I’ve been involved in a couple of recent reviews studies attempting to quantify the relative reproductive success or “fitness” of hatchery and natural orign salmon and steelhead. This is essentially an updated overview that includes the most recent published and unpublished information I’m aware of.

I’d like to acknowledge and thank Mike Ford, Hitoshi Araki, and Mike Blouin for their work these written reviews. And discussions with them and the Adhoc supplementation workgroup and others have helped me think about different ways to look at the available data. But, they are in no way guilty by association for the things I’m about to say.