Universität zu Köln

Blickhan, Reinhard, Weihmann, Tom ORCID: 0000-0002-6628-1816 and Barth, Friedrich G. ORCID: 0000-0001-9195-435X (2021). Measuring strain in the exoskeleton of spiders-virtues and caveats. J. Comp. Physiol. A -Neuroethol. Sens. Neural Behav. Physiol., 207 (2). S. 191 - 205. HEIDELBERG: SPRINGER HEIDELBERG. ISSN 1432-1351

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Abstract

The measurement of cuticular strain during locomotion using foil strain gauges provides information both on the loads of the exoskeleton bears and the adaptive value of the specific location of natural strain detectors (slit sense organs). Here, we critically review available literature. In tethered animals, by applying loads to the metatarsus tip, strain and mechanical sensitivity (S = strain/load) induced at various sites in the tibia were determined. The loci of the lyriform organs close to the tibia-metatarsus joint did not stand out by high strain. The strains induced at various sites during free locomotion can be interpreted based on S and, beyond the joint region, on beam theory. Spiders avoided laterad loading of the tibia-metatarsus joint during slow locomotion. Balancing body weight, joint flexors caused compressive strain at the posterior and dorsal tibia. While climbing upside down strain measurements indicate strong flexor activity. In future studies, a precise calculation and quantitative determination of strain at the sites of the lyriform organs will profit from more detailed data on the overall strain distribution, morphology, and material properties. The values and caveats of the strain gauge technology, the only one applicable to freely moving spiders, are discussed.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Blickhan, Reinhard UNSPECIFIED UNSPECIFIED UNSPECIFIED Weihmann, Tom UNSPECIFIED orcid.org/0000-0002-6628-1816 UNSPECIFIED Barth, Friedrich G. UNSPECIFIED orcid.org/0000-0001-9195-435X UNSPECIFIED
URN:	urn:nbn:de:hbz:38-579071
DOI:	10.1007/s00359-020-01458-y
Journal or Publication Title:	J. Comp. Physiol. A -Neuroethol. Sens. Neural Behav. Physiol.
Volume:	207
Number:	2
Page Range:	S. 191 - 205
Date:	2021
Publisher:	SPRINGER HEIDELBERG
Place of Publication:	HEIDELBERG
ISSN:	1432-1351
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language Behavioral Sciences; Neurosciences; Physiology; Zoology Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/57907