Fig 5.

Effect of cold shock (A and B) or no shock (C) on progeny production. Closed bars represent FCB and open bars represent FSB populations. (A) Number of progeny produced by (ancestral) BRB females exposed to FSB or FCB males subjected to cold shock and allowed to recover for 4 or 12 hours. Selection and day had significant effect on the progeny production. (B) The proportion of ancestral females which had produced progeny after being exposed to FSB or FCB males that were cold shocked and allowed to recover for 4 or 12 hours. Selection and period had significant effect on the proportion of females that produce zero progeny after being exposed to cold shocked male. However, two way interaction of selection × period was not significant. (C) Under no shock treatment, there was no significant difference in the number of progeny sired by FSB and FCB males when exposed to ancestral BRB females.