Spontaneous daily torpor in Malagasy mouse lemurs
Spontaneous daily torpor in Malagasy mouse lemurs
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DOI：
10.1007/s001140050344
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发表时间：
1997-01-01
影响因子：
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通讯作者：
Ganzhorn, JU
中科院分区：
文献类型：
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作者：
Ortmann, S;Heldmaier, G;Ganzhorn, JU
冬眠和日常的麻木是生活在温和或亚北极气候中的小型哺乳动物节省能量的有力工具[1-6]，但热带小型哺乳动物，特别是灵长类动物，可能不需要这种麻木状态。然而，在马达加斯加干燥森林的研究中，我们经常观察到两种鼠狐猴（Microcebus murinus和M. myoxinus，将其保持在靠近诱捕地点的室外笼中。麻痹的特征是几乎90%的代谢抑制和体温（Tb）接近环境温度的下降。记录的最低Tb为15.48 C。从麻木中恢复体温需要额外的能量。然而，在狐猴中，这些能量成本是最小的，因为它们使用了环境温度的日常增加，并在每次麻痹发作结束时被动地重新升温。
Hibernation and daily torpor are powerful tools for saving energy in small mammals inhabiting moderate or subarctic climates [1–6], but tropical small mammals, in particular primates, may not require such states of torpidity. However, during our studies in the Malagasy dry forest we regularly observed daily torpor in two species of mouse lemurs, Microcebus murinus and M. myoxinus, which were kept in outdoor cages close to the trapping site. Torpor is characterized by a metabolic depression of almost 90% and a decrease in body temperature (Tb) close to ambient temperature. The lowest Tb recorded was 15.48 C. Endogenous rewarming from torpor requires additional energy. However, in lemurs, these energy costs were minimal because they used the regular daily increase in ambient temperature and rewarmed passively at the end of each torpor episode.