May 27, 2022 — Hawaii’s deep-set longline fleet is completing its changeover from wire leaders to nylon monofilament, a process that fishermen started on their own and is expected to reduce bycatch and mortality of threatened oceanic whitetip sharks by 30 percent.
A new federal regulation effective May 31 will prohibit the use of wire leaders in the fishery, formally instituting the industry-led initiative.
Wire leaders have been used so hooked fish can’t break off, and to make gear safer for fishermen. But even the sharp-toothed oceanic whitetip sharks can’t bite through them, meaning fishermen must release them, a dangerous process for both fish and fishermen.
The Hawaii Longline Association, representing tuna longline fishermen in the area, took the initiative to stop using wire leaders when deep-set longline fishing when its members voluntarily phased out wire leaders starting in November 2020, according to HLA Executive Director Eric Kingma.
“Our members—which include all of the Hawaii-based longline fleet of around 145 vessels—don’t want to catch sharks,” Kingma said in a joint statement with NMFS. “While the amount of fishing effort by Hawaii vessels is small compared with foreign fleets, we continue to work with our members and researchers on innovative methods to minimize the impacts of our fishery on these sharks and other protected species.”