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 法语 在哺乳动物中，婴儿护理通常仅限于产妇护理。 然而，在一小部分物种中，父亲和其他群体成员为照顾和提供受抚养婴儿做出贡献（分别为父亲和异亲照顾）。 尽管我们对这种照顾的模式了解很多，但很少有人关注调节母亲以外的个人提供父母照顾的基本机制。 拟议的研究将检查黑簇耳狨猴（Callithrix kuhli）父母照顾的生理和经验决定因素。在狨猴中，母亲的努力基本上仅限于哺乳，成年雄性和年长的后代为受抚养的婴儿提供大部分护理。 初步观察表明，生活在家庭群体中的大儿子和父亲在婴儿在场的情况下进行乳房精加工，这表明内分泌参与了男性的婴儿护理。 通过使用不显眼的行为观察和无创尿液样本采集，French 将测试性腺类固醇（雌激素、孕激素和睾酮）和垂体肽（催乳素）对婴儿的反应和父母行为水平的影响程度。通过比较狨猴和松鼠猴（非父系物种）对婴儿相关刺激的内分泌反应，可以测试对婴儿生理反应的普遍性或特异性。 此外，男性和女性伴侣之间的社会依恋的强度被认为对男性父母照顾的演变至关重要，将通过向伴侣提供对伴侣完整性的各种威胁（例如，暂时分离、遭遇）来进行测试。和陌生人）。 总之，这些项目将深入了解控制对婴儿和成年社会伙伴的反应的机制，该物种以高水平的男性父母照顾和牢固的异性关系为特征。