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北极繁殖的歌鸟在剧烈的活动中会过热,即使在低空气温度下也是如此
Ryan S O'Connor1,2,3,4, Oliver P Love5, Lyette Régimbald6
1Département de Biologie, Chimie et Géographie, Université du Québec à Rimouski, 300 Allée des Ursulines, Rimouski, QC, G5L 3A1, Canada. oconn163@gmail.com.
Scientific reports
|July 2, 2024
概括
北极鸟类,如雪,在活动中风险过热,即使在温和的温度. 升高的体温需要改变行为,可能会损害小的生存.
科学领域:
- 生理学 生理学 生理学
- 生态生态学 生态生态学
- 动物行为 动物行为
背景情况:
- 鸟类具有高的内热体温,可以耐受热量,但将边缘缩小到致命水平.
- 北极鸟类的高体温可能会限制持续的活动,由于过热的风险,可能会影响繁殖成功.
研究的目的:
- 为了研究增加活动对北极雪 (Plectrophenax nivalis) 的体温的影响.
- 为了确定环境空气温度和体温在雪地活动期间的变化之间的关系.
- 评估这些发现对北极鸟类的行为温度调节和生殖性能的影响.
主要方法:
- 活动水平的实验操纵 (平静与飞行) 在被囚禁的雪地.
- 测量个人体温变化在自然环境空气温度 (-15至36°C) 的范围内.
- 分析活动期间空气温度和体温之间的关系.
主要成果:
- 宁静的雪地带保持了体温在39.9°C和42.6°C之间.
- 活动在几分钟内显著增加了体温.
- 身体温度与空气温度呈正相关性 (斜率=0.04°C/°C).
- 飞行带在9°C的环境温度下达到≥45°C的温度,接近临界热极限.
结论:
- 在活动期间,北极雪在活动期间接近临界热极限,特别是在更温暖的环境温度下.
- 有限的蒸发式冷却能力需要行为温度调节,可能会损害生殖成功.
- 这些发现支持了对影响北极环境中幼生长和生存的行为调整的预测.
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