Archiv/Abstracts 2004

Schildkröten im Fokus, Bergheim 1 (1): 12-19

Hans-Jürgen Bidmon

Die Inkubation von beschädigten Eiern und die Versorgung bei Schlupfproblemen

Incubation of shell damaged eggs and cure after hatching problems

Abstract

Slightly damaged eggs with some cracks in the outer calcified shell are frequently observed when digging out hard-shelled eggs from the nests of tortoises or certain turtles. An easy method is described on how such eggs can be prepared for successful incubation by sealing the cracks with wax. Attention has to be paid to the excessive loss of humidity during the incubation of the eggs in order to prove the quality of the seal and to avoid dehydration. The limitations of the methods are discussed. In addition, problems which have been sometimes observed during development and hatching from „over-calcified“ tortoise eggs are described. Special attention is given to infections of the yolk sac and their cure. Finally, detailed histology of a Geochelone elegans hatchling is provided to visualizing the internal extensions of the yolk sac in relation to the other organs and in order to show clearly that infections of the sac could easily spread into many adjacent organs resulting in death.

Key words

Testudines, artificial incubation, damaged hard-shelled eggs, yolk sac, histology

Author

Hans-Jürgen Bidmon
E-Mail: hjb@hirn.uni-duesseldorf.de

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