Thermal tolerance assays.

<p>Medians with 95% confidence intervals (obtained with bootstrapping; <i>n</i> = 10,000) for stress tolerance of male and female flies from the laboratory reared at 25°C and the field in four temperature stress assays: (A) heat knockdown; (B) heat ramping; (C) 2 h chill coma recovery; (D) cold ramping, <i>n</i> = 22–25. Heat and cold ramping were also performed on laboratory flies reared at 13°C.