Bycatch are species caught in a fishery while it's intended to catch another species or reproductively immature juveniles of the target species. The OECD (1997) defines bycatch as total fishing mortality excluding that accounted directly by the retained catch of target species. According to Alverson et al. (1994) there're at least four different uses of the word bycatch in fisheries. Bycatch may refer to catch which's retained and sold but which isn't the target species for the fishery. Part… (More on Bycatch)