I'll turn to my colleague, David Gillis, in a second, but I think it's fair to say in the fish management business, you always need to deal with uncertainty. You will never get enough certainty to narrow the confidence limits to a point where you have a very precise number. You're always dealing with some degree of uncertainty. The whole point of the precautionary approach is not to fail to act even in the face of that uncertainty.
But in this case, I think we have a time series of data showing a fairly significant trend. While it's not predictive of what'll happen next year with shrimp, I think we have a pretty high degree of confidence that what we're seeing in crab is going to be a bit of grim news in the coming years, because we measure the fish as they go through their life cycle and get bigger to the point where they enter the fishery.
Dave, on traditional knowledge....