Tongue adhesion in the horned frog Ceratophrys sp.
Tongue adhesion in the horned frog Ceratophrys sp.
复制标题
角蛙 Ceratophrys sp. 的舌头粘连。
DOI：
10.1038/srep05225
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发表时间：
2014-06-12
影响因子：
4.6
通讯作者：
Gorb SN
中科院分区：
文献类型：
--
作者：
Kleinteich T;Gorb SN
众所周知，青蛙用它们突出的粘性舌头捕捉难以捉摸的猎物。然而，青蛙舌头的粘附性以及与猎物接触形成的机制尚不清楚。在这里，我们首次测量了角蛙(Ceratophrys sp.)活体个体的粘附力和舌头接触面积。对抗玻璃。我们发现Ceratoprys sp.产生的粘附力远远超过其自身的重量。令人惊讶的是，我们发现在喂养试验中，舌头粘着得更强，在这些试验中，舌头接触粘液的区域的覆盖率相对较低。因此，除了粘液的存在外，蛙舌的其他特征(表面轮廓、材料特性)对于产生足够的粘附力是重要的。总体而言，实验数据表明，青蛙舌头可以与压敏胶粘剂(PSA)相比，后者在技术上通常用作胶带或标签。
Frogs are well-known to capture elusive prey with their protrusible and adhesive tongues. However, the adhesive performance of frog tongues and the mechanism of the contact formation with the prey item remain unknown. Here we measured for the first time adhesive forces and tongue contact areas in living individuals of a horned frog (Ceratophrys sp.) against glass. We found that Ceratophrys sp. generates adhesive forces well beyond its own body weight. Surprisingly, we found that the tongues adhered stronger in feeding trials in which the coverage of the tongue contact area with mucus was relatively low. Thus, besides the presence of mucus, other features of the frog tongue (surface profile, material properties) are important to generate sufficient adhesive forces. Overall, the experimental data shows that frog tongues can be best compared to pressure sensitive adhesives (PSAs) that are of common technical use as adhesive tapes or labels.