Growth Dynamics of Australia's Polar Dinosaurs
Author Information
Author(s): Woodward Holly N., Rich Thomas H., Chinsamy Anusuya, Vickers-Rich Patricia
Primary Institution: Museum Victoria, Melbourne, Victoria, Australia
Hypothesis
The study tests the hypothesis that there is microstructural evidence suggesting at least some polar dinosaurs hibernated.
Conclusion
The results suggest that high-latitude dinosaurs had growth trajectories similar to their lower-latitude relatives, indicating they could successfully exploit polar regions.
Supporting Evidence
- The smallest hypsilophodontid specimens showed rapid growth rates during early ontogeny.
- Later ontogeny was marked by reduced growth rates as the dinosaurs approached skeletal maturity.
- Bone microstructure similarities suggest that polar theropods did not hibernate seasonally.
Takeaway
This study looked at how polar dinosaurs grew and found that they grew quickly when they were young, just like dinosaurs from warmer places.
Methodology
The study involved histological analysis of nine femora and eight tibiae from hypsilophodontid dinosaurs and one theropod femur.
Limitations
The study is limited by the fragmentary nature of the fossil specimens and the inability to identify some specimens beyond their general group.
Digital Object Identifier (DOI)
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