Tongue adhesion in the horned frog Ceratophrys sp

Kleinteich, Thomas and Gorb, Stanislav (2014) Tongue adhesion in the horned frog Ceratophrys sp Scientific Reports, 4 .

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Abstract

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.

Document Type: Article
Additional Information: Times Cited: 0 0
Research affiliation: Kiel University
OceanRep > The Future Ocean - Cluster of Excellence
Refereed: Yes
ISSN: 2045-2322
Projects: Future Ocean
Date Deposited: 30 Mar 2015 12:21
Last Modified: 03 Nov 2016 12:30
URI: http://eprints.uni-kiel.de/id/eprint/27751

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