CM -
Isn't the measure of "real" fisheries the man-days of fishing (economic value) produced.

In the mid-1980s on the Snohomish basin season long (3.5 months) WDW creel census estimated that typically showed an average of 60,000 angler trips (did not include the popular CnR season). That is just that one system. To put that in context for the 2017-2018 winter blackmouth seasons WDFW creel census produced the following estimates -

MA 6 effort of 2,220 angler trips
MA 7 effort of 8,789 angler trips
MA 8 effort of 1,325 angler trips
MA 9 effort of 7,954 angler trips
MA 10 effort of 1,836 angler trips

Or a combined estimate for the 5 MAs of just 23,000 trips.

Curt