Tyrannosaurus rex: Scavenger or Hunter?
Author Information
Author(s): Chris Carbone, Samuel T. Turvey, Jon Bielby
Primary Institution: Institute of Zoology, Zoological Society of London
Hypothesis
Could Tyrannosaurus rex have been an obligate scavenger rather than a predator?
Conclusion
The study suggests that T. rex was unlikely to have been a successful obligate scavenger due to competition with smaller theropods and the rarity of large carcasses.
Supporting Evidence
- Nearly 50% of herbivores in the T. rex community were predicted to be in the 55-85 kg size range.
- T. rex would have had to search for long periods to find large carcasses due to their rarity.
- Smaller theropods were predicted to have search rates 14-60 times higher than T. rex.
Takeaway
T. rex probably hunted for food instead of just scavenging because there were many smaller dinosaurs that would eat the carcasses first.
Methodology
The study analyzed the competition between T. rex and smaller theropods for carcasses in Late Cretaceous ecosystems.
Potential Biases
Potential biases in fossil record preservation may affect the understanding of species abundance and competition.
Limitations
The analysis is based on assumptions about the ecological dynamics of extinct species, which may not fully reflect their actual behaviors.
Digital Object Identifier (DOI)
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