Ok, a native female heads up river, then sees a nice male hatchery fish and they decide to spawn. The hatchery ,male continues up to the hatchery while the native female goes back down river. Her babies swim out to the sea without being clipped. So are they native or not? Aren't they all mixed by now? I am just wondering how they tell a true native. Will they not spawn with hatchery fish? Is there truly a 100% strain of wildfish left? I am asking this in serious mode. I am wondering if there is an actual study of native fish only spawning with other natives, or is it a survival mode either way???