دورية أكاديمية
Morphological diversification of biomechanical traits: mustelid locomotor specializations and the macroevolution of long bone cross-sectional morphology
| العنوان: | Morphological diversification of biomechanical traits: mustelid locomotor specializations and the macroevolution of long bone cross-sectional morphology |
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| المؤلفون: | Kilbourne, Brandon, Hutchinson, John |
| المصدر: | BMC evolutionary biology, 19:37 |
| سنة النشر: | 2019 |
| المجموعة: | Publisso (ZB MED-Publikationsportal Lebenswissenschaften) |
| مصطلحات موضوعية: | Cross-sectional properties, Adaptation, Locomotion, Trait evolution, Morphological diversification, Mustelidae |
| الوصف: | BACKGROUND: Morphological diversity of limb bone lengths, diameters, and proportions in mammals is known to vary strongly with locomotor habit. It remains less well known how different locomotor habits are correlated with cross-sectional traits of the limb skeleton, such as cross-sectional area (CSA), second moments of area (SMA), and section modulus (MOD) and whether these traits have evolved adaptively. CSA and SMA represent the bone’s resistance to axial compression and bending, respectively, whereas MOD represents bone structural strength related to shape. Sampling 28 species of mustelids, a carnivoran lineage with diverse locomotor habits, we tested for differences in humeral, radial, and ulnar cross-sectional traits among specialists for climbing, digging, and swimming, in addition to generalists. Given that the limbs of digging specialists function in the dense substance of soil, and that swimming specialists need to counteract buoyancy, we predicted that these mustelids with these specializations should have the greatest values of cross-sectional traits. RESULTS: We analyzed cross-sectional traits (calculated via μCT scanning and rendered dimensionless) in 5% increments along a bone’s length and found significant differences among locomotor habits, though differences in ulnar cross-sectional traits were fewer than those for the humerus and radius. Swimming specialists had the greatest values of cross-sectional traits, followed by digging specialists. Climbing specialists had the lowest values of cross-sectional traits. However, phylogenetic affinity underlies these results. Fitting models of trait evolution to CSA and SMA revealed that a multi-rate Brownian motion model and a multi-optima Ornstein-Uhlenbeck model are the best-fitting models of evolution for these traits. However, inspection of α-values uncovered that many of the OU models did not differ from a Brownian motion model. CONCLUSIONS: Within Mustelidae, differences in limb function and locomotor habit influence cross-sectional traits in ways ... |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| العلاقة: | https://repository.publisso.de/resource/frl:6423157Test; https://doi.org/10.1186/s12862-019-1349-8Test; https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6354431Test/; https://bmcevolbiol.biomedcentral.com/articles/10.1186/s12862-019-1349-8#Sec13Test |
| DOI: | 10.1186/s12862-019-1349-8 |
| DOI: | 10.1186/s12862-019-1349-8#Sec13 |
| الإتاحة: | https://doi.org/10.1186/s12862-019-1349-8Test https://repository.publisso.de/resource/frl:6423157Test https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6354431Test/ |
| حقوق: | https://creativecommons.org/licenses/by/4.0Test/ |
| رقم الانضمام: | edsbas.316512BE |
| قاعدة البيانات: | BASE |
| DOI: | 10.1186/s12862-019-1349-8 |
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