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Trotline hook selectivity for the Atlantic Bonito (Sarda sarda Bloch, 1793) fishery in the Çanakkale Strait (northern Aegean Sea, Turkey)
Oceanological and Hydrobiological Studies ( IF 0.9 ) Pub Date : 2020-09-01 , DOI: 10.1515/ohs-2020-0025
Alkan Öztekin 1
Affiliation  

Abstract This study was conducted to determine the selectivity of hooks (galvanized, tin, carbon, nickel) used for Atlantic bonito (Sarda sarda Bloch, 1793) in the Gallipoli Peninsula and the Dardanelles during the 2015 and 2018 fishing seasons (spring and autumn). The Atlantic bonito was fished with hooks of size 1/0, 2/0, 3/0, and 4/0. A total of 604 bonitos were caught, including 201 individuals using a galvanized hook, 194 individuals using a tin hook, 158 individuals using a nickel hook and 51 individuals using a carbon hook. A lower catch was obtained with hooks of size 4/0 (42 in total). The highest catch (100 total) was obtained with hooks of size 1/0 and a lower catch (19 in total) was obtained with hooks of size 4/0 in the case of tin hooks. In the case of nickel hooks, the highest catch (63 in total) was obtained with hooks of size 1/0 and a lower catch (eight in total) was obtained with hooks of size 4/0. The optimum catch length and curve width were calculated in relation to the size of hooks. It was determined that all hooks used in the experiments catch below the length allowed for fishing. It was therefore concluded that the use of the largest hooks would be preferable, with size 4/0 being the most suitable for maintaining the continuity of the species.

中文翻译:

Trotline 鱼钩对 Çanakkale 海峡(土耳其爱琴海北部)大西洋鲣鱼(Sarda sarda Bloch,1793 年)渔业的选择性

摘要 本研究旨在确定 2015 年和 2018 年捕鱼季节(春季和秋季)在加里波利半岛和达达尼尔海峡的大西洋鲣鱼(Sarda sarda Bloch,1793 年)使用的鱼钩(镀锌、锡、碳、镍)的选择性. 大西洋鲣鱼是用 1/0、2/0、3/0 和 4/0 号鱼钩钓到的。共捕获鲣鱼604条,其中镀锌钩201条,锡钩194条,镍钩158条,碳钩51条。使用 4/0 号(总共 42 个)的钩子获得了较低的捕获量。使用尺寸为 1/0 的钩子获得了最高的捕获量(总共 100 个),而在锡钩的情况下,使用尺寸为 4/0 的钩子获得了较低的捕获量(总共 19 个)。在镍钩的情况下,使用尺寸 1/0 的钩子获得最高的渔获量(总共 63 个),使用尺寸为 4/0 的钩子获得较低的渔获量(总共 8 个)。最佳钓钩长度和曲线宽度是根据钩子的尺寸计算出来的。确定实验中使用的所有鱼钩都能钓到低于允许钓鱼的长度。因此得出的结论是,最好使用最大的钩子,4/0 号最适合保持物种的连续性。
更新日期:2020-09-01
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