Socioendocrinology of Cooperative Breeding

合作育种社会内分泌学

• 批准号: 9723842
• 负责人: Jeffrey French
• 金额: $ 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: 1997
• 资助国家: 美国
• 起止时间: 1997-09-15 至 2001-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9723842&HistoricalAwards=false
• 关键词: Socioendocrinology; Cooperative; Breeding

9723842 French Among mammals, infant care is commonly limited to maternal care. However, in a small proportion of species, fathers and other group members contribute to the care and provisioning of dependent infants (paternal and alloparental care, respectively). Although we know much about the patterning of this care, little attention has been directed toward the underlying mechanisms that regulate the delivery of parental care by individuals other than the mother. The studies proposed will examine the physiological and experiential determinants of parental care in the black tufted-ear marmoset (Callithrix kuhli). In the marmoset, maternal effort is limited essentially to nursing, and adult males and older offspring provide the majority of care to dependent infants. Initial observations indicate that older sons and fathers living in family groups undergo breast elaboration in the presence of infants, suggesting an endocrine involvement in infant care by males. Through the use of unobtrusive behavioral observations and noninvasive urine sample collection, French will test the degree to which responsiveness to infants and levels of parental behavior are affected by gonadal steroids (estrogen, progesterone, and testosterone) and pituitary peptides (prolactin). The generality or specificity of the physiological responses to infants will be tested by comparing the endocrine responses of both marmosets and squirrel monkeys (a non-paternal species) to infant-associated stimuli. Further, the strength of the social attachment between male and female partners, assumed to be critical for the evolution of male parental care, will be tested by providing pairs with a variety of threats to the integrity of the pair (e.g., temporary separations, encounters with strangers). Together, these projects will provide insights into the mechanisms that control responsiveness to infants and adult social partners in a species characterized by high levels of male parenta l care and strong heterosexual relationships.

9723842在哺乳动物中，婴儿护理通常仅限于孕产妇护理。 但是，在一小部分物种中，父亲和其他群体成员有助于抚养和提供抚养婴儿（分别为父亲和同种护理）。 尽管我们对这种护理的模式有很多了解，但很少关注基本机制，这些机制调节母亲以外的个人提供父母护理的交付。 提出的研究将检查黑色簇绒果仁糖（Callithrix kuhli）中父母护理的生理和经验决定因素。在马尔莫斯特（Marmoset）中，孕产妇的努力基本上仅限于护理，而成年男性和年龄较大的后代则为抚养婴儿提供了大部分护理。 最初的观察结果表明，在婴儿存在下，生活在家庭群体中的年龄较大的儿子和父亲会经历乳房阐述，这表明男性对婴儿护理的内分泌参与。 通过使用不引人注目的行为观察和非侵入性尿液样本收集，法语将测试对婴儿的反应性和父母行为水平受性腺类固醇（雌激素，孕酮和睾丸激素）和垂体肽（催乳素）影响的程度。通过比较果冻和松鼠猴（一种非生产物种）与婴儿相关刺激的内分泌反应，可以测试对婴儿的生理反应的一般性或特异性。 此外，假定对男性父母护理的演变至关重要的男性和女性伴侣之间的社会依恋力量将通过对两人完整性的各种威胁（例如，临时分离，与陌生人的遇到）进行测试。 这些项目将共同提供有关控制婴儿和成人社会伴侣的机制，这些机制以高水平的男性父母护理和牢固的异性恋关系为特征的物种。