Progress in determining southern blue whiting (Micromesistius australis) target strength: results of swimbladder modelling
Abstract Southern blue whiting target strength (TS) results from Kirchhoff modelling of swimbladder casts scanned using a hand-held 3D laser scanner are presented. The data are compared with the relationship between TS and fish length used for New Zealand stock-assessment surveys; TS = 21.8 log10(fo...
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Language: | English |
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Oxford University Press (OUP)
2006
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Online Access: | http://dx.doi.org/10.1016/j.icesjms.2005.12.011 http://academic.oup.com/icesjms/article-pdf/63/5/952/29125738/63-5-952.pdf |
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croxfordunivpr:10.1016/j.icesjms.2005.12.011 2023-05-15T16:19:06+02:00 Progress in determining southern blue whiting (Micromesistius australis) target strength: results of swimbladder modelling Dunford, Adam J. Macaulay, Gavin J. 2006 http://dx.doi.org/10.1016/j.icesjms.2005.12.011 http://academic.oup.com/icesjms/article-pdf/63/5/952/29125738/63-5-952.pdf en eng Oxford University Press (OUP) ICES Journal of Marine Science volume 63, issue 5, page 952-955 ISSN 1095-9289 1054-3139 Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2006 croxfordunivpr https://doi.org/10.1016/j.icesjms.2005.12.011 2022-04-15T06:24:23Z Abstract Southern blue whiting target strength (TS) results from Kirchhoff modelling of swimbladder casts scanned using a hand-held 3D laser scanner are presented. The data are compared with the relationship between TS and fish length used for New Zealand stock-assessment surveys; TS = 21.8 log10(fork length) − 72.8, at 38 kHz. This relationship has its origins in the relationship used for blue whiting (Micromesistius poutassou) in the northern hemisphere, and is based on measurements on juvenile cod (Gadus morhua). The results indicate that the blue whiting relationship is not appropriate for southern blue whiting, and suggest a much steeper slope, with TS = 38 log10(fork length) − 97, at 38 kHz. Sensitivity analyses indicate that further investigations of swimbladder tilt-angle distribution and swimbladder volume are unlikely to provide evidence to support the use of the blue whiting relationship for southern blue whiting. Article in Journal/Newspaper Gadus morhua Oxford University Press (via Crossref) New Zealand ICES Journal of Marine Science 63 5 952 955 |
institution |
Open Polar |
collection |
Oxford University Press (via Crossref) |
op_collection_id |
croxfordunivpr |
language |
English |
topic |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography Dunford, Adam J. Macaulay, Gavin J. Progress in determining southern blue whiting (Micromesistius australis) target strength: results of swimbladder modelling |
topic_facet |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract Southern blue whiting target strength (TS) results from Kirchhoff modelling of swimbladder casts scanned using a hand-held 3D laser scanner are presented. The data are compared with the relationship between TS and fish length used for New Zealand stock-assessment surveys; TS = 21.8 log10(fork length) − 72.8, at 38 kHz. This relationship has its origins in the relationship used for blue whiting (Micromesistius poutassou) in the northern hemisphere, and is based on measurements on juvenile cod (Gadus morhua). The results indicate that the blue whiting relationship is not appropriate for southern blue whiting, and suggest a much steeper slope, with TS = 38 log10(fork length) − 97, at 38 kHz. Sensitivity analyses indicate that further investigations of swimbladder tilt-angle distribution and swimbladder volume are unlikely to provide evidence to support the use of the blue whiting relationship for southern blue whiting. |
format |
Article in Journal/Newspaper |
author |
Dunford, Adam J. Macaulay, Gavin J. |
author_facet |
Dunford, Adam J. Macaulay, Gavin J. |
author_sort |
Dunford, Adam J. |
title |
Progress in determining southern blue whiting (Micromesistius australis) target strength: results of swimbladder modelling |
title_short |
Progress in determining southern blue whiting (Micromesistius australis) target strength: results of swimbladder modelling |
title_full |
Progress in determining southern blue whiting (Micromesistius australis) target strength: results of swimbladder modelling |
title_fullStr |
Progress in determining southern blue whiting (Micromesistius australis) target strength: results of swimbladder modelling |
title_full_unstemmed |
Progress in determining southern blue whiting (Micromesistius australis) target strength: results of swimbladder modelling |
title_sort |
progress in determining southern blue whiting (micromesistius australis) target strength: results of swimbladder modelling |
publisher |
Oxford University Press (OUP) |
publishDate |
2006 |
url |
http://dx.doi.org/10.1016/j.icesjms.2005.12.011 http://academic.oup.com/icesjms/article-pdf/63/5/952/29125738/63-5-952.pdf |
geographic |
New Zealand |
geographic_facet |
New Zealand |
genre |
Gadus morhua |
genre_facet |
Gadus morhua |
op_source |
ICES Journal of Marine Science volume 63, issue 5, page 952-955 ISSN 1095-9289 1054-3139 |
op_doi |
https://doi.org/10.1016/j.icesjms.2005.12.011 |
container_title |
ICES Journal of Marine Science |
container_volume |
63 |
container_issue |
5 |
container_start_page |
952 |
op_container_end_page |
955 |
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1766005428204863488 |