Data from: Shifts in North Sea forage fish productivity and potential fisheries yield
Forage fish populations support large scale fisheries and are key components of marine ecosystems across the world, linking secondary production to higher trophic levels. While climate-induced changes in the North Sea zooplankton community are described and documented in literature, the associated b...
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ftdryad:oai:v1.datadryad.org:10255/dryad.160741 2023-05-15T15:47:59+02:00 Data from: Shifts in North Sea forage fish productivity and potential fisheries yield Clausen, Lotte W. Rindorf, Anna Van Deurs, Mikael Dickey-Collas, Mark Hintzen, Niels T. 2017-11-29T21:02:43Z http://hdl.handle.net/10255/dryad.160741 https://doi.org/10.5061/dryad.tq1f7 unknown doi:10.5061/dryad.tq1f7/1 doi:10.5061/dryad.tq1f7/2 doi:10.5061/dryad.tq1f7/3 doi:10.1111/1365-2664.13038 doi:10.5061/dryad.tq1f7 Clausen LW, Rindorf A, van Deurs M, Dickey-Collas M, Hintzen NT (2018) Shifts in North Sea forage fish productivity and potential fisheries yield. Journal of Applied Ecology 55(3): 1092-1101. http://hdl.handle.net/10255/dryad.160741 maximum sustianable yield functional complimentarity bottom-up effect small pelagic fisheries fisheries regime shift recruitment growth Article 2017 ftdryad https://doi.org/10.5061/dryad.tq1f7 https://doi.org/10.5061/dryad.tq1f7/1 https://doi.org/10.5061/dryad.tq1f7/2 https://doi.org/10.5061/dryad.tq1f7/3 https://doi.org/10.1111/1365-2664.13038 2020-01-01T15:58:45Z Forage fish populations support large scale fisheries and are key components of marine ecosystems across the world, linking secondary production to higher trophic levels. While climate-induced changes in the North Sea zooplankton community are described and documented in literature, the associated bottom-up effects and consequences for fisheries remain largely unidentified. We investigated the temporal development in forage fish productivity and the associated influence on fisheries yield of herring, sprat, Norway pout and sandeel in the North Sea. Using principal component analysis, we analysed 40 years of recruitment success and growth proxies to reveal changes in productivity and patterns of synchroneity across stocks (i.e. functional complementarity). The relationship between forage fish production and Calanus finmarchicus (an indicator of climate change) was also analysed. We used a population model to demonstrate how observed shifts in productivity affected total forage fish biomass and fisheries yield. The productivity of North Sea forage fish changed around 1993 from a higher average productivity to lower average productivity. During the higher productivity period, stocks displayed a covariance structure indicative of functional complementarity. Calanus finmarchicus was positively correlated to forage fish recruitment, however, for growth, the direction of the response differed between species and time periods. Maximum sustainable yield (MSY) and the associated fishing mortality (Fmsy) decreased by 33%–68% and 26%–64%, respectively, between the higher and lower productivity periods. Synthesis and applications. The results demonstrate that fisheries reference points for short-lived planktivorous species are highly dynamic and respond rapidly to changes in system productivity. Furthermore, from an ecosystem-based fisheries management perspective, a link between functional complementarity and productivity, indicates that ecosystem resilience may decline with productivity. Based on this, we advise that system productivity, perhaps monitored as forage fish growth, becomes an integral part of management reference points; in both single species and ecosystem contexts. However, to retain social license of biological advice when fish catch opportunities are reduced, it is crucial that shifts in productivity are thoroughly documented and made apparent to managers and stakeholders. Article in Journal/Newspaper Calanus finmarchicus Dryad Digital Repository (Duke University) Norway |
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Open Polar |
collection |
Dryad Digital Repository (Duke University) |
op_collection_id |
ftdryad |
language |
unknown |
topic |
maximum sustianable yield functional complimentarity bottom-up effect small pelagic fisheries fisheries regime shift recruitment growth |
spellingShingle |
