In situ measurements of capelin (Mallotus villosus) target strength in the North Pacific Ocean
<qd> Guttormsen, M. A. and Wilson, C. D. 2009. In situ measurements of capelin ( Mallotus villosus ) target strength in the North Pacific Ocean. – ICES Journal of Marine Science, 66: 000–000. </qd> In situ measurements of capelin ( Mallotus villosus ) target strength (TS) were collected...
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fthighwire:oai:open-archive.highwire.org:icesjms:fsn205v1 2023-05-15T15:38:59+02:00 In situ measurements of capelin (Mallotus villosus) target strength in the North Pacific Ocean Guttormsen, Michael A. Wilson, Christopher D. 2008-12-24 04:41:39.0 text/html http://icesjms.oxfordjournals.org/cgi/content/short/fsn205v1 https://doi.org/10.1093/icesjms/fsn205 en eng Oxford University Press http://icesjms.oxfordjournals.org/cgi/content/short/fsn205v1 http://dx.doi.org/10.1093/icesjms/fsn205 Copyright (C) 2008, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer Article TEXT 2008 fthighwire https://doi.org/10.1093/icesjms/fsn205 2013-05-26T22:26:46Z <qd> Guttormsen, M. A. and Wilson, C. D. 2009. In situ measurements of capelin ( Mallotus villosus ) target strength in the North Pacific Ocean. – ICES Journal of Marine Science, 66: 000–000. </qd> In situ measurements of capelin ( Mallotus villosus ) target strength (TS) were collected during summer 2001–2003 near Kodiak Island in the Gulf of Alaska, using a calibrated EK500 echosounder with 38 and 120 kHz split-beam transducers. Targets were detected over dispersed, night-time aggregations using standard acoustic methods, then filtered using a quality-control algorithm to reject invalid targets. The 38 kHz-based, fitted model estimate was TS = 20 log 10 L − 70.3 ( r 2 = 0.30), where L is total length of fish. Compared with other studies, the TS-fitted model at 38 kHz was similar to that calculated from swimbladder morphology measurements from St Lawrence estuary capelin (TS = 20 log 10 L − 69.3), but resulted in greater estimates than models based on in situ measurements of capelin TS in the Barents Sea (TS = 19.1 log 10 L −74.0) and northern Atlantic Ocean (TS = 20 log 10 L − 73.1). The large intraspecific variability exhibited in the fitted TS – L models for this species suggests the use of TS measurements from the geographic region where the data were collected. Text Barents Sea Kodiak Alaska HighWire Press (Stanford University) Barents Sea Gulf of Alaska Pacific ICES Journal of Marine Science 66 2 258 263 |
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HighWire Press (Stanford University) |
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Article Guttormsen, Michael A. Wilson, Christopher D. In situ measurements of capelin (Mallotus villosus) target strength in the North Pacific Ocean |
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description |
<qd> Guttormsen, M. A. and Wilson, C. D. 2009. In situ measurements of capelin ( Mallotus villosus ) target strength in the North Pacific Ocean. – ICES Journal of Marine Science, 66: 000–000. </qd> In situ measurements of capelin ( Mallotus villosus ) target strength (TS) were collected during summer 2001–2003 near Kodiak Island in the Gulf of Alaska, using a calibrated EK500 echosounder with 38 and 120 kHz split-beam transducers. Targets were detected over dispersed, night-time aggregations using standard acoustic methods, then filtered using a quality-control algorithm to reject invalid targets. The 38 kHz-based, fitted model estimate was TS = 20 log 10 L − 70.3 ( r 2 = 0.30), where L is total length of fish. Compared with other studies, the TS-fitted model at 38 kHz was similar to that calculated from swimbladder morphology measurements from St Lawrence estuary capelin (TS = 20 log 10 L − 69.3), but resulted in greater estimates than models based on in situ measurements of capelin TS in the Barents Sea (TS = 19.1 log 10 L −74.0) and northern Atlantic Ocean (TS = 20 log 10 L − 73.1). The large intraspecific variability exhibited in the fitted TS – L models for this species suggests the use of TS measurements from the geographic region where the data were collected. |
format |
Text |
author |
Guttormsen, Michael A. Wilson, Christopher D. |
author_facet |
Guttormsen, Michael A. Wilson, Christopher D. |
author_sort |
Guttormsen, Michael A. |
title |
In situ measurements of capelin (Mallotus villosus) target strength in the North Pacific Ocean |
title_short |
In situ measurements of capelin (Mallotus villosus) target strength in the North Pacific Ocean |
title_full |
In situ measurements of capelin (Mallotus villosus) target strength in the North Pacific Ocean |
title_fullStr |
In situ measurements of capelin (Mallotus villosus) target strength in the North Pacific Ocean |
title_full_unstemmed |
In situ measurements of capelin (Mallotus villosus) target strength in the North Pacific Ocean |
title_sort |
in situ measurements of capelin (mallotus villosus) target strength in the north pacific ocean |
publisher |
Oxford University Press |
publishDate |
2008 |
url |
http://icesjms.oxfordjournals.org/cgi/content/short/fsn205v1 https://doi.org/10.1093/icesjms/fsn205 |
geographic |
Barents Sea Gulf of Alaska Pacific |
geographic_facet |
Barents Sea Gulf of Alaska Pacific |
genre |
Barents Sea Kodiak Alaska |
genre_facet |
Barents Sea Kodiak Alaska |
op_relation |
http://icesjms.oxfordjournals.org/cgi/content/short/fsn205v1 http://dx.doi.org/10.1093/icesjms/fsn205 |
op_rights |
Copyright (C) 2008, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer |
op_doi |
https://doi.org/10.1093/icesjms/fsn205 |
container_title |
ICES Journal of Marine Science |
container_volume |
66 |
container_issue |
2 |
container_start_page |
258 |
op_container_end_page |
263 |
_version_ |
1766370428741222400 |