I think Shorty described some pretty large amounts of winter kill in his RES last year in Nebraska.
My winter kill happened at ice out after a very warm week in February that rapidly took 8-9" ice off the pond and likely mixed the water column in my 1/4 acre, I think the entire water column was super cooled at ice out. If I recall correctly Condello once hypothesized that the lethal water temperature for RES was right around 39 degrees. 39 degrees might be the point where the fish oils in RES gel, solidify, and they can no longer move and breath, they simply suffocate. I picked up 128 floaters in the 5 weeks after ice out last spring, most were between 5" and 8", I am pretty sure there were a bunch that never floated.
