DISSERTATION RESEARCH: Transition to Independence: Exploring an Extreme Life History

论文研究：向独立的过渡：探索极端的生活史

• 批准号: 0808479
• 负责人: Creagh Breuner
• 金额: $ 1.2万
• 依托单位: University of Montana
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-07-01 至 2009-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0808479&HistoricalAwards=false
• 关键词: DISSERTATION; RESEARCH; Transition; Independence; Exploring

PI BreunerProposal # IOS 0808479Doctoral Dissertation Research: Transition to Independence- Exploring theExtreme Life History of AlbatrossesIn species with parental care, transition to independence is the first true test of individual fitness. In many birds, leaving the nest (1) ends parental care, (2) requires an abrupt transition from immobility to sustained flight, and (3) requires learning to forage. In light of these requirements, it is not surprising that age and condition at departure can influence future survival and reproductive success. What proximate triggers do fledglings use to time this important life-history transition? Past studies have focused either on morphological, energetic, or endocrine correlates of fledging. This proposal addresses proximate triggers of fledging, integrating measures of morphology, energetic reserves, and endocrine physiology in a long-lived seabird, the Laysan Albatross. Further, hormone levels and food availability will be manipulated to experimentally address interactions between energetics, body mass, food delivery, and glucocorticoid hormones. The combination of strategies will allow for experimental evaluation of fledging behavior within a physiological framework. Broader impacts include strong conservation biology implications. Laysan Albatross have been identified as one of a number of indicator species for the seabird colonies of the NWHI and are a major consumer of marine resources, so their reproductive success is reflective of the health and status of the oceans. Knowledge of the mechanisms and effects of physiological changes during fledging will aid in both understanding the mechanisms of behavior and the informed management of long-lived oceanic seabirds.

PI Breuner Proposal # IOS 0808479博士论文研究：过渡到独立-探索信天翁的极端生活史在有父母照顾的物种中，过渡到独立是个体适应性的第一个真正考验。 在许多鸟类中，离开巢（1）结束父母的照顾，（2）需要从静止到持续飞行的突然转变，（3）需要学习觅食。 鉴于这些要求，出发时的年龄和状况会影响未来的生存和生殖成功率，这并不奇怪。 雏鸟用什么样的最接近的触发器来确定这一重要的生命史转变的时间？ 过去的研究集中在形态，精力充沛，或内分泌相关的羽翼未丰。这项建议解决了近触发器的羽翼丰满，整合措施的形态，精力充沛的储备，和内分泌生理在长寿的海鸟，莱桑信天翁。 此外，激素水平和食物供应将被操纵，以实验方式解决能量，体重，食物输送和糖皮质激素之间的相互作用。 策略的组合将允许在生理框架内对羽翼未丰的行为进行实验评估。 更广泛的影响包括强烈的保护生物学影响。Laysan信天翁已被确定为NWHI海鸟群的一系列指标物种之一，是海洋资源的主要消费者，因此它们的繁殖成功反映了海洋的健康和状况。 了解雏鸟发育过程中生理变化的机制和影响，将有助于了解行为机制和对长寿海洋海鸟的知情管理。