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Leaf beetle attachment on wrinkles: isotropic friction on anisotropic surfaces

Titelangaben

Voigt, Dagmar ; Schweikart, Alexandra ; Fery, Andreas ; Gorb, Stanislav:
Leaf beetle attachment on wrinkles: isotropic friction on anisotropic surfaces.
In: Journal of Experimental Biology. Bd. 215 (2012) Heft 11 . - S. 1975-1982.
ISSN 0022-0949
DOI: https://doi.org/10.1242/jeb.068320

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Link zum Volltext (externe URL): Volltext

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 mu m wavelength. On other wrinkled substrates, forces were significantly reduced in both males and females compared with the smooth, flat control, with the minimum force achieved on wrinkles with a wavelength of 911 nm.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Institutionen der Universität: Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie > Ehemalige Professoren > Lehrstuhl Physikalische Chemie II - Univ.-Prof. Dr. Andreas Fery
Fakultäten
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie > Lehrstuhl Physikalische Chemie II
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie > Ehemalige Professoren
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 500 Naturwissenschaften
500 Naturwissenschaften und Mathematik > 530 Physik
500 Naturwissenschaften und Mathematik > 540 Chemie
Eingestellt am: 05 Dec 2014 10:10
Letzte Änderung: 05 Dec 2014 10:10
URI: https://eref.uni-bayreuth.de/id/eprint/3964