Pseudocollapse and rebuilding of North Sea mackerel (Scomber scombrus)
The largest observed change in mackerel (Scomber scombrus) abundance in the North Atlantic happened when the so-called “North Sea mackerel” collapsed due to overfishing. Despite protection, it has remained in a depleted state. Central to this interpretation was that the “North Sea mackerel” was cons...
Published in: | ICES Journal of Marine Science |
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Online Access: | https://zenodo.org/record/8530 https://doi.org/10.1093/icesjms/fst148 |
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ftzenodo:oai:zenodo.org:8530 2023-06-06T11:57:22+02:00 Pseudocollapse and rebuilding of North Sea mackerel (Scomber scombrus) Jansen, Teunis 2014-01-01 https://zenodo.org/record/8530 https://doi.org/10.1093/icesjms/fst148 unknown info:eu-repo/grantAgreement/EC/FP7/264933/ https://zenodo.org/communities/euro-basin https://zenodo.org/communities/ecfunded https://zenodo.org/communities/zenodo https://zenodo.org/record/8530 https://doi.org/10.1093/icesjms/fst148 oai:zenodo.org:8530 info:eu-repo/semantics/openAccess ICES Journal of Marine Science 71(2) 299-307 (2014) distribution environment mackerel migration North Sea overfishing stock collapse stock rebuilding info:eu-repo/semantics/article publication-article 2014 ftzenodo https://doi.org/10.1093/icesjms/fst148 2023-04-13T22:12:18Z The largest observed change in mackerel (Scomber scombrus) abundance in the North Atlantic happened when the so-called “North Sea mackerel” collapsed due to overfishing. Despite protection, it has remained in a depleted state. Central to this interpretation was that the “North Sea mackerel” was considered to be a distinct spawning component. However, a recent study has shown that this is not likely. In the light of this study, a review of the history of mackerel spawning in the North Sea found that the traditional explanation of the collapse did not account for a range of unfavourable environmental changes: high fishing pressure was followed by decreasing temperatures that reduced the spawning migration into the North Sea. This was further supplemented by unfavourable changes in food and wind-induced turbulence. On the population level, this was, therefore, not a local stock collapse, but a southwest shift in spawning distribution combined with a reduction in that portion of the population cline with an affinity for spawning in the northeastern part of the spawning area, including the North Sea. No indication of irreversible genetic or behavioural losses caused by the events was found. The previously unexplained lack of rebuilding of spawning in the North Sea consequently seems related to two environmental factors that have remained unfavourable: (i) zooplankton concentration, and (ii) wind-induced turbulence. Furthermore, the large commercial autumn–winter fishery in the North Sea continues to land unknown quantities of mackerel that have an affinity for spawning in the northeastern part of the spawning area, including the North Sea. Article in Journal/Newspaper North Atlantic Zenodo ICES Journal of Marine Science 71 2 299 307 |
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topic |
distribution environment mackerel migration North Sea overfishing stock collapse stock rebuilding |
spellingShingle |
distribution environment mackerel migration North Sea overfishing stock collapse stock rebuilding Jansen, Teunis Pseudocollapse and rebuilding of North Sea mackerel (Scomber scombrus) |
topic_facet |
distribution environment mackerel migration North Sea overfishing stock collapse stock rebuilding |
description |
The largest observed change in mackerel (Scomber scombrus) abundance in the North Atlantic happened when the so-called “North Sea mackerel” collapsed due to overfishing. Despite protection, it has remained in a depleted state. Central to this interpretation was that the “North Sea mackerel” was considered to be a distinct spawning component. However, a recent study has shown that this is not likely. In the light of this study, a review of the history of mackerel spawning in the North Sea found that the traditional explanation of the collapse did not account for a range of unfavourable environmental changes: high fishing pressure was followed by decreasing temperatures that reduced the spawning migration into the North Sea. This was further supplemented by unfavourable changes in food and wind-induced turbulence. On the population level, this was, therefore, not a local stock collapse, but a southwest shift in spawning distribution combined with a reduction in that portion of the population cline with an affinity for spawning in the northeastern part of the spawning area, including the North Sea. No indication of irreversible genetic or behavioural losses caused by the events was found. The previously unexplained lack of rebuilding of spawning in the North Sea consequently seems related to two environmental factors that have remained unfavourable: (i) zooplankton concentration, and (ii) wind-induced turbulence. Furthermore, the large commercial autumn–winter fishery in the North Sea continues to land unknown quantities of mackerel that have an affinity for spawning in the northeastern part of the spawning area, including the North Sea. |
format |
Article in Journal/Newspaper |
author |
Jansen, Teunis |
author_facet |
Jansen, Teunis |
author_sort |
Jansen, Teunis |
title |
Pseudocollapse and rebuilding of North Sea mackerel (Scomber scombrus) |
title_short |
Pseudocollapse and rebuilding of North Sea mackerel (Scomber scombrus) |
title_full |
Pseudocollapse and rebuilding of North Sea mackerel (Scomber scombrus) |
title_fullStr |
Pseudocollapse and rebuilding of North Sea mackerel (Scomber scombrus) |
title_full_unstemmed |
Pseudocollapse and rebuilding of North Sea mackerel (Scomber scombrus) |
title_sort |
pseudocollapse and rebuilding of north sea mackerel (scomber scombrus) |
publishDate |
2014 |
url |
https://zenodo.org/record/8530 https://doi.org/10.1093/icesjms/fst148 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ICES Journal of Marine Science 71(2) 299-307 (2014) |
op_relation |
info:eu-repo/grantAgreement/EC/FP7/264933/ https://zenodo.org/communities/euro-basin https://zenodo.org/communities/ecfunded https://zenodo.org/communities/zenodo https://zenodo.org/record/8530 https://doi.org/10.1093/icesjms/fst148 oai:zenodo.org:8530 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1093/icesjms/fst148 |
container_title |
ICES Journal of Marine Science |
container_volume |
71 |
container_issue |
2 |
container_start_page |
299 |
op_container_end_page |
307 |
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1767965486231846912 |