Mike,
Dipnetting is open for approx. 2 weeks a year in two places, both rivers. Those salmon are going upstream to spawn and they will just die afterwards so I guess they figure out how many salmon are needed to make it upstream to spawn to repopulate. They have fish counters to figure that out. Sometimes dipnetting will be closed if there arent enough figh making it upstream, same thing with commercial fishing. There have been times when dipnetting is only open for subsistence fishermen (Eskimos, Indians) . Dipnetting is actually only open to Alaska residents.
JR! Dont you have ANY good memories of AK?

Dont you ever miss the fish guts? the sweaty ass chest waders? lol Seriously, I still think AK in the summer is one of the most beautiful places in the world! We've had record breaking heat waves this summer.