Use of a two-frequency algorithm to determine size and abundance of plankton in three widely spaced locations
The application of a two-frequency algorithm to the in situ estimation of large zooplankton is explored in an effort to use information from more than one acoustic frequency. To accomplish this, 38 and 120 kHz echo-sounders, found on most fisheries research vessels, were utilized. A two-frequency me...
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1996
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fthighwire:oai:open-archive.highwire.org:icesjms:53/2/209 2023-05-15T14:04:17+02:00 Use of a two-frequency algorithm to determine size and abundance of plankton in three widely spaced locations Mitson, R. B. Simard, Y. Goss, C. 1996-04-01 00:00:00.0 text/html http://icesjms.oxfordjournals.org/cgi/content/short/53/2/209 https://doi.org/10.1006/jmsc.1996.0024 en eng Oxford University Press http://icesjms.oxfordjournals.org/cgi/content/short/53/2/209 http://dx.doi.org/10.1006/jmsc.1996.0024 Copyright (C) 1996, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer Regular Articles TEXT 1996 fthighwire https://doi.org/10.1006/jmsc.1996.0024 2013-05-26T13:05:00Z The application of a two-frequency algorithm to the in situ estimation of large zooplankton is explored in an effort to use information from more than one acoustic frequency. To accomplish this, 38 and 120 kHz echo-sounders, found on most fisheries research vessels, were utilized. A two-frequency method using a highpass fluid sphere scattering model was employed to estimate the mean size (length) and the density per m3 of the dominant acoustic scatterers (mainly euphausiids and shrimps), by selected depth layer. Three locations were surveyed: the Gulf of St Lawrence, the Antarctic, and the Irish Sea. Ground-truth samples were collected from various plankton net systems, the catches being compared to the acoustic estimates. Results are discussed with regard to conditions that apply to the method, the ground-truth performance and the relative complexity of the zooplankton composition at the different study sites. The conclusion is that this method has provided satisfactory results but still has a capacity for refinement. Text Antarc* Antarctic HighWire Press (Stanford University) Antarctic The Antarctic ICES Journal of Marine Science 53 2 209 215 |
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HighWire Press (Stanford University) |
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English |
topic |
Regular Articles |
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Regular Articles Mitson, R. B. Simard, Y. Goss, C. Use of a two-frequency algorithm to determine size and abundance of plankton in three widely spaced locations |
topic_facet |
Regular Articles |
description |
The application of a two-frequency algorithm to the in situ estimation of large zooplankton is explored in an effort to use information from more than one acoustic frequency. To accomplish this, 38 and 120 kHz echo-sounders, found on most fisheries research vessels, were utilized. A two-frequency method using a highpass fluid sphere scattering model was employed to estimate the mean size (length) and the density per m3 of the dominant acoustic scatterers (mainly euphausiids and shrimps), by selected depth layer. Three locations were surveyed: the Gulf of St Lawrence, the Antarctic, and the Irish Sea. Ground-truth samples were collected from various plankton net systems, the catches being compared to the acoustic estimates. Results are discussed with regard to conditions that apply to the method, the ground-truth performance and the relative complexity of the zooplankton composition at the different study sites. The conclusion is that this method has provided satisfactory results but still has a capacity for refinement. |
format |
Text |
author |
Mitson, R. B. Simard, Y. Goss, C. |
author_facet |
Mitson, R. B. Simard, Y. Goss, C. |
author_sort |
Mitson, R. B. |
title |
Use of a two-frequency algorithm to determine size and abundance of plankton in three widely spaced locations |
title_short |
Use of a two-frequency algorithm to determine size and abundance of plankton in three widely spaced locations |
title_full |
Use of a two-frequency algorithm to determine size and abundance of plankton in three widely spaced locations |
title_fullStr |
Use of a two-frequency algorithm to determine size and abundance of plankton in three widely spaced locations |
title_full_unstemmed |
Use of a two-frequency algorithm to determine size and abundance of plankton in three widely spaced locations |
title_sort |
use of a two-frequency algorithm to determine size and abundance of plankton in three widely spaced locations |
publisher |
Oxford University Press |
publishDate |
1996 |
url |
http://icesjms.oxfordjournals.org/cgi/content/short/53/2/209 https://doi.org/10.1006/jmsc.1996.0024 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
http://icesjms.oxfordjournals.org/cgi/content/short/53/2/209 http://dx.doi.org/10.1006/jmsc.1996.0024 |
op_rights |
Copyright (C) 1996, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer |
op_doi |
https://doi.org/10.1006/jmsc.1996.0024 |
container_title |
ICES Journal of Marine Science |
container_volume |
53 |
container_issue |
2 |
container_start_page |
209 |
op_container_end_page |
215 |
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1766275320889999360 |