Fig. 4

Development time of male and female (Experiment 3.1). A Development time (larva to adult) of the FSB and FCB females when their parents were subjected to cold shock or no shock treatments. We found a significant effect of the selection with FSB females developing ~ 2–6 h slower than FCB females. Treatment had no significant effect. B Development time (larvae to adults) of the FSB and FCB males when their parents were subjected cold shock or no shock treatments. We found a significant effect of selection regime with the FSB males developing 3–5 h slower than FCB males. Treatment had no significant effect. The light gray box plot represents the FCB, and the dark gray box plot represents the FSB populations