Juvenile Lesser Prairie-Chicken Growth and Development in Southeastern New Mexico

Bell, Luke A.; Pitman, James C.; Patten, Michael A.; Wolfe, Donald H.; Sherrod, Steve K.; Fuhlendorf, Samuel D.

doi:10.1676/05-125.1

The Wilson Journal of Ornithology

2007

DOI: 10.1676/05-125.1

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Juvenile Lesser Prairie-Chicken Growth and Development in Southeastern New Mexico

Luke A. Bell¹,

James C. Pitman²,

Michael A. Patten³

et al.

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Cited by 4 publications

References 15 publications

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Metabolism of dinosaurs as determined from their growth

Lee

2015

Phys. Rev. E

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A model based on cellular properties is used to analyze the mass growth curves of 20 dinosaurs. This analysis yields the first measurement of the average cellular metabolism of dinosaurs. The organismal metabolism is also determined. The cellular metabolism of dinosaurs is found to decrease with mass at a slower rate than is observed in extant animals. The organismal metabolism increases with the mass of the dinosaur. These results come from both the Saurischia and Ornithischia branches of Dinosauria, suggesting that the observed metabolic features were common to all dinosaurs. The results from dinosaurs are compared to data from extant placental and marsupial mammals, a monotreme, and altricial and precocial birds, reptiles, and fish. Dinosaurs had cellular and organismal metabolisms in the range observed in extant mesotherms.

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Metabolism of dinosaurs as determined from their growth

Lee

2015

Phys. Rev. E

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Embryonic metabolism of the ornithischian dinosaursProtoceratops andrewsiandHypacrosaurus stebingeriand implications for calculations of dinosaur egg incubation times

Lee

2017

Phys. Rev. E

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The embryonic metabolisms of the ornithischian dinosaurs Protoceratops andrewsi and Hypacrosaurus stebingeri have been determined and are in the range observed in extant reptiles. The average value of the measured embryonic metabolic rates for P. andrewsi and H. stebingeri are then used to calculate the incubation times for 21 dinosaurs from both Sauischia and Ornithischia using a mass growth model based on conservation of energy. The calculated incubation times vary from about 70 days for Archaeopteryx lithographica to about 180 days for Alamosaurus sanjuanensis. Such long incubation times seem unlikely, particularly for the sauropods and large theropods. Incubation times are also predicted with the assumption that the saurischian dinosaurs had embryonic metabolisms in the range observed in extant birds.

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Evidence for mesothermy in dinosaurs

Grady

Enquist

Dettweiler‐Robinson

et al. 2014

Science

149

207

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Were dinosaurs ectotherms or fast-metabolizing endotherms whose activities were unconstrained by temperature? To date, some of the strongest evidence for endothermy comes from the rapid growth rates derived from the analysis of fossil bones. However, these studies are constrained by a lack of comparative data and an appropriate energetic framework. Here we compile data on ontogenetic growth for extant and fossil vertebrates, including all major dinosaur clades. Using a metabolic scaling approach, we find that growth and metabolic rates follow theoretical predictions across clades, although some groups deviate. Moreover, when the effects of size and temperature are considered, dinosaur metabolic rates were intermediate to those of endotherms and ectotherms and closest to those of extant mesotherms. Our results suggest that the modern dichotomy of endothermic versus ectothermic is overly simplistic.

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Juvenile Lesser Prairie-Chicken Growth and Development in Southeastern New Mexico

Cited by 4 publications

References 15 publications

Metabolism of dinosaurs as determined from their growth

Metabolism of dinosaurs as determined from their growth

Embryonic metabolism of the ornithischian dinosaursProtoceratops andrewsiandHypacrosaurus stebingeriand implications for calculations of dinosaur egg incubation times

Evidence for mesothermy in dinosaurs

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