If nothing else, summer emphatically illustrates one thing ... Table Rock Lake has an incredibly diverse user group. In addition to the well-known differences between the pleasure crowd and the fishermen, even the anglers themselves have greatly differing interests. Powerdive gets tired of catching bass on his walleye rigs. I'm not crazy about catching other species while bass fishing -- and although I certainly make an exception for a good eating-size walleye or two, I promise to release the big ones (anything over 5 pounds).
I'm in the camp of those who believe that all aging lakes tend to see a decline of bass populations in the river arms and a change of living/feeding habits by the fish. My opinion is that siltation takes away spawning grounds and wood cover rots away. Without this visible cover, the fish begin to spend more and more time in open water, following the shad schools. That's not to say they don't come in shallow to feed at times, especially on crawfish, but without the plentiful shoreline cover of the lake's younger days, most bass don't stay in the shallows around the clock like they once did.
I think the A-rig has tapped a small portion of these offshore fish. But in general, it's a tough task to catch suspended fish that are zoned in on schools of shad. It's just hard to offer them anything more appealing than the millions of baitfish they are living below.
I believe one other factor is water fertility. The mountainous, rocky land surrounding Table Rock doesn't offer a lot in the way of nutrient runoff. Yes, there are some cattle farms, but largely our rainfall runoff isn't carrying a lot of nutrients. By contrast, the consistently productive lakes of east Texas --- Fork, Rayburn, Lake O'the Pines, Ray Roberts, Richland-Chambers --- are largely surrounded by farmland and built upon nutrient-rich soil.
Consider this ---- Lake of the Ozarks and Grand Lake are two of our area's most consistent producers of big bass and big tournament bags. What do they have in common? Both are surrounded by lakefront development and a big portion of that is older homes with aging septic systems. Up to a point, that septic seepage into the lake water is a good thing because of the nutrients it adds. It helps support the lower end of the food chain, which is never a bad thing. And don't believe that there's no seepage.
I'm no biologist or scientist, so everything I've said could be wrong. But I've spent nearly all of my 54 years fishing and learning a thing or two here and there, so I doubt that I'm completely off-base.