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- W2283981832 abstract "Tracks arise through a complex interplay between animal and substrate. Studying this dynamic process is challenging because most foot-sediment and sediment-sediment interactions are rapid and hidden from view. Herein, we describe a new method for visualizing and quantifying three-dimensional movements of both a morphologically accurate indenter and realistic sediment during track formation. Our method uses biplanar X-ray imaging and an animation-based workflow to reconstruct the trajectories of metal beads seeded throughout the sediment volume. X-rays allow sub-surface motion normally concealed by the foot and opaque matrix to be analyzed at 30 frames per second with sub-millimeter resolution. Results from two case studies of tridactyl tracks in semi-liquid mud provide novel, animated visualizations, examples of ensemble and particle-specific data, as well as measures of precision and accuracy. This methodology has the potential to mechanistically link specific track morphologies to foot movement, clarify undertrack formation, validate computational models, and set a new standard for evidence-based reconstruction of locomotion from fossil footprints. Richard G. Ellis. Department of Ecology and Evolutionary Biology, Brown University, Providence, Rhode Island, USA and Structure and Motion Lab, The Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, Hertfordshire, AL9 7TA United Kingdom richgellis@gmail.com Stephen M. Gatesy (correspondence author). Department of Ecology and Evolutionary Biology, Brown University, Providence, Rhode Island, USA stephen_gatesy@brown.edu" @default.
- W2283981832 created "2016-06-24" @default.
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- W2283981832 date "2013-01-01" @default.
- W2283981832 modified "2023-10-16" @default.
- W2283981832 title "A biplanar X-ray method for three-dimensional analysis of track formation" @default.
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- W2283981832 doi "https://doi.org/10.26879/324" @default.
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