Hatcheries need to raise big on big with some incorporation of a few wilds. It should be big on big for each year class and not just the largest fish. The genes for jacks and or 6 yr fish are in the 3 and 4yr fish even if they do not breed them. Raising salmon in this manner will allow for more natural selection as opposed to the way that things are done now which allows for much less natural selection. Yet they keep doing the same thing and wonder why the genes are diluted and the fish returns get worse and worse. It would be a simple way to improve the rings and would cost little to nothing to implement.