Efficiency of uphill locomotion in nocturnal and diurnal lizards
Efficiency of uphill locomotion in nocturnal and diurnal lizards
复制标题
夜间和白天蜥蜴的上坡运动效率
DOI：
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发表时间：
1996
影响因子：
2.8
通讯作者：
Emshwiller
中科院分区：
文献类型：
--
作者：
Farley;Emshwiller
夜间活动的壁虎在平地上行走比白天活动的蜥蜴更经济。夜行壁虎运动成本低的一个假设是，它们在运动过程中比其他蜥蜴更有效地进行机械功。为了验证这一假设，我们比较了效率的夜间壁虎Coleonyx variegatus（平均体重4.2克）和日间石龙子skiltonianus（平均体重4.8克）时，他们在上坡运动进行垂直的工作。我们测量了每种动物在一定速度范围内走在平地上和50度斜坡上时的耗氧率。对于Coleonyx variegatus，能量成本的旅行单位距离（最低成本的运输，Cmin）从1.5增加到2.7毫升O2 kg-1 m-1之间的水平和上坡运动。对于Eumeces skiltonianus，Cmin从2.5增加到4.7毫升O2 kg-1 m-1之间的水平和上坡运动。通过计算水平和上坡运动的Cmin之间的差异，我们发现在运动过程中进行垂直做功的效率对于Coleonyx variegatus为37%，对于Eumeces skiltonianus为19%。垂直效率的1.9倍差异和水平地面运输成本的1.7倍差异之间的相似性与夜行壁虎比其他蜥蜴运动成本低的假设一致，因为它们可以在运动过程中更有效地进行机械工作。
Nocturnal geckos can walk on level ground more economically than diurnal lizards. One hypothesis for why nocturnal geckos have a low cost of locomotion is that they can perform mechanical work during locomotion more efficiently than other lizards. To test this hypothesis, we compared the efficiency of the nocturnal gecko Coleonyx variegatus (average body mass 4.2 g) and the diurnal skink Eumeces skiltonianus (average body mass 4.8 g) when they performed vertical work during uphill locomotion. We measured the rate of oxygen consumption when each species walked on the level and up a 50 slope over a range of speeds. For Coleonyx variegatus, the energetic cost of traveling a unit distance (the minimum cost of transport, Cmin) increased from 1.5 to 2.7 ml O2 kg-1 m-1 between level and uphill locomotion. For Eumeces skiltonianus, Cmin increased from 2.5 to 4.7 ml O2 kg-1 m-1 between level and uphill locomotion. By taking the difference between Cmin for level and uphill locomotion, we found that the efficiency of performing vertical work during locomotion was 37 % for Coleonyx variegatus and 19 % for Eumeces skiltonianus. The similarity between the 1.9-fold difference in vertical efficiency and the 1.7-fold difference in the cost of transport on level ground is consistent with the hypothesis that nocturnal geckos have a lower cost of locomotion than other lizards because they can perform mechanical work during locomotion more efficiently.
影响因子：
56.9
作者：
BIEWENER, AA
通讯作者：
BIEWENER, AA