Bycatch Reduction of Multispecies Bottom Trawl Fisheries: Some Approaches to Solve the Problem in the Northwest Pacific

摘要

The term bycatch commonly refers to the part of a catch that is not the target species. Bycatch includes those fish captured that are undersized, prohibited, inedible, or unsalable. Different parts of the bycatch are sometimes called trash, discard, and incidental catch. Global estimates of discarded fish ranged from 17-9 to 39-5 million metric tons per year that constitutes roughly one-third of the total marine catch (Alverson 1996, 1997). Bycatch, the capture of unmarketable or restricted species during commercial fishing, is a world economic, environmental, and political problem (Alverson and Hughes 1996; Alverson 1999; Hall et al. 2000).