Leaf beetle attachment on wrinkles: isotropic friction on anisotropic surfaces

The Journal of Experimental Biology
D VoigtStanislav N Gorb

Abstract

The influence of surface roughness on the attachment ability of insects has been repeatedly reported. In previous experiments, complex surface topographies were used as test substrates, whereas periodical structures have so far been neglected. In the present study, traction experiments with adult beetles Gastrophysa viridula and Leptinotarsa decemlineata were carried out to study the influence of surfaces, structured with periodical wrinkles, on insect attachment. Force measurements were carried out on male and female insects, both intact and after removal of claws, performing tethered walking on five polydimethylsiloxane substrates: (i) smooth, non-structured (control), (ii-v) structured with wrinkles of different wavelengths (366, 502, 911 and 25,076 nm). In two test series, beetles walked either perpendicular or parallel to the wrinkle alignment. Adults of G. viridula produced generally higher forces than those of L. decemlineata. The results show that the alignment of wrinkles had no significant influence on the force generation by beetles, probably because of the skewed position of their tarsomeres relative to the substrates. In both sexes, the highest force values were obtained on surfaces with wrinkles of 25 μm wavelengt...Continue Reading

References

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Citations

Mar 20, 2014·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Philipp Bußhardt, Stanislav N Gorb
Jun 13, 2014·Journal of the Royal Society, Interface·Ying ChenKai-Jung Chi
Jan 21, 2016·Proceedings of the National Academy of Sciences of the United States of America·David LabonteWalter Federle
Nov 17, 2017·Journal of the Royal Society, Interface·Sophie Marie GernayTristan Gilet
May 10, 2019·Integrative and Comparative Biology·Emily R Naylor, Timothy E Higham
Oct 11, 2017·Royal Society Open Science·Dagmar VoigtMichael Varenberg
May 7, 2020·Journal of the Royal Society, Interface·Antonio IazzolinoTristan Gilet
Mar 19, 2020·Ecology and Evolution·Rishab PillaiLin Schwarzkopf
Oct 23, 2020·Frontiers in Zoology·Rishab PillaiLin Schwarzkopf
Apr 15, 2014·ACS Applied Materials & Interfaces·Kosuke SuzukiTakuya Ohzono

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