Reproductive hormone profiles in captive male orangutans: implications for understanding developmental arrest.

@article{Maggioncalda1999ReproductiveHP,
  title={Reproductive hormone profiles in captive male orangutans: implications for understanding developmental arrest.},
  author={Anne Nacey Maggioncalda and Robert Morris Sapolsky and Nancy M. Czekala},
  journal={American journal of physical anthropology},
  year={1999},
  volume={109 1},
  pages={19-32}
}
For many years researchers have described some male orangutans as "subadult." These males are of adolescent to adult age and are reproductive, but have little to no secondary sexual trait development. Until now the only endocrine study of this arrest of secondary sexual trait development was performed by Kingsley (1982, 1988). She found that "subadult" or arrested males have lower testosterone levels than similar age developing adolescents or adult males. In this study, urine samples were… CONTINUE READING

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