In florida fish farms can get a permit to kill up to ten cormorants a year.
This works only if the cormorant killer is honest. Who can say that ONLY 10 cormorants have been killed? Maybe 12 or maybe even 25?
Anyway it's better than in Latvia. Here they ALL are under protection.
But that does not help me with my ospry problem, any one tried running lines to interupt the flight path of the bird over the pond before?
You didn't mention the size of your pond but you mentioned large fish. Probably your pond isn't a tiny one.
I think that putting net or a fishing line over a pond might work only with a very small ones. For example a small garden pond with a few koi carps.