The fate of conventional and potentially degradable gillnets in a seawater-sediment system

被引：19

作者：

Brakstad, Odd G. ^{[1
]}

Sorensen, Lisbet ^{[1
]}

Hakvag, Sigrid ^{[1
]}

Fore, Heidi M. ^{[2
]}

Su, Biao ^{[3
]}

Aas, Marianne ^{[1
]}

Ribicic, Deni ^{[3
]}

Grimaldo, Eduardo ^{[4
]}

机构：

[1] SINTEF Ocean, Dept Climate & Environm, Trondheim, Norway

[2] SINTEF Ocean, Dept Energy & Transport, Trondheim, Norway

[3] SINTEF Ocean, Dept Aquaculture, Trondheim, Norway

[4] SINTEF Ocean, Dept Fisheries & New Biomarine Ind, Trondheim, Norway

来源：

MARINE POLLUTION BULLETIN | 2022年 / 180卷

关键词：

Plastic; Gillnets; Marine environment; Ghost fishing; Fate; Degradation; MICROBIAL-DEGRADATION; FISHING PERFORMANCE; POLYAMIDE; 4; BIODEGRADATION; SOIL; ADIPATE-CO-TEREPHTHALATE); POLYESTERS; BACTERIA; THREATS; OIL;

D O I：

10.1016/j.marpolbul.2022.113759

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Abandoned gillnets in the marine environment represent a global environmental risk due to the ghost fishing caused by the nets. Degradation of conventional nylon gillnets was compared to that of nets made of poly-butylene succinate co-adipate-co-terephthalate (PBSAT) that are designed to degrade more readily in the environment. Gillnet filaments were incubated in microcosms of natural seawater (SW) and marine sediments at 20 degrees C over a period of 36 months. Tensile strength tests and scanning electron microscopy analyses showed weakening and degradation of the PBSAT filaments over time, while nylon filaments remained unchanged. Pyrolysis-gas chromatography/mass spectrometry revealed potential PBSAT degradation products associated with the filament surfaces, while nylon degradation products were not detected by these analyses. Microbial communities differed significantly between the biofilms on the nylon and PBSAT filaments. The slow deterioration of the PB SAT gillnet filaments shown here may be beneficial and reduce the ghost fishing periods of these gillnets.

引用

页数：11

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