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

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 fi...

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Bibliographic Details
Published in:Fisheries Management and Ecology
Main Authors: Kühn, Bernhard, Kempf, Alexander, Brunel, Thomas, Cole, Harriet, Mathis, Moritz, Sys, Klaas, Trijoulet, Vanessa, Vermard, Youen, Taylor, Marc
Format: Article in Journal/Newspaper
Language:English
Published: 2023
Subjects:
Bioeconomic model
Climate change
EU landing obligation
FLBEIA
Pretty Good Yield
/dk/atira/pure/sustainabledevelopmentgoals/climate_action
name=SDG 13 - Climate Action
/dk/atira/pure/sustainabledevelopmentgoals/life_below_water
name=SDG 14 - Life Below Water
Gadus morhua
Online Access:https://orbit.dtu.dk/en/publications/40bfcbe0-1d91-468c-8f39-d60badbcfca1
https://doi.org/10.1111/fme.12629
https://backend.orbit.dtu.dk/ws/files/328854904/Fisheries_Management_Eco_2023_K_hn_Adding_to_the_mix_Challenges_of_mixed_fisheries_management_in_the_North_Sea.pdf
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Summary: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 F MSY , 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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