I have been in favor of significant increases in escapement for quite a while. Looking at 1-2 k/sq metre. These get laughed at around here as being way too high. Recently read about how Russia manages pink and chum wild stocks. The capacity of the stream is 1-2 SALMON per sq metre. They try to hit 50% of that as a minimum target. That is, of course, way above what I was pushing. And, they have rather large harvests and call this MSY management.

Should be noted that they probably have more intact habitat, but probably not too different from most of the OP, especially where it is in the Park.