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.
I had considered that it might be better to stock non-blue tilapia, so they would slow down when the bass are more active, and be consumed at a higher rate. I would worry that the bass wouldn't be feeding heavily enough to take advantage of a huge volume of dying blue tilapia.
