Spatio-Temporal Variability of the North Sea Cod Recruitment in Relation to Temperature and Zooplankton
The North Sea cod (Gadus morhua, L.) stock has continuously declined over the past four decades linked with overfishing and climate change. Changes in stock structure due to overfishing have made the stock largely dependent on its recruitment success, which greatly relies on environmental conditions...
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ftarchimer:oai:archimer.ifremer.fr:29250 2023-05-15T15:48:03+02:00 Spatio-Temporal Variability of the North Sea Cod Recruitment in Relation to Temperature and Zooplankton Nicolas, Delphine Rochette, Sebastien Llope, Marcos Licandro, Priscilla 2014-02 application/pdf https://archimer.ifremer.fr/doc/00181/29250/27654.pdf https://doi.org/10.1371/journal.pone.0088447 https://archimer.ifremer.fr/doc/00181/29250/ eng eng Public Library Science info:eu-repo/grantAgreement/EC/FP7/266445/EU//VECTORS https://archimer.ifremer.fr/doc/00181/29250/27654.pdf doi:10.1371/journal.pone.0088447 https://archimer.ifremer.fr/doc/00181/29250/ 2014 Nicolas et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. info:eu-repo/semantics/openAccess restricted use CC-BY Plos One (1932-6203) (Public Library Science), 2014-02 , Vol. 9 , N. 2 , P. e88447 text Publication info:eu-repo/semantics/article 2014 ftarchimer https://doi.org/10.1371/journal.pone.0088447 2021-09-23T20:24:10Z The North Sea cod (Gadus morhua, L.) stock has continuously declined over the past four decades linked with overfishing and climate change. Changes in stock structure due to overfishing have made the stock largely dependent on its recruitment success, which greatly relies on environmental conditions. Here we focus on the spatio-temporal variability of cod recruitment in an effort to detect changes during the critical early life stages. Using International Bottom Trawl Survey (IBTS) data from 1974 to 2011, a major spatio-temporal change in the distribution of cod recruits was identified in the late 1990s, characterized by a pronounced decrease in the central and southeastern North Sea stock. Other minor spatial changes were also recorded in the mid-1980s and early 1990s. We tested whether the observed changes in recruits distribution could be related with direct (i. e. temperature) and/or indirect (i. e. changes in the quantity and quality of zooplankton prey) effects of climate variability. The analyses were based on spatially-resolved time series, i. e. sea surface temperature (SST) from the Hadley Center and zooplankton records from the Continuous Plankton Recorder Survey. We showed that spring SST increase was the main driver for the most recent decrease in cod recruitment. The late 1990s were also characterized by relatively low total zooplankton biomass, particularly of energy-rich zooplankton such as the copepod Calanus finmarchicus, which have further contributed to the decline of North Sea cod recruitment. Long-term spatially-resolved observations were used to produce regional distribution models that could further be used to predict the abundance of North Sea cod recruits based on temperature and zooplankton food availability. Article in Journal/Newspaper Calanus finmarchicus Gadus morhua Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) PLoS ONE 9 2 e88447 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
description |
The North Sea cod (Gadus morhua, L.) stock has continuously declined over the past four decades linked with overfishing and climate change. Changes in stock structure due to overfishing have made the stock largely dependent on its recruitment success, which greatly relies on environmental conditions. Here we focus on the spatio-temporal variability of cod recruitment in an effort to detect changes during the critical early life stages. Using International Bottom Trawl Survey (IBTS) data from 1974 to 2011, a major spatio-temporal change in the distribution of cod recruits was identified in the late 1990s, characterized by a pronounced decrease in the central and southeastern North Sea stock. Other minor spatial changes were also recorded in the mid-1980s and early 1990s. We tested whether the observed changes in recruits distribution could be related with direct (i. e. temperature) and/or indirect (i. e. changes in the quantity and quality of zooplankton prey) effects of climate variability. The analyses were based on spatially-resolved time series, i. e. sea surface temperature (SST) from the Hadley Center and zooplankton records from the Continuous Plankton Recorder Survey. We showed that spring SST increase was the main driver for the most recent decrease in cod recruitment. The late 1990s were also characterized by relatively low total zooplankton biomass, particularly of energy-rich zooplankton such as the copepod Calanus finmarchicus, which have further contributed to the decline of North Sea cod recruitment. Long-term spatially-resolved observations were used to produce regional distribution models that could further be used to predict the abundance of North Sea cod recruits based on temperature and zooplankton food availability. |
format |
Article in Journal/Newspaper |
author |
Nicolas, Delphine Rochette, Sebastien Llope, Marcos Licandro, Priscilla |
spellingShingle |
Nicolas, Delphine Rochette, Sebastien Llope, Marcos Licandro, Priscilla Spatio-Temporal Variability of the North Sea Cod Recruitment in Relation to Temperature and Zooplankton |
author_facet |
Nicolas, Delphine Rochette, Sebastien Llope, Marcos Licandro, Priscilla |
author_sort |
Nicolas, Delphine |
title |
Spatio-Temporal Variability of the North Sea Cod Recruitment in Relation to Temperature and Zooplankton |
title_short |
Spatio-Temporal Variability of the North Sea Cod Recruitment in Relation to Temperature and Zooplankton |
title_full |
Spatio-Temporal Variability of the North Sea Cod Recruitment in Relation to Temperature and Zooplankton |
title_fullStr |
Spatio-Temporal Variability of the North Sea Cod Recruitment in Relation to Temperature and Zooplankton |
title_full_unstemmed |
Spatio-Temporal Variability of the North Sea Cod Recruitment in Relation to Temperature and Zooplankton |
title_sort |
spatio-temporal variability of the north sea cod recruitment in relation to temperature and zooplankton |
publisher |
Public Library Science |
publishDate |
2014 |
url |
https://archimer.ifremer.fr/doc/00181/29250/27654.pdf https://doi.org/10.1371/journal.pone.0088447 https://archimer.ifremer.fr/doc/00181/29250/ |
genre |
Calanus finmarchicus Gadus morhua |
genre_facet |
Calanus finmarchicus Gadus morhua |
op_source |
Plos One (1932-6203) (Public Library Science), 2014-02 , Vol. 9 , N. 2 , P. e88447 |
op_relation |
info:eu-repo/grantAgreement/EC/FP7/266445/EU//VECTORS https://archimer.ifremer.fr/doc/00181/29250/27654.pdf doi:10.1371/journal.pone.0088447 https://archimer.ifremer.fr/doc/00181/29250/ |
op_rights |
2014 Nicolas et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. info:eu-repo/semantics/openAccess restricted use |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1371/journal.pone.0088447 |
container_title |
PLoS ONE |
container_volume |
9 |
container_issue |
2 |
container_start_page |
e88447 |
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