Walking and running in the desert ant Cataglyphis fortis
Walking and running in the desert ant Cataglyphis fortis
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在沙漠中行走和奔跑的蚂蚁 Cataglyphis fortis
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
Matthias Wittlinger
中科院分区：
文献类型：
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作者：
Verena Wahl;S. Pfeffer;Matthias Wittlinger
路径整合虽然本质上容易出错，但却是动物中常见的导航策略，特别是在环境定向线索很少的情况下。沙漠蚂蚁 Cataglyphis fortis 就是一个突出的例子，它们在觅食时会长途跋涉。步幅积分器可能是路径积分误差的主要来源。因此，对 Cataglyphis 行走行为的详细分析对于评估可能的错误来源和潜在的补偿策略非常重要。 Zollikofer (J Exp Biol 192:95–106, 1994a) 展示了 Cataglyphis 中三脚架步态的一致使用，并提出出乎意料的恒定步长作为减少导航错误的可能方法。在这里，我们通过对大范围步行速度下的步行行为进行更详细的分析来扩展这些研究。步幅随步行速度线性增加，中腿的步幅略有线性增加。随着步行速度的增加，在较低的速度下观察到摆动阶段持续时间的初始减少。然后它在行为相关的步行速度范围内保持恒定。通过缩短站立阶段和站立阶段重叠来提高步行速度。当速度大于 370 mms−1 时，步频趋于平稳，占空因数降至 0.5 以下，并且 Cataglyphis 过渡到空中阶段运行。
Path integration, although inherently error-prone, is a common navigation strategy in animals, particularly where environmental orientation cues are rare. The desert ant Cataglyphis fortis is a prominent example, covering large distances on foraging excursions. The stride integrator is probably the major source of path integration errors. A detailed analysis of walking behaviour in Cataglyphis is thus of importance for assessing possible sources of errors and potential compensation strategies. Zollikofer (J Exp Biol 192:95–106, 1994a) demonstrated consistent use of the tripod gait in Cataglyphis, and suggested an unexpectedly constant stride length as a possible means of reducing navigation errors. Here, we extend these studies by more detailed analyses of walking behaviour across a large range of walking speeds. Stride length increases linearly and stride amplitude of the middle legs increases slightly linearly with walking speed. An initial decrease of swing phase duration is observed at lower velocities with increasing walking speed. Then it stays constant across the behaviourally relevant range of walking speeds. Walking speed is increased by shortening of the stance phase and of the stance phase overlap. At speeds larger than 370 mms−1, the stride frequency levels off, the duty factor falls below 0.5, and Cataglyphis transitions to running with aerial phases.
影响因子：
2.8
作者：
Reinhardt, Lars;Blickhan, Reinhard
通讯作者：
Blickhan, Reinhard