Landing on branches in the frog Trachycephalus resinifictrix (Anura: Hylidae).
Landing on branches in the frog Trachycephalus resinifictrix (Anura: Hylidae).
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DOI：
10.1007/s00359-016-1069-0
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发表时间：
2016-04
期刊：
影响因子：
--
通讯作者：
Kleinteich T
中科院分区：
文献类型：
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作者：
Bijma NN;Gorb SN;Kleinteich T
青蛙（Lissamphibia：Anura）以其跳跃或跳跃运动而闻名，这与该群体特有的许多解剖学特化有关。然而，虽然对青蛙起飞的生物力学进行了详细研究，但对青蛙跳跃后如何落地的了解却少之又少。除了陆地和水生物种外，一些青蛙谱系采用树栖生活方式，尤其是降落在具有挑战性、小型且不可预测的基质（例如树叶或树枝）上的生物力学几乎是未知的。在这里，我们研究了树栖青蛙 Trachycephalus resesifictrix（Hylidae）在模仿小树枝的木棍上的着陆运动学。我们观察到两种不同的着陆行为：（1）腹部着陆和（2）前肢或后肢的脚趾附着。在后一种情况下，青蛙绕着棍子进行侧手翻，而它们仅通过粘性趾垫附着。我们估计在这种行为过程中作用在脚趾上的力高达动物体重的十四倍。这种行为证明了脚趾垫的卓越粘合能力和青蛙的身体控制能力。本文的在线版本 (doi:10.1007/s00359-016-1069-0) 包含补充材料，可供授权用户使用。
Frogs (Lissamphibia: Anura) are famous for their saltatory or hopping locomotion, which is related to numerous anatomical specialisations that are characteristic for the group. However, while the biomechanics of take-off in frogs have been studied in detail, much less is known on how frogs land after a jump. Besides terrestrial and aquatic species, several lineages of frogs adopted an arboreal lifestyle and especially the biomechanics of landing on challenging, small, and unpredictable substrates, such as leaves or branches, are virtually unknown. Here we studied the landing kinematics of the arboreal frog Trachycephalus resinifictrix (Hylidae) on a wooden stick that was used to mimic a small tree branch. We observed two different landing behaviours: (1) landing on the abdomen and (2) attachment with the toes of either the forelimb or the hindlimb. In the latter case, the frogs performed a cartwheel around the stick, while they were only attached by their adhesive toe pads. We estimated the forces that act on the toes during this behaviour to be up to fourteen times the body weight of the animals. This behaviour demonstrates the remarkable adhesive capabilities of the toe pads and the body control of the frogs. The online version of this article (doi:10.1007/s00359-016-1069-0) contains supplementary material, which is available to authorized users.