ORIGINAL: ShutUpNFish
Natural reproduction by unatural fish in a system (Oximoron)....NOTHING natural about it! I don't care how much of it takes place, theres NOT enough to sustain any sort of steelhead sport fishery without stocking. No "natural" mutt breeding has ever taken place before man ever dumped them into the great lakes system in the first place.
Bingo--there is a difference between wild and natural. I have caught wild trout in Walnut in the summer time when just out walking and tossing for creek chubs. That is in no way a sustainable breeding population.