Short and hyperthermic torpor responses in the Malagasy bat Macronycteris commersoni reveal a broader hypometabolic scope in heterotherms
Short and hyperthermic torpor responses in the Malagasy bat Macronycteris commersoni reveal a broader hypometabolic scope in heterotherms
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马达加斯加蝙蝠的短暂和高温麻木反应揭示了异温动物更广泛的低代谢范围
DOI:
10.1007/s00360-018-1171-4
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发表时间:
2018
期刊:
影响因子:
--
通讯作者:
Dausmann KH
中科院分区:
文献类型:
--
作者:
Reher S;Ehlers J;Rabarison H ;Dausmann KH
The energy budgets of animal species are closely linked to their ecology, and balancing energy expenditure with energy acquisition is key for survival. Changes in animals’ environments can be challenging, particularly for bats, which are small endotherms with large uninsulated flight membranes. Heterothermy is a powerful response used to cope with changing environmental conditions. Recent research has revealed that many tropical and subtropical species are heterothermic and display torpor with patterns unlike those of “classical” heterotherms from temperate and arctic regions. However, only a handful of studies investigating torpor in bats in their natural environment exist. Therefore, we investigated whether the Malagasy batMacronycteris commersonienters torpor in the driest and least predictable region in Madagascar. We examined the energy balance and thermal biology ofM. commersoniin the field by relating metabolic rate (MR) and skin temperature (Tskin) measurements to local environmental characteristics in the dry and rainy seasons.Macronycteris commersonientered torpor and showed extreme variability in torpor patterns, including surprisingly short torpor bouts, lasting on average 20 min, interrupted by MR peaks. Torpid MR was remarkably low (0.13 ml O2h−1g−1), even whenTskinexceeded that of normothermia (41 °C).Macronycteris commersoniis thus physiologically capable of (1) entering torpor at high ambient temperature andTskinand (2) rapidly alternating between torpid and normothermic MR resulting in very short bouts. This suggests that the scope of hypometabolism amongst heterothermic animals is broader than previously assumed and underlines the importance of further investigation into the torpor continuum.
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作者:
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DOI:
--
发表时间:
2015
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Water Quality, Exposure and Health
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--
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期刊:
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DOI:
10.1007/s00360-011-0609-8
发表时间:
2011
期刊:
Journal of Comparative Physiology B
影响因子:
--
作者:
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通讯作者:
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作者:
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