LTREB: Lifetime Fitness Consequences of Reproductive Strategies

LTREB：生殖策略的终生健康后果

基本信息

批准号：
0743152
负责人：
James Sedinger
金额：
$ 59.92万
依托单位：
Board of Regents, NSHE, obo University of Nevada, Reno
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2008
资助国家：
美国
起止时间：
2008-04-01 至 2014-03-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0743152&HistoricalAwards=false
关键词：
LTREB Lifetime Fitness Consequences Reproductive

项目摘要

This project uses a long-term study of individually-marked Black Brant Geese in Alaska to understand how producing young in a given year affects an individual's future ability to produce young. Female geese expend substantial nutrients to produce and incubate a clutch of eggs and to care for their broods. Because geese store and deplete nutrients on time scales of several months, use of nutrients for one reproductive attempt may reduce their availability for future reproductive efforts. Nutrient use during reproduction may also reduce future adult survival. Studies of senescence suggest that use of nutrients during reproduction inhibits maintenance at the cellular level and results in earlier senescence. This study relies on substantial numbers of individuals older than 20 years to study impacts of reproductive effort early in life on senescent decline. The number of Black Brant Geese breeding in Alaska has declined over the past four decades. This study provides principal data used by managers to understand factors influencing population size and dynamics. Data from this project have been influential in management of this species on the Yukon Delta National Wildlife Refuge and throughout their range. Investigators also work closely with local Yupik native residents of western Alaska and employ young people from Chevak, the nearest village.

该项目对阿拉斯加单独标记的黑布兰特鹅进行了长期研究，以了解特定年份的产仔如何影响个体未来的产仔能力。雌鹅消耗大量的营养来产下和孵化一窝蛋并照顾它们的孩子。由于鹅会在几个月的时间内储存和消耗营养物质，因此一次繁殖尝试中使用的营养物质可能会减少它们对未来繁殖努力的可用性。繁殖过程中的营养消耗也可能会降低未来成虫的存活率。衰老研究表明，繁殖过程中营养物质的使用会抑制细胞水平的维持并导致较早衰老。这项研究依靠大量 20 岁以上的个体来研究生命早期的生殖努力对衰老衰退的影响。过去四十年来，阿拉斯加黑雁的繁殖数量有所下降。这项研究提供了管理者用来了解影响人口规模和动态的因素的主要数据。该项目的数据对育空三角洲国家野生动物保护区及其整个范围内该物种的管理产生了影响。调查人员还与阿拉斯加西部当地尤皮克原住民密切合作，并雇用来自最近村庄切瓦克的年轻人。