Earth nutation influence on Northeast Arctic cod management
Northeast Arctic cod in the Barents Sea is the largest stock of Gadus morhua cod in the world. The cod biomass seems to have stationary cycles related to the Earth's nutation. The present paper suggests that current management strategy has three aspects that may introduce an instability in the...
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2001
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fthighwire:oai:open-archive.highwire.org:icesjms:58/4/799 2023-05-15T14:30:22+02:00 Earth nutation influence on Northeast Arctic cod management Yndestad, H. 2001-01-01 00:00:00.0 text/html http://icesjms.oxfordjournals.org/cgi/content/short/58/4/799 https://doi.org/10.1006/jmsc.2000.1070 en eng Oxford University Press http://icesjms.oxfordjournals.org/cgi/content/short/58/4/799 http://dx.doi.org/10.1006/jmsc.2000.1070 Copyright (C) 2001, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer Regular Articles TEXT 2001 fthighwire https://doi.org/10.1006/jmsc.2000.1070 2013-05-27T04:12:05Z Northeast Arctic cod in the Barents Sea is the largest stock of Gadus morhua cod in the world. The cod biomass seems to have stationary cycles related to the Earth's nutation. The present paper suggests that current management strategy has three aspects that may introduce an instability in the biomass. The first is the 6–7 year positive feedback of recruitment in combination with a phase-delay in estimating data and getting the next quota of landings. The second is that the biomass has no stationary biomass reference in the control strategy and the third is the change in the rate of landings each year. Simulations demonstrate that the biomass needs a 15–20 year planning perspective and it is suggested that the spawning-stock biomass level is managed by a feedback control and the fluctuations of landings by a feed-forward control. Text Arctic cod Arctic Barents Sea Gadus morhua Northeast Arctic cod HighWire Press (Stanford University) Arctic Barents Sea ICES Journal of Marine Science 58 4 799 805 |
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Open Polar |
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HighWire Press (Stanford University) |
op_collection_id |
fthighwire |
language |
English |
topic |
Regular Articles |
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Regular Articles Yndestad, H. Earth nutation influence on Northeast Arctic cod management |
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Regular Articles |
description |
Northeast Arctic cod in the Barents Sea is the largest stock of Gadus morhua cod in the world. The cod biomass seems to have stationary cycles related to the Earth's nutation. The present paper suggests that current management strategy has three aspects that may introduce an instability in the biomass. The first is the 6–7 year positive feedback of recruitment in combination with a phase-delay in estimating data and getting the next quota of landings. The second is that the biomass has no stationary biomass reference in the control strategy and the third is the change in the rate of landings each year. Simulations demonstrate that the biomass needs a 15–20 year planning perspective and it is suggested that the spawning-stock biomass level is managed by a feedback control and the fluctuations of landings by a feed-forward control. |
format |
Text |
author |
Yndestad, H. |
author_facet |
Yndestad, H. |
author_sort |
Yndestad, H. |
title |
Earth nutation influence on Northeast Arctic cod management |
title_short |
Earth nutation influence on Northeast Arctic cod management |
title_full |
Earth nutation influence on Northeast Arctic cod management |
title_fullStr |
Earth nutation influence on Northeast Arctic cod management |
title_full_unstemmed |
Earth nutation influence on Northeast Arctic cod management |
title_sort |
earth nutation influence on northeast arctic cod management |
publisher |
Oxford University Press |
publishDate |
2001 |
url |
http://icesjms.oxfordjournals.org/cgi/content/short/58/4/799 https://doi.org/10.1006/jmsc.2000.1070 |
geographic |
Arctic Barents Sea |
geographic_facet |
Arctic Barents Sea |
genre |
Arctic cod Arctic Barents Sea Gadus morhua Northeast Arctic cod |
genre_facet |
Arctic cod Arctic Barents Sea Gadus morhua Northeast Arctic cod |
op_relation |
http://icesjms.oxfordjournals.org/cgi/content/short/58/4/799 http://dx.doi.org/10.1006/jmsc.2000.1070 |
op_rights |
Copyright (C) 2001, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer |
op_doi |
https://doi.org/10.1006/jmsc.2000.1070 |
container_title |
ICES Journal of Marine Science |
container_volume |
58 |
container_issue |
4 |
container_start_page |
799 |
op_container_end_page |
805 |
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1766304223017828352 |