Garcia C, Lee P C, Rosetta L
Laboratoire de Dynamique de l'Evolution Humaine, CNRS UPR 2147, 75014 Paris, France.
Am J Phys Anthropol. 2006 Sep;131(1):64-72. doi: 10.1002/ajpa.20405.
The reproductive cycles of 23 captive olive baboons were studied over two successive parturitions. Interbirth intervals of 450 days were reduced by 60% in comparison to wild baboons, and consisted of 145 days of postpartum amenorrhea, 3.5 cycles, and a gestation of 185 days. Dominance rank was found to be one significant factor affecting female fertility. Low-ranking females had longer total intervals between successive births and, in particular, they experienced a longer delay to conception once they had resumed sexual cycles. Mothers of infants who were heavy for age resumed cycling more quickly and had fewer cycles before a subsequent conception. Mothers best able to sustain rapid early infant growth were those of high dominance rank and of high body mass; these females had more rapid reproductive rates. As female energy intake was unrelated to dominance, we suggest that social stresses are important suppressors of the hormonal and lactational competence of subordinate females.
在连续两次分娩期间，对23只圈养橄榄狒狒的生殖周期进行了研究。与野生狒狒相比，450天的产仔间隔缩短了60%，包括145天的产后闭经、3.5个周期以及185天的妊娠期。优势等级被发现是影响雌性生育能力的一个重要因素。低等级雌性连续分娩之间的总间隔时间更长，尤其是在恢复性周期后，她们受孕的延迟时间更长。年龄较大但体重较重的婴儿的母亲恢复排卵更快，在随后受孕前的周期更少。最能维持婴儿早期快速生长的母亲是优势等级高和体重高的雌性；这些雌性的生殖率更高。由于雌性的能量摄入与优势等级无关，我们认为社会压力是下属雌性激素和泌乳能力的重要抑制因素。
