Wild broodstock seems to be the only viable choice to the hatchery "genetics" problem. The Imnaha river (hells canyon) has an excellent weir collection unit for broodstock collection. It looks as if this example would only cause a small amount of stress on the fish. The Kalama broodstock collection doesnt seem as good though. The fish have to be loaded, transported to the hatchery, unloaded which seems as if it would cause more stress on the fish. The Imnaha setup is all in one place, no transport involved.
I am also concerned that not allowing the native fish to spawn upriver, will in turn "confuse" their offspring to the point of no wild fish spawning in its native creek. Instead they will all return to the hatchery. I am aware of the RSI device( Riverside Incubators) but I am not sure how well this works. Plus the fact that hatchery workers/biologists, dont know which creek the native fish naturally spawns in ( unless they radio track it) therefore, the RSI could not be placed in the "natural" areas. Some may think that these minute details don't matter, but there is still so much about salmonid life/behavior that we know nothing about. And how we affect native spawner( for the few that remain) now may forever change the future of its offspring