To my knowledge I don't have any male yellow perch currently on my property. I hope to keep it that way, but one never knows.
My bluegill reproduction pond sits directly below my Morton building. This is naturally the most fertile pond that I've got because it catches the runoff from the original construction site, and it also catches all of the outflow from the Po'Boy RAS and the waste contained therein.
I'm taking bluegill from ponds that are known age-2 bluegill, then selecting the best ten males and females. Then I'm selecting another ten males and ten females from the age-3 and age-4 ponds. Then I mix them together and see what I get.
The pond gets dewatered every fall to assure no carryovers.
I'll cut and paste this response to the bluegill thread.