Pseudocollapse and rebuilding of North Sea mackerel (Scomber scombrus)
Abstract Jansen, T. 2014. Pseudocollapse and rebuilding of North Sea mackerel (Scomber scombrus). – ICES Journal of Marine Science, 71: 299–307. The largest observed change in mackerel (Scomber scombrus) abundance in the North Atlantic happened when the so-called “North Sea mackerel” collapsed due t...
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Online Access: | http://dx.doi.org/10.1093/icesjms/fst148 http://academic.oup.com/icesjms/article-pdf/71/2/299/30383866/fst148.pdf |
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croxfordunivpr:10.1093/icesjms/fst148 2024-04-28T08:31:13+00:00 Pseudocollapse and rebuilding of North Sea mackerel (Scomber scombrus) Jansen, Teunis 2013 http://dx.doi.org/10.1093/icesjms/fst148 http://academic.oup.com/icesjms/article-pdf/71/2/299/30383866/fst148.pdf en eng Oxford University Press (OUP) ICES Journal of Marine Science volume 71, issue 2, page 299-307 ISSN 1095-9289 1054-3139 Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2013 croxfordunivpr https://doi.org/10.1093/icesjms/fst148 2024-04-02T08:07:11Z Abstract Jansen, T. 2014. Pseudocollapse and rebuilding of North Sea mackerel (Scomber scombrus). – ICES Journal of Marine Science, 71: 299–307. 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 Oxford University Press ICES Journal of Marine Science 71 2 299 307 |
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Open Polar |
collection |
Oxford University Press |
op_collection_id |
croxfordunivpr |
language |
English |
topic |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography Jansen, Teunis Pseudocollapse and rebuilding of North Sea mackerel (Scomber scombrus) |
topic_facet |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract Jansen, T. 2014. Pseudocollapse and rebuilding of North Sea mackerel (Scomber scombrus). – ICES Journal of Marine Science, 71: 299–307. 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) |
publisher |
Oxford University Press (OUP) |
publishDate |
2013 |
url |
http://dx.doi.org/10.1093/icesjms/fst148 http://academic.oup.com/icesjms/article-pdf/71/2/299/30383866/fst148.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ICES Journal of Marine Science volume 71, issue 2, page 299-307 ISSN 1095-9289 1054-3139 |
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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1797588836171120640 |