I'll throw out another observation-valid or not.IMO the incredible bait concentrations that I often keyed on in the past have,with 1 or 2 exceptions,disappeared.I'm not saying the lakes 'fertility' has changed(maybe it has or is) but that certain areas that nearly always 'blacked out' your graph no longer do.
Implications?I think so,I have(likely far-fetched)thoughts on it,but.....Is it related to water clarity and simply a dispersion of bait?
I guess all I'll say is think about it.All told,I suspect lots of new 'hot spots' will emerge.Some that in the past would never have been given a cast-or trolling pass.