Fig. 5. Time-to-failure during increasing and maintained high-temperature stress, and time-to-recovery following hyperthermic failure of motor patterning, in each group. (A) There was a main effect of photoperiod on time-to-failure. 12:12 locusts had a significantly longer time-to-failure than 16:8 locusts. (B) There was a significant interaction between the effects of photoperiod, pre-treatment and sex on time-to-recovery. In general, 16:8 animals had a longer time-to-recovery than 12:12 animals, but this difference was mainly driven by the 16:8 control females, whose time-to-recovery was significantly longer than all other groups. 16:8 HS males had a significantly longer time-to-recovery than 12:12 HS males.