Their lethal terminal low temp is 42 F +-. It would be good to have your winter temps before you stock. It is not a certainty that stocking TShad into a pond with adult LMB will result in establishing a continuing TShad population. The further you go under the recommended # the lower the probability of success. I am not suggesting that 1000 per acre is the right amount. They are sold here in loads of 5-6,000. You also need a good plankton bloom.

I am considering the same question now but if I go that route I will only do so at 1.5 times the recommended rate (# of loads). Unless I am convinced it will succeed in establishing an ongoing population I will not use TShad but will spend the $ on adult and 3-5 in BG to be added pre-spawn ( March-April here).