Good comments, as they make the point the Lake is a very dynamic system with so many factors effecting any given part of the ecosystem. I don't know what the emerald shiner populations were back in the 60's and early 70's. We do know the walleye population is much larger the last few years than it was back then. This is why we do research. To do our best to put all the pieces together and figure out how and why the Lake ecosystem works. The more you understand about the ecosystem, the better you can understand walleye fishing and learn how to catch more fish.