Blood flow to long bones indicates activity metabolism in mammals, reptiles and dinosaurs

Seymour, Roger S., Smith, Sarah L., White, Craig R., Henderson, Donald M. and Schwarz-Wings, Daniela (2012) Blood flow to long bones indicates activity metabolism in mammals, reptiles and dinosaurs. Proceedings of the Royal Society B-Biological Sciences, 279 1728: 451-456. doi:10.1098/rspb.2011.0968

Author Seymour, Roger S.
Smith, Sarah L.
White, Craig R.
Henderson, Donald M.
Schwarz-Wings, Daniela
Title Blood flow to long bones indicates activity metabolism in mammals, reptiles and dinosaurs
Journal name Proceedings of the Royal Society B-Biological Sciences   Check publisher's open access policy
ISSN 0962-8452
Publication date 2012-02
Year available 2011
Sub-type Article (original research)
DOI 10.1098/rspb.2011.0968
Volume 279
Issue 1728
Start page 451
End page 456
Total pages 6
Place of publication London, United Kingdom
Publisher The Royal Society Publishing
Collection year 2012
Language eng
Abstract The cross-sectional area of a nutrient foramen of a long bone is related to blood flow requirements of the internal bone cells that are essential for dynamic bone remodelling. Foramen area increases with body size in parallel among living mammals and non-varanid reptiles, but is significantly larger in mammals. An index of blood flow rate through the foramina is about 10 times higher in mammals than in reptiles, and even higher if differences in blood pressure are considered. The scaling of foramen size correlates well with maximum whole-body metabolic rate during exercise in mammals and reptiles, but less well with resting metabolic rate. This relates to the role of blood flow associated with bone remodelling during and following activity. Mammals and varanid lizards have much higher aerobic metabolic rates and exercise- induced bone remodelling than non-varanid reptiles. Foramen areas of 10 species of dinosaur from five taxonomic groups are generally larger than from mammals, indicating a routinely highly active and aerobic lifestyle. The simple measurement holds possibilities offers the possibility of assessing other groups of extinct and living vertebrates in relation to body size, behaviour and habitat.
Keyword Allometry
Blood flow
Bone remodelling
Metabolic rate
Nutrient foramen
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published online before print 6 July 2011

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
School of Biological Sciences Publications
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