Originally Posted By: Carcassman
The problem with deliberately releasing unmarked fish in order to insure meeting egg-take goals is that you can't be sure about the number of wild fish in the egg-take. In order to run either an integrated or a segregated (essentially any) hatchery program you need to know the origin of each spawner.

All you have to do is use the CWT. Any agency person involved in broodstock collection or spawning surveys would be able to detect it as a hatchery origin fish. There are already CWT-only fish returning for double-index tagging.