If I'm not mistaken the Bull frog and the leopard frogs are the ones used for "frog legs". Perhaps if you informed the fishing company that they have two sources of income in this one pond at least the frogs would not go to waste. America is one of the largest importers of frog legs in the world. They have tried frog farming in various southern states maybe your pond would be a good source. That fishing company could even sell the use of that pond to a frog leg company. Large companies often think with their profits and that is sometimes the best motivating factor.