There was a C&R study on coho in AK. In the tidewater/lower river the mortality, as I recall, was way over 50%.

Alexandersdottir was one of the authors.

The bonk your first legal fish is currently the rule in the Skok; I think it applies to hatchery steelhead in the upper Columbia, too.

If memory serves, and this is going back to the 70s, the limit on gamefish (anything WDG managed) was whatever you caught, not what you kept. For example, you could catch 2 steelhead. Then, you were done whether you released them or not. Also, had to punch them. Idea was to move folks off the river.