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- W2968861641 abstract "In several groups of mammals, adaptation to differing functional demands is reflected in long bone cross-sectional properties (CSP), which relate to the resistance to compression and to bending loads in the craniocaudal and mediolateral directions. Members of the Sciuromorpha (squirrel-like rodents) display a diversity of locomotor ecologies and span three orders of magnitude in terms of body size. The availability of robust phylogenies is rendering them a suitable group to further substantiate the relationship of long bone CSP with locomotor ecology and body mass while taking the phylogenetic non-independence among species into account. Here, we studied 69 species of Sciuromorpha belonging to three lifestyle categories, arboreal, fossorial, and aerial (i.e., gliding). We hypothesized locomotor category specific loading regimes that act on femora during predominant or, in terms of gliding, critical locomotor behaviors of each category. High resolution computed tomography scans of the specimens' femora were obtained and cross-sections in 5% increments were analyzed. Cross-sectional area, the craniocaudal second moment of area (SMAcc ), and the mediolateral second moment of area were quantified. Further, a scaling analysis was conducted for each bone cross-section to examine how the CSP scale with body mass. Body mass accounted for variances in CSP with mainly positive allometry. The aerial sciuromorphs showed lower values of CSP compared to the arboreal and fossorial species in the distal epiphysis for all quantified parameters and along the bone for SMAcc . In contrast to previous studies on other mammalian lineages, no differences in CSP were found between the fossorial and the arboreal lifestyles." @default.
- W2968861641 created "2019-08-22" @default.
- W2968861641 creator A5042627222 @default.
- W2968861641 creator A5058910942 @default.
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- W2968861641 date "2019-06-06" @default.
- W2968861641 modified "2023-10-05" @default.
- W2968861641 title "The evolution of femoral cross‐sectional properties in sciuromorph rodents: Influence of body mass and locomotor ecology" @default.
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- W2968861641 doi "https://doi.org/10.1002/jmor.21007" @default.
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