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Science 14 July 2006:
Vol. 313. no. 5784, p. 144
DOI: 10.1126/science.313.5784.144b
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Little has been known about the overall life histories of groups of dinosaurs, especially the fraction that survived into adulthood and old age. Using deposits near Alberta, Canada, that preserve remains of tyrannosaurs that died over a short period of time, and by making comparisons with other tyrannosaurs, Erickson et al. (p. 213; see the news story by Stokstad) constructed a survivorship life table. The results imply that juvenile survivorship was high but that only a small fraction reached extreme size and an old age of between 20 and 30 years.




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