Neocalanus scattering layers near the western Aleutian Islands
Dense copepod scattering layers were detected in the upper 50 m of the water column in the Bering Sea north of the western Aleutian Islands during June 1992. Acoustic data were collected at frequencies of 200 and 420 kHz, and compared with simultaneous estimates of wet weight biomass from net tows....
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Oxford University Press
1998
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fthighwire:oai:open-archive.highwire.org:plankt:20/6/1189 2023-05-15T15:43:40+02:00 Neocalanus scattering layers near the western Aleutian Islands Coyle, K.O. 1998-01-01 00:00:00.0 text/html http://plankt.oxfordjournals.org/cgi/content/short/20/6/1189 https://doi.org/10.1093/plankt/20.6.1189 en eng Oxford University Press http://plankt.oxfordjournals.org/cgi/content/short/20/6/1189 http://dx.doi.org/10.1093/plankt/20.6.1189 Copyright (C) 1998, Oxford University Press ORIGINAL ARTICLES TEXT 1998 fthighwire https://doi.org/10.1093/plankt/20.6.1189 2007-06-24T03:36:32Z Dense copepod scattering layers were detected in the upper 50 m of the water column in the Bering Sea north of the western Aleutian Islands during June 1992. Acoustic data were collected at frequencies of 200 and 420 kHz, and compared with simultaneous estimates of wet weight biomass from net tows. Regression of net and acousticdata produced a scaling factor of ā69.6 dB gā1 to convert volume scattering to biomass. Application of the fluid sphere scattering model produced an average equivalent spherical radius for the targets of 0.54 mm. The major sound-scattering organism, Neocalanus cristatus copepodid stage V, dominated the biomass in the pycnocline between the upper mixed layer and the underlying cold intermediate layer. Populations were dominated by Neocalanus plumchrus and Neocalanus flemingeri ,with greatest abundance above the pycnocline. Text Bering Sea Aleutian Islands HighWire Press (Stanford University) Bering Sea Journal of Plankton Research 20 6 1189 1202 |
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Open Polar |
collection |
HighWire Press (Stanford University) |
op_collection_id |
fthighwire |
language |
English |
topic |
ORIGINAL ARTICLES |
spellingShingle |
ORIGINAL ARTICLES Coyle, K.O. Neocalanus scattering layers near the western Aleutian Islands |
topic_facet |
ORIGINAL ARTICLES |
description |
Dense copepod scattering layers were detected in the upper 50 m of the water column in the Bering Sea north of the western Aleutian Islands during June 1992. Acoustic data were collected at frequencies of 200 and 420 kHz, and compared with simultaneous estimates of wet weight biomass from net tows. Regression of net and acousticdata produced a scaling factor of ā69.6 dB gā1 to convert volume scattering to biomass. Application of the fluid sphere scattering model produced an average equivalent spherical radius for the targets of 0.54 mm. The major sound-scattering organism, Neocalanus cristatus copepodid stage V, dominated the biomass in the pycnocline between the upper mixed layer and the underlying cold intermediate layer. Populations were dominated by Neocalanus plumchrus and Neocalanus flemingeri ,with greatest abundance above the pycnocline. |
format |
Text |
author |
Coyle, K.O. |
author_facet |
Coyle, K.O. |
author_sort |
Coyle, K.O. |
title |
Neocalanus scattering layers near the western Aleutian Islands |
title_short |
Neocalanus scattering layers near the western Aleutian Islands |
title_full |
Neocalanus scattering layers near the western Aleutian Islands |
title_fullStr |
Neocalanus scattering layers near the western Aleutian Islands |
title_full_unstemmed |
Neocalanus scattering layers near the western Aleutian Islands |
title_sort |
neocalanus scattering layers near the western aleutian islands |
publisher |
Oxford University Press |
publishDate |
1998 |
url |
http://plankt.oxfordjournals.org/cgi/content/short/20/6/1189 https://doi.org/10.1093/plankt/20.6.1189 |
geographic |
Bering Sea |
geographic_facet |
Bering Sea |
genre |
Bering Sea Aleutian Islands |
genre_facet |
Bering Sea Aleutian Islands |
op_relation |
http://plankt.oxfordjournals.org/cgi/content/short/20/6/1189 http://dx.doi.org/10.1093/plankt/20.6.1189 |
op_rights |
Copyright (C) 1998, Oxford University Press |
op_doi |
https://doi.org/10.1093/plankt/20.6.1189 |
container_title |
Journal of Plankton Research |
container_volume |
20 |
container_issue |
6 |
container_start_page |
1189 |
op_container_end_page |
1202 |
_version_ |
1766377859046178816 |