Depleted marine fish stocks and ecosystem-based management: on the road to recovery, we need to be precautionary
Depleted marine fish stocks and ecosystem-based management: on the road to recovery, we need to be precautionary. -ICES Journal of Marine Science, doi:10.1093/icesjms/fsq158. Precautionary management for fish stocks in need of recovery requires that likely stock increases can be distinguished from m...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.1054.1087 2023-05-15T16:19:14+02:00 Depleted marine fish stocks and ecosystem-based management: on the road to recovery, we need to be precautionary Anna Gårdmark Anders Nielsen Jens Floeter Christian Möllmann A Gårdmark Floeter A Nielsen J Möllmann C The Pennsylvania State University CiteSeerX Archives 2011 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1054.1087 http://spicosa-inline.databases.eucc-d.de/files/documents/00001085_depleted%20marine%20fish%20stocksand%20ecosystem%20based%20management.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1054.1087 http://spicosa-inline.databases.eucc-d.de/files/documents/00001085_depleted%20marine%20fish%20stocksand%20ecosystem%20based%20management.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://spicosa-inline.databases.eucc-d.de/files/documents/00001085_depleted%20marine%20fish%20stocksand%20ecosystem%20based%20management.pdf text 2011 ftciteseerx 2020-04-12T00:19:14Z Depleted marine fish stocks and ecosystem-based management: on the road to recovery, we need to be precautionary. -ICES Journal of Marine Science, doi:10.1093/icesjms/fsq158. Precautionary management for fish stocks in need of recovery requires that likely stock increases can be distinguished from model artefacts and that the uncertainty of stock status can be handled. Yet, ICES stock assessments are predominantly deterministic and many EC management plans are designed for deterministic advice. Using the eastern Baltic cod (Gadus morhua) stock as an example, we show how deterministic scientific advice can lead to illusive certainty of a rapid stock recovery and management decisions taken in unawareness of large uncertainties in stock status. By (i) performing sensitivity analyses of key assessment model assumptions, (ii) quantifying the uncertainty of the estimates due to data uncertainty, and (iii) developing alternative stock and ecosystem indicators, we demonstrate that estimates of recent fishing mortality and recruitment of this stock were highly uncertain and show that these uncertainties are crucial when combined with management plans based on fixed reference points of fishing mortality. We therefore call for fisheries management that does not neglect uncertainty. To this end, we outline a four-step approach to handle uncertainty of stock status in advice and management. We argue that it is time to use these four steps towards an ecosystem-based approach to fisheries management. Text Gadus morhua Unknown |
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English |
description |
Depleted marine fish stocks and ecosystem-based management: on the road to recovery, we need to be precautionary. -ICES Journal of Marine Science, doi:10.1093/icesjms/fsq158. Precautionary management for fish stocks in need of recovery requires that likely stock increases can be distinguished from model artefacts and that the uncertainty of stock status can be handled. Yet, ICES stock assessments are predominantly deterministic and many EC management plans are designed for deterministic advice. Using the eastern Baltic cod (Gadus morhua) stock as an example, we show how deterministic scientific advice can lead to illusive certainty of a rapid stock recovery and management decisions taken in unawareness of large uncertainties in stock status. By (i) performing sensitivity analyses of key assessment model assumptions, (ii) quantifying the uncertainty of the estimates due to data uncertainty, and (iii) developing alternative stock and ecosystem indicators, we demonstrate that estimates of recent fishing mortality and recruitment of this stock were highly uncertain and show that these uncertainties are crucial when combined with management plans based on fixed reference points of fishing mortality. We therefore call for fisheries management that does not neglect uncertainty. To this end, we outline a four-step approach to handle uncertainty of stock status in advice and management. We argue that it is time to use these four steps towards an ecosystem-based approach to fisheries management. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Anna Gårdmark Anders Nielsen Jens Floeter Christian Möllmann A Gårdmark Floeter A Nielsen J Möllmann C |
spellingShingle |
Anna Gårdmark Anders Nielsen Jens Floeter Christian Möllmann A Gårdmark Floeter A Nielsen J Möllmann C Depleted marine fish stocks and ecosystem-based management: on the road to recovery, we need to be precautionary |
author_facet |
Anna Gårdmark Anders Nielsen Jens Floeter Christian Möllmann A Gårdmark Floeter A Nielsen J Möllmann C |
author_sort |
Anna Gårdmark |
title |
Depleted marine fish stocks and ecosystem-based management: on the road to recovery, we need to be precautionary |
title_short |
Depleted marine fish stocks and ecosystem-based management: on the road to recovery, we need to be precautionary |
title_full |
Depleted marine fish stocks and ecosystem-based management: on the road to recovery, we need to be precautionary |
title_fullStr |
Depleted marine fish stocks and ecosystem-based management: on the road to recovery, we need to be precautionary |
title_full_unstemmed |
Depleted marine fish stocks and ecosystem-based management: on the road to recovery, we need to be precautionary |
title_sort |
depleted marine fish stocks and ecosystem-based management: on the road to recovery, we need to be precautionary |
publishDate |
2011 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1054.1087 http://spicosa-inline.databases.eucc-d.de/files/documents/00001085_depleted%20marine%20fish%20stocksand%20ecosystem%20based%20management.pdf |
genre |
Gadus morhua |
genre_facet |
Gadus morhua |
op_source |
http://spicosa-inline.databases.eucc-d.de/files/documents/00001085_depleted%20marine%20fish%20stocksand%20ecosystem%20based%20management.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1054.1087 http://spicosa-inline.databases.eucc-d.de/files/documents/00001085_depleted%20marine%20fish%20stocksand%20ecosystem%20based%20management.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766005593613533184 |