FATAL SIBLING AGGRESSION, PRECOCIAL DEVELOPMENT, AND ANDROGENS IN NEONATAL SPOTTED HYENAS
FATAL SIBLING AGGRESSION, PRECOCIAL DEVELOPMENT, AND ANDROGENS IN NEONATAL SPOTTED HYENAS
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DOI：
10.1126/science.2024122
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发表时间：
1991-05-03
期刊：
影响因子：
56.9
通讯作者：
LICHT, P
中科院分区：
文献类型：
--
作者：
FRANK, LG;GLICKMAN, SE;LICHT, P
致命的新生儿兄弟姐妹攻击是常见的食肉鸟类，但以前没有报告在野生哺乳动物。斑鬣狗女性强烈男性化，无论是解剖学和行为，显然是由高水平的雄激素在个体发育。新生儿表现出雄激素水平升高，早熟的运动发育，和完全萌出的门牙。幼崽通常是双胞胎，兄弟姐妹在出生时会发生暴力冲突，显然导致同性幼崽中的一个兄弟姐妹死亡，而在混合性别的幼崽中，两个兄弟姐妹通常都能存活下来。
Fatal neonatal sibling aggression is common in predatory birds but has not been previously reported in wild mammals. Spotted hyena females are strongly masculinized, both anatomically and behaviorally, apparently by high levels of androgens during ontogeny. Neonates display elevated androgen levels, precocial motor development, and fully erupted front teeth. Litters are usually twins, and siblings fight violently at birth, apparently leading to the death of one sibling in same-sex litters, whereas in mixed-sex litters both siblings usually survive.