Reply #8: ...and remember that Great Lakes fisheries all hinge on the application of poisonous lampricides...

[roamer65]

...to many of the tributaries of the Great Lakes. I sat through a lecture by a Great Lakes fisheries specialist about 20 years ago. It was an eye-opening lecture. The entire fish stocks of the lakes hinge upon the application of these lampricides. Without the lampricides, the whole system comes crashing down within a few years.