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

• Published in: American journal of physical anthropology Vol. 109; no. 1; pp. 19 - 32
• Main Authors: Maggioncalda, Anne N., Sapolsky, Robert M., Czekala, Nancy M.
• Format: Journal Article
• Language: English
• Published: New York John Wiley & Sons, Inc 01.05.1999; Wiley-Liss
• Subjects: Animals; Animals, Zoo; Circadian Rhythm; development; dihydrotestosterone; Fertility; Follicle Stimulating Hormone - analysis; gonadotropins; Hormones; Luteinizing Hormone - analysis; Male; Orang-utans; Physical anthropology; Pongo pygmaeus - growth & development; Pongo pygmaeus - physiology; Sex Characteristics; Sexual reproduction; socioendocrinology; Southeast Asia; testosterone

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 perform...