迁徙策略和饮食影响鸟在耐力飞行期间的新陈代谢
Susanne Jenni-Eiermann1, Lukas Jenni1
1Swiss Ornithological Institute Sempach Switzerland.
Ecology and evolution
|April 17, 2025
概括
鸟类的迁徙策略和饮食对飞行期间的燃料消耗有很大影响. 长距离夜间迁徙的高脂肪储存的果食者最适合在耐力飞行中使用脂肪.
科学领域:
- 鸟类生态学 鸟类生态学
- 代谢生理学 代谢生理学
- 进化生物学是进化的生物学.
背景情况:
- 鸟类迁徙涉及到不同的策略,飞行距离和飞行节长.
- 耐力飞行主要依赖于脂肪,补充蛋白质,燃料使用受到饮食和迁移战术的影响.
研究的目的:
- 研究迁徙策略,饮食和体脂如何影响迁徙鸟的新陈代谢特征.
- 了解迁徙飞行期间燃料利用的适应情况.
主要方法:
- 在瑞士阿尔卑斯山山口捕获了30种夜间和昼间迁徙的流浪鸟在自然迁徙飞行期间.
- 在迁徙和不活跃的同物种之间比较血代谢物度 (脂肪,蛋白质和碳水化合物代谢的指标).
- 研究了迁移策略,饮食和脂肪储存对这些代谢物的影响.
主要成果:
- 迁移策略 (白天/夜晚,短途/长途) 和饮食显著影响了代谢物水平,身体脂肪储存有额外的影响.
- 夜间迁徙者和果食者表现出更高的甘油三和自由脂肪酸水平,表明脂肪利用率更高.
- 昆虫类动物的尿酸和葡萄糖水平较高,这表明它们更依赖蛋白质和碳水化合物.
- 日间迁徙的短距离迁徙者 (昆虫食者,花食者) 使用的蛋白质或糖原比夜间迁徙者多.
- 果食者和长途移徙者表现出最大限度的脂肪利用.
结论:
- 迁徙的流浪鸟表现出不同的燃料使用策略,这些策略是基于它们的迁徙策略,饮食和脂肪储备.
- 长距离夜间迁徙的果食者具有大量的脂肪负载,是最佳适应以脂肪为基础的耐力飞行.
- 这些发现凸显了鸟类对迁徙需求的代谢可塑性.
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