Excuse me but dumping hatchery fish into rivers is one COMMON tool used to save wild fish.... or at least to reduce the harvest rate on wild fish. Just look at the marine coho fisheries in this State. Mark selective fisheries are the norm now. These hatchery coho are "dumped into the rivers" (or released from multiple hatcheries into rivers) for the primary purpose of providing sport fishing opportunities for you and me... while lessening the fishing pressure on our wild stocks.