maximum sustianable yield functional complimentarity bottom-up effect small pelagic fisheries fisheries regime shift recruitment growth Clausen, Lotte W. Rindorf, Anna Van Deurs, Mikael Dickey-Collas, Mark Hintzen, Niels T. Data from: Shifts in North Sea forage fish productivity and potential fisheries yield |
topic_facet |
maximum sustianable yield functional complimentarity bottom-up effect small pelagic fisheries fisheries regime shift recruitment growth |
description |
Forage fish populations support large scale fisheries and are key components of marine ecosystems across the world, linking secondary production to higher trophic levels. While climate-induced changes in the North Sea zooplankton community are described and documented in literature, the associated bottom-up effects and consequences for fisheries remain largely unidentified. We investigated the temporal development in forage fish productivity and the associated influence on fisheries yield of herring, sprat, Norway pout and sandeel in the North Sea. Using principal component analysis, we analysed 40 years of recruitment success and growth proxies to reveal changes in productivity and patterns of synchroneity across stocks (i.e. functional complementarity). The relationship between forage fish production and Calanus finmarchicus (an indicator of climate change) was also analysed. We used a population model to demonstrate how observed shifts in productivity affected total forage fish biomass and fisheries yield. The productivity of North Sea forage fish changed around 1993 from a higher average productivity to lower average productivity. During the higher productivity period, stocks displayed a covariance structure indicative of functional complementarity. Calanus finmarchicus was positively correlated to forage fish recruitment, however, for growth, the direction of the response differed between species and time periods. Maximum sustainable yield (MSY) and the associated fishing mortality (Fmsy) decreased by 33%–68% and 26%–64%, respectively, between the higher and lower productivity periods. Synthesis and applications. The results demonstrate that fisheries reference points for short-lived planktivorous species are highly dynamic and respond rapidly to changes in system productivity. Furthermore, from an ecosystem-based fisheries management perspective, a link between functional complementarity and productivity, indicates that ecosystem resilience may decline with productivity. Based on this, we advise that system productivity, perhaps monitored as forage fish growth, becomes an integral part of management reference points; in both single species and ecosystem contexts. However, to retain social license of biological advice when fish catch opportunities are reduced, it is crucial that shifts in productivity are thoroughly documented and made apparent to managers and stakeholders. |
format |
Article in Journal/Newspaper |
author |
Clausen, Lotte W. Rindorf, Anna Van Deurs, Mikael Dickey-Collas, Mark Hintzen, Niels T. |
author_facet |
Clausen, Lotte W. Rindorf, Anna Van Deurs, Mikael Dickey-Collas, Mark Hintzen, Niels T. |
author_sort |
Clausen, Lotte W. |
title |
Data from: Shifts in North Sea forage fish productivity and potential fisheries yield |
title_short |
Data from: Shifts in North Sea forage fish productivity and potential fisheries yield |
title_full |
Data from: Shifts in North Sea forage fish productivity and potential fisheries yield |
title_fullStr |
Data from: Shifts in North Sea forage fish productivity and potential fisheries yield |
title_full_unstemmed |
Data from: Shifts in North Sea forage fish productivity and potential fisheries yield |
title_sort |
data from: shifts in north sea forage fish productivity and potential fisheries yield |
publishDate |
2017 |
url |
http://hdl.handle.net/10255/dryad.160741 https://doi.org/10.5061/dryad.tq1f7 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Calanus finmarchicus |
genre_facet |
Calanus finmarchicus |
op_relation |
doi:10.5061/dryad.tq1f7/1 doi:10.5061/dryad.tq1f7/2 doi:10.5061/dryad.tq1f7/3 doi:10.1111/1365-2664.13038 doi:10.5061/dryad.tq1f7 Clausen LW, Rindorf A, van Deurs M, Dickey-Collas M, Hintzen NT (2018) Shifts in North Sea forage fish productivity and potential fisheries yield. Journal of Applied Ecology 55(3): 1092-1101. http://hdl.handle.net/10255/dryad.160741 |
op_doi |
https://doi.org/10.5061/dryad.tq1f7 https://doi.org/10.5061/dryad.tq1f7/1 https://doi.org/10.5061/dryad.tq1f7/2 https://doi.org/10.5061/dryad.tq1f7/3 https://doi.org/10.1111/1365-2664.13038 |
_version_ |
1766382975058968576 |