Bill, the water temp in the pond was 50.3°F on Friday, today it's 53.8°F.
Weather is in the low to mid 70's this week, even pushing 80 on Thursday, but on Sunday they are predicting snow flurries....
While I didn't weigh the others, I'm guesstimating that I'm up to around 70# of Tilapia removed so far.
I'm sure there are a few warmer water pockets the tilapia are "trapped" in now...looking like a hybrid (badly broken curved tail fin ray markings)..I would guess 50-52 is the lethal low.
Blues dying cooler occurs when a bass' metabolism has slowed and allows the nutrient to become flesh and more high energy lipid to live on during the winter. Your bass will lose less weight over winter than it would consuming non-blue tilapia.
