Osteomorphological features of the hind limb bones of Saiga antelope ( Saiga tatarica )

2020 ◽  
Author(s):  
Libaihe Jing ◽  
Peng He ◽  
Dongfang Ding ◽  
Can Qu ◽  
Baoping Shao ◽  
...  
Keyword(s):  
Hind Limb ◽  
Limb Bones ◽  
Saiga Antelope ◽  
Saiga Tatarica

scholarly journals Functional Morphology and Morphological Diversification of Hind Limb Cross-Sectional Traits in Mustelid Mammals

2020 ◽  
Vol 2 (1) ◽  
Author(s):  
P Parsi-Pour ◽  
B M Kilbourne
Keyword(s):  
Hind Limb ◽  
Structural Strength ◽  
Aquatic Environments ◽  
Sectional Area ◽  
Cross Sectional ◽  
Phylogenetic Relatedness ◽  
Limb Bone ◽  
Limb Bones ◽  
Section Modulus ◽  
Second Moments

Synopsis Locomotor habits in mammals are strongly tied to limb bones’ lengths, diameters, and proportions. By comparison, fewer studies have examined how limb bone cross-sectional traits relate to locomotor habit. Here, we tested whether climbing, digging, and swimming locomotor habits reflect biomechanically meaningful differences in three cross-sectional traits rendered dimensionless— cross-sectional area (CSA), second moments of area (SMA), and section modulus (MOD)—using femora, tibiae, and fibulae of 28 species of mustelid. CSA and SMA represent resistance to axial compression and bending, respectively, whereas MOD represents structural strength. Given the need to counteract buoyancy in aquatic environments and soil’s high density, we predicted that natatorial and fossorial mustelids have higher values of cross-sectional traits. For all three traits, we found that natatorial mustelids have the highest values, followed by fossorial mustelids, with both of these groups significantly differing from scansorial mustelids. However, phylogenetic relatedness strongly influences diversity in cross-sectional morphology, as locomotor habit strongly correlates with phylogeny. Testing whether hind limb bone cross-sectional traits have evolved adaptively, we fit Ornstein–Uhlenbeck (OU) and Brownian motion (BM) models of trait diversification to cross-sectional traits. The cross-sectional traits of the femur, tibia, and fibula appear to have, respectively, diversified under a multi-rate BM model, a single rate BM model, and a multi-optima OU model. In light of recent studies on mustelid body size and elongation, our findings suggest that the mustelid body plan—and perhaps that of other mammals—is likely the sum of a suite of traits evolving under different models of trait diversification.

Saiga Antelope — Saiga tatarica

2003 ◽  
pp. 171-186 ◽  
Author(s):  
Leonid Baskin ◽  
Kjell Danell
Keyword(s):  
Saiga Antelope ◽  
Saiga Tatarica

Dispersal events of the saiga antelope (Saiga tatarica) in Central Europe in response to the climatic fluctuations in MIS 2 and the early part of MIS 1

2016 ◽  
Vol 420 ◽  
pp. 357-362 ◽  
Author(s):  
Adam Nadachowski ◽  
Grzegorz Lipecki ◽  
Urszula Ratajczak ◽  
Krzysztof Stefaniak ◽  
Piotr Wojtal
Keyword(s):  
Central Europe ◽  
Climatic Fluctuations ◽  
Saiga Antelope ◽  
Saiga Tatarica ◽  
Dispersal Events

scholarly journals Ontogenetic and inter-elemental osteohistological variability in the leopard tortoise Stigmochelys pardalis

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e8030 ◽  
Author(s):  
Alexander Edward Botha ◽  
Jennifer Botha
Keyword(s):  
Bone Resorption ◽  
Hind Limb ◽  
Life History Traits ◽  
Histological Analysis ◽  
Fundamental System ◽  
Adult Stage ◽  
Aquatic Species ◽  
Terrestrial Species ◽  
Limb Bones ◽  
Hind Limbs

Testudines are a group of reptiles characterized by the presence of a shell covered by keratinous shields. Stigmochelys pardalis is the most widely distributed terrestrial testudine in southern Africa. Although relatively common with some life history traits being well known, the growth of this species has yet to be studied in any detail. The bone microanatomy of this clade differs from that found in other amniotes, where terrestrial species tend to display characteristics normally seen in aquatic species and vice versa. A detailed histological analysis of the limb bones of S. pardalis reveals extensive variation through ontogeny. Cortical bone becomes increasingly thicker through ontogeny and is finally resorbed in the late sub-adult stage, resulting in a thin cortex and a large infilled medullary cavity. The predominant bone tissues are parallel-fibred and lamellar-zonal for the forelimbs and hind limbs respectively. The oldest individual displayed an External Fundamental System indicating that the growth rate had decreased substantially by this stage. Variability is prevalent between the forelimb and hind limb as well as between early and late sub-adults Forelimb elements exhibit characteristics such as faster growing parallel-fibered bone tissue, slightly higher vascularization and a predominance of annuli over Lines of Arrested Growth (LAG) compared to the hind limb which exhibits poorly vascularized, slower growing lamellar-zonal bone interrupted by LAGs. These differences indicate that the forelimb grew more rapidly than the hind limb, possibly due to the method of locomotion seen in terrestrial species. The extensive bone resorption that occurs from the early sub-adult stage destroys much of the primary cortex and results in a significantly different ratio of inner and outer bone diameter (p = 3.59 × 10­−5; df = 28.04) as well as compactness (p = 2.91 × 10­−5; df = 31.27) between early and late sub-adults. The extensive bone resorption seen also destroys the ecological signal and infers an aquatic lifestyle for this species despite it being clearly terrestrial. This supports the results of other studies that have found that using bone microanatomy to determine lifestyle in testudines does not produce accurate results.

Development of hind limb bones in chicken embryos under altered temperature and humidity conditions

2008 ◽  
Vol 39 (3) ◽  
pp. 185-187 ◽  
Author(s):  
T. M. Polovintseva ◽  
F. I. Suleimanov
Keyword(s):  
Hind Limb ◽  
Chicken Embryos ◽  
Limb Bones ◽  
Temperature And Humidity

Effects of Sciatic Denervation on Growth of Hind Limb Bones in Hymenochirus boettgeri

2007 ◽  
Vol 20 (4) ◽  
pp. 343 ◽  
Author(s):  
Jang Shin Sohn ◽  
Hyoung Tae Kim
Keyword(s):  
Hind Limb ◽  
Limb Bones ◽  
Hymenochirus Boettgeri
Sign in / Sign up

Export Citation Format

Share Document