Socioendocrinology of Cooperative Offspring Care

合作后代护理的社会内分泌学

• 批准号: 0091030
• 负责人: Jeffrey French
• 金额: $ 41.18万
• 依托单位: University of Nebraska at Omaha
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-03-01 至 2006-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0091030&HistoricalAwards=false
• 关键词: Socioendocrinology; Cooperative; Offspring; Care

Exclusive offspring care by females is the norm among mammals, but among a small set of species, males and other group members also play an important and potentially crucial role in the nurturing of dependent offspring. Among marmosets and tamarins, primates of the New World, care by all group members, including the mother, father, and nonbreeding juveniles and subadults, is the norm for social groups. Results from previous NSF funding have revealed important differences in levels of effort in infant care by mothers and fathers, with mothers playing a large role in infant care in the first two weeks of life, and fathers and helpers playing a central role in the 3rd and 4th weeks of infant life and beyond. These changes are associated with variations in testosterone (T) concentrations in mothers and fathers: T is reduced in mothers in the first 2 weeks post partum and in fathers during the second 2 weeks post partum, which corresponds to the highest rates of infant care. The studies outlined in the current proposal will utilize both observational and experimental approaches to the possibility that variation in testosterone concentrations helps regulate responsiveness to infants in marmosets, and whether T mediates a trade-off in effort in infant care versus reproductive and/or aggressive behaviors, which may be incompatible with infant care. The results will shed light on the possibility that complex affiliative and caregiving behaviors in social primates may, in part, be influenced by biological states, as well as experience-related factors.

雌性专门照顾后代是哺乳动物中的常态，但在一小部分物种中，雄性和其他群体成员在抚养后代方面也发挥着重要且潜在的关键作用。 在狨猴和狨猴（新世界的灵长类动物）中，所有群体成员（包括母亲、父亲、非繁殖期的幼年和亚成体）的照顾是社会群体的常态。 美国国家科学基金会之前的资助结果显示，母亲和父亲在婴儿护理方面的努力程度存在显着差异，母亲在婴儿出生后最初两周的护理中发挥着重要作用，而父亲和帮助者在婴儿出生后的第三周和第四周及以后发挥着核心作用。 这些变化与母亲和父亲睾酮 (T) 浓度的变化有关：母亲的睾酮 (T) 浓度在产后前 2 周内降低，而父亲则在产后后 2 周内降低，这对应于最高的婴儿护理率。 当前提案中概述的研究将利用观察和实验方法来探讨睾酮浓度的变化有助于调节狨猴对婴儿的反应的可能性，以及T是否介导婴儿护理与生殖和/或攻击行为之间的权衡，这可能与婴儿护理不相容。 研究结果将揭示社会灵长类动物复杂的亲和和照顾行为可能部分受到生物状态以及经验相关因素影响的可能性。