Bluegills can overpopulate in a pond, so taking some out to eat once the population is established isn't a bad thing.

Down here, growing Yellow Perch to 14"+ isn't that hard if you feed them. 15"+ takes a bit more time. 16'+ is rare, but doable with good genetics.

www.hoosierpondpros.com

[Linked Image from lh6.ggpht.com]
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3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).