Korsten, Peter; Clutton-Brock, Tim H; Pilkington, Jill G.; Pemberton, Josephine M; Kruuk, Loeske
Males and females often have different requirements during early development, leading to sex-specific interactions between developing offspring. In polytocous mammals, competition for limited resources in utero may be asymmetrical between the sexes, and androgens produced by male foetuses could have adverse effects on the development of females, with potentially long-lasting consequences. We show here, in an unmanaged population of Soay sheep, that female lambs with a male co-twin have reduced...[Show more]
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