Do migratory birds need stopovers for physiological recovery?

候鸟需要中途停留进行生理恢复吗？

• 批准号: 433146546
• 负责人: Dr. Cas Eikenaar, Ph.D.
• 金额: --
• 依托单位: Institut für Vogelforschung - Vogelwarte Helgoland (IfV)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2019
• 资助国家: 德国
• 起止时间: 2018-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/433146546?language=en
• 关键词: Do; migratory; birds; need; stopovers

Most migrating birds, especially nocturnal migrants, cannot reach their final migratory goal in a single flight and thus have to make stopovers to accumulate new fuel. Stopovers are also commonly thought of as periods during which migrants 'rest' or recover from migratory endurance flight; however, what such rest and recovery encompasses is not well known. As a consequence of nocturnal endurance flight, migrants build up a sleep debt and experience a shift in the balance between damaging pro-oxidants and protective antioxidants towards the former. Therefore it seems plausible that these physiological functions need to be recovered during stopover. I propose to significantly further our understanding of the functions that stopovers have for migrating birds by testing whether (i) migrants can boost their physiological state (oxidative balance and/or sleep) while at stopover, and (ii) the decision to depart from stopover to resume migration is affected by the bird’s physiological state. Hereto, I will collect longitudinal data on oxalic acid concentrations (a bio-marker of sleep debt) and the oxidative balance of migrants at stopover as well as link these to departure decisions.

大多数候鸟，特别是夜间候鸟，不能在一次飞行中达到最终的迁徙目标，因此必须中途停留以积累新的燃料。中途停留也通常被认为是移徙者“休息”或从移徙耐力飞行中恢复的时期;然而，这种休息和恢复包括什么并不为人所知。作为夜间耐力飞行的结果，移民建立了睡眠债务，并经历了破坏性促氧化剂和保护性抗氧化剂之间的平衡向前者的转变。因此，这些生理功能需要在中途停留期间恢复似乎是合理的。我建议显着进一步了解的功能，中途停留的候鸟通过测试是否（一）移民可以提高他们的生理状态（氧化平衡和/或睡眠），而在中途停留，和（二）决定离开中途停留，恢复迁移是受鸟的生理状态。在此，我将收集草酸浓度（睡眠债的生物标志物）和移民在中途停留时的氧化平衡的纵向数据，并将这些数据与离境决定联系起来。