Mass allometry of the appendicular skeleton in terrestrial mammals
Identifieur interne : 000B55 ( Main/Exploration ); précédent : 000B54; suivant : 000B56Mass allometry of the appendicular skeleton in terrestrial mammals
Auteurs : Per Christiansen [Danemark]Source :
- Journal of Morphology [ 0362-2525 ] ; 2002-02.
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Abstract
Most analyses on allometry of long bones in terrestrial mammals have focused on dimensional allometry, relating external bone measurements either to each other or to body mass. In this article, an analysis of long bone mass to body mass in 64 different species of mammals, spanning three orders of magnitude in body mass, is presented. As previously reported from analyses on total skeletal mass to body mass in terrestrial vertebrates, the masses of most appendicular bones scale with significant positive allometry. These include the pectoral and pelvic girdles, humerus, radius+ulna, and forelimb. Total hindlimb mass and the masses of individual hindlimb bones (femur, tibia, and metatarsus) scale isometrically. Metapodial mass correlates more poorly with body mass than the girdles or any of the long bones. Metapodial mass probably reflects locomotor behavior to a greater extent than do the long bones. Long bone mass in small mammals (<50 kg) scales with significantly greater positive allometry than bone mass in large (>50 kg) mammals, probably because of the proportionally shorter long bones of large mammals as a means of preserving resistance to bending forces at large body sizes. The positive allometric scaling of the skeleton in terrestrial animals has implications for the maximal size attainable, and it is possible that the largest sauropod dinosaurs approached this limit. J. Morphol. 251:195–209, 2002. © 2002 Wiley‐Liss, Inc.
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DOI: 10.1002/jmor.1083
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In this article, an analysis of long bone mass to body mass in 64 different species of mammals, spanning three orders of magnitude in body mass, is presented. As previously reported from analyses on total skeletal mass to body mass in terrestrial vertebrates, the masses of most appendicular bones scale with significant positive allometry. These include the pectoral and pelvic girdles, humerus, radius+ulna, and forelimb. Total hindlimb mass and the masses of individual hindlimb bones (femur, tibia, and metatarsus) scale isometrically. Metapodial mass correlates more poorly with body mass than the girdles or any of the long bones. Metapodial mass probably reflects locomotor behavior to a greater extent than do the long bones. Long bone mass in small mammals (<50 kg) scales with significantly greater positive allometry than bone mass in large (>50 kg) mammals, probably because of the proportionally shorter long bones of large mammals as a means of preserving resistance to bending forces at large body sizes. The positive allometric scaling of the skeleton in terrestrial animals has implications for the maximal size attainable, and it is possible that the largest sauropod dinosaurs approached this limit. J. Morphol. 251:195–209, 2002. © 2002 Wiley‐Liss, Inc.</div></front></TEI><affiliations><list><country><li>Danemark</li></country></list><tree><country name="Danemark"><noRegion><name sortKey="Christiansen, Per" sort="Christiansen, Per" uniqKey="Christiansen P" first="Per" last="Christiansen">Per Christiansen</name></noRegion><name sortKey="Christiansen, Per" sort="Christiansen, Per" uniqKey="Christiansen P" first="Per" last="Christiansen">Per Christiansen</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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