Extracting fish and water velocity from Doppler profiler data
Abstract Zedel, L., and Cyr-Racine, F-Y. 2009. Extracting fish and water velocity from Doppler profiler data. – ICES Journal of Marine Science, 66: 1846–1852. Doppler current profilers are optimized for measuring water velocities, but have the demonstrated capability to measure fish swimming speeds....
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Online Access: | http://dx.doi.org/10.1093/icesjms/fsp168 http://academic.oup.com/icesjms/article-pdf/66/9/1846/29135025/fsp168.pdf |
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croxfordunivpr:10.1093/icesjms/fsp168 2023-10-01T03:54:33+02:00 Extracting fish and water velocity from Doppler profiler data Zedel, Len Cyr-Racine, Francis-Yan 2009 http://dx.doi.org/10.1093/icesjms/fsp168 http://academic.oup.com/icesjms/article-pdf/66/9/1846/29135025/fsp168.pdf en eng Oxford University Press (OUP) ICES Journal of Marine Science volume 66, issue 9, page 1846-1852 ISSN 1095-9289 1054-3139 Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2009 croxfordunivpr https://doi.org/10.1093/icesjms/fsp168 2023-09-01T10:57:17Z Abstract Zedel, L., and Cyr-Racine, F-Y. 2009. Extracting fish and water velocity from Doppler profiler data. – ICES Journal of Marine Science, 66: 1846–1852. Doppler current profilers are optimized for measuring water velocities, but have the demonstrated capability to measure fish swimming speeds. This is possible when fish form schools that are large enough for all multiple Doppler sonar beams to sample the fish speeds at the same time. In situations where fish are not present in at least three acoustic beams, it is impossible to extract fish velocity with the data-processing algorithms normally used to extract water velocity. We present an alternative method of analysing Doppler sonar data that treats data from individual acoustic beams independently, so that velocities can be extracted when fish appear intermittently in the sonar beams. The method determines the variance for each velocity estimate so that data averaging can be adjusted to achieve the desired accuracy. The algorithm is applied to extract both water and fish velocities from Doppler profiler observations of overwintering Atlantic cod (Gadus morhua) in Smith Sound, Newfoundland. Currents in this enclosed coastal area are slow (∼10 cm s−1), and the fish appear to move passively with the water much of the time. However, there are times when the fish have velocities different from those of the water, and profiles averaged over 20 d show clear differences in fish and water velocities. Article in Journal/Newspaper atlantic cod Gadus morhua Newfoundland Smith sound Oxford University Press (via Crossref) Smith Sound ENVELOPE(-73.996,-73.996,78.419,78.419) ICES Journal of Marine Science 66 9 1846 1852 |
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Open Polar |
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Oxford University Press (via Crossref) |
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croxfordunivpr |
language |
English |
topic |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
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Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography Zedel, Len Cyr-Racine, Francis-Yan Extracting fish and water velocity from Doppler profiler data |
topic_facet |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract Zedel, L., and Cyr-Racine, F-Y. 2009. Extracting fish and water velocity from Doppler profiler data. – ICES Journal of Marine Science, 66: 1846–1852. Doppler current profilers are optimized for measuring water velocities, but have the demonstrated capability to measure fish swimming speeds. This is possible when fish form schools that are large enough for all multiple Doppler sonar beams to sample the fish speeds at the same time. In situations where fish are not present in at least three acoustic beams, it is impossible to extract fish velocity with the data-processing algorithms normally used to extract water velocity. We present an alternative method of analysing Doppler sonar data that treats data from individual acoustic beams independently, so that velocities can be extracted when fish appear intermittently in the sonar beams. The method determines the variance for each velocity estimate so that data averaging can be adjusted to achieve the desired accuracy. The algorithm is applied to extract both water and fish velocities from Doppler profiler observations of overwintering Atlantic cod (Gadus morhua) in Smith Sound, Newfoundland. Currents in this enclosed coastal area are slow (∼10 cm s−1), and the fish appear to move passively with the water much of the time. However, there are times when the fish have velocities different from those of the water, and profiles averaged over 20 d show clear differences in fish and water velocities. |
format |
Article in Journal/Newspaper |
author |
Zedel, Len Cyr-Racine, Francis-Yan |
author_facet |
Zedel, Len Cyr-Racine, Francis-Yan |
author_sort |
Zedel, Len |
title |
Extracting fish and water velocity from Doppler profiler data |
title_short |
Extracting fish and water velocity from Doppler profiler data |
title_full |
Extracting fish and water velocity from Doppler profiler data |
title_fullStr |
Extracting fish and water velocity from Doppler profiler data |
title_full_unstemmed |
Extracting fish and water velocity from Doppler profiler data |
title_sort |
extracting fish and water velocity from doppler profiler data |
publisher |
Oxford University Press (OUP) |
publishDate |
2009 |
url |
http://dx.doi.org/10.1093/icesjms/fsp168 http://academic.oup.com/icesjms/article-pdf/66/9/1846/29135025/fsp168.pdf |
long_lat |
ENVELOPE(-73.996,-73.996,78.419,78.419) |
geographic |
Smith Sound |
geographic_facet |
Smith Sound |
genre |
atlantic cod Gadus morhua Newfoundland Smith sound |
genre_facet |
atlantic cod Gadus morhua Newfoundland Smith sound |
op_source |
ICES Journal of Marine Science volume 66, issue 9, page 1846-1852 ISSN 1095-9289 1054-3139 |
op_doi |
https://doi.org/10.1093/icesjms/fsp168 |
container_title |
ICES Journal of Marine Science |
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66 |
container_issue |
9 |
container_start_page |
1846 |
op_container_end_page |
1852 |
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1778522317584859136 |