RUI: Mechanisms Regulating Facultative Migrations of the Pine Siskin

RUI：调节松黄雀兼性迁徙的机制

• 批准号: 1756976
• 负责人: Heather Watts
• 金额: $ 17.38万
• 依托单位: Washington State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-08-16 至 2020-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1756976&HistoricalAwards=false
• 关键词: RUI; Mechanisms; Regulating; Facultative; Migrations

Proposal Title: RUI: Mechanisms regulating facultative migrations of the Pine SiskinInstitutions: Loyola Marymount University, and a partnership with UC-DavisAbstract Date: 03/13/2015Migratory behavior can be characterized by regular and predictable seasonal and directional movements, or the movements may be much less predictable with respect to both timing and direction. The less predictable movements, known as facultative migration, are much more difficult to study. This project will investigate the drivers of facultative migration in a captive species of bird, the pine siskin (Spinus pinus). The goals of the project are to assess 1) What cue(s) trigger the development of a migratory stage; and 2) What endocrine hormones mediate the migratory response? Four cues (photoperiod, food availability, population density, and mate availability) and two hormones (corticosterone and testosterone) will be investigated. Understanding how animals respond to environmental variability is critical in today's changing climate. The project will train a post-graduate researcher at a primarily undergraduate institution, and will involve large numbers of undergraduates, including those from underrepresented groups. The lead investigator is a beginning investigator.The project will systematically and comprehensively investigate the mechanisms underlying facultative migration, a suite of behaviors that are taxonomically widespread. It is the captive avian model organism that enables this research. Four different hypotheses will be investigated as part of the first goal of the project: (i) an increasing photoperiod stimulates facultative migration in the spring; (ii) declining food availability stimulates the development
of migration; (iii) high local population density, prior to a decline in food availability, can trigger the transition to a migratory
 stage; and (iv) that a shortage of potential mates can stimulate migration around the time of breeding. Two additional hypotheses will be investigated as part of the second goal: (i) increased circulating corticosterone levels stimulate 
the development of a migratory stage; and (ii) the transition to a migratory stage is stimulated
 by increased circulating testosterone levels. Experiments will include manipulating the environmental triggers and tracking behavioral and physiological responses, and direct manipulation of the endocrine hormones. The combined approaches will provide significant opportunities for research training at a primarily undergraduate institution. The team will work with the Loyola Marymount University Center for Urban Resilience to develop and disseminate materials to be used in Los Angeles area schools.

研究机构：洛约拉玛丽蒙特大学，并与加州大学戴维斯分校合作摘要日期：2015年3月13日迁移行为的特征可以是有规律和可预测的季节性和方向性运动，或者这些运动在时间和方向上都难以预测。难以预测的迁移，被称为兼性迁移，研究起来要困难得多。本项目将调查一种圈养鸟类的兼性迁移的驱动因素，松siskin （Spinus pinus）。该项目的目标是评估1)什么线索触发了迁移阶段的发展；2)哪些内分泌激素介导迁移反应？四种线索（光周期、食物可得性、种群密度和配偶可得性）和两种激素（皮质酮和睾酮）将被调查。在当今不断变化的气候中，了解动物如何对环境变化做出反应至关重要。该项目将在一所主要为本科生的机构培训一名研究生研究员，并将涉及大量本科生，包括来自代表性不足群体的本科生。首席调查员是一名初级调查员。该项目将系统和全面地研究兼性迁移的机制，这是一套在分类学上广泛存在的行为。正是圈养的鸟类模式生物使这项研究成为可能。作为该项目的第一个目标的一部分，将研究四种不同的假设：(i)增加的光周期刺激春季的兼性迁移；（ii）粮食供应的减少刺激了发展&amp；#8232；迁移;（iii）在食物供应下降之前，当地人口密度高，可能引发向迁徙的过渡；阶段;(4)潜在配偶的缺乏会刺激繁殖期间的迁徙。作为第二个目标的一部分，将研究另外两个假设：(i)循环皮质酮水平升高刺激；迁徙阶段的发展；（ii）促进向迁移阶段的过渡&amp；#8232；通过增加循环睾酮水平。实验将包括操纵环境触发因素，跟踪行为和生理反应，以及直接操纵内分泌激素。综合的方法将为主要的本科院校提供重要的研究培训机会。该团队将与洛约拉玛丽蒙特大学城市韧性中心合作，开发和传播用于洛杉矶地区学校的材料。

项目成果

Social environment influences termination of nomadic migration

社会环境影响游牧迁徙的终止

• DOI: 10.1098/rsbl.2022.0006
• 发表时间: 2022
• 期刊: Biology Letters
• 影响因子: 3.3
• 作者: Robart, Ashley R.;Zuñiga, Hilary X.;Navarro, Guillermo;Watts, Heather E.
• 通讯作者: Watts, Heather E.

Seasonal Patterns of Fat Deposits in Relation to Migratory Strategy in Facultative Migrants

• DOI: 10.3389/fevo.2021.691808
• 发表时间: 2021-06-29
• 期刊: FRONTIERS IN ECOLOGY AND EVOLUTION
• 影响因子: 3
• 作者: Cornelius, Jamie M.;Hahn, Thomas P.;Watts, Heather E.
• 通讯作者: Watts, Heather E.