THE CONTRIBUTIONS OF LOCAL HEATING AND REDUCING EXPOSED SURFACE-AREA TO THE ENERGETIC BENEFITS OF HUDDLING BY SHORT-TAILED FIELD VOLES (MICROTUS-AGRESTIS)
THE CONTRIBUTIONS OF LOCAL HEATING AND REDUCING EXPOSED SURFACE-AREA TO THE ENERGETIC BENEFITS OF HUDDLING BY SHORT-TAILED FIELD VOLES (MICROTUS-AGRESTIS)
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DOI：
10.1086/physzool.65.4.30158537
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发表时间：
1992-07-01
期刊：
影响因子：
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通讯作者：
RACEY, PA
中科院分区：
文献类型：
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作者：
HAYES, JP;SPEAKMAN, JR;RACEY, PA
许多小型哺乳动物靠挤在一起来节省能量。挤在一起减少了暴露在当地环境中的集体表面积，并可能使当地环境变热。因此，挤在一起可以节省能源，但减少裸露面积和局部供暖的相对重要性在很大程度上没有文献记载。在低于中温的温度范围内，测量了由五个个体组成的黑线田鼠群体的耗氧量。同时记录动物的行为。每组在允许挤在一起时和在代谢室中的隔板阻止挤在一起时进行测量。无论是挤在一起还是分开，环境的局部加热都与代谢室外的温度(外部温度)相关，但挤在一起的局部加热明显更大。在0摄氏度的情况下，挤在一起和分开的群体的局部供暖分别为11.8摄氏度和5.8摄氏度。在相同的室外温度下，聚集组的耗氧量比分开的组低(在零下温度下低23%)。在0摄氏度的情况下，局部供暖约占抱团组总节能的55%。因此，当地供暖是与挤在一起相关的能源节约的主要组成部分。
Many small mammals save energy by huddling. Huddling reduces the collective surface area exposed to the local environment and may heat the local environment. Consequently, huddling groups save energy, but the relative importance of reducing exposed surface area and local heating is largely undocumented. Oxygen consumption was measured in groups of Microtus agrestis Linnaeus consisting of five individuals, over a range of temperatures below thermoneutrality. Behavior was recorded simultaneously. Each group was measured when allowed to huddle and when prevented from huddling by partitions in the metabolism chamber. Local heating of the environment was correlated with temperature outside the metabolism chamber (outside temperature)for both huddling and separated groups, but local heating by huddling groups was significantly greater. At 0-degrees-C, local heating was 11.8-degrees-C and 5.8-degrees-C for huddling and separated groups, respectively. At the same outside temperature, O2 consumption of huddling groups was lower than for separated groups (23% lower at 0-degrees-C). At 0-degrees-C, local heating accounted for about 55% of the total energy savings of the huddling group. Thus, local heating is a major component of the energy savings associated with huddling.