Torpor and activity patterns in free-ranging sugar gliders Petaurus breviceps (Marsupialia)
Torpor and activity patterns in free-ranging sugar gliders Petaurus breviceps (Marsupialia)
复制标题
DOI：
10.1007/s004420051021
复制
发表时间：
2000-05-01
期刊：
影响因子：
2.7
通讯作者：
Geiser, F
中科院分区：
文献类型：
--
作者：
Körtner, G;Geiser, F
几乎所有关于哺乳动物日常麻痹的研究都是在实验室中恒定的环境条件下进行的。我们调查了自由放养的糖滑翔机（Petaurus breviceps，100克）的麻痹和活动模式，使用温度遥测技术，并将现场数据与实验室中获得的公开信息进行了比较。从秋季到春季，对12只糖滑翔机的体温和/或皮肤温度以及活动模式进行了监测。健康的糖滑翔机在日落和日出之间活动，但在寒冷或下雨的夜晚活动大幅减少。状况不佳的动物偶尔会在白天觅食。对11架滑翔机进行了8-171天的监测，所有这些滑翔机都进入了每日休眠状态：103天（占观察日的17%）观察到休眠，通常发生在下雨或寒冷的夜晚，休眠频率随季节而变化。麻痹发作持续2至23小时（平均13小时），体温降至最低10.4摄氏度。因此，与对同一物种进行的实验室研究相比，休眠的深度、时间和频率都要高得多。我们的研究表明，寒冷或潮湿的条件下减少觅食野生糖滑翔机，他们雇用日常麻木定期在恶劣天气。这表明，在糖滑翔机中，通过使用麻痹来最大限度地减少能量损失是它们在野外生存的关键。
Almost all studies on daily torpor in mammals have been conducted in the laboratory under constant environmental conditions. We investigated torpor and activity patterns in free-ranging sugar gliders (Petaurus breviceps, 100 g) using temperature telemetry and compared field data with published information obtained in the laboratory. Body and/or skin temperature and activity patterns of 12 sugar gliders were monitored from autumn to spring. Healthy sugar gliders were active between sunset and sunrise, but on cold or rainy nights activity was substantially reduced. Animals in poor condition occasionally foraged during the day. Eleven gliders were monitored for 8-171 days and all of these entered daily torpor: Torpor was observed on 103 days (17% of observation days), usually occurred on rainy or cold nights, and frequency of torpor changed with season. Torpor bouts lasted between 2 and 23 h (average 13 h) and the body temperature fell to a minimum of 10.4 degrees C. Torpor was thus much deeper, longer and more frequent than in laboratory studies on the same species. Our study shows that cold or wet conditions curtail foraging in wild sugar gliders and that they employ daily torpor regularly during adverse weather. This Suggests that minimisation of energy loss by the use of torpor in sugar gliders is pivotal for their survival in the wild.