When will the eel recover? A full life-cycle model
The European eel population has declined over the past decades in most of its distribution area, and the stock is outside safe biological limits. The EU has taken up the challenge to design a management system that ensures the escapement of 40% of spawning-stock biomass, relative to unexploited, unp...
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Online Access: | https://research.wur.nl/en/publications/when-will-the-eel-recover-a-full-life-cycle-model https://doi.org/10.1093/icesjms/fsm122 |
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ftunivwagenin:oai:library.wur.nl:wurpubs/358989 2024-02-04T09:52:58+01:00 When will the eel recover? A full life-cycle model Astrom, M. Dekker, W. 2007 application/pdf https://research.wur.nl/en/publications/when-will-the-eel-recover-a-full-life-cycle-model https://doi.org/10.1093/icesjms/fsm122 en eng https://edepot.wur.nl/27639 https://research.wur.nl/en/publications/when-will-the-eel-recover-a-full-life-cycle-model doi:10.1093/icesjms/fsm122 info:eu-repo/semantics/restrictedAccess Wageningen University & Research ICES Journal of Marine Science 64 (2007) 7 ISSN: 1054-3139 anguilla-anguilla european eel stock info:eu-repo/semantics/article Article/Letter to editor info:eu-repo/semantics/publishedVersion 2007 ftunivwagenin https://doi.org/10.1093/icesjms/fsm122 2024-01-10T23:24:53Z The European eel population has declined over the past decades in most of its distribution area, and the stock is outside safe biological limits. The EU has taken up the challenge to design a management system that ensures the escapement of 40% of spawning-stock biomass, relative to unexploited, unpolluted circumstances in unobstructed rivers. This ultimately aims to restore the spawning stock to a level at which glass eel production is not impaired, i.e. to restore to full historical glass eel recruitment. To explore the trajectory from the current depleted state to full recruitment recovery, we developed a simple model of stock dynamics, based on a simplified stock- recruitment relationship and the conventional dynamic pool assumptions. Recruitment trajectories under different future fishery regimes are explored, for the medium (one generation time) and long time-span (until full recruitment recovery). Reducing fisheries to zero, recovery is expected within similar to 80 years, whereas under an ultimately sustainable fishing regime of just 10% of the current rate of fishing mortality, recovery may take more than 200 years. Moreover, management regimes, apparently leading to slight recovery of the stock in the coming 5-15 years, might still be unsustainable in the long run. Article in Journal/Newspaper Anguilla anguilla Wageningen UR (University & Research Centre): Digital Library ICES Journal of Marine Science 64 7 1491 1498 |
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Open Polar |
collection |
Wageningen UR (University & Research Centre): Digital Library |
op_collection_id |
ftunivwagenin |
language |
English |
topic |
anguilla-anguilla european eel stock |
spellingShingle |
anguilla-anguilla european eel stock Astrom, M. Dekker, W. When will the eel recover? A full life-cycle model |
topic_facet |
anguilla-anguilla european eel stock |
description |
The European eel population has declined over the past decades in most of its distribution area, and the stock is outside safe biological limits. The EU has taken up the challenge to design a management system that ensures the escapement of 40% of spawning-stock biomass, relative to unexploited, unpolluted circumstances in unobstructed rivers. This ultimately aims to restore the spawning stock to a level at which glass eel production is not impaired, i.e. to restore to full historical glass eel recruitment. To explore the trajectory from the current depleted state to full recruitment recovery, we developed a simple model of stock dynamics, based on a simplified stock- recruitment relationship and the conventional dynamic pool assumptions. Recruitment trajectories under different future fishery regimes are explored, for the medium (one generation time) and long time-span (until full recruitment recovery). Reducing fisheries to zero, recovery is expected within similar to 80 years, whereas under an ultimately sustainable fishing regime of just 10% of the current rate of fishing mortality, recovery may take more than 200 years. Moreover, management regimes, apparently leading to slight recovery of the stock in the coming 5-15 years, might still be unsustainable in the long run. |
format |
Article in Journal/Newspaper |
author |
Astrom, M. Dekker, W. |
author_facet |
Astrom, M. Dekker, W. |
author_sort |
Astrom, M. |
title |
When will the eel recover? A full life-cycle model |
title_short |
When will the eel recover? A full life-cycle model |
title_full |
When will the eel recover? A full life-cycle model |
title_fullStr |
When will the eel recover? A full life-cycle model |
title_full_unstemmed |
When will the eel recover? A full life-cycle model |
title_sort |
when will the eel recover? a full life-cycle model |
publishDate |
2007 |
url |
https://research.wur.nl/en/publications/when-will-the-eel-recover-a-full-life-cycle-model https://doi.org/10.1093/icesjms/fsm122 |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_source |
ICES Journal of Marine Science 64 (2007) 7 ISSN: 1054-3139 |
op_relation |
https://edepot.wur.nl/27639 https://research.wur.nl/en/publications/when-will-the-eel-recover-a-full-life-cycle-model doi:10.1093/icesjms/fsm122 |
op_rights |
info:eu-repo/semantics/restrictedAccess Wageningen University & Research |
op_doi |
https://doi.org/10.1093/icesjms/fsm122 |
container_title |
ICES Journal of Marine Science |
container_volume |
64 |
container_issue |
7 |
container_start_page |
1491 |
op_container_end_page |
1498 |
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1789962952668872704 |