Measurements of acoustic backscatter and density of captive Atlantic cod with synchronized 300-kHz multibeam and 120-kHz split-beam echosounders
<qd> Gurshin, C. W. D., Jech, J. M., Howell, W. H., Weber, T. C., and Mayer, L. A. 2009. Measurements of acoustic backscatter and density of captive Atlantic cod with synchronized 300-kHz multibeam and 120-kHz split-beam echosounders. – ICES Journal of Marine Science, 66: 1303–1309. </qd>...
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fthighwire:oai:open-archive.highwire.org:icesjms:66/6/1303 2023-05-15T15:26:56+02:00 Measurements of acoustic backscatter and density of captive Atlantic cod with synchronized 300-kHz multibeam and 120-kHz split-beam echosounders Gurshin, Christopher W. D. Jech, J. Michael Howell, W. Huntting Weber, Thomas C. Mayer, Larry A. 2009-07-01 00:00:00.0 text/html http://icesjms.oxfordjournals.org/cgi/content/short/66/6/1303 https://doi.org/10.1093/icesjms/fsp052 en eng Oxford University Press http://icesjms.oxfordjournals.org/cgi/content/short/66/6/1303 http://dx.doi.org/10.1093/icesjms/fsp052 Copyright (C) 2009, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer Articles TEXT 2009 fthighwire https://doi.org/10.1093/icesjms/fsp052 2009-07-03T20:19:12Z <qd> Gurshin, C. W. D., Jech, J. M., Howell, W. H., Weber, T. C., and Mayer, L. A. 2009. Measurements of acoustic backscatter and density of captive Atlantic cod with synchronized 300-kHz multibeam and 120-kHz split-beam echosounders. – ICES Journal of Marine Science, 66: 1303–1309. </qd>Effective management strategies for Atlantic cod ( Gadus morhua ) in the Gulf of Maine require stock assessments based on accurate estimates of its abundance and distribution. If multibeam echosounders are to provide data for such estimates, the relationship between acoustic backscatter and fish biology must be better understood. Working towards this goal, a series of acoustic measurements was made using a 120 kHz, split-beam echosounder (Simrad EK60) and a 300 kHz, multibeam echosounder (Kongsberg EM3002). The transducers from both systems were fixed to a platform over a submerged 98 m3 cage made of 5 cm stretched-nylon mesh. After standard-sphere calibrations, the cage was stocked with live, mature Atlantic cod, with a mean total length of 80.7 cm (range: 51.5–105.0 cm). The echosounders synchronously collected acoustic data, while the cod were monitored with two underwater video cameras. Cod were incrementally removed from the cage to provide a time-series of acoustic backscatter at four densities ( n = 128, 116, 66, and 23). Backscatter measurements of cod are compared between echosounders and over time, and the factors affecting the acoustically derived density estimates are discussed. The benefits and limitations of the EM3002 are highlighted. Text atlantic cod Gadus morhua HighWire Press (Stanford University) Kongsberg ENVELOPE(19.082,19.082,69.123,69.123) Howell ENVELOPE(-99.050,-99.050,-72.233,-72.233) ICES Journal of Marine Science 66 6 1303 1309 |
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HighWire Press (Stanford University) |
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English |
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Articles Gurshin, Christopher W. D. Jech, J. Michael Howell, W. Huntting Weber, Thomas C. Mayer, Larry A. Measurements of acoustic backscatter and density of captive Atlantic cod with synchronized 300-kHz multibeam and 120-kHz split-beam echosounders |
topic_facet |
Articles |
description |
<qd> Gurshin, C. W. D., Jech, J. M., Howell, W. H., Weber, T. C., and Mayer, L. A. 2009. Measurements of acoustic backscatter and density of captive Atlantic cod with synchronized 300-kHz multibeam and 120-kHz split-beam echosounders. – ICES Journal of Marine Science, 66: 1303–1309. </qd>Effective management strategies for Atlantic cod ( Gadus morhua ) in the Gulf of Maine require stock assessments based on accurate estimates of its abundance and distribution. If multibeam echosounders are to provide data for such estimates, the relationship between acoustic backscatter and fish biology must be better understood. Working towards this goal, a series of acoustic measurements was made using a 120 kHz, split-beam echosounder (Simrad EK60) and a 300 kHz, multibeam echosounder (Kongsberg EM3002). The transducers from both systems were fixed to a platform over a submerged 98 m3 cage made of 5 cm stretched-nylon mesh. After standard-sphere calibrations, the cage was stocked with live, mature Atlantic cod, with a mean total length of 80.7 cm (range: 51.5–105.0 cm). The echosounders synchronously collected acoustic data, while the cod were monitored with two underwater video cameras. Cod were incrementally removed from the cage to provide a time-series of acoustic backscatter at four densities ( n = 128, 116, 66, and 23). Backscatter measurements of cod are compared between echosounders and over time, and the factors affecting the acoustically derived density estimates are discussed. The benefits and limitations of the EM3002 are highlighted. |
format |
Text |
author |
Gurshin, Christopher W. D. Jech, J. Michael Howell, W. Huntting Weber, Thomas C. Mayer, Larry A. |
author_facet |
Gurshin, Christopher W. D. Jech, J. Michael Howell, W. Huntting Weber, Thomas C. Mayer, Larry A. |
author_sort |
Gurshin, Christopher W. D. |
title |
Measurements of acoustic backscatter and density of captive Atlantic cod with synchronized 300-kHz multibeam and 120-kHz split-beam echosounders |
title_short |
Measurements of acoustic backscatter and density of captive Atlantic cod with synchronized 300-kHz multibeam and 120-kHz split-beam echosounders |
title_full |
Measurements of acoustic backscatter and density of captive Atlantic cod with synchronized 300-kHz multibeam and 120-kHz split-beam echosounders |
title_fullStr |
Measurements of acoustic backscatter and density of captive Atlantic cod with synchronized 300-kHz multibeam and 120-kHz split-beam echosounders |
title_full_unstemmed |
Measurements of acoustic backscatter and density of captive Atlantic cod with synchronized 300-kHz multibeam and 120-kHz split-beam echosounders |
title_sort |
measurements of acoustic backscatter and density of captive atlantic cod with synchronized 300-khz multibeam and 120-khz split-beam echosounders |
publisher |
Oxford University Press |
publishDate |
2009 |
url |
http://icesjms.oxfordjournals.org/cgi/content/short/66/6/1303 https://doi.org/10.1093/icesjms/fsp052 |
long_lat |
ENVELOPE(19.082,19.082,69.123,69.123) ENVELOPE(-99.050,-99.050,-72.233,-72.233) |
geographic |
Kongsberg Howell |
geographic_facet |
Kongsberg Howell |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_relation |
http://icesjms.oxfordjournals.org/cgi/content/short/66/6/1303 http://dx.doi.org/10.1093/icesjms/fsp052 |
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/fsp052 |
container_title |
ICES Journal of Marine Science |
container_volume |
66 |
container_issue |
6 |
container_start_page |
1303 |
op_container_end_page |
1309 |
_version_ |
1766357406670913536 |