As stated before i am not a biologist, yet I think if any form of broodstocking needs to happen it should be in the form of a 4 year program where all fish that are hatchery bred are from the native strain, maximize the amount that return for four years with no retention allowed on any of them for those 4 years. All the hatchery fish will not be accepted back into the hatchery and are either forced to do their thing in the river or die at the hatchery gate( or allowed to pass the hatchery if water upstream is good.

With this program i think although the fish would have been raised in a cement pond, all the unfit fish would be easily disposed in that 4 year or so period by natural means. All the hatchery fish would be native in essence(like growing condor eggs and releasing them) and the program would then shut down with a boom of wild and hatchery NATIVE strain fish. No fish would be allowed back into the hatchery (as all the hatchery native strains would be clipped, like a rear fin, not adipose) which would stop the resulting dumbing and domesticating of the hatchery fish. The only fish that would be accepted back into the program in that 4 year period would be full native fish with no clips and maybe even have them pass a dna scale test). In all aspects it seems like those fish would return as native fish, except for the original kickstarting all the subsequent returns would be native fish. 4 years or whatever a good cycle is, and shut the program down. Done and done, if it doesn't boom back then shut fishing down on that system for there is no chance for that strain to pop back in the near future.

As stated before i am not a biologist, I am sure people will tell me this is a bad idea. I don't like non native strains as much as the next fanatic and want to see wild stocks return. What i want to know is WHY is this a bad idea? Why is the plan i just placed a bad idea? What is the loophole?