No you collect salmon eggs, you fertilizer them, you put them in the head waters above the current damn, they will return there to die, it has been proved several times already. There is a documentary on a restored river, and just like clock work the salmon returned. Look it up!!! I watched it several years ago.
Which sounds good until you realize that when they first built this dam, they were required by law to provide other water paths for the salmon to get back upstream, and they IGNORED THE LAW to save money.
What makes you think they will spend the money to collect eggs, fertilize them, and then put them up in the head waters???????