We also need to be cautious about depending on government agencies to regulate our resources. If anyone is interested in a fascinating read on the history behind the many invasive species in our Great Lakes, I suggest you read Pandora's Locks. It documents the sad story of how the Seaway, Welland Canal, and Erie Canal contributed to one of the greatest man produced ecological disaster of all time. Sadly, there was data warning the agencies of the problems with ship's ballast that was ignored. I guess we are still blessed to have the fisheries that are available today.