The effect of long-term use on the catch efficiency of biodegradable gillnets

MARINE POLLUTION BULLETIN

卷:161

Article

Grimaldo, Eduardo^1,2  Herrmann, Bent^1,2  Jacques, Nadine²  Kubowicz, Stephan³  Cerbule, Kristine²  Su, Biao¹  Larsen, Roger²  Vollstad, Jurgen¹ 

[1] SINTEF Ocean, Fisheries Technol, Brattorkaia 17C, N-7010 Trondheim, Norway

[2] Arctic Univ Norway, UiT, N-9037 Tromso, Norway

[3] SINTEF Ind, Polymer Chem, N-0314 Oslo, Norway

关键词: Biodegradable gillnets;    Ghost fishing;    Gillnet fishery;    Catch efficiency;    Marine pollution;    Plastic pollution;   

DOI  :  10.1016/j.marpolbul.2020.111823

来源: Elsevier

【 摘 要 】

The effect of long-term use on the catch efficiency of biodegradable gillnets was investigated during commercial fishing trials and in controlled lab aging tests. The relative catch efficiency between biodegradable and nylon gillnets was evaluated over three consecutive fishing seasons for Atlantic cod (Gadus morhua) in Norway. The biodegradable gillnets progressively lost catch efficiency over time, as they caught 18.4%, 40.2%, and 47.4% fewer fish than the nylon gillnets during the first, second, and third season, respectively. A 1000-hour aging test revealed that both materials began to degrade after just 200 h and that biodegradable gillnets degraded faster than the nylon gillnets. Infrared spectroscopy revealed that the chemical structure of the biodegradable polymer changed more than the nylon. Although less catch efficient than nylon gillnets, biodegradable gillnets have great potential for reducing both capture in lost fishing gear and plastic pollution at sea, which are major problems in fisheries worldwide.

【 授权许可】

Free