They do appear to be able to live side by side in some places. I fished a match last autumn at Viaduct Fishery. I fished for carp and caught about 70lb. The angler on the next peg was targeting silvers. He pulled out 40lb+ and zero carp and won the silvers pool. Fantastic weights of both carp and silvers come out regularly. Good anglers, not me sadly, who target silvers, seem to be able to mainly avoid carp. I don't fish often enough to know for certain, but I would guess a not insignificant percentage of anglers in most matches there target only silvers. Some through choice, some based on the draw. That suggests there is a market for it so it is in fishery owners' interests to have silvers as well as carp.I totally agree with the sentiment of this thread. Around where I live it's nothijng but carp. carp and more carp. Not that many years ago there used to be plenty of still waters which were full of tench, decent roach and rudd. Now they have all been stocked with loads of carp and as a result thats all there is to fish for. Carp are an alien species to this country, or at least the hybridised things that are bred as eating machines that are being introduced. They are predators in that they eat large quantities of fry and spawn, thier own as well as other species and thier agressive feeding vitually eats other species out of existance. Look on YouTube and see the damage they are doing in the USA and Australia where the authorities are netting them out of lakes and rivers by the ton to try and stop them wiping out other species.