气候变化和技术相互作用下北海混合渔业管理的挑战

IF 2 3区 农林科学 Q2 FISHERIES
Bernhard Kühn, Alexander Kempf, Thomas Brunel, Harriet Cole, Moritz Mathis, Klaas Sys, Vanessa Trijoulet, Youen Vermard, Marc Taylor
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引用次数: 1

摘要

技术互动(多个船队用不同的渔具捕捞多个物种,作为目标或副渔获物)、通过登陆义务制定的副渔获物法规,以及影响渔业产量和利润的气候变化的生物和经济影响,对北海的底底混合渔业构成了挑战。采用多种群、多船队的生物经济模型来了解在这些综合影响下的管理方案。各种情景考虑了气候变化对三种主要鱼类(鳕鱼-加德斯·莫尔华,塞德鱼-波拉基乌斯·维伦斯,白鲑-默兰乌斯)的增收的影响,燃料和鱼类价格未来可能的发展,以及严格执行登陆义务。后者导致短期内产量和利润下降,主要是北海鳕鱼受到气候导致的生产力变化的影响,导致扼流带效应增加。允许在渔业最高限定值之上进行捕捞,但在可持续范围内,或限制每年的配额变化,可以帮助缓冲初期的损失,但代价是中长期利润的减少。个别船队的经济表现与其主要目标的存量状况、成本结构以及燃料和鱼类价格有关。结果突出表明,在混合渔业管理中需要考虑气候变化的生物和经济后果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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

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 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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来源期刊
Fisheries Management and Ecology
Fisheries Management and Ecology 农林科学-渔业
CiteScore
3.80
自引率
5.00%
发文量
77
审稿时长
12-24 weeks
期刊介绍: Fisheries Management and Ecology is a journal with an international perspective. It presents papers that cover all aspects of the management, ecology and conservation of inland, estuarine and coastal fisheries. The Journal aims to: foster an understanding of the maintenance, development and management of the conditions under which fish populations and communities thrive, and how they and their habitat can be conserved and enhanced; promote a thorough understanding of the dual nature of fisheries as valuable resources exploited for food, recreational and commercial purposes and as pivotal indicators of aquatic habitat quality and conservation status; help fisheries managers focus upon policy, management, operational, conservation and ecological issues; assist fisheries ecologists become more aware of the needs of managers for information, techniques, tools and concepts; integrate ecological studies with all aspects of management; ensure that the conservation of fisheries and their environments is a recurring theme in fisheries and aquatic management.
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