GW, you have to remember that, for the most part, every fish is both predator and prey. It would seem that they could keep their numbers in order. However, it doesn't seem to work out that way.
I put 200 two inch CNBG and 200 RES in a small 1/8 acre pond. They spawned and I relocated thousands. Due to drought, it became 1/16 acre and the fish kept reproducing. By the end of the second year, it is a green mess with nothing left alive except some one inch CNBG. Mama Nature is pretty self regulating whether it be fish, rabbits or coyotes.
Stocking less fish only delays the need to manage.
