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- W1999331366 abstract "It has been suggested that female dominance in spotted hyenas evolved due to selection for hyperaggressive androgenized females. According to this view, virilized external genitalia of female hyenas developed as a byproduct of selection for androgen-facilitated social dominance. The evidence that female hyenas have higher androgen levels than males or other female mammals is inconclusive. We compared concentrations of testosterone (T), 5alpha-dihydrotestosterone (DHT), and androstenedione (AE) from a population in the Serengeti. Females had significantly lower T and DHT levels than predispersal and postdispersal males. AE levels did not significantly differ between females and postdispersal males, but were significantly lower in predispersal males. Our results, and those from studies that have demonstrated that male and female hyenas experience similar levels of maternal androgens during fetal development, provide little support for a theory of selection for female dominance and hyperaggressiveness through enhanced secretion of androgens. Our data are consistent with an alternative view that female virilization is a byproduct of selection for precocial aggressive cubs of both sexes. According to this view, high investment in lactation favored selection for accelerated fetal development, high neonatal aggression, and facultative siblicide." @default.
- W1999331366 created "2016-06-24" @default.
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- W1999331366 date "2001-02-01" @default.
- W1999331366 modified "2023-09-27" @default.
- W1999331366 title "Androgens and the Role of Female “Hyperaggressiveness” in Spotted Hyenas (Crocuta crocuta)" @default.
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- W1999331366 doi "https://doi.org/10.1006/hbeh.2000.1634" @default.
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