The variation of the cross-sectional shape in the long bones of birds and mammals
Identifieur interne : 000F50 ( Main/Exploration ); précédent : 000F49; suivant : 000F51The variation of the cross-sectional shape in the long bones of birds and mammals
Auteurs : Jorge Cubo [Espagne] ; Adrià Casinos [Espagne]Source :
- Annales des Sciences Naturelles Zoologie et Biologie Animale [ 0003-4339 ] ; 1998.
English descriptors
Abstract
Abstract: The transverse and sagittal diameters of the long bones were measured in a sample of 53 species of eutherian mammals and 36 species of birds. The scaling of the transverse and sagittal diameters of each bone to body mass was calculated. For each bone the ratio of sagittal/transverse diameter was calculated, as an expression of the cross-sectional shape of the bones. The distributions of the ratios were not significantly different from normality in all the avian bones and in the mammalian femur and tibia. In most cases, the mean of the distribution was significantly different from 1 (circular shape). The analysis shows that changes in the ratio can be caused by selective factors, considering the correlation predicted between the breaking moments and the radii, but at the same time the cross-sectional shape of mammalian and avian long bones may have a phylogenetic basis. Finally, the previous assumption of relationship between bone curvature and stress predictability, is also discussed.
Url:
DOI: 10.1016/S0003-4339(98)80134-2
Affiliations:
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The scaling of the transverse and sagittal diameters of each bone to body mass was calculated. For each bone the ratio of sagittal/transverse diameter was calculated, as an expression of the cross-sectional shape of the bones. The distributions of the ratios were not significantly different from normality in all the avian bones and in the mammalian femur and tibia. In most cases, the mean of the distribution was significantly different from 1 (circular shape). The analysis shows that changes in the ratio can be caused by selective factors, considering the correlation predicted between the breaking moments and the radii, but at the same time the cross-sectional shape of mammalian and avian long bones may have a phylogenetic basis. Finally, the previous assumption of relationship between bone curvature and stress predictability, is also discussed.</div></front></TEI><affiliations><list><country><li>Espagne</li></country><region><li>Catalogne</li></region></list><tree><country name="Espagne"><region name="Catalogne"><name sortKey="Cubo, Jorge" sort="Cubo, Jorge" uniqKey="Cubo J" first="Jorge" last="Cubo">Jorge Cubo</name></region><name sortKey="Casinos, Adria" sort="Casinos, Adria" uniqKey="Casinos A" first="Adrià" last="Casinos">Adrià Casinos</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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