Well how about Keyuka lake? Long time ago was a smelt and big laker lake with other trout species being caaught frequently. 10 to 15 years ago was a lots of 5 - 8 pounders and alwives only, no smelt. Now the little lakers ( rarely over 23 inches) are eating perch. what happened there. Ten years ago there were two ice fishing season in a row where you could walk out to the bluffs then the next year the big flood, what effect did they have? We fish it because we don't like the bigger water but in 20 years what a change.......jk