A comparative acoustic-abundance estimation of pelagic redfish (Sebastes mentella) from hull-mounted and deep-towed acoustic systems
Abstract During an international acoustic survey on pelagic redfish (Sebastes mentella) in the Irminger Sea in June–July 2001, a deep-towed vehicle carrying a dual-frequency SIMRAD EK60 Mk1 echosounder was used experimentally to observe and estimate redfish abundance at depths greater than 500 m. Co...
Published in: | ICES Journal of Marine Science |
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Language: | English |
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2003
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Online Access: | http://dx.doi.org/10.1016/s1054-3139(03)00045-6 http://academic.oup.com/icesjms/article-pdf/60/3/472/29119348/60-3-472.pdf |
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croxfordunivpr:10.1016/s1054-3139(03)00045-6 2023-11-05T03:45:01+01:00 A comparative acoustic-abundance estimation of pelagic redfish (Sebastes mentella) from hull-mounted and deep-towed acoustic systems Dalen, John Nedreaas, Kjell Pedersen, Ronald 2003 http://dx.doi.org/10.1016/s1054-3139(03)00045-6 http://academic.oup.com/icesjms/article-pdf/60/3/472/29119348/60-3-472.pdf en eng Oxford University Press (OUP) ICES Journal of Marine Science volume 60, issue 3, page 472-479 ISSN 1095-9289 1054-3139 Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2003 croxfordunivpr https://doi.org/10.1016/s1054-3139(03)00045-6 2023-10-06T10:38:27Z Abstract During an international acoustic survey on pelagic redfish (Sebastes mentella) in the Irminger Sea in June–July 2001, a deep-towed vehicle carrying a dual-frequency SIMRAD EK60 Mk1 echosounder was used experimentally to observe and estimate redfish abundance at depths greater than 500 m. Comparison was made with the hull-mounted SIMRAD EK500 echosounder. The deep-towed echosounder improved the spatial resolution of fish in scattering layers as well as the ability to scrutinize and interpret fish echoes. The signal-to-noise ratio was better than that of the hull-mounted system. The fish abundance measured by the deep-towed sounder was consistently high compared to the hull-mounted sounder, particularly, at greater depths. For redfish within the deep scattering layer (DSL), the abundance was, on average, 5% higher, increasing to 55% for redfish below the DSL. From these findings it is concluded that a deep-towed echosounder is superior to hull-mounted ones for estimating the abundance of fish swimming in deep water. Article in Journal/Newspaper Sebastes mentella Oxford University Press (via Crossref) ICES Journal of Marine Science 60 3 472 479 |
institution |
Open Polar |
collection |
Oxford University Press (via Crossref) |
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 Dalen, John Nedreaas, Kjell Pedersen, Ronald A comparative acoustic-abundance estimation of pelagic redfish (Sebastes mentella) from hull-mounted and deep-towed acoustic systems |
topic_facet |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract During an international acoustic survey on pelagic redfish (Sebastes mentella) in the Irminger Sea in June–July 2001, a deep-towed vehicle carrying a dual-frequency SIMRAD EK60 Mk1 echosounder was used experimentally to observe and estimate redfish abundance at depths greater than 500 m. Comparison was made with the hull-mounted SIMRAD EK500 echosounder. The deep-towed echosounder improved the spatial resolution of fish in scattering layers as well as the ability to scrutinize and interpret fish echoes. The signal-to-noise ratio was better than that of the hull-mounted system. The fish abundance measured by the deep-towed sounder was consistently high compared to the hull-mounted sounder, particularly, at greater depths. For redfish within the deep scattering layer (DSL), the abundance was, on average, 5% higher, increasing to 55% for redfish below the DSL. From these findings it is concluded that a deep-towed echosounder is superior to hull-mounted ones for estimating the abundance of fish swimming in deep water. |
format |
Article in Journal/Newspaper |
author |
Dalen, John Nedreaas, Kjell Pedersen, Ronald |
author_facet |
Dalen, John Nedreaas, Kjell Pedersen, Ronald |
author_sort |
Dalen, John |
title |
A comparative acoustic-abundance estimation of pelagic redfish (Sebastes mentella) from hull-mounted and deep-towed acoustic systems |
title_short |
A comparative acoustic-abundance estimation of pelagic redfish (Sebastes mentella) from hull-mounted and deep-towed acoustic systems |
title_full |
A comparative acoustic-abundance estimation of pelagic redfish (Sebastes mentella) from hull-mounted and deep-towed acoustic systems |
title_fullStr |
A comparative acoustic-abundance estimation of pelagic redfish (Sebastes mentella) from hull-mounted and deep-towed acoustic systems |
title_full_unstemmed |
A comparative acoustic-abundance estimation of pelagic redfish (Sebastes mentella) from hull-mounted and deep-towed acoustic systems |
title_sort |
comparative acoustic-abundance estimation of pelagic redfish (sebastes mentella) from hull-mounted and deep-towed acoustic systems |
publisher |
Oxford University Press (OUP) |
publishDate |
2003 |
url |
http://dx.doi.org/10.1016/s1054-3139(03)00045-6 http://academic.oup.com/icesjms/article-pdf/60/3/472/29119348/60-3-472.pdf |
genre |
Sebastes mentella |
genre_facet |
Sebastes mentella |
op_source |
ICES Journal of Marine Science volume 60, issue 3, page 472-479 ISSN 1095-9289 1054-3139 |
op_doi |
https://doi.org/10.1016/s1054-3139(03)00045-6 |
container_title |
ICES Journal of Marine Science |
container_volume |
60 |
container_issue |
3 |
container_start_page |
472 |
op_container_end_page |
479 |
_version_ |
1781706291382583296 |