Gigantism and comparative life-history parameters of tyrannosaurid dinosaurs

@article{Erickson2004GigantismAC,
  title={Gigantism and comparative life-history parameters of tyrannosaurid dinosaurs},
  author={G. Erickson and P. Makovicky and P. Currie and M. Norell and S. Yerby and C. Brochu},
  journal={Nature},
  year={2004},
  volume={430},
  pages={772-775}
}
How evolutionary changes in body size are brought about by variance in developmental timing and/or growth rates (also known as heterochrony) is a topic of considerable interest in evolutionary biology. [...] Key Result T. rex had a maximal growth rate of 2.1 kg d-1, reached skeletal maturity in two decades and lived for up to 28 years. T. rex's great stature was primarily attained by accelerating growth rates beyond that of its closest relatives.Expand
Sexual maturity in growing dinosaurs does not fit reptilian growth models
TLDR
It is shown by counting lines of arrested growth and performing growth curve reconstructions that Tenontosaurus, Allosaurus, and Tyrannosaurus were reproductively mature by 8, 10, and 18 years, respectively, which suggests that these dinosaurs were born relatively precocial and experienced high adult mortality. Expand
Osteohistological analyses reveal diverse strategies of theropod dinosaur body-size evolution
TLDR
The first evidence of a lack of strong mechanistic or physiological constraints on size evolution in the largest bipeds in the fossil record is provided and evidence of one of the longest-living individual dinosaurs ever documented is provided. Expand
Dinosaur paleohistology: review, trends and new avenues of investigation
TLDR
It is suggested that the combination of histological and molecular methods holds great potential for examining the preserved tissues of dinosaurs, basal birds, and their extant relatives, and the development of novel techniques with which to further investigate important paleontological questions are discussed. Expand
Developmental patterns and variation among early theropods
TLDR
This work used ontogenetic sequence analysis (OSA) to reconstruct developmental sequences of morphological changes in the postcranial ontogeny of the early theropods Coelophysis bauri and Megapnosaurus rhodesiensis, both of which are known from large sample sizes. Expand
Assessing dinosaur growth patterns: a microscopic revolution.
  • G. Erickson
  • Biology, Medicine
  • Trends in ecology & evolution
  • 2005
TLDR
Paleohistological research is proving to be the most promising avenue towards gaining a comprehensive understanding of dinosaur biology. Expand
Longevity and growth rate estimates for a polar dinosaur: a Pachyrhinosaurus (Dinosauria: Neoceratopsia) specimen from the North Slope of Alaska showing a complete developmental record
Our knowledge of growth dynamics in large ceratopsian dinosaurs is very poor, in part, due to the paucity of quantifiable age markers such as growth lines in their bones. We sought marker-based,Expand
Relative growth rates of predator and prey dinosaurs reflect effects of predation
TLDR
Comparisons with several small and large predatory theropods reveal that MOR 549 grew faster and matured sooner than they did, suggesting that Hypacrosaurus was able to partly avoid predators by outgrowing them. Expand
Growing up Tyrannosaurus rex: Osteohistology refutes the pygmy “Nanotyrannus” and supports ontogenetic niche partitioning in juvenile Tyrannosaurus
TLDR
Together, the results support the synonomization of “Nanotyrannus” into Tyrannosaurus and fail to support the hypothesized presence of a sympatric tyrannosaurid species of markedly smaller adult body size, but suggest that this species singularly exploited mid- to large-sized theropod niches at the end of the Cretaceous. Expand
The evolution of intraspecific variation, growth, and body size in early theropod dinosaurs
TLDR
The authors' analyses suggest intraspecific variation in growth is high in early dinosaurs but largely absent in birds, and non-metric multidimensional scaling analysis suggests this variation is not related to sexual differences. Expand
Rise of dinosaurs reveals major body-size transitions are driven by passive processes of trait evolution
TLDR
A new body-size dataset of more than 400 therapsid and archosauromorph species spanning the Late Permian–Middle Jurassic is analysed, indicating intrinsic, biological factors are more important than the external environment and maximum size of Middle–early Late Triassic archosuromorph predators exceeds that of contemporary herbivores. Expand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 50 REFERENCES
Dinosaurian growth patterns and rapid avian growth rates
TLDR
It is shown that dinosaurs exhibited sigmoidal growth curves similar to those of other vertebrates, but had unique growth rates with respect to body mass. Expand
On the Evolution and Adaptive Significance of Postnatal Growth Rates in the Terrestrial Vertebrates
  • T. Case
  • Medicine, Biology
  • The Quarterly Review of Biology
  • 1978
TLDR
The results of this analysis support the notion that growth rate is adapted to certain features of an animal's environment, which will be altered in an empirically appropriate direction with changes in these environmental parameters. Expand
Craniofacial ontogeny in Tyrannosauridae (Dinosauria, Coelurosauria)
TLDR
An increase in tooth width, accompanied by loss of tooth positions, and a global shift from an immature gracile to a mature robust morphotype in the craniofacial skeleton typifies the ontogenetic changes in T. rex. Expand
Skull structure and evolution in tyrannosaurid dinosaurs
TLDR
The analysis of cranial characters and comparison of postcranial features reveal that Tarbosaurus bataar is not the sister taxon of Tyrannosaurus rex, and should be considered a genus distinct from Tyrannosaurus. Expand
A new giant carnivorous dinosaur from the Cretaceous of Patagonia
TLDR
A new giant carnivorous dinosaur from the Upper Creta-ceous of northwestern Patagonia (Argentina) is reported, characterized by a proportionally low skull, a reduced shoulder girdle, and robust vertebrae and hind limbs, and provides an opportunity to exam-ine the Gondwanan dinosaur palaeocommunities and their relation to those from Laurasia. Expand
Cranial anatomy of tyrannosaurid dinosaurs from the Late Cretaceous of Alberta, Canada
TLDR
It is concluded that the most parsimonious interpretation of relationships leads to the separation of the two species of Albertosaurus into Gorgosaurus libratus from the Campanian Dinosaur Park Formation and Albertosaurus sarcophagus from the upper Campanian/lower Maastrichtian Horseshoe Canyon Formation. Expand
POSSIBLE EVIDENCE OF GREGARIOUS BEHAVIOR IN TYRANNOSAURIDS
In 1910, a collecting party from the American Museum of Natural History led by Barnum Brown floated down the Red Deer Riverof Alberta. In the Horseshoe Canyon Forma­ tion (Edmonton Group,Expand
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. Expand
Pelvic and hindlimb musculature of Tyrannosaurus rex (Dinosauria: Theropoda)
TLDR
A new reconstruction of the pelvic and hindlimb muscles of the large theropod dinosaur Tyrannosaurus rex is developed, using data from both extant and fossil turtles, lepidosaurs, and archosaurs to constrain inferences concerning the soft‐tissue structures in T. rex. Expand
Physiological implications of the bone histology of Syntarsus rhodesiensis (Saurischia: Theropoda)
TLDR
The general bone histology is described initially and thereafter follow speculations on the animal's thermoregulatory ability, possible evidence for sexual dimorphism, and also the probable growth strategy it employed, as reflected in its bone Histology. Expand
...
1
2
3
4
5
...