Comparison of fishing efficiency between biodegradable gillnets and conventional nylon gillnets | Bycatch Management Information System (BMIS)

Year

2019

Species Groups

Fishing Gear

Mitigation Techniques

ALDFG - management of abandoned, lost, discarded fishing gear

Type

Journal Article

Authors

Grimaldo, Eduardo

Herrmann, Bent

Su, Biao

Føre, Heidi Moe

Vollstad, Jørgen

Olsen, Leonore

Larsen, Roger B.

Tatone, Ivan

DOI

10.1016/j.fishres.2019.01.003

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Source URL

http://www.sciencedirect.com/science/article/pii/S0165783619300037

Citation

Grimaldo E, Herrmann B, Su B, et al (2019) Comparison of fishing efficiency between biodegradable gillnets and conventional nylon gillnets. Fisheries Research 213:67–74. https://doi.org/10.1016/j.fishres.2019.01.003

Abstract

Gillnets made of a new biodegradable resin (polybutylene succinate co-adipate-co-terephthalate (PBSAT) were tested under commercial fishing conditions to compare their fishing performance with that of conventional nylon (PA) nets. The relative catch efficiency between the two gillnet types was evaluated over the entirewinter fishing season for cod (Gadus morhua) in northern Norway. The nylon gillnets caught 21% more fish (in numbers) than the biodegradable gillnets throughout the fishing season and generally showed better catch rates for most length classes, except for sizes between 82 and 90 cm. The difference in elasticity and breaking strength could explain the major difference in the size structure of fish caught by each type of gillnets, especially for larger fish. The number of times that the gillnets were deployed affected the relative catch efficiency of the gillnets with the biodegradable continuously loosing efficiency compared to the nylon. Although less catch efficient than nylon gillnets, biodegradable gillnets still show great potential for reduction of ghost fishing and plastic pollution at sea caused by this fishery.