It is sad how many fish are harvested even though numbers decline. What they need to do is make the limits more strict, but be careful not to make it too strict. If a fish population builds too quickly and there is not enough for them to eat, they will obliterate their own food and in turn obliterate their own population. I am a commercial sockeye fisherman and a good example is this 1 river, its an eskimo name I can't spell so I won't try. The salmon population was dropping so they set very strict limits on how many could be taken out of there. Well, to make a long story short they let too many salmon through and they used up all of their resources in the river, and the entire river system's fishery was almost lost. They learned their lesson and now they only let 1 million salmon through every year on all the rivers in bristol bay now.(before they were letting 7 million and that's what caused the damage) The system works great, the fish keep coming back in huge numbers every year.
I wish they would take a hint on fish conservation here in WA. The Puget Sound used to be an excelent place to fish. It's so overfished now you could go a week straight with the same piece of bait in the water the whole time, and not catch a thing worth keeping.