I would just add that our recommendation, in our 2002 work, went exactly to the point you are making, that the Department of Fisheries and Oceans needs to understand the risks that are posed by aquatic invasive species and which ones pose the greatest risk to Canada's economy and ecology. In order to set priorities and in order to justify a budget allocation or a budget request, we need to know what risks are posed by these invaders. What are the sectors of the economy that are put at most risk by them, and what would it cost? That's a question best asked to the department.
On June 5th, 2008. See this statement in context.