First off no troll fisheries for steelhead and even if there was a gillnet fishery it wouldn't skew the results. You would have data with hatchery fish and a gillnet fishery and than without hatchery and a gilnet fishery There would still be some viable info there. Even w/ gilnet fishery some fish are making it back and you would be able to study there productivity without hatchery fish present. Obviuosly a system without a tribal fishery would be ideal, and there are a couple, But I think a study like this could be of some value.

Joe