Solution #1 is one of the probelms with the current hatchery practices. Stocking a river with strains of fish not native to that river (.ie Chambers creek fish.)

Each river has its own unique variables. The native fish in that river have evolved over years to adapt to those variables.

You take fish from another river, that have evolved to adapt to a different set of variables, and then stuff them in a different river and they aren't going to survive/reproduce very well.

Kind of like a thousand years ago, taking an eskimo and putting them in Africa. It just doesn't work.