Hair, you need to look up the later publications of Araki and Blouin (the author of this report). Their conclusions with much more information than the initial report are not as positive. They also are not as negative as some folks on this board will suggest, but the general conclusion is that there is a significant loss of reproductive success (when at least one of the spawning pair is a hatchery fish) with hatchery steelhead programs, even when broodstock is collected from natural-origin steelhead (called Hatcherynew in this publication).