Environmental effects on recruitment and implications for biological reference points of Eastern Baltic cod (Gadus morhua)
The decline of the Eastern Baltic cod (Gadus morhua) stock from highest to lowest stock levels on record throughout the 1980s and early 1990s was caused by a combination of recruitment failure and increasing fishing pressure at declining stock sizes. The processes driving the reproductive success ar...
Published in: | Journal of Northwest Atlantic Fishery Science |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2009
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Online Access: | https://orbit.dtu.dk/en/publications/085d6806-f559-4471-9202-c39f3165a28b https://doi.org/10.2960/J.v41.m636 http://journal.nafo.int/41/koster/18-koster.html |
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ftdtupubl:oai:pure.atira.dk:publications/085d6806-f559-4471-9202-c39f3165a28b 2024-09-15T18:07:16+00:00 Environmental effects on recruitment and implications for biological reference points of Eastern Baltic cod (Gadus morhua) Köster, Fritz Vinther, Morten MacKenzie, Brian Eero, Margit Plikshs, Maris 2009 https://orbit.dtu.dk/en/publications/085d6806-f559-4471-9202-c39f3165a28b https://doi.org/10.2960/J.v41.m636 http://journal.nafo.int/41/koster/18-koster.html eng eng https://orbit.dtu.dk/en/publications/085d6806-f559-4471-9202-c39f3165a28b info:eu-repo/semantics/restrictedAccess Köster , F , Vinther , M , MacKenzie , B , Eero , M & Plikshs , M 2009 , ' Environmental effects on recruitment and implications for biological reference points of Eastern Baltic cod (Gadus morhua) ' , Journal of Northwest Atlantic Fishery Science , vol. 41 , pp. 205-220 . https://doi.org/10.2960/J.v41.m636 article 2009 ftdtupubl https://doi.org/10.2960/J.v41.m636 2024-06-25T14:31:31Z The decline of the Eastern Baltic cod (Gadus morhua) stock from highest to lowest stock levels on record throughout the 1980s and early 1990s was caused by a combination of recruitment failure and increasing fishing pressure at declining stock sizes. The processes driving the reproductive success are largely understood, but the consequences of these changes for fisheries management are far less evident. This includes doubts about the adequacy of the biological reference points presently used to advise on the stock status, and the need of their revision given that environmental changes have affected stock productivity. Long-term projections suggest that under adverse environmental conditions for reproduction, harvesting at fishing mortality determined as precautionary may not lead to a recovery of the stock to a biomass level considered precautionary. Thus, a revision of either the limit fishing mortality or the limit biomass reference point is indicated. However, an accepted methodology to determine these reference points in situations of changing stock productivity or system carrying capacity does not exist. Environmental conditions affecting recruitment matter not only for the determination of limit reference points, but according to long-term simulations also for target fishing mortalities, being central parts of harvest control rules in several management plans. Article in Journal/Newspaper Gadus morhua Technical University of Denmark: DTU Orbit Journal of Northwest Atlantic Fishery Science 41 205 220 |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
description |
The decline of the Eastern Baltic cod (Gadus morhua) stock from highest to lowest stock levels on record throughout the 1980s and early 1990s was caused by a combination of recruitment failure and increasing fishing pressure at declining stock sizes. The processes driving the reproductive success are largely understood, but the consequences of these changes for fisheries management are far less evident. This includes doubts about the adequacy of the biological reference points presently used to advise on the stock status, and the need of their revision given that environmental changes have affected stock productivity. Long-term projections suggest that under adverse environmental conditions for reproduction, harvesting at fishing mortality determined as precautionary may not lead to a recovery of the stock to a biomass level considered precautionary. Thus, a revision of either the limit fishing mortality or the limit biomass reference point is indicated. However, an accepted methodology to determine these reference points in situations of changing stock productivity or system carrying capacity does not exist. Environmental conditions affecting recruitment matter not only for the determination of limit reference points, but according to long-term simulations also for target fishing mortalities, being central parts of harvest control rules in several management plans. |
format |
Article in Journal/Newspaper |
author |
Köster, Fritz Vinther, Morten MacKenzie, Brian Eero, Margit Plikshs, Maris |
spellingShingle |
Köster, Fritz Vinther, Morten MacKenzie, Brian Eero, Margit Plikshs, Maris Environmental effects on recruitment and implications for biological reference points of Eastern Baltic cod (Gadus morhua) |
author_facet |
Köster, Fritz Vinther, Morten MacKenzie, Brian Eero, Margit Plikshs, Maris |
author_sort |
Köster, Fritz |
title |
Environmental effects on recruitment and implications for biological reference points of Eastern Baltic cod (Gadus morhua) |
title_short |
Environmental effects on recruitment and implications for biological reference points of Eastern Baltic cod (Gadus morhua) |
title_full |
Environmental effects on recruitment and implications for biological reference points of Eastern Baltic cod (Gadus morhua) |
title_fullStr |
Environmental effects on recruitment and implications for biological reference points of Eastern Baltic cod (Gadus morhua) |
title_full_unstemmed |
Environmental effects on recruitment and implications for biological reference points of Eastern Baltic cod (Gadus morhua) |
title_sort |
environmental effects on recruitment and implications for biological reference points of eastern baltic cod (gadus morhua) |
publishDate |
2009 |
url |
https://orbit.dtu.dk/en/publications/085d6806-f559-4471-9202-c39f3165a28b https://doi.org/10.2960/J.v41.m636 http://journal.nafo.int/41/koster/18-koster.html |
genre |
Gadus morhua |
genre_facet |
Gadus morhua |
op_source |
Köster , F , Vinther , M , MacKenzie , B , Eero , M & Plikshs , M 2009 , ' Environmental effects on recruitment and implications for biological reference points of Eastern Baltic cod (Gadus morhua) ' , Journal of Northwest Atlantic Fishery Science , vol. 41 , pp. 205-220 . https://doi.org/10.2960/J.v41.m636 |
op_relation |
https://orbit.dtu.dk/en/publications/085d6806-f559-4471-9202-c39f3165a28b |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.2960/J.v41.m636 |
container_title |
Journal of Northwest Atlantic Fishery Science |
container_volume |
41 |
container_start_page |
205 |
op_container_end_page |
220 |
_version_ |
1810444645326389248 |