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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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Published in: | PloS one 2016-11, Vol.11 (11), p.e0163205-e0163205 |
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description | 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. |
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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.</description><identifier>ISSN: 1932-6203</identifier><identifier>EISSN: 1932-6203</identifier><identifier>DOI: 10.1371/journal.pone.0163205</identifier><identifier>PMID: 27828977</identifier><language>eng</language><publisher>United States: Public Library of Science</publisher><subject>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</subject><ispartof>PloS one, 2016-11, Vol.11 (11), p.e0163205-e0163205</ispartof><rights>COPYRIGHT 2016 Public Library of Science</rights><rights>2016 Nathan P. Myhrvold. This is an open access article distributed under the terms of the Creative Commons Attribution License: http://creativecommons.org/licenses/by/4.0/ (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><rights>2016 Nathan P. Myhrvold 2016 Nathan P. 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Academic</collection><collection>PubMed Central (Full Participant titles)</collection><collection>DOAJ Directory of Open Access Journals</collection><jtitle>PloS one</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Myhrvold, Nathan P</au><au>Fiorillo, Anthony</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Dinosaur Metabolism and the Allometry of Maximum Growth Rate</atitle><jtitle>PloS one</jtitle><addtitle>PLoS One</addtitle><date>2016-11-09</date><risdate>2016</risdate><volume>11</volume><issue>11</issue><spage>e0163205</spage><epage>e0163205</epage><pages>e0163205-e0163205</pages><issn>1932-6203</issn><eissn>1932-6203</eissn><abstract>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. 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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 |
title | Dinosaur Metabolism and the Allometry of Maximum Growth Rate |
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