Mass Prediction in Theropod Dinosaurs

@article{Christiansen2004MassPI,
  title={Mass Prediction in Theropod Dinosaurs},
  author={Per Christiansen and R.A. Fari{\~n}a †},
  journal={Historical Biology},
  year={2004},
  volume={16},
  pages={85 - 92}
}
Body size is a crucial life history parameter for an organism. Therefore, mass estimation for fossil species is important for many kinds of analyses. Several attempts have been made to yield equations applicable to dinosaurs. In this paper, we offer bi- and multivariate equations based on log transformed appendicular skeleton data from a sample of 16 theropods which were known from reasonably complete skeletal remains, and spanning a wide size range. Body masses of the included taxa had been… 
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142 Citations

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References

SHOWING 1-10 OF 58 REFERENCES

Body size in proboscideans, with notes on elephant metabolism

TLDR
Both the basal and the field metabolic rates of extant elephants are lower than predicted for a hypothetical mammal, in accordance with their body size and subsistence on low-quality foods.

A NEW METHOD TO CALCULATE ALLOMETRIC LENGTH-MASS RELATIONSHIPS OF DINOSAURS

TLDR
Body mass increased allometrically with total length in all groups of dinosaurs, but 95% confidence intervals were very large for Ankylosauria and Stegosauria so that the resulting regression equations have little predicting power.

Body weight prediction in early fossil hominids: towards a taxon-"independent" approach.

TLDR
The choice of a model taxon is crucial when investigating fossil hominids that clearly do not resemble any extant species or show significant differences from modern human proportions, as scaling with body weight is strongly divergent in African apes and humans for most skeletal predictors investigated here.

Comparison of body mass estimation techniques, using Recent reptiles and the pelycosaur Edaphosaurus boanerges

TLDR
Body mass of Edaphosaums boanerges (ROM 7985), a mounted skeleton with a fibreglass model built around the left side was estimated by various methods, including Graphic Double Integration on the fibReglass model divided into measurable components.

BODY MASS ESTIMATIONS IN LUJANIAN (LATE PLEISTOCENE-EARLY HOLOCENE OF SOUTH AMERICA) MAMMAL MEGAFAUNA

In this paper a data base is initiated, with the body mass estimations for a number of xenarthran and epitherian species of the Lujanian Land Mammal Age (late Pleis- tocene - early Holocene of South…

Body mass in large extant and extinct carnivores

TLDR
Two of the extinct carnivores (Smilodon fatalis and Panthera atrox) are estimated to be as much as one and a half times heavier than previously thought.

Implications of body-mass estimates for dinosaurs

ABSTRACT Body-mass estimates have been made for 220 of the over 300 generally accepted dinosaur genera. The 1–10 ton body-mass category is the modal one for all dinosaur genera, dinosaurs on nearly…

Differential scaling of the long bones in the terrestrial carnivora and other mammals

TLDR
The capacity to compensate for size increases through alteration of limb posture is limited in extremely large‐sized mammals, such that radical changes in bone shape are required to maintain similar levels of peak bone stress.

Body mass estimation in armoured mammals: cautions and encouragements for the use of parameters from the appendicular skeleton

TLDR
Predictive equations based on diaphyseal cross-sectional parameters provided the most accurate estimates of body mass in caviomorph rodents and dasypodids, but the confounding influence of locomotor posture, fossoriality, and arboreality render these relationships less predictable across all three groups considered here.

What size were Arctodus simus and Ursus spelaeus (Carnivora: Ursidae)?

TLDR
Body masses of the giant short-faced bear and the cave bear were calculated with equations based on a long-bone dimensions:body mass proportion ratio ratio in extant carnivores, finding that large Arctodus specimens considerably exceeded even the largest extant ursids in mass.
...