i havent been following this thread that much but I might add some info a Ohio dnr lady told me at a meeting, she said there are 2 roughly 6 to 800 acre lakes in sw ohio that they do studies on and compare info on, each has the same species of fish, Channels, Lmb bass, Saugeye, Crappie, Blue gills etc and both have Shad, the water quality is so much better in one of them and that lake has many more shad, that that lake will produce a 9" Crappie 2 years earlier than the lake with the lesser water quality and fewer shad which I thought was interesting and good for me. I do know once the shad get too big the Crappie cant feed on them, so when the Shad spawn is bad the Crappie suffer and dont size up as much.