PDF(Pubmed)
Abstract：
UNASSIGNED: Captivity alters the locomotor behavior of wild artiodactyls and affects the mechanical loading of the calcaneus; however, the resulting adaptive changes in calcaneus morphology have not been sufficiently studied to date. This study aimed to investigate the morphological and mechanical adaptive variations in the calcaneus of Saiga tatarica to understand further the functional adaptation of the calcaneus in wild artiodactyl to captivity.
UNASSIGNED: Paired calcanei from autopsy samples of six captive wild artiodactyls (S. tatarica) and six domesticated artiodactyls (Ovis aries) were divided into skeletally immature and mature groups using X-ray evaluation of growth plate closure. High-resolution microcomputed tomography revealed a calcaneal diaphyseal cross-section. The mechanical and nanomorphological characteristics of the trabecular bone were determined by atomic force microscopy.
UNASSIGNED: The percent cortical bone area (%CA), cortical thickness ratio (CTR), and Young\'s modulus (E) differed between species in the immature groups but not in the mature groups. S. tatarica had significantly higher growth rates for %CA, CTR, and E in the mid-shaft than O. aries (p < 0.05).
UNASSIGNED: The calcaneus morphology of S. tatarica converges with that of domesticated O. aries during ontogeny. These results indicate that the calcaneus of wild artiodactyls can undergo potentially transitional changes during the short-term adaptation to captivity. The above parameters can be preliminarily identified as morphological signs of functional bone adaptation in artiodactyls.
UNASSIGNED: Paired calcanei from autopsy samples of six captive wild artiodactyls (S. tatarica) and six domesticated artiodactyls (Ovis aries) were divided into skeletally immature and mature groups using X-ray evaluation of growth plate closure. High-resolution microcomputed tomography revealed a calcaneal diaphyseal cross-section. The mechanical and nanomorphological characteristics of the trabecular bone were determined by atomic force microscopy.
UNASSIGNED: The percent cortical bone area (%CA), cortical thickness ratio (CTR), and Young\'s modulus (E) differed between species in the immature groups but not in the mature groups. S. tatarica had significantly higher growth rates for %CA, CTR, and E in the mid-shaft than O. aries (p < 0.05).
UNASSIGNED: The calcaneus morphology of S. tatarica converges with that of domesticated O. aries during ontogeny. These results indicate that the calcaneus of wild artiodactyls can undergo potentially transitional changes during the short-term adaptation to captivity. The above parameters can be preliminarily identified as morphological signs of functional bone adaptation in artiodactyls.
摘要：
■圈养会改变野生偶蹄动物的运动行为，并影响跟骨的机械载荷；但是，迄今为止，尚未对跟骨形态的适应性变化进行充分研究。这项研究旨在研究Saigatatarica跟骨的形态和机械适应性变化，以进一步了解野生偶发动物跟骨对圈养的功能适应性。
■来自6个圈养野生偶蹄动物的尸检样本的成对calcanei（S.tatarica）和六个驯化的偶蹄动物（Ovisaries）使用X射线评估生长板闭合情况分为骨骼未成熟和成熟组。高分辨率显微计算机断层扫描显示跟骨骨干横截面。通过原子力显微镜确定了小梁骨的机械和纳米形态特征。
■皮质骨面积百分比（%CA），皮质厚度比（CTR），和杨氏模量（E）在未成熟群体中的物种之间存在差异，而在成熟群体中没有差异。S、tatarica的%CA增长率明显较高，CTR,和E在中轴比O.aries(p<0.05)。
■在个体发育过程中，塔塔里卡的跟骨形态与驯化的O.aries的跟骨形态趋同。这些结果表明，野生偶蹄动物的跟骨在短期适应圈养过程中可能会发生过渡性变化。上述参数可以初步确定为偶蹄动物功能性骨适应的形态学标志。
■来自6个圈养野生偶蹄动物的尸检样本的成对calcanei（S.tatarica）和六个驯化的偶蹄动物（Ovisaries）使用X射线评估生长板闭合情况分为骨骼未成熟和成熟组。高分辨率显微计算机断层扫描显示跟骨骨干横截面。通过原子力显微镜确定了小梁骨的机械和纳米形态特征。
■皮质骨面积百分比（%CA），皮质厚度比（CTR），和杨氏模量（E）在未成熟群体中的物种之间存在差异，而在成熟群体中没有差异。S、tatarica的%CA增长率明显较高，CTR,和E在中轴比O.aries(p<0.05)。
■在个体发育过程中，塔塔里卡的跟骨形态与驯化的O.aries的跟骨形态趋同。这些结果表明，野生偶蹄动物的跟骨在短期适应圈养过程中可能会发生过渡性变化。上述参数可以初步确定为偶蹄动物功能性骨适应的形态学标志。
