It was a long time ago, and it was salmon, but WDF had something like 90--95% of the commercial salmon catch in PS (I and NI) within 3 days of the fishery. Not only had, but it was on the computer system and available. With daily crab landings, no reason why information is not available within a couple of days. Generally, the afternoon after a GN fishery (they fished at night) we had enough information to make an informed guess as to what was going on.

The best one, though, was Canada DFO. They put purse seines into the mouth of the Fraser, a place that had never fished but were put there as their "share" was short. The target was 750K. After a few water hauls the boys found the fish and took the 750K in 4 hours. DFO closed it after 4 hours. It can be done, you just have to want to.