Thats more often than I had been told but I did know they outbred the bluegill just not by how much. I think that they must also have a higher survival rate. By the end of the summer the edge of my pond was solid 3 to 4 inch tilapia and almost any bass or catfish we caught looked like a balloon from eating them. I wonder if there are any adverse effects on the bluegill from having so many tilapia? Even with a very heavy predator base the predators seemed to have no effect on their numbers. I can see how they could take over your pond if they didn't die in the winter.
