Differential Effects of Maternal Yolk Androgens on Male and Female Offspring: A Role for Sex-Specific Selection?
Fig 1
Sex-specific effects of yolk androgens in great tits.
Difference in A) fledging size and B) fledging mass of male and female great tit nestlings originating from an egg with experimentally increased yolk testosterone content (T) or a control egg (C). Means ± 1 SE of the residuals (+1) of an analysis that included nest ID, brood size and hatching date are shown. Size difference between C and T males: P = 0.021, size difference between C and T females: P = 0.477; mass difference between C and T males: P = 0.026, mass difference between C and T females: P = 0.136.