NDLI: Locomotion and attachment of leaf beetle larvae Gastrophysa viridula (Coleoptera, Chrysomelidae)

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Locomotion and attachment of leaf beetle larvae Gastrophysa viridula (Coleoptera, Chrysomelidae)

Content Provider	PubMed Central
Author	Zurek, Daniel B. Gorb, Stanislav N. Voigt, Dagmar
Copyright Year	2014
Abstract	While adult green dock leaf beetles Gastrophysa viridula use tarsal adhesive setae to attach to and walk on smooth vertical surfaces and ceilings, larvae apply different devices for similar purposes: pretarsal adhesive pads on thoracic legs and a retractable pygopod at the 10th abdominal segment. Both are soft smooth structures and capable of wet adhesion. We studied attachment ability of different larval instars, considering the relationship between body weight and real contact area between attachment devices and the substrate. Larval gait patterns were analysed using high-speed video recordings. Instead of the tripod gait of adults, larvae walked by swinging contralateral legs simultaneously while adhering by the pygopod. Attachment ability of larval instars was measured by centrifugation on a spinning drum, revealing that attachment force decreases relative to weight. Contributions of different attachment devices to total attachment ability were investigated by selective disabling of organs by covering them with melted wax. Despite their smaller overall contact area, tarsal pads contributed to a larger extent to total attachment ability, probably because of their distributed spacing. Furthermore, we observed different behaviour in adults and larvae when centrifuged: while adults gradually slipped outward on the centrifuge drum surface, larvae stayed at the initial position until sudden detachment.
Related Links	http://dx.doi.org/10.1098/rsfs.2014.0055
Starting Page	20140055
File Format	PDF
ISSN	20428898
e-ISSN	20428901
Journal	Interface Focus
Issue Number	1
Volume Number	5
Language	English
Publisher	The Royal Society
Publisher Date	2014-12-19
Access Restriction	Open
Rights Holder	The Royal Society
Subject Keyword	Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Biomaterials Biochemistry Biophysics Bioengineering Biomedical Engineering Biotechnology

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Data from: Locomotion and attachment of leaf beetle larvae Gastrophysa viridula (Coleoptera, Chrysomelidae) (Dataset)

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