Dissertation Research: Physiological Mediation of an Age-related Life History Trade-off

论文研究:与年龄相关的生活史权衡的生理调节

基本信息

  • 批准号:
    0508693
  • 负责人:
  • 金额:
    --
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2005
  • 资助国家:
    美国
  • 起止时间:
    2005-04-01 至 2007-12-31
  • 项目状态:
    已结题

项目摘要

Adults are predicted to increase reproductive investment with age. This is thought to occur because as adults age, they necessarily have fewer future reproductive attempts. Several studies support this expectation, however, we currently have little information about the physiological mechanisms mediating this commonly observed pattern. One physiological mechanism that may be important in regulating age-related changes in parental investment is the attenuation of the stress response and decreased sensitivity to elevated glucocorticoid levels. In response to stress, vertebrates release glucocorticoids. Elevated glucocorticoid levels inhibit reproductive behaviors and enhance self-maintenance behaviors. Therefore, adults are predicted to suppress the stress response and to be less behaviorally sensitive to elevated glucocorticoid levels with age. This study will investigate whether changes in the stress response and glucocorticoid sensitivity mediate age-related changes in parental investment in a long-lived seabird, the common tern Sterna hirundo. This research will enhance our understanding of the relationship between stress physiology and age as well as our understanding of the physiological mechanisms mediating age-related life-history trade-offs.Broader Impacts: Undergraduate researchers will be involved in all aspects of this research project. In addition, this research may have important conservation implications. Knowledge about how age influences the stress response may inform wildlife managers about which segments of the population are the most vulnerable to environmental disturbance.
据预测,随着年龄的增长,成年人的生殖投资会增加。这被认为是因为随着成年人年龄的增长,他们未来的生育尝试必然会减少。一些研究支持这一预期,然而,我们目前对调节这种普遍观察到的模式的生理机制知之甚少。调节与年龄相关的父母投资变化的一个重要生理机制是压力反应的减弱和对糖皮质激素水平升高的敏感性降低。作为对压力的反应,脊椎动物会释放糖皮质激素。糖皮质激素水平升高会抑制生殖行为,增强自我维持行为。因此,随着年龄的增长,成年人预计会抑制应激反应,并对糖皮质激素水平的升高不那么敏感。这项研究将调查应激反应和糖皮质激素敏感性的变化是否中介了长寿海鸟--普通燕尾羽的父母投资的年龄相关变化。这项研究将加深我们对压力生理学与年龄之间的关系的理解,以及我们对年龄相关生活史权衡的生理机制的理解。广泛的影响:本科生研究人员将参与本研究项目的各个方面。此外,这项研究可能具有重要的保护意义。了解年龄是如何影响压力反应的,可能会让野生动物管理者知道哪些种群最容易受到环境干扰的影响。

项目成果

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Ellen Ketterson其他文献

Highly variable movements by Andean Flamingos ( Phoenicoparrus andinus ): implications for conservation and management
安第斯火烈鸟(Phoenicoparrus andinus)的高度变化的运动:对保护和管理的影响
  • DOI:
  • 发表时间:
    2023
  • 期刊:
  • 影响因子:
    1.4
  • 作者:
    Alex Jahn;Joaquín Cereghetti;Michael Hallworth;Ellen Ketterson;Brandt Ryder;Peter Marra;E. Derlindati
  • 通讯作者:
    E. Derlindati

Ellen Ketterson的其他文献

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{{ truncateString('Ellen Ketterson', 18)}}的其他基金

EAGER: Novel Ultralight Sensors for Avian Migration and Movement Studies
EAGER:用于鸟类迁徙和运动研究的新型超轻传感器
  • 批准号:
    1644717
  • 财政年份:
    2016
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
DISSERTATION RESEARCH: Hormonal Regulation of Feather Color Development and Variation across Populations
论文研究:不同种群羽毛颜色发展和变化的荷尔蒙调节
  • 批准号:
    1601386
  • 财政年份:
    2016
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Dissertation Research: Sick in the city? Hosts and parasites in urban and non-urban habitats
论文研究:在城市生病了?
  • 批准号:
    1406496
  • 财政年份:
    2014
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Collaborative Research: Adaptive plasticity, timing, and population divergence in a songbird species
合作研究:鸣禽物种的适应性可塑性、时间安排和种群分化
  • 批准号:
    1257474
  • 财政年份:
    2013
  • 资助金额:
    --
  • 项目类别:
    Continuing Grant
DISSERTATION RESEARCH: Individual variation and male-female dimorphism: the role of testosterone and gene expression
论文研究:个体变异和男女二态性:睾酮和基因表达的作用
  • 批准号:
    1209564
  • 财政年份:
    2012
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
OPUS: Synthesizing research on the adaptable snowbird: hormonal pleiotropy, phenotypic integration, and rapid population divergence
OPUS:适应性雪鸟的综合研究:激素多效性、表型整合和快速种群分化
  • 批准号:
    1119924
  • 财政年份:
    2011
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
DISSERTATION RESEARCH: The function and speciation potential of short- and long-range song in dark-eyed juncos
论文研究:黑眼灯笼草短程和长程鸣叫的功能和物种形成潜力
  • 批准号:
    1011145
  • 财政年份:
    2010
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
DISSERTATION RESEARCH: Coordination of testosterone-mediated phenotypes and underlying endocrine mechanisms across divergent populations of the dark-eyed junco (J. hyemalis)
论文研究:黑眼灯笼草(J. hyemalis)不同种群中睾酮介导的表型和潜在内分泌机制的协调
  • 批准号:
    0909834
  • 财政年份:
    2009
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Doctoral Dissertation Research: Androgyny & Androgens in Females: Relating Hormones to the Evolution of Sexual Dimorphism
博士论文研究:雌雄同体
  • 批准号:
    0910036
  • 财政年份:
    2009
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
DISSERTATION RESEARCH: Extra-pair behavior and female fitness in the dark-eyed junco (Junco hyemalis)
论文研究:黑眼灯笼草 (Junco hyemalis) 的额外配对行为和雌性适应性
  • 批准号:
    0808051
  • 财政年份:
    2008
  • 资助金额:
    --
  • 项目类别:
    Standard Grant

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