Reduce the hauling speed of a trawl net
Overall effectiveness category Awaiting assessment
Number of studies: 0
Background information and definitions
Hauling a trawl net back to the surface at a slow speed might allow fish to swim forward and escape the net, or if the trawl is equipped with a catch reduction device it might further encourage escape opportunities (Eayrs 2007). Whilst this may reduce the catch of unwanted fish, there is an increased potential for commercially valuable fish to also escape the trawl if hauling speed is too slow. Hauling at a slower speed may also reduce fish stress and physical damage which may result in higher survival if discarded.
Evidence for similar interventions is summarized under ‘Deployment of fishing gear and mode of operation - Reduce duration of fishing gear deployments’ and ‘Change the towing speed of a trawl net’. See also ‘Handling of Catch’.
Eayrs S. (2007) A guide to bycatch reduction in tropical shrimp-trawl fisheries. Revised edition. Rome, FAO. 108p.