Climate, fishing and cod
International audience While a few North Atlantic cod stocks are stable, none have increased and many have declined in recent years. Although overfishing is the main cause of most observed declines, this study shows that in some regions, climate by its influence on plankton may exert a strong contro...
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ftccsdartic:oai:HAL:hal-00761916v1 2023-05-15T15:27:45+02:00 Climate, fishing and cod Beaugrand, Gregory Kirby, R. Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 (LOG) Centre National de la Recherche Scientifique (CNRS)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Institut national des sciences de l'Univers (INSU - CNRS) 2010-04 https://hal.archives-ouvertes.fr/hal-00761916 https://doi.org/10.1111/j.1365-2486.2009.02063.x en eng HAL CCSD Wiley info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-2486.2009.02063.x hal-00761916 https://hal.archives-ouvertes.fr/hal-00761916 doi:10.1111/j.1365-2486.2009.02063.x ISSN: 1354-1013 EISSN: 1365-2486 Global Change Biology https://hal.archives-ouvertes.fr/hal-00761916 Global Change Biology, Wiley, 2010, 16 (4), pp.1268-1280. ⟨10.1111/j.1365-2486.2009.02063.x⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2010 ftccsdartic https://doi.org/10.1111/j.1365-2486.2009.02063.x 2021-12-12T05:37:38Z International audience While a few North Atlantic cod stocks are stable, none have increased and many have declined in recent years. Although overfishing is the main cause of most observed declines, this study shows that in some regions, climate by its influence on plankton may exert a strong control on cod stocks, complicating the management of this species that often assumes a constant carrying capacity. First, we investigate the likely drivers of changes in the cod stock in the North Sea by evaluating the potential relationships between climate, plankton and cod. We do this by deriving a Plankton Index that reflects the quality and quantity of plankton food available for larval cod. We show that this Plankton Index explains 46.24% of the total variance in cod recruitment and 68.89% of the variance in total cod biomass. Because the effects of climate act predominantly through plankton during the larval stage of cod development, our results indicate a pronounced sensitivity of cod stocks to climate at the warmer, southern edge of their distribution, for example in the North Sea. Our analyses also reveal for the first time, that at a large basin scale, the abundance of Calanus finmarchicus is associated with a high probability of cod occurrence, whereas the genus Pseudocalanus appears less important. Ecosystem-based fisheries management (EBFM) generally considers the effect of fishing on the ecosystem and not the effect of climate-induced changes in the ecosystem state for the living resources. These results suggest that EBFM must consider the position of a stock within its ecological niche, the direct effects of climate and the influence of climate on the trophodynamics of the ecosystem Article in Journal/Newspaper atlantic cod Calanus finmarchicus North Atlantic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Global Change Biology 16 4 1268 1280 |
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Open Polar |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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ftccsdartic |
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English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
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[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Beaugrand, Gregory Kirby, R. Climate, fishing and cod |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience While a few North Atlantic cod stocks are stable, none have increased and many have declined in recent years. Although overfishing is the main cause of most observed declines, this study shows that in some regions, climate by its influence on plankton may exert a strong control on cod stocks, complicating the management of this species that often assumes a constant carrying capacity. First, we investigate the likely drivers of changes in the cod stock in the North Sea by evaluating the potential relationships between climate, plankton and cod. We do this by deriving a Plankton Index that reflects the quality and quantity of plankton food available for larval cod. We show that this Plankton Index explains 46.24% of the total variance in cod recruitment and 68.89% of the variance in total cod biomass. Because the effects of climate act predominantly through plankton during the larval stage of cod development, our results indicate a pronounced sensitivity of cod stocks to climate at the warmer, southern edge of their distribution, for example in the North Sea. Our analyses also reveal for the first time, that at a large basin scale, the abundance of Calanus finmarchicus is associated with a high probability of cod occurrence, whereas the genus Pseudocalanus appears less important. Ecosystem-based fisheries management (EBFM) generally considers the effect of fishing on the ecosystem and not the effect of climate-induced changes in the ecosystem state for the living resources. These results suggest that EBFM must consider the position of a stock within its ecological niche, the direct effects of climate and the influence of climate on the trophodynamics of the ecosystem |
author2 |
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 (LOG) Centre National de la Recherche Scientifique (CNRS)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Institut national des sciences de l'Univers (INSU - CNRS) |
format |
Article in Journal/Newspaper |
author |
Beaugrand, Gregory Kirby, R. |
author_facet |
Beaugrand, Gregory Kirby, R. |
author_sort |
Beaugrand, Gregory |
title |
Climate, fishing and cod |
title_short |
Climate, fishing and cod |
title_full |
Climate, fishing and cod |
title_fullStr |
Climate, fishing and cod |
title_full_unstemmed |
Climate, fishing and cod |
title_sort |
climate, fishing and cod |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://hal.archives-ouvertes.fr/hal-00761916 https://doi.org/10.1111/j.1365-2486.2009.02063.x |
genre |
atlantic cod Calanus finmarchicus North Atlantic |
genre_facet |
atlantic cod Calanus finmarchicus North Atlantic |
op_source |
ISSN: 1354-1013 EISSN: 1365-2486 Global Change Biology https://hal.archives-ouvertes.fr/hal-00761916 Global Change Biology, Wiley, 2010, 16 (4), pp.1268-1280. ⟨10.1111/j.1365-2486.2009.02063.x⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-2486.2009.02063.x hal-00761916 https://hal.archives-ouvertes.fr/hal-00761916 doi:10.1111/j.1365-2486.2009.02063.x |
op_doi |
https://doi.org/10.1111/j.1365-2486.2009.02063.x |
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Global Change Biology |
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16 |
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4 |
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1268 |
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1280 |
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