Marine heatwaves redistribute pelagic fishing fleets

IF 5.6 1区农林科学 Q1 FISHERIES

Fish and Fisheries Pub Date : 2024-04-04 DOI:10.1111/faf.12828

Nima Farchadi, Heather Welch, Camrin D. Braun, Andrew J. Allyn, Steven J. Bograd, Stephanie Brodie, Elliott L. Hazen, Alex Kerney, Nerea Lezama-Ochoa, Katherine E. Mills, Dylan Pugh, Riley Young-Morse, Rebecca L. Lewison

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Abstract

Marine heatwaves (MHWs) have measurable impacts on marine ecosystems and reliant fisheries and associated communities. However, how MHWs translate to changes in fishing opportunities and the displacement of fishing fleets remains poorly understood. Using fishing vessel tracking data from the automatic identification system (AIS), we developed vessel distribution models for two pelagic fisheries targeting highly migratory species, the U.S. Atlantic longline and Pacific troll fleets, to understand how MHW properties (intensity, size, and duration) influence core fishing grounds and fleet displacement. For both fleets, MHW size had the largest influence on fishing ground area with northern fishing grounds gaining and southern fishing grounds decreasing in area. However, fleet displacement in response to MHWs varied between coasts, as the Atlantic longline fleet displaced farther in southern regions whereas the most northern and southern regions of the Pacific troll fleet shifted farther. Characterizing fishing fleet responses to these anomalous conditions can help identify regional vulnerabilities under future extreme events and aid in supporting climate-readiness and resilience in pelagic fisheries.

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海洋热浪重新分配中上层捕鱼船队

海洋热浪（MHWs）对海洋生态系统和依赖热浪的渔业及相关社区有着可测量的影响。然而，人们对海洋热浪如何转化为捕鱼机会的变化和捕鱼船队的迁移仍然知之甚少。利用来自自动识别系统（AIS）的渔船跟踪数据，我们为两个以高度洄游鱼种为目标的中上层渔业--美国大西洋延绳钓船队和太平洋拖网渔船队建立了渔船分布模型，以了解 MHW 的特性（强度、大小和持续时间）如何影响核心渔场和船队的迁移。对这两个船队而言，MHW 的大小对渔场面积的影响最大，北部渔场面积增加，南部渔场面积减少。然而，不同海岸的船队对 MHWs 的位移反应各不相同，大西洋延绳钓船队在南部地区位移较远，而太平洋拖钓船队在最北部和南部地区位移较远。描述捕捞船队对这些异常情况的反应有助于确定未来极端事件下的区域脆弱性，并有助于支持远洋渔业的气候准备和恢复能力。

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来源期刊

Fish and Fisheries 农林科学-渔业

CiteScore

12.80

自引率

6.00%

发文量

期刊介绍： Fish and Fisheries adopts a broad, interdisciplinary approach to the subject of fish biology and fisheries. It draws contributions in the form of major synoptic papers and syntheses or meta-analyses that lay out new approaches, re-examine existing findings, methods or theory, and discuss papers and commentaries from diverse areas. Focal areas include fish palaeontology, molecular biology and ecology, genetics, biochemistry, physiology, ecology, behaviour, evolutionary studies, conservation, assessment, population dynamics, mathematical modelling, ecosystem analysis and the social, economic and policy aspects of fisheries where they are grounded in a scientific approach. A paper in Fish and Fisheries must draw upon all key elements of the existing literature on a topic, normally have a broad geographic and/or taxonomic scope, and provide general points which make it compelling to a wide range of readers whatever their geographical location. So, in short, we aim to publish articles that make syntheses of old or synoptic, long-term or spatially widespread data, introduce or consolidate fresh concepts or theory, or, in the Ghoti section, briefly justify preliminary, new synoptic ideas. Please note that authors of submissions not meeting this mandate will be directed to the appropriate primary literature.