Sex-specific developmental plasticity in response to yolk corticosterone in an oviparous lizard
offspring sex ratio. However, corticosterone did have a sex-specific effect on skeletal growth during embryonic development.
Male embryos exposed to relatively high levels of corticosterone were smaller on average than control males at hatching whereas females from hormone-treated eggs were larger on average than control females. The data thus suggest that males are not just more sensitive to the detrimental effects of corticosterone but rather that the sexes may have opposite responses to corticosterone during development. Positive selection on body size at hatching for both sexes in this species further suggests that increased corticosterone in egg yolk may have sex-specific fitness consequences, with potential implications for sex allocation and the evolution of hormone-mediated maternal effects.
- Ctenophorus fordi
- phenotypic plasticity
- ISSN: 1477-9145
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