Boggess J
Folia Primatol (Basel). 1979;32(1-2):65-107. doi: 10.1159/000155906.
Almost all studies of Presbytis entellus have resulted in observations of troop male membership changes. Reports from three studies indicate that in some cases troop male membership change occurs through rapid and complete adult male replacement with attendant infant mortality. Data from other investigations of P. entellus show or suggest a different pattern of troop male membership change with no infant mortality. The phenomena of infant killing and rapid male replacement are evaluated on the basis of review of data from ten P. entellus studies. While these and my own data indicate that male social instability (i.e. frequent changes in troop male membership) is species-typical for P. entellus, they do not support the hypothesis that infant killing represents part of an evolved male reproductive strategy.
几乎所有关于长尾叶猴的研究都观察到了群体雄性成员的变化。三项研究的报告表明，在某些情况下，群体雄性成员的变化是通过成年雄性的迅速且完全替换以及随之而来的幼崽死亡来实现的。其他对长尾叶猴的调查数据显示或暗示了一种不同的群体雄性成员变化模式，且没有幼崽死亡情况。基于对十项长尾叶猴研究数据的回顾，对幼崽被杀和雄性迅速替换的现象进行了评估。虽然这些数据以及我自己的数据表明雄性社会不稳定（即群体雄性成员频繁变化）是长尾叶猴的典型特征，但它们并不支持幼崽被杀是进化而来的雄性繁殖策略一部分的假设。
