One of the things that makes management of any natural resource difficult is that the data is always in the past and management is always in the future. Like the stock ads "Past performance is no guarantee of future", so it is with fish.

For example, we figure out that the PDO has shifted after it occurs and then play catch-up. Catch-up is fun when the shift is from low to high productivity but sucks in the other direction.

That is why in-season management should be not only critical but the only way it is done. Seasons are conservatively set based on forecasts, or tradition, but not opened until data confirms. Soft-shell crab? The season opens when they are hard, per sampling, period. Like is done with razor clams. Salmon season? Conservative, very conservative, until the actual data says the fish are there in sufficient numbers.

Such a scheme will probably never be accepted because it does not allow sufficient certainty for business planning.