Consecutive acoustic observations of an Atlantic herring school in the Northwest Atlantic
Abstract Weber, T. C., Peña, H., and Jech, J. M. 2009. Consecutive acoustic observations of an Atlantic herring school in the Northwest Atlantic. – ICES Journal of Marine Science, 66: 1270–1277. Several successive images of the same school of Atlantic herring (Clupea harengus) were collected over th...
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Online Access: | http://dx.doi.org/10.1093/icesjms/fsp090 http://academic.oup.com/icesjms/article-pdf/66/6/1270/29134065/fsp090.pdf |
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croxfordunivpr:10.1093/icesjms/fsp090 2024-09-15T18:26:18+00:00 Consecutive acoustic observations of an Atlantic herring school in the Northwest Atlantic Weber, Thomas C. Peña, Héctor Jech, J. Michael 2009 http://dx.doi.org/10.1093/icesjms/fsp090 http://academic.oup.com/icesjms/article-pdf/66/6/1270/29134065/fsp090.pdf en eng Oxford University Press (OUP) ICES Journal of Marine Science volume 66, issue 6, page 1270-1277 ISSN 1095-9289 1054-3139 journal-article 2009 croxfordunivpr https://doi.org/10.1093/icesjms/fsp090 2024-09-03T04:09:40Z Abstract Weber, T. C., Peña, H., and Jech, J. M. 2009. Consecutive acoustic observations of an Atlantic herring school in the Northwest Atlantic. – ICES Journal of Marine Science, 66: 1270–1277. Several successive images of the same school of Atlantic herring (Clupea harengus) were collected over the course of ∼1 h just north of Georges Bank in the Northwest Atlantic. Although the fish may not have been in their natural, undisturbed state, we observed what appeared to be the fish school fragmenting and dispersing, using a split-beam and a multibeam echosounder. Calibrated, 38 kHz, split-beam echosounder (Simrad EK60) and trawl-catch data provided accurate measures of the fish density beneath the vessel. Uncalibrated, 400 kHz, multibeam-echosounder (Reson 7125) data provided synoptic observations of the fish school including estimates of the school volume, morphology, and behaviour. Observations of the angular dependence in the multibeam-echosounder measurements of backscatter from fish allow investigation of the efficacy of extrapolating fish-school densities measured by the split-beam echosounder to the entire school. Article in Journal/Newspaper Northwest Atlantic Oxford University Press ICES Journal of Marine Science 66 6 1270 1277 |
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Oxford University Press |
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English |
description |
Abstract Weber, T. C., Peña, H., and Jech, J. M. 2009. Consecutive acoustic observations of an Atlantic herring school in the Northwest Atlantic. – ICES Journal of Marine Science, 66: 1270–1277. Several successive images of the same school of Atlantic herring (Clupea harengus) were collected over the course of ∼1 h just north of Georges Bank in the Northwest Atlantic. Although the fish may not have been in their natural, undisturbed state, we observed what appeared to be the fish school fragmenting and dispersing, using a split-beam and a multibeam echosounder. Calibrated, 38 kHz, split-beam echosounder (Simrad EK60) and trawl-catch data provided accurate measures of the fish density beneath the vessel. Uncalibrated, 400 kHz, multibeam-echosounder (Reson 7125) data provided synoptic observations of the fish school including estimates of the school volume, morphology, and behaviour. Observations of the angular dependence in the multibeam-echosounder measurements of backscatter from fish allow investigation of the efficacy of extrapolating fish-school densities measured by the split-beam echosounder to the entire school. |
format |
Article in Journal/Newspaper |
author |
Weber, Thomas C. Peña, Héctor Jech, J. Michael |
spellingShingle |
Weber, Thomas C. Peña, Héctor Jech, J. Michael Consecutive acoustic observations of an Atlantic herring school in the Northwest Atlantic |
author_facet |
Weber, Thomas C. Peña, Héctor Jech, J. Michael |
author_sort |
Weber, Thomas C. |
title |
Consecutive acoustic observations of an Atlantic herring school in the Northwest Atlantic |
title_short |
Consecutive acoustic observations of an Atlantic herring school in the Northwest Atlantic |
title_full |
Consecutive acoustic observations of an Atlantic herring school in the Northwest Atlantic |
title_fullStr |
Consecutive acoustic observations of an Atlantic herring school in the Northwest Atlantic |
title_full_unstemmed |
Consecutive acoustic observations of an Atlantic herring school in the Northwest Atlantic |
title_sort |
consecutive acoustic observations of an atlantic herring school in the northwest atlantic |
publisher |
Oxford University Press (OUP) |
publishDate |
2009 |
url |
http://dx.doi.org/10.1093/icesjms/fsp090 http://academic.oup.com/icesjms/article-pdf/66/6/1270/29134065/fsp090.pdf |
genre |
Northwest Atlantic |
genre_facet |
Northwest Atlantic |
op_source |
ICES Journal of Marine Science volume 66, issue 6, page 1270-1277 ISSN 1095-9289 1054-3139 |
op_doi |
https://doi.org/10.1093/icesjms/fsp090 |
container_title |
ICES Journal of Marine Science |
container_volume |
66 |
container_issue |
6 |
container_start_page |
1270 |
op_container_end_page |
1277 |
_version_ |
1810466762982948864 |