I'll provide you with a high-level answer, and then I'll defer to my colleagues, who know the program much better.
The first statistic I think we need to think about is the 90% statistic. The populations are generally controlled to within 90% of what they were at their peak, and so the effectiveness of the program is not really a question.
In certain areas there have been outbreaks over the years, for various reasons. Right now the big problem we're having is Lake Erie. We're having to do further investigation to find out what the sources of those new lamprey populations are. There are obviously streams that are producing sea lamprey that weren't before. We're working feverishly to try to determine where they are. I think we are making some progress there.
Right now, as we said in the statement, the major areas or the major mechanisms by which we're trying to control the population are with lampricide, which is a product that's sensitive only to sea lamprey, and through barriers and trapping. A big part of our program is research as well, and we're always seeking new ways to try to control these animals. We're making great advancements in the area of pheromones as an alternative mechanism by which we can control these animals. The effort that has been put into research in the last number of years is starting to turn up some good alternatives as well.
I'll turn to Dr. Goddard to add to that.