I think it's just had more years of science on a very localized area. Industry pays a lot every year to do surveys, because the fish all come back into one area, or into the five areas of the coast. They are congregated. You can look at the spawn surveys. You can do that type of work. I think it's one that's easier to measure. Salmon used to be that way, but I believe the in-stream work for salmon is nowhere near what it used to be, to look at what we're actually getting for returns.
