...and even if a fishing technique had a 99% release mortality...it's still selective if you take the wild ones out and throw them back in the river...

Being "selective" and "relative release mortality" are related, but not interchangeable terms.

Fishing with barbed treble hooks has a higher release mortality than does fishing with barbless single hooks, but fishing with either of them is "selective" if you release the wild ones, or non-target species...

Fish on...

Todd