Schlab
There is a slim chance their offspring would survive. Most fish have a genetic makeup that is designed to their specific river system and timing of the system. For example in the fraser river alone they have identified 47 different genetic subspecies of sockeye salmon. That is one of the major causes for our inability to produce more fish than we can catch. Their is a really good book that covers the failure of our hatchery system. "Salmon without Rivers" The book is extremely biased towards the removal of all hatcheries, but it does make a strong case for the removal of our hatcheries. Check it out