POS I think you may naive about harvestable native runs. What about the loss of habitat? Because of poor stream managment through the decades the loss of habitat cannot be reversed. Sounds pessimistic I know but it's also reality! To suddenly expect things to be reversed is not realistic.
Commercial harvest of these wild fish especially where treaties apply is not going to happen anytime soon either.
I'm sure you have your ideas about how to go about this so POS let's hear them.