Assessment of the fishing impact on the silver eel stock in the Baltic using survival analysis
Restoration of the depleted stock of the European eel (Anguilla anguilla (L.)) requires anthropogenic impacts to be quantified, reduced, and controlled. In this article, we assess the impact of the silver eel fishery on the Baltic Coast in Sweden, applying survival analysis to 60 years of mark–recap...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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crcansciencepubl:10.1139/cjfas-2013-0250 2024-06-23T07:45:33+00:00 Assessment of the fishing impact on the silver eel stock in the Baltic using survival analysis Dekker, Willem Sjöberg, Niklas B. Jech, J.M. 2013 http://dx.doi.org/10.1139/cjfas-2013-0250 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2013-0250 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2013-0250 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 70, issue 12, page 1673-1684 ISSN 0706-652X 1205-7533 journal-article 2013 crcansciencepubl https://doi.org/10.1139/cjfas-2013-0250 2024-06-06T04:11:18Z Restoration of the depleted stock of the European eel (Anguilla anguilla (L.)) requires anthropogenic impacts to be quantified, reduced, and controlled. In this article, we assess the impact of the silver eel fishery on the Baltic Coast in Sweden, applying survival analysis to 60 years of mark–recapture experiments, involving 8000 recaptures out of 18 000 releases. The hazard of being recaptured (overall 46%) varies along the coast and declined substantially over the decades. But, most notably, the hazard for the individual diminishes strongly after the first kilometres en route. This individualized hazard disqualifies the more traditional mark–recapture methodology, which assumes random recaptures. We advocate the general use of survival analysis for conventional mark–recapture data. The result of our analysis indicates that the impact of the fishery just prior the 2009 fishing restrictions was in the order of 10%—in itself well within sustainability limits, though only but one of the factors contributing to the mortality in the Baltic Sea. Article in Journal/Newspaper Anguilla anguilla Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 70 12 1673 1684 |
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Open Polar |
collection |
Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
Restoration of the depleted stock of the European eel (Anguilla anguilla (L.)) requires anthropogenic impacts to be quantified, reduced, and controlled. In this article, we assess the impact of the silver eel fishery on the Baltic Coast in Sweden, applying survival analysis to 60 years of mark–recapture experiments, involving 8000 recaptures out of 18 000 releases. The hazard of being recaptured (overall 46%) varies along the coast and declined substantially over the decades. But, most notably, the hazard for the individual diminishes strongly after the first kilometres en route. This individualized hazard disqualifies the more traditional mark–recapture methodology, which assumes random recaptures. We advocate the general use of survival analysis for conventional mark–recapture data. The result of our analysis indicates that the impact of the fishery just prior the 2009 fishing restrictions was in the order of 10%—in itself well within sustainability limits, though only but one of the factors contributing to the mortality in the Baltic Sea. |
author2 |
Jech, J.M. |
format |
Article in Journal/Newspaper |
author |
Dekker, Willem Sjöberg, Niklas B. |
spellingShingle |
Dekker, Willem Sjöberg, Niklas B. Assessment of the fishing impact on the silver eel stock in the Baltic using survival analysis |
author_facet |
Dekker, Willem Sjöberg, Niklas B. |
author_sort |
Dekker, Willem |
title |
Assessment of the fishing impact on the silver eel stock in the Baltic using survival analysis |
title_short |
Assessment of the fishing impact on the silver eel stock in the Baltic using survival analysis |
title_full |
Assessment of the fishing impact on the silver eel stock in the Baltic using survival analysis |
title_fullStr |
Assessment of the fishing impact on the silver eel stock in the Baltic using survival analysis |
title_full_unstemmed |
Assessment of the fishing impact on the silver eel stock in the Baltic using survival analysis |
title_sort |
assessment of the fishing impact on the silver eel stock in the baltic using survival analysis |
publisher |
Canadian Science Publishing |
publishDate |
2013 |
url |
http://dx.doi.org/10.1139/cjfas-2013-0250 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2013-0250 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2013-0250 |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 70, issue 12, page 1673-1684 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjfas-2013-0250 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
70 |
container_issue |
12 |
container_start_page |
1673 |
op_container_end_page |
1684 |
_version_ |
1802640774033047552 |