Geometrical aspects of the energetic effectiveness of huddling in small mammals
Geometrical aspects of the energetic effectiveness of huddling in small mammals
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DOI：
10.4098/at.arch.97-32
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发表时间：
1997-09-01
影响因子：
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通讯作者：
Bozinovic, F
中科院分区：
文献类型：
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作者：
Canals, M;Rosenmann, M;Bozinovic, F
小型哺乳动物由于蜷缩而导致的能量消耗减少主要归因于蜷缩群体的表面积/体积比减小。在这里，我们提出了一个模型来解释减少的相对暴露面积的分组动物和减少的代谢率在蜷缩。我们试图从机械上解释如何改变节能可能运作。我们将我们的模型应用于通过分组可变形体获得的结果，以及对四种小型哺乳动物蜷缩的耗氧量的实验室测量，我们发现蜷缩的能量效率存在少量多样性。我们估计，平均相对面积在拥挤的损失范围在28.7%和39.1%之间。在所研究的物种中，平均蜷缩效率为42%，这是小型哺乳动物能量/物质预算的一个重要部分，特别是在冬季条件下。
Reduced energy expenditure resulting from huddling in small mammals is mainly attributed to the reduced surface area/volume ratio of the huddling group. Here we propose a model to account for the reduction of the relative exposed area of grouped animals and for the diminution of metabolic rate during huddling. We attempt to explain mechanistically how changes in energy savings may operate. We applied our model to results obtained by grouping deformable bodies, and also laboratory measurements of oxygen consumption on huddling small mammals of four species, We found a small amount of diversity in the energetic efficiency of huddling. We estimate that the average relative area lost during huddling ranged between 28.7 and 39.1%. The average huddling effectiveness in the studied species was 42%, which is a significant fraction of the energy/matter budget of a small mammal, especially under winter conditions.