They have been everywhere else, without much evidence to show a detrimental effect on any fishery I've seen. Why would cwood be different guys? I can't see why. Champlain fishery is robust. Even twin has excellent bass pop, and alewifes are plentiful.

We add invasives, and it seems mist times it makes the fishery better!!!!

Gobies, alewife, snakeheads, pike, zebra mussels, milfoil, hydrilla, green and Asian crabs... The only thing that ever suffers seems to be stocked trout. Granted the asiatic carp and non native form of lamprey do damage, but other than that?