Improving the Nordmøre-grid system with an aft open top panel bycatch reduction device for juvenile redfish exclusion in shrimp trawls

IF 2.2 2区农林科学 Q2 FISHERIES

Fisheries Research Pub Date : 2025-04-19 DOI:10.1016/j.fishres.2025.107383

T. Araya-Schmidt, S.M. Bayse, P.D. Winger, S. Andrade

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引用次数: 0

Abstract

Shrimp-trawl fisheries often face challenges with bycatch, particularly of juvenile fish species, which can have significant ecological and economic implications. This study evaluated the effectiveness of a low-cost, simple, and innovative open top panel behavioural bycatch reduction device (BRD), positioned aft of the Nordmøre-grid, to reduce juvenile redfish (Sebastes spp.) bycatch while maintaining northern shrimp (Pandalus borealis) catches. Comparative fishing trials were conducted using a twin-trawl setup to compare the experimental trawl against a traditional shrimp trawl. Results demonstrated a significant 54 % reduction in juvenile redfish bycatch for the open top panel trawl, and it consistently retained fewer redfish across all size classes. Underwater video footage revealed that redfish actively swam out of the BRD, leveraging turbulent water behind the Nordmøre-grid. The experimental trawl also introduced minor length-dependent selectivity for shrimp, but maintained similar size frequency distributions and catch rates, showing a non-significant 4.7 % increase in shrimp retention. This study underscores the potential of simple, low-cost behavioural BRDs to address operational challenges in Canadian northern shrimp fisheries.

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改进nordm ø重新网格系统，采用船尾开顶板副渔获物减少装置，用于排除虾拖网中的红鱼幼鱼

虾拖网渔业经常面临副渔获的挑战，特别是幼鱼品种，这可能会产生重大的生态和经济影响。本研究评估了一种低成本、简单、创新的开放式面板行为副渔获减少装置（BRD）的有效性，该装置安装在nordmø重新网格的后部，可以减少红鱼幼鱼（sebases spp.）的副渔获量，同时保持北方虾（Pandalus borealis）的渔获量。使用双拖网装置进行了比较捕捞试验，将实验拖网与传统虾拖网进行比较。结果表明，开顶拖网的副渔获量显著减少了54% %，并且在所有大小类别中都保持较少的红鱼。水下视频片段显示，红鱼积极地游出BRD，利用Nordmøre-grid后面的湍流。实验拖网对虾也引入了较小的长度依赖性选择性，但保持了相似的大小频率分布和捕获率，虾的保留率增加了4.7 %。这项研究强调了简单、低成本的行为brd在解决加拿大北部对虾渔业的运营挑战方面的潜力。

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来源期刊

Fisheries Research 农林科学-渔业

CiteScore

4.50

自引率

16.70%

发文量

294

审稿时长

15 weeks

期刊介绍： This journal provides an international forum for the publication of papers in the areas of fisheries science, fishing technology, fisheries management and relevant socio-economics. The scope covers fisheries in salt, brackish and freshwater systems, and all aspects of associated ecology, environmental aspects of fisheries, and economics. Both theoretical and practical papers are acceptable, including laboratory and field experimental studies relevant to fisheries. Papers on the conservation of exploitable living resources are welcome. Review and Viewpoint articles are also published. As the specified areas inevitably impinge on and interrelate with each other, the approach of the journal is multidisciplinary, and authors are encouraged to emphasise the relevance of their own work to that of other disciplines. The journal is intended for fisheries scientists, biological oceanographers, gear technologists, economists, managers, administrators, policy makers and legislators.