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Which factors can affect the productivity and dynamics of cod stocks in the Baltic Sea, Kattegat and Skagerrak?

Bryhn, Andreas and Bergek, Sara and Bergström, Ulf and Casini, Michele and Dahlgren, Elin and Ek, Caroline and Hjelm, Joakim and Königson, Sara and Ljungberg, Peter and Lundström, Karl and Lunneryd, Sven-Gunnar and Ovegård, Maria and Sköld, Mattias and Valentinsson, Daniel and Vitale, Francesca and Wennhage, Håkan (2022). Which factors can affect the productivity and dynamics of cod stocks in the Baltic Sea, Kattegat and Skagerrak? Ocean and Coastal Management. 223 , 106154
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Abstract

Stocks of Atlantic cod (Gadus morhua) in the Baltic Sea, Kattegat and Skagerrak (N. Europe) have been strongly exploited for decades bringing them into an enduringly depleted status. Scientific cod stock related advice for targeted and mixed fisheries is provided on an annual basis by the International Council for Exploration of the Sea. This advice forms a basis for ministerial decisions on, e.g., the total allowable catch and management plans. Despite measures to reduce fishing-induced mortality of cod, such as catch and effort restrictions, increased gear selectivity, closed areas and seasons, clear signs of recovery are yet to be seen. Thus, traditional advice for the management of these stocks may have to be complemented by advice on supporting measures focusing on other pressures hampering the recovery of cod. The present study elaborates on potential supportive measures for cod stock recovery in the Baltic Sea, Kattegat, and Skagerrak (including local populations where applicable), based on current knowledge. The list of measures presented here is the outcome of in-depth discussions on the state-of-the-art knowledge, among cod experts and further with stakeholders with the aim to follow principles of ecosystem-based fisheries management. Following the identification of different pressures on and prerequisites for the separate stocks, the listed measures differ between stocks and include cod bycatch mortality reduction, alterations in fisheries affecting food sources for cod, restocking, protection of juvenile habitats, and reduced predation. The literature review and the list of measures are intended to provide decision-support for managers and policymakers aiming to provide conditions for the cod stocks to recover.

Authors/Creators:Bryhn, Andreas and Bergek, Sara and Bergström, Ulf and Casini, Michele and Dahlgren, Elin and Ek, Caroline and Hjelm, Joakim and Königson, Sara and Ljungberg, Peter and Lundström, Karl and Lunneryd, Sven-Gunnar and Ovegård, Maria and Sköld, Mattias and Valentinsson, Daniel and Vitale, Francesca and Wennhage, Håkan
Title:Which factors can affect the productivity and dynamics of cod stocks in the Baltic Sea, Kattegat and Skagerrak?
Series Name/Journal:Ocean and Coastal Management
Year of publishing :2022
Volume:223
Article number:106154
Number of Pages:11
ISSN:0964-5691
Language:English
Publication Type:Article Review/Survey
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Fish and Aquacultural Science
Keywords:Cod, Gadus morhua, Baltic sea, Kattegat, Skagerrak, Adaptive management
URN:NBN:urn:nbn:se:slu:epsilon-p-116732
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-116732
Additional ID:
Type of IDID
DOI10.1016/j.ocecoaman.2022.106154
ID Code:27617
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Department of Aquatic Resources
Deposited By: SLUpub Connector
Deposited On:26 Apr 2022 08:26
Metadata Last Modified:26 Apr 2022 08:31

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