I think, as David said before, prevention is the first option, the first thing we would be looking to. When we do a risk assessment, part of what we're looking at is if it arrived—when you're talking about an invasive species, you're talking about the arrival, survival, then establishment, and then spread. So what we would do, looking at the Great Lakes, is say the characteristics we know about that species—what do they need for breeding habitat, what do they need for food, what do they need to survive and to become established. That would help guide us as to where in the Great Lakes might be the areas of concern or the areas where they might most likely become established. So that's one of the reasons we do the risk assessment, to tell where those areas would be.
On April 2nd, 2012. See this statement in context.