Rules of death across ontogeny in sexually dimorphic mammals
Rules of death across ontogeny in sexually dimorphic mammals
批准号:
2052497
负责人:
Roxanne Beltran
金额:
$120.35万
依托单位国家:
美国
项目类别:
Continuing Grant
财政年份:
2021
资助国家:
美国
项目状态:
未结题
起止时间:
2021-10-01 至 2025-09-30
中文摘要
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英文摘要
In many animals, males are notably larger, forage in different habitats, and experience higher mortality than females. Although physiological constraints, behavioral strategies, and predator-prey interactions have been proposed as possible links between body size and mortality, their relative importance is unknown. This project will determine the benefits and consequences of large body size in northern elephant seals, in which adult males are 6x larger than females. Diving abilities and food requirements will be quantified and compared between males and females from birth to age four. During their foraging migrations, each seal will carry a newly-developed biologger that transmits data on diving behavior, migration route, and feeding success via satellites even if animals die at sea. Identifying the mechanisms that drive differences in foraging habitat and mortality rates between males and females will transform our understanding of top predators including marine mammals and birds that exert strong influences on ecosystems around the world. The project will also build research capacity among students traditionally underrepresented in biology and provide education opportunities for K-12 students and the public through an interactive animal tracking website. For sexually size dimorphic species, it is unknown how ecological processes such as starvation and predation act upon the disparate physiological and behavioral phenotypes of males and females. This project aims to determine how male and female body size differences throughout ontogeny lead to divergent use of the risk-reward landscape. Male and female northern elephant seals will be anesthetized, measured, weighed, instrumented, and sampled from birth through age four. The resulting data will link three biological disciplines: physiological measurements of diving development and energy demands, behavioral partitioning of 3-dimensional space use and diet due to physiological constraints, and ecological consequences of variation in physiology and niche partitioning. A meta-analysis across all seal, sea lion, and walrus species will be used to evaluate how sex-specific mortality rates correlate with the degree of polygyny and sexual size dimorphism more broadly. Together, these aims will determine how ecological risk and reward interact with physiological constraints to drive the ontogenetic development of behavioral strategies in sexually dimorphic mammals.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.
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DOI:
10.1126/science.adf0566
发表时间:
2023-04-21
期刊:
SCIENCE
影响因子:
56.9
作者:
[Kendall-Bar, Jessica M., Williams, Terrie M., Costa, Daniel P.]
通讯作者:
Costa, Daniel P.
Physiological tipping points in the relationship between foraging success and lifetime fitness of a long‐lived mammal
长寿哺乳动物觅食成功与终生健康之间关系的生理临界点
DOI:
10.1111/ele.14193
发表时间:
2023
期刊:
Ecology Letters
影响因子:
8.8
作者:
[Beltran, Roxanne S., Hernandez, Keith M., Condit, Richard, Robinson, Patrick W., Crocker, Daniel E., Goetsch, Chandra, Kilpatrick, A. Marm, Costa, Daniel P.]
通讯作者:
Costa, Daniel P.
The Elephant Seal: Linking Phenotypic Variation with Behavior and Fitness in a Sexually Dimorphic Phocid.
象海豹:将表型变异与性二态性福西德的行为和健康联系起来。
DOI:
--
发表时间:
2022
期刊:
Springer
影响因子:
--
作者:
[Beltran, R.S.]
通讯作者:
Beltran, R.S.
A unifying framework for understanding ecological and evolutionary population connectivity
理解生态和进化种群连通性的统一框架
DOI:
10.3389/fevo.2023.1072825
发表时间:
2023
期刊:
Frontiers in Ecology and Evolution
影响因子:
3
作者:
[Cramer, Alli N., Hoey, Jennifer A., Dolan, Tara E., Gatins, Remy, Toy, Jason A., Chancellor, Jordan L., Palkovacs, Eric P., Garza, John Carlos, Beltran, Roxanne S.]
通讯作者:
Beltran, Roxanne S.
Field-based Undergraduate Training: Utilizing Research for Equity (FUTURE) in Biology
-
批准号:2329523
-
项目类别:Standard Grant
-
资助金额:$124.88万
-
财政年份:2024
-
负责人:Roxanne Beltran
-
依托单位:
NSF Postdoctoral Fellowship in Biology FY 2018
-
批准号:1811400
-
项目类别:Fellowship Award
-
资助金额:$13.8万
-
财政年份:2018
-
负责人:Roxanne Beltran
-
依托单位:
国内基金
海外基金
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