measured versus literature material property values caused large variations in acoustic estimates of euphausiid numerical densities (animals m−3) which emphasizes the importance of collecting site-specific g and h measurements when possible. Article in Journal/Newspaper Bering Sea Oxford University Press ICES Journal of Marine Science 70 1 204 214 |
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Open Polar |
collection |
Oxford University Press |
op_collection_id |
croxfordunivpr |
language |
English |
topic |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography Smith, Joy N. Ressler, Patrick H. Warren, Joseph D. A distorted wave Born approximation target strength model for Bering Sea euphausiids |
topic_facet |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract Smith, J. N., Ressler, P. H., and Warren, J. D. 2013. A distorted wave Born approximation target strength model for Bering Sea euphausiids. – ICES Journal of Marine Science, 70:204–214. Acoustic surveys monitor euphausiid populations in the Bering Sea because of their importance as prey for walleye pollock and other organisms. Various scattering models exist to convert acoustic backscatter data to estimates of euphausiid numerical density or biomass, but a target strength (TS) model specific to Bering Sea euphausiids has not been available. This study parameterized a distorted wave Born approximation (DWBA) scattering model using physical (length and body shape) and material (density contrast, g, and sound speed contrast, h) properties measured from live euphausiids. All model parameters (length, shape, material properties, orientation) were evaluated for their effect on predicted TS. A polynomial function was used to describe animal shape and produced smaller TS estimates compared to a taper function, as is traditionally used in DWBA scattering models of euphausiids. Animal length was positively correlated with TS, but variations in other parameters (including material properties and orientation) also produced large changes in TS. Large differences in TS between estimates calculated using measured versus literature material property values caused large variations in acoustic estimates of euphausiid numerical densities (animals m−3) which emphasizes the importance of collecting site-specific g and h measurements when possible. |
format |
Article in Journal/Newspaper |
author |
Smith, Joy N. Ressler, Patrick H. Warren, Joseph D. |
author_facet |
Smith, Joy N. Ressler, Patrick H. Warren, Joseph D. |
author_sort |
Smith, Joy N. |
title |
A distorted wave Born approximation target strength model for Bering Sea euphausiids |
title_short |
A distorted wave Born approximation target strength model for Bering Sea euphausiids |
title_full |
A distorted wave Born approximation target strength model for Bering Sea euphausiids |
title_fullStr |
A distorted wave Born approximation target strength model for Bering Sea euphausiids |
title_full_unstemmed |
A distorted wave Born approximation target strength model for Bering Sea euphausiids |
title_sort |
distorted wave born approximation target strength model for bering sea euphausiids |
publisher |
Oxford University Press (OUP) |
publishDate |
2012 |
url |
http://dx.doi.org/10.1093/icesjms/fss140 http://academic.oup.com/icesjms/article-pdf/70/1/204/29145110/fss140.pdf |
genre |
Bering Sea |
genre_facet |
Bering Sea |
op_source |
ICES Journal of Marine Science volume 70, issue 1, page 204-214 ISSN 1095-9289 1054-3139 |
op_doi |
https://doi.org/10.1093/icesjms/fss140 |
container_title |
ICES Journal of Marine Science |
container_volume |
70 |
container_issue |
1 |
container_start_page |
204 |
op_container_end_page |
214 |
_version_ |
1797580586354737152 |