I still don't understand the economics here. I get at least some of the math -- yes if cowboys have lower impacts on wild fish, they will get to kill more hatchery fish. Got it.

The part I don't understand why the beloved free market hasn't been enough to push them to go selective already...? Is it a "we all have to go at once" situation?
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The charm of fishing is that it is the pursuit of what is elusive but attainable, a perpetual series of occasions for hope. -John Buchan