Cant they just put up a physical barrier. Like a net. Where are these critters?
Grew up on Lake Michigan. Get there in the morning in the 60s and the beach was covered with dead fish. Whipping your siblings with dead fish was a source on entertainment. And a source of anger for my mom.
We survived.
https://www.youtube.com/watch?v=tLmJjRqXDCo
My spouse had one smack in shoulder—it hurt as the carp can get quite large.
They really are a menace and a regional group effort needs to be coordinated to eradicate them before they decimate the fishing and tourist industries of all The Great Lakes.
From what I’ve read later they only seem to be in Little Calumet. Most of that is pretty much a stream. Not exactly a shipping channel. Nets that are 15 ft high??????