Offspring sex ratio in relation to maternal age and social rank in mountain goats (Oreamnos americanus)

@article{Ct2001OffspringSR,
  title={Offspring sex ratio in relation to maternal age and social rank in mountain goats (Oreamnos americanus)},
  author={Steeve D. C{\^o}t{\'e} and Marco Festa-Bianchet},
  journal={Behavioral Ecology and Sociobiology},
  year={2001},
  volume={49},
  pages={260-265}
}
In polygynous mammals, high-quality females may increase their fitness by producing a high proportion of sons. During a 9-year study of marked mountain goats (Oreamnos americanus), we assessed the relative effects of maternal age, social rank and reproductive status on offspring sex ratio. The sex ratio of kids in the population did not differ from unity (75 males, 85 females). The proportion of female kids decreased markedly with maternal age. Young females (≤6 years old) produced… CONTINUE READING
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