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首页> 外文期刊>ICES Journal of Marine Science >Fishing efficiency of biodegradable PBSAT gillnets and conventional nylon gillnets used in Norwegian cod (Gadus morhua) and saithe (Pollachius virens) fisheries
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Fishing efficiency of biodegradable PBSAT gillnets and conventional nylon gillnets used in Norwegian cod (Gadus morhua) and saithe (Pollachius virens) fisheries

机译：挪威鳕（Gadus morhua）和赛特（Pollachius virens）渔业使用的可生物降解的PBSAT刺网和常规尼龙刺网的捕捞效率

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Fishing trials were carried out to compare the relative fishing efficiency of gillnets made of a new biodegradable resin (polybutylene succinate co-adipate-co-terephthalate, PBSAT) with conventional (nylon) nets. The fishing trials covered two consecutive fishing seasons (2016 and 2017) for cod (Gadus morhua) and saithe (Pollachius virens) in northern Norway. Results generally showed better catch rates for the nylon gillnets. The biodegradable PBSAT gillnets caught 50.0% and 26.6% fewer cod, and 41.0% and 22.5% fewer saithe than the nylon gillnets in 2016 and 2017, respectively. Even though the relative catch efficiency of the biodegradable gillnets was slightly better in 2017 than in 2016, the difference with respect to the catch efficiency of nylon gillnets may be too large for biodegradable gillnets to be accepted by fishermen if they were available commercially. Tensile strength measurements of the nylon and biodegradable PBSAT gillnets carried out before and after the fishing trials showed that the both types of gillnets had significant reductions in tensile strength and elongation at break, especially in 2017. Although less catch efficient than nylon gillnets, biodegradable PBSAT gillnets show great potential for reducing ghost fishing and plastic pollution at sea, which are major problems in these fisheries.
机译：进行了捕捞试验，以比较由一种新的可生物降解树脂（聚丁二酸丁二酸酯/己二酸酯/对苯二甲酸对苯二甲酸酯，PBSAT）制成的刺网与常规（尼龙）网的相对捕捞效率。挪威北部的鳕鱼（Gadus morhua）和赛特（Pollachius virens）的捕捞试验涵盖了连续两个捕捞季节（2016年和2017年）。结果通常显示尼龙刺网的捕获率更高。与2016年和2017年相比，可生物降解的PBSAT刺网分别比尼龙刺网少捕获50.0％和26.6％的鳕鱼，以及减少41.0％和22.5％的赛义德。尽管2017年可生物降解刺网的相对捕捞效率略高于2016年，但尼龙可刺网的捕捞效率差异可能太大，以至于渔民不愿购买可生物降解刺网，前提是可商购。在捕鱼试验前后对尼龙和可降解的PBSAT刺网进行拉伸强度测量，结果表明这两种刺网的抗张强度和断裂伸长率均明显降低，尤其是在2017年。尽管捕捞效率不如尼龙，但可降解的PBSAT刺网显示出减少海上幽灵捕鱼和塑料污染的巨大潜力，这些是这些渔业的主要问题。

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