0 fish or other sea creatures that are caught unintentionally by people who are trying to catch other types of fish:
Thus, these bycatch species are undesirable outputs and there is joint production with desirable and undesirable outputs with unknown product transformation possibilities.
Other species of fish may also be taken as a bycatch when pelagic gear is used and these may include demersal species.
They can become bycatch victims when they engage in a feeding frenzy.
Work has also identified that acoustic devices known as pingers are effective in reducing bycatch of harbour porpoises in fixed gear fisheries.
Vessels with smaller engines cannot carry large trawls and have no problems with cetaceous bycatch, because smaller trawls have different mesh sizes.
This should allow for the accurate monitoring of any accidental bycatches of basking sharks.
Then there is the hidden transfer and sale of quotas and rights and, in addition, the great uncertainty attached to bycatches in other fisheries.
The bycatch of human consumption species in industrial fisheries is considerably smaller than the discards of juvenile fish from the white fish fisheries.