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NSF Postdoctoral Fellowship in Biology FY 2017: Do sick frogs increase reproductive investment? A behavioral and physiological examination of the terminal investment hypothesis

2017 财年 NSF 生物学博士后奖学金：生病的青蛙会增加生殖投资吗？

基本信息

批准号：
1710791
负责人：
Talisin Hammond
金额：
$ 20.7万
依托单位：
Hammond Talisin
依托单位国家：
美国
项目类别：
Fellowship Award
财政年份：
2017
资助国家：
美国
起止时间：
2017-08-01 至 2021-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1710791&HistoricalAwards=false
关键词：
NSF Postdoctoral Fellowship Biology FY

项目摘要

This is an NSF Postdoctoral Research Fellowship in Biology, under the program Broadening Participation of Groups Under-represented in Biology. The fellow, Talisin Hammond, is conducting research and receiving training that increases the participation of groups underrepresented in biology, at the University of Pittsburgh, and is being mentored by Cori Richards-Zawicki (sponsoring scientist). This research explores how the reproductive behavior and physiology of multiple species of frogs is affected by chytridiomycosis, a fungal disease that has decimated many amphibian populations. In addition to improving our understanding of how this disease impacts amphibians, which are currently highly threatened by numerous environmental factors, this work also clarifies the role of sub-lethal effects of disease on population dynamics and evolutionary processes. As part of this project the fellow is working with a natural history museum to teach student groups about science using sketch-noting. The fellow is also designing a research-based educational module, which will be freely available, and is working with an online network to find educators interested in its implementation. Finally, the fellow is mentoring diverse undergraduate students.Wildlife diseases impact populations both directly, through mortality, and indirectly, through sub-lethal changes to host biology. Disease-induced fatalities can be devastating, but sub-lethal changes in behavior and physiology also have the potential to exert substantial pressure on populations. The terminal investment hypothesis, which states that animals with decreasing future reproductive potential should invest more in immediate reproduction, predicts that sick animals with decreased longevity should elevate reproductive effort, and that species with higher susceptibility should increase effort more. The fellow's research is testing this hypothesis, focusing on chytridiomycosis as the disease agent. The processes by which this disease kills amphibians are better-understood than its sub-lethal impacts, and few studies have experimentally described how chytridiomycosis impacts reproductive behavior and physiology. This project uses three congeneric frog species with differing disease susceptibility, using call recordings, behavioral choice tests, and hormonal manipulations in conjunction with quantifications of pathogen load, immune function and spermatic traits to characterize how the disease affects male reproductive behavior and physiology, and female preference. This work is generating novel insights into the role of sub-lethal, disease-mediated behavioral and physiological effects on individuals. In addition to providing training support for the fellow in a new field of study, this work also involves significant outreach, including teaching student groups visiting natural history museums, developing a research-related, online-available educational module, and mentoring diverse undergraduate students.

这是NSF生物学博士后研究奖学金，根据扩大生物学中代表性不足的群体的参与计划。这位名叫塔里辛哈蒙德的研究员正在匹兹堡大学进行研究和接受培训，以增加生物学中代表性不足的群体的参与，并由科里理查兹-扎维奇（赞助科学家）指导。这项研究探讨了多种青蛙的生殖行为和生理如何受到壶菌病的影响，壶菌病是一种导致许多两栖动物种群大量死亡的真菌疾病。除了提高我们对这种疾病如何影响两栖动物的理解外，目前两栖动物受到许多环境因素的高度威胁，这项工作还澄清了疾病的亚致死效应对种群动态和进化过程的作用。作为这个项目的一部分，他正在与一个自然历史博物馆合作，用素描笔记教学生小组科学知识。该研究员还在设计一个基于研究的教育模块，该模块将免费提供，并正在与一个在线网络合作，寻找对其实施感兴趣的教育工作者。最后，这位研究员正在指导不同的本科生。野生动物疾病通过死亡直接影响种群，通过宿主生物学的亚致死变化间接影响种群。疾病引起的死亡可能是毁灭性的，但行为和生理上的亚致死性变化也有可能对人口造成巨大压力。终端投资假说认为，未来生殖潜力下降的动物应该更多地投资于立即繁殖，预测寿命下降的患病动物应该提高生殖努力，易感性较高的物种应该增加更多的努力。这位研究员的研究正在验证这一假设，重点是壶菌病作为疾病的病原体。这种疾病杀死两栖动物的过程比其亚致死影响更容易理解，很少有研究通过实验描述壶菌病如何影响生殖行为和生理。该项目使用三种具有不同疾病易感性的同类青蛙物种，使用呼叫记录，行为选择测试和激素操作，结合病原体负荷，免疫功能和精子性状的定量来表征疾病如何影响雄性生殖行为和生理，以及雌性偏好。这项工作正在产生新的见解亚致死，疾病介导的行为和生理影响对个人的作用。除了在新的研究领域为研究员提供培训支持外，这项工作还涉及重大的推广活动，包括教学生团体参观自然历史博物馆，开发与研究相关的在线教育模块，并指导不同的本科生。

项目成果

期刊论文数量（13）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Physiological and behavioral responses to anthropogenic stressors in a human-tolerant mammal

人类耐受哺乳动物对人为应激源的生理和行为反应

DOI：
10.1093/jmammal/gyz134
发表时间：
2019
期刊：
Journal of Mammalogy
影响因子：
1.7
作者：
Hammond, Talisin T;Vo, Minnie;Burton, Clara T;Surber, Lisa L;Lacey, Eileen A;Smith, Jennifer E
通讯作者：
Smith, Jennifer E

Ecological specialization, variability in activity patterns and response to environmental change

DOI：
10.1098/rsbl.2018.0115
发表时间：
2018-06-01
期刊：
BIOLOGY LETTERS
影响因子：
3.3
作者：
Hammond, Talisin T.;Palme, Rupert;Lacey, Eileen A.
通讯作者：
Lacey, Eileen A.

Using reproductive technologies to assess the development of secondary sexual characteristics, ovarian senescence and hermaphroditism in the endangered mountain yellow-legged frog Rana muscosa

利用生殖技术评估濒危山地黄腿蛙第二性征的发育、卵巢衰老和雌雄同体

DOI：
10.1071/rd21029
发表时间：
2021
期刊：
Fertility and Development
影响因子：
0
作者：
Jacobs, Leah E.;Hammond, Talisin T.;Gaffney, Patricia M.;Curtis, Michelle J.;Shier, Debra M.;Durrant, Barbara S.;Righton, Alison;Williams, Candace L.;Calatayud, Natalie E.
通讯作者：
Calatayud, Natalie E.

Relationships between glucocorticoids and infection with Batrachochytrium dendrobatidis in three amphibian species