I would add that one of the strengths I saw in Fraser sockeye management in the 80s was that every week we not only reviewed the current data but looked at all the historic (this went back to 1890 in some cases) information to see just what the current year best looked like. So, when decisions were made, the decision makers couldn't claim ignorance or "we didn't think of that". Obviously time consuming, but the fish were doing well then.