tribulator, you've pretty well figured out your problem. An overpopulation of small LMB can decimate the smaller BG which will disrupt the food chain. If you do take out the 30 pounds per acre, you may want to consider electroshocking the pond. 270 pounds of small LMB is an awful lot to remove via hook and line.
Yes LMB are cannibals. If the preferred forage is not there for them, they will eat the smaller LMB.
IMO, if you're using the Zoom Fluke, you're using a great bait for the larger LMB. Cull fishing and trophy fishing are 2 different things, and take different baits.
Good luck, and welcome aboard.
