Adding to the mix –Challenges of mixed-fisheries management in the North Sea under climate change and technical interactions

Type Article
Date 2023-08
Language English
Author(s) Kühn Bernhard1, Kempf Alexander1, Brunel Thomas2, Cole Harriet3, Mathis Moritz4, Sys Klaas5, Trijoulet Vanessa6, Vermard YouenORCID7, Taylor Marc1
Affiliation(s) 1 : Thünen Institute of Sea Fisheries, Bremerhaven, Germany
2 : Wageningen Marine Research, IJmuiden, The Netherlands
3 : Marine Laboratory, Marine Scotland Science, Aberdeen, UK
4 : Helmholtz-Zentrum Hereon, Geesthacht, Germany
5 : Research Institute for Agriculture, Fisheries and Food, Ostend, Belgium
6 : National Institute of Aquatic Resources, Technical University of Denmark, Kongens Lyngby, Denmark
7 : Ifremer, EMH, Nantes, France
Source Fisheries Management And Ecology (0969-997X) (Wiley / Blackwell), 2023-08 , Vol. 30 , N. 4 , P. 360-377
DOI 10.1111/fme.12629
WOS© Times Cited 1
Keyword(s) bioeconomic model, climate change, EU landing obligation, FLBEIA, Pretty Good Yield

Technical interactions (multiple fleets fishing multiple species with various gears, as either target or bycatch), bycatch regulations through a landing obligation, and biological and economic effects of climate change, affecting fisheries yield and profits, provide a challenge for demersal mixed fisheries of the North Sea. A multi-stock, multi-fleet, bioeconomic model was used to understand management options under these combined influences. Scenarios considered climate change effects on recruitment of three main gadoid stocks (cod – Gadus morhua, saithe – Pollachius virens, whiting – Merlangius merlangus), possible future developments of fuel and fish prices, and strict implementation of a landing obligation. The latter leads to decreased yield and profits in the short term due to increased choke effects, mainly of North Sea cod, being influenced by climate-induced productivity changes. Allowing fishing above FMSY, but within sustainable limits, or limiting year-to-year quota changes, could help buffer initial losses at the expense of decreased profits in the mid- to long-term. Economic performance of individual fleets was linked to their main target's stock status, cost structure, and fuel and fish prices. The results highlight a need to consider both biological and economic consequences of climate change in the management of mixed fisheries.

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Kühn Bernhard, Kempf Alexander, Brunel Thomas, Cole Harriet, Mathis Moritz, Sys Klaas, Trijoulet Vanessa, Vermard Youen, Taylor Marc (2023). Adding to the mix –Challenges of mixed-fisheries management in the North Sea under climate change and technical interactions. Fisheries Management And Ecology, 30(4), 360-377. Publisher's official version : , Open Access version :