You'd be surprised how many you can take out. Invite some friends...With four rods we took out sixty fish in an hour when we first started correcting our pond. Get a scale, a measuring tape, and a notebook and get some data!
Maybe they'll bite to where I could take some out. I've been fishing it for a few hours each outing at least three times a week...not much for biting so far
Are they spawning already? Ours won't spawn for another month so they are murdering small spinnerbaits, in-line spinners, and shallow-running squarebill crankbaits.
You can always try live-lining a 3" bluegill.