In bandying around numbers of how few rockfish are taken in salmon fisheries look at the response here to the AK pollack fisheries that take Chinook. Multi-millions of pollack and may a few tens of thousands of salmon. A minuscule fraction of the catch and they defend it that way "It is just a teeny tiny fraction.

If conservation, recovery, and restoration are to actually work, then the measure has to be the damage done to the resource we want to rescue. If the cost is too high (I wanna catch salmon in saltwater, for example) then we need to say that and accept the loss of the by catch species.