Another thing to consider is the farm animals eating the same food our walleye and perch eat. We fisherman spend big bucks, time and energy to chase our favorite gamefish, yet we constantly throw back all the tradh fish that eat the food that our game fish eat. One example is sheepshead, they forage the same shinner minnows our game fish eat, yet we return them back into the lake to reproduce !! Consider all the sheepshead, white bass, white perch, that are thrown back to keep repopulating and eat all the food our gamefish are after. When food is scarce the game fish leave or their growth is stunted. I have for years made sure the junk fish I return to the lake are not able to reproduce....now if all the fisherman did that, think about how much food for gamefish would be spared !!