Studies were conducted aboard beam trawlers in the North Sea to determine the performance of pulse beam compared to conventional tickler chain beam trawlers. Overall the pulse beam trawl caught 68% less than the conventional trawls. Specifically, the pulse beam trawl caught significantly fewer plaice (Pleuronectes platessa) and sole (Solea vulgaris) compared to the conventional beam trawl. There was no significant difference in catch rates of undersized plaice between the two gears but the pulse beam trawl caught significantly less undersized sole. Pulse beam trawls caught more turbot (Psetta maxima) and brill (Scophthalmus rhombus) (78%-131%) than conventional trawls but fewer cod (Gadus morhua) (15%-60%). In addition, catch rates of bottom species, including sandstar (Astropecten irregularis), common starfish (Asterias rubens) and swimming crabs (Liocarcinus holsatus), were significantly less when the pulse beam trawl was used.
Year
Journal/Publisher Name
Institute for Marine Resources and Ecosystem Studies
Volume (Issue #)
Report C014/06
Page #s
60
Contact information
fisheriesresearch.asg@wur.nl
Summary
Field Studies
Performance of pulse trawling compared to conventional beam trawling
Study Type
Field study in the wild
Location
Netherlands
Target catch
Various
Effect on bycatch species
No significant difference in catch rates of undersized plaice; pulse trawl had lower rates of undersized sole; lower catch rates of benthic fauna in pulse trawl
Effect on target catch
Significantly lower catch of target plaice and sole in pulse trawl
Bycatch species
Reduction technique
Fishing Gear