The endocrine mechanism regulating stopover refueling and departure in avian migrants

候鸟迁徙中途加油和离境的内分泌机制

• 批准号: 323729697
• 负责人: Dr. Cas Eikenaar, Ph.D.
• 金额: --
• 依托单位: Institut für Vogelforschung - Vogelwarte Helgoland (IfV)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/323729697?language=en
• 关键词: endocrine; mechanism; regulating; stopover; refueling

In birds successful completion of migration and timely arrival at the breeding or wintering grounds requires rapid refueling at stopover sites and departing from stopover at the appropriate time. Whereas the factors influencing the rate of refueling and departure from stopover are well known, our understanding, and even identification, of the physiological mechanism(s) involved in these crucial processes is very limited. I propose to substantially increase the limited knowledge of the endocrine mechanisms involved in refueling and departure from stopover, key behaviors of avian migration. First, by manipulating circulating corticosterone level I will test the causality of the correlations observed between corticosterone and both refueling rate and stopover departure likelihood. Second, I will investigate whether the hormone ghrelin is involved in up-regulating corticosterone level in migrants that are ready to depart. Specifically, I will determine whether a) corticosterone and ghrelin levels are positively correlated in migrants at stopover, and b) ghrelin levels increase towards departure from stopover.

在鸟类中，成功完成迁徙并及时到达繁殖地或越冬地需要在中途停留地快速加油，并在适当的时候离开中途停留地。虽然影响加油率和中途停留起飞率的因素是众所周知的，但我们对这些关键过程中所涉及的生理机制的理解，甚至识别都非常有限。我建议大幅增加有限的知识，内分泌机制参与加油和中途停留，鸟类迁徙的关键行为。首先，通过操纵循环皮质酮水平，我将测试皮质酮和加油率和中途停留离开可能性之间观察到的相关性的因果关系。第二，我将调查激素ghrelin是否参与上调准备离开的移民的皮质酮水平。具体来说，我将确定是否a）皮质酮和生长激素释放肽水平是正相关的移民在中途停留，和B）生长激素释放肽水平增加对离开中途停留。

项目成果

Endocrine regulation of fueling by hyperphagia in migratory birds

• DOI: 10.1007/s00359-017-1152-1
• 发表时间: 2017-07-01
• 期刊: JOURNAL OF COMPARATIVE PHYSIOLOGY A-NEUROETHOLOGY SENSORY NEURAL AND BEHAVIORAL PHYSIOLOGY
• 影响因子: 2.1
• 作者: Eikenaar, Cas

Ghrelin, corticosterone and the resumption of migration from stopover, an automated telemetry study

• DOI: 10.1016/j.physbeh.2018.06.036
• 发表时间: 2018-10-01
• 期刊: PHYSIOLOGY & BEHAVIOR
• 影响因子: 2.9
• 作者: Eikenaar, Cas;Hessler, Sven;Kaiya, Hiroyuki
• 通讯作者: Kaiya, Hiroyuki

Diel variation in corticosterone and departure decision making in migrating birds

• DOI: 10.1016/j.yhbeh.2020.104746
• 发表时间: 2020-06-01
• 期刊: HORMONES AND BEHAVIOR
• 影响因子: 3.5
• 作者: Eikenaar, Cas;Schaefer, Jana;Schmaljohann, Heiko
• 通讯作者: Schmaljohann, Heiko

Endocrine regulation of migratory departure from stopover: Evidence from a longitudinal migratory restlessness study on northern wheatears

• DOI: 10.1016/j.yhbeh.2018.01.008
• 发表时间: 2018-03-01
• 期刊: HORMONES AND BEHAVIOR
• 影响因子: 3.5
• 作者: Eikenaar, Cas;Mueller, Florian;Stoewe, Mareike
• 通讯作者: Stoewe, Mareike