Three options for rebuilding the cod stock in the eastern Baltic Sea
The cod Gadus morhua stock in the eastern Baltic Sea has seen a recent miraculous recovery, mainly due to a drastic decrease in fishing mortality (F). Here we explore 3 options for rebuilding the stock to the size (biomass that can produce the maximum sustainable yield, or Bmsy) that is required by...
Published in: | Marine Ecology Progress Series |
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Language: | English |
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Inter Research
2011
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Online Access: | https://oceanrep.geomar.de/id/eprint/12042/ https://oceanrep.geomar.de/id/eprint/12042/1/BalticCodMEPS.pdf https://oceanrep.geomar.de/id/eprint/12042/4/m434p197_supp.txt https://doi.org/10.3354/meps09247 |
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ftoceanrep:oai:oceanrep.geomar.de:12042 2023-05-15T16:19:18+02:00 Three options for rebuilding the cod stock in the eastern Baltic Sea Froese, Rainer Quaas, Martin 2011 text https://oceanrep.geomar.de/id/eprint/12042/ https://oceanrep.geomar.de/id/eprint/12042/1/BalticCodMEPS.pdf https://oceanrep.geomar.de/id/eprint/12042/4/m434p197_supp.txt https://doi.org/10.3354/meps09247 en eng Inter Research https://oceanrep.geomar.de/id/eprint/12042/1/BalticCodMEPS.pdf https://oceanrep.geomar.de/id/eprint/12042/4/m434p197_supp.txt Froese, R. and Quaas, M. (2011) Three options for rebuilding the cod stock in the eastern Baltic Sea. Open Access Marine Ecology Progress Series, 434 . pp. 197-200. DOI 10.3354/meps09247 <https://doi.org/10.3354/meps09247>. doi:10.3354/meps09247 info:eu-repo/semantics/openAccess Article PeerReviewed 2011 ftoceanrep https://doi.org/10.3354/meps09247 2023-04-07T15:00:22Z The cod Gadus morhua stock in the eastern Baltic Sea has seen a recent miraculous recovery, mainly due to a drastic decrease in fishing mortality (F). Here we explore 3 options for rebuilding the stock to the size (biomass that can produce the maximum sustainable yield, or Bmsy) that is required by international law and that can support high long-term yields. The first option implements a fishing mortality of F = 0.3, as is aimed for under the current European Commission management plan. The second option implements in addition the current constraint of a maximum annual increase of 15% in total allowable catches until a catch corresponding to F = 0.3 is reached. The third option freezes the 2010 catch for 2 yr before allowing a linear increase with spawning stock biomass towards 90% of the maximum sustainable yield. We show that the first option provides the highest catches for the first 3 yr, but fails to rebuild the biomass to the level of Bmsy. The second option rebuilds the biomass above Bmsy only temporarily and results in the lowest catches over a 10 yr period. The third option rebuilds the biomass above Bmsy and provides high catches and the highest profit within 10 yr. Within a decade, all 3 options provide several-fold higher biomasses, catches, and profits compared to the current situation, underlining the benefits that can be obtained from proper fisheries management. In comparison, the so-called precautionary management approach (F = 0.6) implemented until 2006 would perform worse in every respect. Article in Journal/Newspaper Gadus morhua OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Marine Ecology Progress Series 434 197 200 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
The cod Gadus morhua stock in the eastern Baltic Sea has seen a recent miraculous recovery, mainly due to a drastic decrease in fishing mortality (F). Here we explore 3 options for rebuilding the stock to the size (biomass that can produce the maximum sustainable yield, or Bmsy) that is required by international law and that can support high long-term yields. The first option implements a fishing mortality of F = 0.3, as is aimed for under the current European Commission management plan. The second option implements in addition the current constraint of a maximum annual increase of 15% in total allowable catches until a catch corresponding to F = 0.3 is reached. The third option freezes the 2010 catch for 2 yr before allowing a linear increase with spawning stock biomass towards 90% of the maximum sustainable yield. We show that the first option provides the highest catches for the first 3 yr, but fails to rebuild the biomass to the level of Bmsy. The second option rebuilds the biomass above Bmsy only temporarily and results in the lowest catches over a 10 yr period. The third option rebuilds the biomass above Bmsy and provides high catches and the highest profit within 10 yr. Within a decade, all 3 options provide several-fold higher biomasses, catches, and profits compared to the current situation, underlining the benefits that can be obtained from proper fisheries management. In comparison, the so-called precautionary management approach (F = 0.6) implemented until 2006 would perform worse in every respect. |
format |
Article in Journal/Newspaper |
author |
Froese, Rainer Quaas, Martin |
spellingShingle |
Froese, Rainer Quaas, Martin Three options for rebuilding the cod stock in the eastern Baltic Sea |
author_facet |
Froese, Rainer Quaas, Martin |
author_sort |
Froese, Rainer |
title |
Three options for rebuilding the cod stock in the eastern Baltic Sea |
title_short |
Three options for rebuilding the cod stock in the eastern Baltic Sea |
title_full |
Three options for rebuilding the cod stock in the eastern Baltic Sea |
title_fullStr |
Three options for rebuilding the cod stock in the eastern Baltic Sea |
title_full_unstemmed |
Three options for rebuilding the cod stock in the eastern Baltic Sea |
title_sort |
three options for rebuilding the cod stock in the eastern baltic sea |
publisher |
Inter Research |
publishDate |
2011 |
url |
https://oceanrep.geomar.de/id/eprint/12042/ https://oceanrep.geomar.de/id/eprint/12042/1/BalticCodMEPS.pdf https://oceanrep.geomar.de/id/eprint/12042/4/m434p197_supp.txt https://doi.org/10.3354/meps09247 |
genre |
Gadus morhua |
genre_facet |
Gadus morhua |
op_relation |
https://oceanrep.geomar.de/id/eprint/12042/1/BalticCodMEPS.pdf https://oceanrep.geomar.de/id/eprint/12042/4/m434p197_supp.txt Froese, R. and Quaas, M. (2011) Three options for rebuilding the cod stock in the eastern Baltic Sea. Open Access Marine Ecology Progress Series, 434 . pp. 197-200. DOI 10.3354/meps09247 <https://doi.org/10.3354/meps09247>. doi:10.3354/meps09247 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3354/meps09247 |
container_title |
Marine Ecology Progress Series |
container_volume |
434 |
container_start_page |
197 |
op_container_end_page |
200 |
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1766005676743589888 |