CONSTRUCTION PRINCIPLES OF THE BEAK SKELE TON IN THE HATCHLING

Authors
Citation
T. Bartels et W. Meyer, CONSTRUCTION PRINCIPLES OF THE BEAK SKELE TON IN THE HATCHLING, Journal fur Ornithologie, 134(3), 1993, pp. 301-307
Citations number
8
Language
TEDESCO
art.tipo
Article
Categorie Soggetti
Ornithology
Journal title
ISSN journal
0021-8375
Volume
134
Issue
3
Year of publication
1993
Pages
301 - 307
Database
ISI
SICI code
0021-8375(1993)134:3<301:CPOTBS>2.0.ZU;2-Z
Abstract
The structure of the beak skeleton of hatchlings was analysed using a new direct magnifying X-ray technique. The application of these microf ocus X-ray systems reveals a quite uniform construction of the beak sk eleton in the hatchlings, independent from the mode of development of the bird species groups studied (precocial, altricial etc.). The amoun t of ossification as well as the specific osteoarchitecture of the jaw bones of the beak apparatus - especially in the region of Substantia spongiosa of the Os praemaxillare - may be considered as an anatomical adaptation to mechanical stress of the jaw bones during picking of th e eggshell.