Effects of Gillnet Mesh Size on the Size Selectivity and Catch Efficiency for Two Rockfish in the Artificial Reef Area of Shandong Province, China

IF 2 3区农林科学 Q2 FISHERIES

Fisheries Management and Ecology Pub Date : 2024-11-22 DOI:10.1111/fme.12764

Liyou Zhang, Mengjie Yu, Yilin Dou, Linjie Li, Guangrui Qi, Yanli Tang

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引用次数: 0

Abstract

Gillnets are the most commonly used fishing gear targeting black rockfish (Sebastes schlegeli) and fat greenling (Hexagrammos otakii) in the artificial reef area in coastal China. However, a minimum mesh size (MMS) has not yet been established for this fishery, which is unfavorable for sustainable development and effective management of fishery resources. We compared size selectivity and catch efficiency of gillnets of four commonly used mesh size (stretched mesh size; 40, 50, 60, and 70-mm) in a typical artificial reef area in the Yellow Sea, China. Increasing the mesh size improved size selectivity of gillnets for black rockfish and fat greenling by reducing the proportion of undersized individuals. Further, changes in mesh size affected catch efficiency of target-sized individuals. To protect juveniles, while maintaining catch efficiency for target-sized fish, we recommend 60-mm as the MMS for this fishery. Our study will contribute to the development of MMS regulations in reef fisheries management in China.

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刺网是中国沿海人工鱼礁区捕捞黑石鲷（Sebastes schlegeli）和胖青鱼（Hexagrammos otakii）最常用的渔具。然而，该渔业的最小网目尺寸（MMS）尚未确定，这不利于渔业资源的可持续发展和有效管理。我们比较了中国黄海典型人工鱼礁区四种常用网目尺寸（拉伸网目尺寸；40、50、60 和 70 毫米）刺网的尺寸选择性和捕捞效率。增大网目尺寸可减少尺寸过小个体的比例，从而提高刺网对黑石首鱼和胖青鱼的尺寸选择性。此外，网目尺寸的变化还会影响目标尺寸个体的捕获效率。为了保护幼鱼，同时保持目标鱼的捕获效率，我们建议将 60 毫米作为该渔业的 MMS。我们的研究将有助于制定中国珊瑚礁渔业管理中的网目尺寸管理规定。

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来源期刊

Fisheries Management and Ecology 农林科学-渔业

CiteScore

3.80

自引率

5.00%

发文量

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.