Whenever these cases come up you want to make an informed decision, and you have to be able to quickly call upon a variety of expertise to address the question. It may include hydrology. If we apply a toxin, where is it going to go next? Do we have endangered species in this system? If you do, then some of these tools, such as application of rotenone or something like that, you may immediately withdraw, simply saying the risk is too great for our endangered species. If you don't have those types of problems, then very clearly I would argue in favour of attempting to eradicate.
We had an unfortunate case a couple of years ago in Lake Winnipeg where they did try to eradicate the zebra mussel. Unfortunately, I think they didn't know the complete distribution of the species at the time and so that effort failed. But do you know what? They tried. So I have nothing but applause for what they tried to do, to see if we could keep that thing from getting into western Canada, but make sure you make informed decisions.