Dissertation Research: Foraging Ecology of Procellariiform Seabirds: Impacts on Reproduction and Life History

论文研究：原状海鸟的觅食生态学：对繁殖和生活史的影响

• 批准号: 9972651
• 负责人: Daniel Costa
• 金额: $ 1万
• 依托单位: University of California-Santa Cruz
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-06-01 至 2001-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9972651&HistoricalAwards=false
• 关键词: Dissertation; Research; Foraging; Ecology; Procellariiform

Foraging behavior of wandering albatrosses is unprecedented among seabirds. They forage throughout the Southern Ocean with trips lasting up to 50 days and covering a total distance of 15,000 kilometers. The PIs will study the energy costs and specific activities associated with foraging in adult wandering albatross. This will allow assessment of the costs associated with specific behaviors so that their importance in reproduction can be evaluated. A variety of tracking techniques will be used such as Isotopic tracers, satellite transmitters along with activity recorders to determine; 1) if parents adjust their energy expenditure by changing their foraging effort, 2) if differences in the use of foraging habitat by males versus females results in different energy expenditures for each, and 3) assessment whether foraging strategies are influenced by flight behavior and, if so, can energy expenditure be linked to differences in flight dynamics. This study will provide a comprehensive view of foraging to address the central question of how foraging strategies impact the ability of adults to rear offspring. In all multicellular organisms, adults must differentially allocate resources toward self-maintenance, growth, and investment in reproduction. All of these life history parameters are intimately linked to foraging. Hence, the unpredictability of foraging in a pelagic environment such as the Southern Ocean has shaped the reproductive strategies of pelagic seabirds like the wandering albatross. This species provides an opportunity to investigate the link between foraging, reproduction, and life history.

漂泊信天翁的觅食行为在海鸟中是前所未有的。 它们在整个南大洋觅食，行程长达 50 天，总行程达 15,000 公里。 PI 将研究成年漂泊信天翁的能量成本和与觅食相关的特定活动。 这将允许评估与特定行为相关的成本，以便评估它们在繁殖中的重要性。 将使用各种跟踪技术，例如同位素示踪剂、卫星发射器以及活动记录器来确定； 1) 父母是否通过改变觅食努力来调整能量消耗，2) 雄性和雌性对觅食栖息地的使用差异是否会导致不同的能量消耗，3) 评估觅食策略是否受到飞行行为的影响，如果是的话，能量消耗是否与飞行动态的差异有关。这项研究将提供对觅食的全面看法，以解决觅食策略如何影响成年人抚养后代的能力这一核心问题。在所有多细胞生物中，成年人必须有差别地分配资源用于自我维持、生长和繁殖投资。 所有这些生活史参数都与觅食密切相关。 因此，在南大洋等远洋环境中觅食的不可预测性影响了漂泊信天翁等远洋海鸟的繁殖策略。 该物种提供了研究觅食、繁殖和生活史之间联系的机会。