I have a cottage in southern…

I have a cottage in southern georgian bay and our islands that we swim off are now inhabited by hundreds of cormarants and are so full of discusting fowl feces that you cant even approach within hudreds of yards let alone swim. I have also witnessed swarms of diving birds killing every small fish in our bay with many small gamefish mortally wounded including juvenile bass and muskies. These birds must be eradicated or severly reduced in numbers.