Neef, K.J. de

birth monkey female cycle macaque stumptail ovulation stumptail macaques length study period macaca dominance rank rhesus monkeys range arctoide dominance month interval rhesu primates body weight bernstein hadidian infant macaca arctoides conception estrada reproduction weight japanese monkeys colony ovulatory japanese group animal season progesterone behavior nieuwenhuijsen gestation lengths blurton jones level blood bonnet seasonality infant production pigtail macaques mating season pigtail lammer reprod ovulatory cycles pubertal females rhesus monkey gestation species trollope abortion primate blurton f 3.00 years primatol laboratory-housed data f r organon postpartum laboratory-housed stumptail macaques production mother observation tutin sample low-ranking females birth seasonality 3 months iud females 30.2 days 4.90 years dukelow