CAUSES OF POLYGYNY IN COMMON MARMOSETS

目的了解儿童精神分裂症患者的社会、行为和激素水平 一夫多妻制在绒猴家族中发生的机制。 结果与出生家庭生活在一起的雌性绒猴通常 经历生殖抑制，不能在在场的情况下排卵 母亲的名字。这种抑制的发生是可变的， 然而，由于偶尔有报道称雌性在 与出生的群体一起居住，就像圈养群体和野生群体一样 有时据报道含有两只交配的雌性。在这 研究表明，我们正在检验这样一种假设，即女性会从 对引入的生殖抑制的回应 适当配偶的家庭，即无血缘关系的成年男性。 行为和荷尔蒙数据收集自青春期后的女性 和他们的母亲，在家庭完好无损的时候和之后 用一个不相关的、不熟悉的成年来代替正在繁殖的雄性 男性。初步结果表明，青春期后，无排卵 雌性可以在1-3周内被刺激排卵 介绍一位不相关的男性。此外，这些雌性可能会与 与小说中的男性发生性关系，并最终受孕。 这些发现表明，下级中的生殖失败 雌性绒猴可能不仅通过等级相关的压制来中介 但也因为在出生时缺乏合适的、无关的配偶 一群人。此外，他们还表明，绒猴之间的差异 群体中繁殖雌性的数量可能归因于 群体成员之间的亲缘关系的差异。我们的未来方向 将继续研究神经内分泌和感觉机制 通过引入无血缘关系的男性导致 绒猴子代的生殖功能及其结局 女儿们在这些家庭中的生育尝试。关键词交配 制度，一夫一妻制，生育，社会关系，生殖 压抑，性行为。资助国家自然科学基金IBN-9604321

OBJECTIVE To identify the social, behavioral, and hormonal mechanisms underlying the onset of polygyny in families of marmosets. RESULTS Female marmosets living with the natal family typically undergo reproductive suppression, failing to ovulate in the presence of the mother. The occurrence of such suppression is variable, however, as females have occasionally been reported to ovulate while housed with the natal group, and as both captive and wild groups have sometimes been reported to contain two breeding females. In this study, we are testing the hypothesis that females will escape from reproductive suppression in response to the introduction into the family of an appropriate mate, i.e., an unrelated adult male. Behavioral and hormonal data are collected from post-pubertal females and their mothers both while the family is intact and after replacement of the breeding male by an unrelated, unfamiliar adult male. Preliminary results indicate that post-pubertal, anovulatory females can be stimulated to ovulate in 1-3 weeks following introduction of an unrelated male. Moreover, these females may engage in sexual interactions with the novel male and eventually conceive. These findings indicate that reproductive failure in subordinate female marmosets may be mediated not only by rank-related suppression but also by the lack of appropriate, unrelated mates in the natal group. Moreover, they suggest that differences between marmoset groups in the number of breeding females may be attributable to differences in the relatedness of group members. FUTURE DIRECTIONS We will continue to investigate the neuroendocrine and sensory mechanisms by which introduction of an unrelated male leads to the onset of reproductive function in marmoset daughters, and the outcome of daughtersU reproductive attempts in these families. KEY WORDS mating systems, monogamy, fertility, social relationships, reproductive suppression, sexual behavior. FUNDING NSF IBN-9604321