Check out the link below for a summary of an ODFW report looking at the effect of hatchery spawners on a wild steelhead population. I haven't read the report so I can't comment on exactly how the results were obtained, but it seems pretty discouraging. Pretty much says that all hatchery spawners, broodstock included, are bad for a wild population. This seems anti-intuitive, so I'm gonna see if I can get a look at the report.

By the way, been lurking for a while, but thought this article would be interesting to some people on this board so I took the plunge and registered. I'm looking to actually get out and do some fishing this year instead of fishing vicariously through the people on this board, so hopefully will have more to say in the near future.
LDR

http://www.newsdata.com/enernet/fishletter/#6