I don't think anybody really knows that, Pat, but I think if you look where the Asian carp have been and how they've moved through water systems, once they go through there's nothing left behind them. I think what happens is that once they get into the Great Lakes and they start to reproduce, everything they like is there. Peter can probably answer a little bit better about the different types of food sources they like, but everything they like is there abundantly.
I personally think they will explode in the Great Lakes. You might have certain pockets of fisheries that will survive in certain areas, but I think you'd just be lucky if you had one, you know....
I honestly think that once they get into the Great Lakes and they start to reproduce, we're in big trouble, and I think it will go very quickly.