Longline hook selectivity for whiting (Merlangius merlangus euxinus) with a perspective on small-scale fisheries management in the Black Sea, Türkiye

IF 4.8 2区环境科学与生态学 Q1 OCEANOGRAPHY

Ocean & Coastal Management Pub Date : 2024-11-11 DOI:10.1016/j.ocecoaman.2024.107467

Fatma Çebin , Tuncay Yeşilçiçek , Ferhat Kalayci

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引用次数: 0

Abstract

This study investigated the selectivity parameters of bottom longlines for the Whiting (Merlangius merlangus euxinus) in the small-scale fisheries of the Southeastern Black Sea. Experimental fishing operations were conducted using longlines with hook of 11, 12, 13, and 14mm gaps. A total of 552 fish specimens from four species were captured, with Whiting, the target species, accounting for 90.94% (502 specimens) of the total catch by numbers. The sizes of the Whiting ranged from 10.6 to 20.0 cm Total Length (TL), with a mean size of 15.79 ± 0.087 cm TL. The longline selectivity parameters and curves were fitted using the SELECT method, with the bi-modal model offering the best-fit, based on the lowest deviance value. The modal sizes of specimens caught using the hook of 11, 12, 13, and 14-mm gaps were 12.40, 13.53, 14.66, and 15.78 cm TL, respectively. The modal sizes and spread values increased proportionally with hook size. All the individuals caught by the 14-mm gap hooks exceeded the minimum landing size (MLS) of 13 cm. However, the proportions of individuals below the MLS for the 11, 12, and 13-mm gap hooks were 32.09%, 6.98%, and 0.68%, respectively. Based on the MLS, hooks with gaps larger than 11 mm were found to be highly selective and are recommended for sustainability of the fisheries while ensuring the conservation of immature individuals in the Whiting stocks of the Black Sea. These findings contribute to the much-needed data and information for the design of sound management plans for the small-scale fisheries in the region.

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从土耳其黑海小型渔业管理的角度看延绳钓鳕鱼（Merlangius merlangus euxinus）的鱼钩选择性

本研究调查了黑海东南部小型渔业中底层延绳钓鳕鱼（Merlangius merlangus euxinus）的选择性参数。试验性捕捞作业使用了钩间隙为 11、12、13 和 14 毫米的延绳。共捕获了四种鱼类的 552 个标本，其中目标鱼种 Whiting 的数量占总捕获量的 90.94%（502 个标本）。鳕鱼的总长度（TL）从 10.6 厘米到 20.0 厘米不等，平均总长度（TL）为 15.79 ± 0.087 厘米。使用 SELECT 方法对延绳钓选择性参数和曲线进行了拟合，根据最低偏差值，双模态模型的拟合效果最好。使用 11、12、13 和 14 毫米间隙的鱼钩捕获的标本的模态尺寸分别为 12.40、13.53、14.66 和 15.78 厘米（TL）。随着鱼钩尺寸的增加，模态尺寸和散布值也成比例增加。所有被 14 毫米间隙鱼钩捕获的个体都超过了 13 厘米的最小上岸尺寸（MLS）。然而，11、12 和 13 毫米间隙钩钓到的个体低于最小上岸尺寸的比例分别为 32.09%、6.98% 和 0.68%。根据最小可捕量，发现间隙大于 11 毫米的鱼钩具有高度选择性，建议在确保渔业可持续发展的同时，保护黑海鳕鱼种群中的未成熟个体。这些发现为该地区小型渔业设计合理的管理计划提供了急需的数据和信息。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Ocean & Coastal Management 环境科学-海洋学

CiteScore

8.50

自引率

15.20%

发文量

321

审稿时长

60 days

期刊介绍： Ocean & Coastal Management is the leading international journal dedicated to the study of all aspects of ocean and coastal management from the global to local levels. We publish rigorously peer-reviewed manuscripts from all disciplines, and inter-/trans-disciplinary and co-designed research, but all submissions must make clear the relevance to management and/or governance issues relevant to the sustainable development and conservation of oceans and coasts. Comparative studies (from sub-national to trans-national cases, and other management / policy arenas) are encouraged, as are studies that critically assess current management practices and governance approaches. Submissions involving robust analysis, development of theory, and improvement of management practice are especially welcome.