If I could find tilapia and get them stocked again, I would love to try to create a warm water 'refuge' inside a netted off area with small outlet. The TP I'm sure would find their way in, it would be a matter of life or death for them, and then one could close the small opening and use the seine net to capture them.
one could devise various boiler systems to create warm water, or try using solar heat gather into a black plastic lined cube or something to create that temp differential. I have a water spigot that I could use but I imagine the ground water at 50 something degrees would be the same temperature as the pond water that the TP are no longer able to live in.
