Lateral target strength of Antarctic krill
An area of high krill ( Euphausia superba Dana) density was continuously monitored with down-looking and side-looking sonars over a period of 24 h. Measurements of volume backscattering strength were used to describe the density of krill with depth and the vertical movement of krill over time. In si...
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Oxford University Press
1996
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fthighwire:oai:open-archive.highwire.org:icesjms:53/2/297 2023-05-15T14:04:17+02:00 Lateral target strength of Antarctic krill Hewitt, Roger P. Demer, David A. 1996-04-01 00:00:00.0 text/html http://icesjms.oxfordjournals.org/cgi/content/short/53/2/297 https://doi.org/10.1006/jmsc.1996.0038 en eng Oxford University Press http://icesjms.oxfordjournals.org/cgi/content/short/53/2/297 http://dx.doi.org/10.1006/jmsc.1996.0038 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.1996.0038 2013-05-26T13:05:00Z An area of high krill ( Euphausia superba Dana) density was continuously monitored with down-looking and side-looking sonars over a period of 24 h. Measurements of volume backscattering strength were used to describe the density of krill with depth and the vertical movement of krill over time. In situ measurements were made of dorsal aspect target strength (TS) and, as krill moved into the near-surface layer (0–15 m), in situ measurements were made of lateral-aspect TS. The probability density function (PDF) of TS measurements made with the down-looking transducer had a mode at approximately −73 dB. The PDF of TS measurements made with the side-looking transducer was broader with a mode at approximately −67 dB. Sampled krill had a bi-modal length distribution with a major mode at 44 mm and a minor mode at approximately 30 mm. Text Antarc* Antarctic Antarctic Krill Euphausia superba HighWire Press (Stanford University) Antarctic ICES Journal of Marine Science 53 2 297 302 |
institution |
Open Polar |
collection |
HighWire Press (Stanford University) |
op_collection_id |
fthighwire |
language |
English |
topic |
Regular Articles |
spellingShingle |
Regular Articles Hewitt, Roger P. Demer, David A. Lateral target strength of Antarctic krill |
topic_facet |
Regular Articles |
description |
An area of high krill ( Euphausia superba Dana) density was continuously monitored with down-looking and side-looking sonars over a period of 24 h. Measurements of volume backscattering strength were used to describe the density of krill with depth and the vertical movement of krill over time. In situ measurements were made of dorsal aspect target strength (TS) and, as krill moved into the near-surface layer (0–15 m), in situ measurements were made of lateral-aspect TS. The probability density function (PDF) of TS measurements made with the down-looking transducer had a mode at approximately −73 dB. The PDF of TS measurements made with the side-looking transducer was broader with a mode at approximately −67 dB. Sampled krill had a bi-modal length distribution with a major mode at 44 mm and a minor mode at approximately 30 mm. |
format |
Text |
author |
Hewitt, Roger P. Demer, David A. |
author_facet |
Hewitt, Roger P. Demer, David A. |
author_sort |
Hewitt, Roger P. |
title |
Lateral target strength of Antarctic krill |
title_short |
Lateral target strength of Antarctic krill |
title_full |
Lateral target strength of Antarctic krill |
title_fullStr |
Lateral target strength of Antarctic krill |
title_full_unstemmed |
Lateral target strength of Antarctic krill |
title_sort |
lateral target strength of antarctic krill |
publisher |
Oxford University Press |
publishDate |
1996 |
url |
http://icesjms.oxfordjournals.org/cgi/content/short/53/2/297 https://doi.org/10.1006/jmsc.1996.0038 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctic Krill Euphausia superba |
genre_facet |
Antarc* Antarctic Antarctic Krill Euphausia superba |
op_relation |
http://icesjms.oxfordjournals.org/cgi/content/short/53/2/297 http://dx.doi.org/10.1006/jmsc.1996.0038 |
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.1996.0038 |
container_title |
ICES Journal of Marine Science |
container_volume |
53 |
container_issue |
2 |
container_start_page |
297 |
op_container_end_page |
302 |
_version_ |
1766275321054625792 |