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Text
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URL Address
<a href="http://doi.org/10.1098/rspb.2008.0912" target="_blank" rel="noreferrer noopener">http://doi.org/10.1098/rspb.2008.0912</a>
Pages
2609–2615
Issue
1651
Volume
275
Dublin Core
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Title
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Relative growth rates of predator and prey dinosaurs reflect effects of predation.
Publisher
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Proceedings. Biological sciences
Date
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2008
2008-11
Subject
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Aging/physiology; Animals; Dinosaurs/*growth & development; Fossils; Predatory Behavior/*physiology; Sexual Maturation; Species Specificity
Creator
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Cooper Lisa Noelle; Lee Andrew H; Taper Mark L; Horner John R
Description
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Hadrosaurs grew rapidly, and quantifying their growth is key to understanding life-history interactions between predators and prey during the Late Cretaceous. In this study, we longitudinally sampled a sequence of lines of arrested growth (LAGs) from an essentially full-grown hadrosaur Hypacrosaurus stebingeri (MOR 549). Spatial locations of LAGs in the femoral and tibial transverse sections of MOR 549 were measured and circumferences were calculated. For each bone, a time series of circumference data was fitted to several stochastic, discrete growth models. Our results suggest that the femur and the tibia of this specimen of Hypacrosaurus probably followed a Gompertz curve and that LAGs reportedly missing from early ontogeny were obscured by perimedullary resorption. In this specimen, death occurred at 13 years and took approximately 10-12 years to reach 95 per cent asymptotic size. The age at growth inflection, which is a proxy for reproductive maturity, occurred at approximately 2-3 years. Comparisons with several small and large predatory theropods reveal that MOR 549 grew faster and matured sooner than they did. These results suggest that Hypacrosaurus was able to partly avoid predators by outgrowing them.
Identifier
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<a href="http://doi.org/10.1098/rspb.2008.0912" target="_blank" rel="noreferrer noopener">10.1098/rspb.2008.0912</a>
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Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
2008
Aging/physiology
Animals
Cooper Lisa Noelle
Department of Anatomy & Neurobiology
Dinosaurs/*growth & development
Fossils
Horner John R
Lee Andrew H
NEOMED College of Medicine
Predatory Behavior/*physiology
Proceedings. Biological sciences
Sexual Maturation
Species Specificity
Taper Mark L