We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Fishing efficiency of biodegradable PBSAT gillnets and conventional nylon gillnets used in Norwegian cod (Gadus morhua) and saithe (Pollachius virens) fisheries
Summary
Fishing trials in Norway found that biodegradable PBSAT gillnets performed comparably to conventional nylon gillnets for catching cod and saithe. Biodegradable fishing nets represent a promising way to reduce the amount of lost gear — ghost fishing gear — that contributes to plastic pollution and microplastic generation in the ocean.
Abstract 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.
Sign in to start a discussion.
More Papers Like This
Biodegradable fishing gears: A potential solution to ghost fishing and marine plastic pollution
Researchers evaluated biodegradable materials as alternatives to conventional nylon fishing gear to reduce ghost fishing and marine plastic pollution. They found that biodegradable nets caught fish at comparable rates but broke down much faster in ocean conditions, significantly reducing their long-term environmental impact. The study suggests that switching to biodegradable fishing gear could meaningfully reduce marine litter and the ongoing harm caused by lost or abandoned nets.
The effect of long-term use on the catch efficiency of biodegradable gillnets
Researchers tested biodegradable gillnets over three fishing seasons and found they caught up to 47% fewer fish than standard nylon nets as they degraded faster over time. Despite lower catch efficiency, biodegradable nets could significantly reduce plastic pollution from lost fishing gear in the ocean.
Biodegradable fishing gear: A sustainable solution to ghost net pollution in marine environments
This study reviews biodegradable fishing gear based on copolyesters such as PBSAT and PBSA as sustainable alternatives to conventional polyamide nets, which persist in the ocean as ghost gear and generate microplastics. The authors assess the degradation performance, mechanical properties, and environmental profiles of biodegradable gear materials, finding them promising candidates for reducing ghost net pollution.
Can biodegradable materials reduce plastic pollution without decreasing catch efficiency in longline fishery?
Researchers tested biodegradable plastic snoods as replacements for nylon in longline fisheries targeting cod and haddock, evaluating whether the eco-friendly materials could reduce marine plastic pollution from lost gear without compromising fishing performance.
Influence of knot strength on the mechanical performance of a biodegradable gillnet
Researchers compared conventional nylon (PA6) gillnets to biodegradable alternative nets and found the biodegradable material lost even more strength at knots than expected from its weaker base fiber, making it less suitable as a direct replacement. Developing effective biodegradable fishing gear is important because lost or abandoned plastic nets — called ghost gear — are a major source of marine microplastic pollution.