Sounds like it's time to do a little ice fishing. I think a nine inch YP may be the best table fare ever invented. I'd harvest some of those new fish, and start putting harvest pressure on female bluegill next spring. My ponds are similar size so I don't think you have too much to worry about. There is a very good chance that you might have some YP reproduction next spring, so I'm sure that's where your concern comes in. Will you be feeding your fish? If so, then your YP will probably subsist on pellets and YOY bluegill. An 8-9 inch YP doesn't have a very big mouth so if you stock HSB or SMB that are bigger than that mouth I think a pellet fed YP won't harass them too much, then these predators will survive to, in turn, pressure any YOY YP. I'd be careful about waiting too long to introduce a predator because your YP could get out of hand. IIRC, the YP have the potential to become stunted. (I think BCody has made mention of this at least once. Somebody should know the relationship between perch mouth size and prey size because my YP mouths are tiny. I personally think that SMB will be a better predator on YP than HSB would be. HSB are kind of casual predators. An individual attack by an HSB is a vicious thing, but as a whole, HSB don't exert a lot of pressure on bluegill, or I assume yellow perch, like LMB or SMB would.
