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Selected Publication:

Type of publication: Journal Article
Type of document: Full Paper

Year: 2001

Authors: Wochesländer, R; Gumpenberger, M; Weisgram, J

Title: Intraoral Food Transport in Testudo hermanni (Chelonia, Cryptodira) - a Radiographic Video Analysis.

Source: Netherlands Journals of Zoology (50), 4 445-454.

Authors Vetmeduni Vienna:

Gumpenberger Michaela

Vetmed Research Units
University Clinic for Small Animals, Clinical Unit of Diagnostic Imaging

Project(s): Feeding patterns in chelonians

The kinematics of intraoral food transport of Testudo hermanni were investigated by radiographic video analysis. Small lead markers and contrastmedia marked food pellets were used to describe the movements of the hyolingual apparatus, the jaws, and the food passage during feeding events. The feeding cycle is divided into food uptake, several intraoral transport cycles, and finally swallowing of the food. The results show features of a terrestrial feeder highly adapted to herbivorous diet: usage of tongue during ingestion, tongue-based intraoral transport combined with food manipulation prior to swallowing. The tongue of T. hermanni is equipped with long papillae and numerous lingual glands. Roughness of the tongue surface and sticky saliva produce interlocking forces acting on the food which facilitate food uptake, transport, and manipulation. Cineradiographic analysis enables complete documentation of the food passage during feeding events and, combined with conventional video recordings, allows more valid statements about the kinematics of feeding mechanisms.

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