Modelling three-dimensional directivity of sound scattering by Antarctic krill: progress towards biomass estimation using multibeam sonar
<qd> Cutter, G. R., Renfree, J. S., Cox, M. J., Brierley, A. S., and Demer, D. A. 2009. Modelling three-dimensional directivity of sound scattering by Antarctic krill: progress towards biomass estimation using multibeam sonar. – ICES Journal of Marine Science, 66: 000–000. </qd>Target st...
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fthighwire:oai:open-archive.highwire.org:icesjms:fsp040v1 2023-05-15T13:45:45+02:00 Modelling three-dimensional directivity of sound scattering by Antarctic krill: progress towards biomass estimation using multibeam sonar Cutter, George R. Renfree, Josiah S. Cox, Martin J. Brierley, Andrew S. Demer, David A. 2009-03-18 05:32:19.0 text/html http://icesjms.oxfordjournals.org/cgi/content/short/fsp040v1 https://doi.org/10.1093/icesjms/fsp040 en eng Oxford University Press http://icesjms.oxfordjournals.org/cgi/content/short/fsp040v1 http://dx.doi.org/10.1093/icesjms/fsp040 Copyright (C) 2009, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer SEAFACTS TEXT 2009 fthighwire https://doi.org/10.1093/icesjms/fsp040 2013-05-26T22:25:54Z <qd> Cutter, G. R., Renfree, J. S., Cox, M. J., Brierley, A. S., and Demer, D. A. 2009. Modelling three-dimensional directivity of sound scattering by Antarctic krill: progress towards biomass estimation using multibeam sonar. – ICES Journal of Marine Science, 66: 000–000. </qd>Target strength ( TS ) estimation is a principal source of uncertainty in acoustic surveys of Antarctic krill ( Euphausia superba ). Although TS is strongly dependent on krill orientation, there is a paucity of information in this regard. This paper considers the potential for narrow-bandwidth, multibeam-echosounder (MBE) data to be used for estimating the orientations of krill beneath survey vessels. First, software was developed to predict MBE measurements of the directivity patterns of acoustic scattering from individual or aggregated krill in any orientation. Based on the distorted-wave, Born approximation model (DWBA), scattering intensities are predicted vs. MBE angles for specified distributions of krill orientations (pitch, roll, and yaw angles) and swarm densities. Results indicate that certain distributions of orientations, perhaps indicative of particular behaviour, should be apparent from the sonar data. The model results are compared with measurements on krill made using a 200-kHz MBE deployed from a small craft off Cape Shirreff, Livingston Island, Antarctica, in summer 2006. The stochastic DWBA model is then invoked to explain disparities between the model predictions and MBE measurements. Text Antarc* Antarctic Antarctic Krill Antarctica Euphausia superba Livingston Island HighWire Press (Stanford University) Antarctic Cape Shirreff ENVELOPE(-60.800,-60.800,-62.417,-62.417) Livingston Island ENVELOPE(-60.500,-60.500,-62.600,-62.600) Shirreff ENVELOPE(-60.792,-60.792,-62.459,-62.459) ICES Journal of Marine Science 66 6 1245 1251 |
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HighWire Press (Stanford University) |
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English |
topic |
SEAFACTS |
spellingShingle |
SEAFACTS Cutter, George R. Renfree, Josiah S. Cox, Martin J. Brierley, Andrew S. Demer, David A. Modelling three-dimensional directivity of sound scattering by Antarctic krill: progress towards biomass estimation using multibeam sonar |
topic_facet |
SEAFACTS |
description |
<qd> Cutter, G. R., Renfree, J. S., Cox, M. J., Brierley, A. S., and Demer, D. A. 2009. Modelling three-dimensional directivity of sound scattering by Antarctic krill: progress towards biomass estimation using multibeam sonar. – ICES Journal of Marine Science, 66: 000–000. </qd>Target strength ( TS ) estimation is a principal source of uncertainty in acoustic surveys of Antarctic krill ( Euphausia superba ). Although TS is strongly dependent on krill orientation, there is a paucity of information in this regard. This paper considers the potential for narrow-bandwidth, multibeam-echosounder (MBE) data to be used for estimating the orientations of krill beneath survey vessels. First, software was developed to predict MBE measurements of the directivity patterns of acoustic scattering from individual or aggregated krill in any orientation. Based on the distorted-wave, Born approximation model (DWBA), scattering intensities are predicted vs. MBE angles for specified distributions of krill orientations (pitch, roll, and yaw angles) and swarm densities. Results indicate that certain distributions of orientations, perhaps indicative of particular behaviour, should be apparent from the sonar data. The model results are compared with measurements on krill made using a 200-kHz MBE deployed from a small craft off Cape Shirreff, Livingston Island, Antarctica, in summer 2006. The stochastic DWBA model is then invoked to explain disparities between the model predictions and MBE measurements. |
format |
Text |
author |
Cutter, George R. Renfree, Josiah S. Cox, Martin J. Brierley, Andrew S. Demer, David A. |
author_facet |
Cutter, George R. Renfree, Josiah S. Cox, Martin J. Brierley, Andrew S. Demer, David A. |
author_sort |
Cutter, George R. |
title |
Modelling three-dimensional directivity of sound scattering by Antarctic krill: progress towards biomass estimation using multibeam sonar |
title_short |
Modelling three-dimensional directivity of sound scattering by Antarctic krill: progress towards biomass estimation using multibeam sonar |
title_full |
Modelling three-dimensional directivity of sound scattering by Antarctic krill: progress towards biomass estimation using multibeam sonar |
title_fullStr |
Modelling three-dimensional directivity of sound scattering by Antarctic krill: progress towards biomass estimation using multibeam sonar |
title_full_unstemmed |
Modelling three-dimensional directivity of sound scattering by Antarctic krill: progress towards biomass estimation using multibeam sonar |
title_sort |
modelling three-dimensional directivity of sound scattering by antarctic krill: progress towards biomass estimation using multibeam sonar |
publisher |
Oxford University Press |
publishDate |
2009 |
url |
http://icesjms.oxfordjournals.org/cgi/content/short/fsp040v1 https://doi.org/10.1093/icesjms/fsp040 |
long_lat |
ENVELOPE(-60.800,-60.800,-62.417,-62.417) ENVELOPE(-60.500,-60.500,-62.600,-62.600) ENVELOPE(-60.792,-60.792,-62.459,-62.459) |
geographic |
Antarctic Cape Shirreff Livingston Island Shirreff |
geographic_facet |
Antarctic Cape Shirreff Livingston Island Shirreff |
genre |
Antarc* Antarctic Antarctic Krill Antarctica Euphausia superba Livingston Island |
genre_facet |
Antarc* Antarctic Antarctic Krill Antarctica Euphausia superba Livingston Island |
op_relation |
http://icesjms.oxfordjournals.org/cgi/content/short/fsp040v1 http://dx.doi.org/10.1093/icesjms/fsp040 |
op_rights |
Copyright (C) 2009, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer |
op_doi |
https://doi.org/10.1093/icesjms/fsp040 |
container_title |
ICES Journal of Marine Science |
container_volume |
66 |
container_issue |
6 |
container_start_page |
1245 |
op_container_end_page |
1251 |
_version_ |
1766230474920820736 |