I recently read and article on hatchery salmon in Alaska and their effect on wild runs. Apparently 1.6 billion smolts are released into Alaskan waters. These contribute 56% of the Cook Inlet,Kodiak and Prince Williams Sound salmon fisheries. In Prince Williams sound 78% of the pink harvest is hatchery produced. In Southeast Alaska 70% of the chum are hatchery fish. The ADFG web site has some pretty extensive stats on hatchery salmon in the salmon fisheries/salmon enhancement section.