Estimating year-class strength of Icelandic summer-spawning herring on the basis of two survey methods
Abstract Gudmundsdottir, A., Oskarsson, G. J., and Sveinbjörnsson, S. 2007. Estimating year-class strength of Icelandic summer-spawning herring on the basis of two survey methods. – ICES Journal of Marine Science, 64: 1182–1190. Recruitment indices at age 1 and 2 were constructed for Icelandic summe...
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Online Access: | http://dx.doi.org/10.1093/icesjms/fsm088 http://academic.oup.com/icesjms/article-pdf/64/6/1182/29152452/fsm088.pdf |
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croxfordunivpr:10.1093/icesjms/fsm088 2023-12-31T10:08:21+01:00 Estimating year-class strength of Icelandic summer-spawning herring on the basis of two survey methods Gudmundsdottir, Asta Oskarsson, Gudmundur J. Sveinbjörnsson, Sveinn 2007 http://dx.doi.org/10.1093/icesjms/fsm088 http://academic.oup.com/icesjms/article-pdf/64/6/1182/29152452/fsm088.pdf en eng Oxford University Press (OUP) ICES Journal of Marine Science volume 64, issue 6, page 1182-1190 ISSN 1095-9289 1054-3139 Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2007 croxfordunivpr https://doi.org/10.1093/icesjms/fsm088 2023-12-06T08:58:49Z Abstract Gudmundsdottir, A., Oskarsson, G. J., and Sveinbjörnsson, S. 2007. Estimating year-class strength of Icelandic summer-spawning herring on the basis of two survey methods. – ICES Journal of Marine Science, 64: 1182–1190. Recruitment indices at age 1 and 2 were constructed for Icelandic summer-spawning herring using data from two inherently different survey methods on their nursery areas for the years 1988–2003. The surveys were a shrimp, bottom-trawl survey and a herring acoustic survey. Indices were compared with the year-class strength at age 2 derived from an assessment model (AMCI) used for the stock. A juvenile index at age 1 from the acoustic survey and at age 2 from the shrimp-trawl survey correlated significantly with the modelled recruitment, although only marginally with each other. One index was not considered markedly better than the other, and both have shortcomings even if the acoustic survey is believed better than the trawl survey for quantifying juvenile herring. The recruitment index at age 1 derived from the acoustic survey can be improved as an indicator of recruitment if that survey were to be extended to cover the nursery areas off western and southeastern Iceland, and the same areas covered each year. Article in Journal/Newspaper Iceland Oxford University Press (via Crossref) ICES Journal of Marine Science 64 6 1182 1190 |
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Open Polar |
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Oxford University Press (via Crossref) |
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croxfordunivpr |
language |
English |
topic |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
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Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography Gudmundsdottir, Asta Oskarsson, Gudmundur J. Sveinbjörnsson, Sveinn Estimating year-class strength of Icelandic summer-spawning herring on the basis of two survey methods |
topic_facet |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract Gudmundsdottir, A., Oskarsson, G. J., and Sveinbjörnsson, S. 2007. Estimating year-class strength of Icelandic summer-spawning herring on the basis of two survey methods. – ICES Journal of Marine Science, 64: 1182–1190. Recruitment indices at age 1 and 2 were constructed for Icelandic summer-spawning herring using data from two inherently different survey methods on their nursery areas for the years 1988–2003. The surveys were a shrimp, bottom-trawl survey and a herring acoustic survey. Indices were compared with the year-class strength at age 2 derived from an assessment model (AMCI) used for the stock. A juvenile index at age 1 from the acoustic survey and at age 2 from the shrimp-trawl survey correlated significantly with the modelled recruitment, although only marginally with each other. One index was not considered markedly better than the other, and both have shortcomings even if the acoustic survey is believed better than the trawl survey for quantifying juvenile herring. The recruitment index at age 1 derived from the acoustic survey can be improved as an indicator of recruitment if that survey were to be extended to cover the nursery areas off western and southeastern Iceland, and the same areas covered each year. |
format |
Article in Journal/Newspaper |
author |
Gudmundsdottir, Asta Oskarsson, Gudmundur J. Sveinbjörnsson, Sveinn |
author_facet |
Gudmundsdottir, Asta Oskarsson, Gudmundur J. Sveinbjörnsson, Sveinn |
author_sort |
Gudmundsdottir, Asta |
title |
Estimating year-class strength of Icelandic summer-spawning herring on the basis of two survey methods |
title_short |
Estimating year-class strength of Icelandic summer-spawning herring on the basis of two survey methods |
title_full |
Estimating year-class strength of Icelandic summer-spawning herring on the basis of two survey methods |
title_fullStr |
Estimating year-class strength of Icelandic summer-spawning herring on the basis of two survey methods |
title_full_unstemmed |
Estimating year-class strength of Icelandic summer-spawning herring on the basis of two survey methods |
title_sort |
estimating year-class strength of icelandic summer-spawning herring on the basis of two survey methods |
publisher |
Oxford University Press (OUP) |
publishDate |
2007 |
url |
http://dx.doi.org/10.1093/icesjms/fsm088 http://academic.oup.com/icesjms/article-pdf/64/6/1182/29152452/fsm088.pdf |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
ICES Journal of Marine Science volume 64, issue 6, page 1182-1190 ISSN 1095-9289 1054-3139 |
op_doi |
https://doi.org/10.1093/icesjms/fsm088 |
container_title |
ICES Journal of Marine Science |
container_volume |
64 |
container_issue |
6 |
container_start_page |
1182 |
op_container_end_page |
1190 |
_version_ |
1786841031916912640 |