Dinosaur Metabolism and the Allometry of Maximum Growth Rate

The allometry of maximum somatic growth rate has been used in prior studies to classify the metabolic state of both extant vertebrates and dinosaurs. The most recent such studies are reviewed, and their data is reanalyzed. The results of allometric regressions on growth rate are shown to depend on t...

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Bibliographic Details
Published in:PloS one 2016-11, Vol.11 (11), p.e0163205-e0163205
Main Author: Myhrvold, Nathan P
Format: Article
Language:English
Subjects:
Age
Allometry
Animal behavior
Animals
Biology and Life Sciences
Body Size
Computer and Information Sciences
Curvature
Dinosaurs
Dinosaurs - classification
Dinosaurs - growth & development
Dinosaurs - metabolism
Earth Sciences
Endothermic reactions
Energy Metabolism
Evolution
Fossils
Genetic transformation
Growth rate
Histology
Hypotheses
Independent variables
Medicine and Health Sciences
Metabolic rate
Metabolism
Regression Analysis
Reptiles
Research and Analysis Methods
Scaling
Studies
Taxonomy
Transformation
Vertebrates
Zebrafish
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Summary:The allometry of maximum somatic growth rate has been used in prior studies to classify the metabolic state of both extant vertebrates and dinosaurs. The most recent such studies are reviewed, and their data is reanalyzed. The results of allometric regressions on growth rate are shown to depend on the choice of independent variable; the typical choice used in prior studies introduces a geometric shear transformation that exaggerates the statistical power of the regressions. The maximum growth rates of extant groups are found to have a great deal of overlap, including between groups with endothermic and ectothermic metabolism. Dinosaur growth rates show similar overlap, matching the rates found for mammals, reptiles and fish. The allometric scaling of growth rate with mass is found to have curvature (on a log-log scale) for many groups, contradicting the prevailing view that growth rate allometry follows a simple power law. Reanalysis shows that no correlation between growth rate and basal metabolic rate (BMR) has been demonstrated. These findings drive a conclusion that growth rate allometry studies to date cannot be used to determine dinosaur metabolism as has been previously argued.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0163205