It's possible that the ESA status of the listed chinook has changed in the past year, the 2005 listing documdent was easy to access. More pertinent to this thread is the many pages of documentation that detail how the Puget Sound Chinook ESU was determined. I am sure you have read and participated in the work that examined the relationship of Puget Sound chinook wild stocks, naturally spawning chinook, and hatchery chinook. A great deal of time and effort went to answering the question "Hatchery fish or Wild fish one and the same". I would recommend that anyone truly interested in the question should look at the listing documentation and how the relationship between hatchery and wild stocks are determined.