I have a 1 acre pond that we built 40 years ago. Largemouth bass and bluegil at almost state record sizes. Dry as a bone this year. We haven't been down to it in years and I'm wondering what could have caused this to happen? Could mud turtles or crawfish do something this drastic or is the drought that bad this year? When I go see it this week, what should I be looking for on clues to why this has happened?