Bycatch — the unintended taking of juvenile tuna, non-targeted fish, and other animals — and discards of unsuitable catch occur in nearly all of the world’s many commercial fisheries. In some they are large enough to affect the fishery, while in others they are insignificant biologically and economically. Either way, bycatch and discards represent waste of natural resources, even for species whose commercial value may be nil and whose role in the ecosystem may be as yet undefined.
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