• 1. Ghost fishing is caused by derelict synthetic‐fibre nets that have been lost at sea. Thus, biodegradable nets have been developed with the aim of protecting marine ecosystems.
• 2. The performance of biodegradable nets and their ability to replace conventional gillnets was assessed. Two types of biodegradable nets were used in the experiment: one made from a blended resin containing 90 wt% polybutylene succinate (PBS) and 10 wt% polybutylene adipate‐co‐terephthalate (PBAT) (Bio‐1), and the other made from a polybutylene succinate co‐adipate‐co‐terephthalate (PBSAT) resin (Bio‐2) with improved flexibility and physical homogeneity.
• 3. For No. 3 monofilaments (standard diameter, Ø, 0.284 mm), Bio‐1 and Bio‐2 both showed a wet straight‐line breaking strength of around 99% that of polyamide (PA). For No. 2 monofilaments (Ø 0.200 mm), the wet straight‐line breaking strengths of Bio‐1 and Bio‐2 were 84.9 and 93.0% that of PA, respectively, indicating worse physical properties for Bio‐1 at No. 2 thickness.
• 4. The wet knotted breaking strengths of No. 3 thickness Bio‐1 and Bio‐2 were 92.9 and 82.7% that of PA, respectively. The straight‐line breaking strength of Bio‐2 was 1.1 times that of Bio‐1. The wet knotted breaking strengths of Bio‐1 and Bio‐2 were 80.2 and 93.4% that of PA, respectively, and the knotted breaking strength of Bio‐2 was around 1.2 times that of Bio‐1.
• 5. Regarding flexibility, for No. 3 thickness monofilaments, the mean wet stiffness values of PA, Bio‐1, and Bio‐2 were 9.50, 15.23, and 9.68 g, respectively, indicating that Bio‐2 was similar to PA and around 1.6 times softer than Bio‐1.
• 6. The fishing performance, by weight, was PA > Bio‐2 > Bio‐1; however, the difference between PA and Bio‐2 was not statistically significant. Biodegradable nets may not be a perfect solution, but we believe that they can contribute greatly to reducing ghost fishing and protecting marine ecosystems.

中文翻译：

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使用可生物降解的树脂（PBS / PBAT和PBSAT）评估刺网的物理特性和捕鱼性能，以减少幽灵捕鱼

• 1.幽灵捕鱼是由遗弃在海上的合成纤维网造成的。因此，为了保护海洋生态系统而开发了可生物降解的网。
• 2.评估了可生物降解网的性能及其替代传统刺网的能力。两种类型的可生物降解的网在实验中使用：一个由含有混合树脂制成90重量％的聚丁二酸丁二醇酯（PBS）和10％（重量）聚丁烯己二酸酯共-terephthalate（PBAT）（BIO-1），而另一个从制成聚丁二酸丁二醇酯共-adipate-共-terephthalate（PBSAT）树脂（BIO-2）具有改善的柔韧性和物理同质性。
• 3.对于3号单丝（标准直径，Ø0.284 mm），Bio-1和Bio-2均显示出湿直线断裂强度约为聚酰胺（PA）的99％。对于2号单丝（Ø0.200 mm），Bio-1和Bio-2的湿直线断裂强度分别是PA的84.9％和93.0％，这表明Bio-1在2号厚度时的物理性能较差。
• 4. 3号厚度Bio-1和Bio-2的湿结断裂强度分别是PA的92.9和82.7％。Bio-2的直线断裂强度是Bio-1的1.1倍。Bio-1和Bio-2的湿结断裂强度分别是PA的80.2％和93.4％，Bio-2的湿结断裂强度是Bio-1的1.2倍左右。
• 5.关于柔韧性，对于3号厚度的单丝，PA，Bio-1和Bio-2的平均湿劲度值分别为9.50、15.23和9.68 g，这表明Bio-2与PA相似，并且在周围比Bio-1软1.6倍。
• 6.按重量计的捕捞性能为PA> Bio-2> Bio-1；但是，PA和Bio-2之间的差异没有统计学意义。可生物降解的网也许不是一个完美的解决方案，但是我们认为它们可以为减少幽灵捕鱼和保护海洋生态系统做出巨大贡献。