scholarly journals Regulation of the limb shape during the development of the Chinese softshell turtles

2020 ◽  
Vol 22 (6) ◽  
pp. 451-462
Author(s):  
Ingrid R. Cordeiro ◽  
Reiko Yu ◽  
Mikiko Tanaka
Keyword(s):  
Softshell Turtles

Active Uptake of Sodium by Softshell Turtles (Trionyx spinifer)

Science ◽  
1965 ◽  
Vol 149 (3679) ◽  
pp. 67-69 ◽  
Author(s):  
W. A. Dunson ◽  
R. D. Weymouth
Keyword(s):  
Active Uptake ◽  
Softshell Turtles

scholarly journals Evolution of dosage compensation does not depend on genomic background

2020 ◽  
Author(s):  
Michail Rovatsos ◽  
Lukáš Kratochvíl
Keyword(s):  
Dosage Compensation ◽  
Sex Chromosomes ◽  
Sex Chromosome ◽  
Genomic Region ◽  
Gene Copy ◽  
Gene Dose ◽  
Copy Numbers ◽  
Compensation Mechanisms ◽  
Gene Copy Numbers ◽  
Softshell Turtles

AbstractOrganisms evolved various mechanisms to cope with the differences in the gene copy numbers between sexes caused by degeneration of Y and W sex chromosomes. Complete dosage compensation or at least expression balance between sexes was reported predominantly in XX/XY, but rarely in ZZ/ZW systems. However, this often-reported pattern is based on comparisons of lineages where sex chromosomes evolved from non-homologous genomic regions, potentially differing in sensitivity to differences in gene copy numbers. Here we document that two reptilian lineages (XX/XY iguanas and ZZ/ZW softshell turtles), which independently co-opted the same ancestral genomic region for the function of sex chromosomes, evolved different gene dose regulatory mechanisms. The independent co-option of the same genomic region for the role of sex chromosome as in the iguanas and the softshell turtles offers a great opportunity for testing evolutionary scenarios on the sex chromosome evolution under the explicit control for the genomic background and for gene identity. We showed that the parallel loss of functional genes from the Y chromosome of the green anole and the W chromosome of the Florida softshell turtle led to different dosage compensation mechanisms. Our approach controlling for genetic background thus does not support that the variability in the regulation of the gene dose differences is a consequence of ancestral autosomal gene content.

Millennium-old farm breeding of Chinese softshell turtles (Pelodiscus spp.) results in massive erosion of biodiversity

2018 ◽  
Vol 105 (5-6) ◽  
Author(s):  
Shiping Gong ◽  
Melita Vamberger ◽  
Markus Auer ◽  
Peter Praschag ◽  
Uwe Fritz
Keyword(s):  
Softshell Turtles

scholarly journals Stable Cretaceous sex chromosomes enable molecular sexing in softshell turtles (Testudines: Trionychidae)

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Michail Rovatsos ◽  
Peter Praschag ◽  
Uwe Fritz ◽  
Lukáš Kratochvšl
Keyword(s):  
Sex Chromosomes ◽  
Molecular Sexing ◽  
Softshell Turtles

scholarly journals Origins of softshell turtles in Hawaii with implications for conservation

2015 ◽  
Vol 17 (1) ◽  
pp. 207-220 ◽  
Author(s):  
Caroline M. Dong ◽  
Tag N. Engstrom ◽  
Robert C. Thomson
Keyword(s):  
Softshell Turtles

Genetic Variation and Gene Flow at the Range Edge of Two Softshell Turtles

2016 ◽  
Vol 50 (3) ◽  
pp. 357-365 ◽  
Author(s):  
Charles J Reinertsen ◽  
Sarah M. Mitchell ◽  
Ke Han Bao ◽  
Katherine M. Halvorson ◽  
Michael J. Pappas ◽  
...  
Keyword(s):  
Genetic Variation ◽  
Gene Flow ◽  
Range Edge ◽  
Softshell Turtles

scholarly journals Comparative Anatomy of Axial Skeleton of Red-eared Turtle (Trachemys scripta elegans, Wied 1838) and Softshell Turtle (Amyda cartilaginea, Boddaert 1770)

2019 ◽  
Vol 2 ◽  
pp. 97-100
Author(s):  
Hanif Mustafa ◽  
Muhammad Ja’far Luthfi ◽  
Fadhilatul Ilmi ◽  
Ida Khoirunnisa ◽  
Takrima Takrima
Keyword(s):  
Comparative Anatomy ◽  
Cervical Vertebrae ◽  
Axial Skeleton ◽  
Trachemys Scripta ◽  
Blue Staining ◽  
Alcian Blue Staining ◽  
Lateral Side ◽  
Trachemys Scripta Elegans ◽  
Alizarin Red ◽  
Softshell Turtles

Red-eared turtle and softshell turtles belong Cryptodira Suborder which has a different characteristic in neck length and head movement. The aim of this study was to determine of the axial skeleton anatomical structure including vertebrae, carapace and plastron of the red-eared turtle (Trachemys scripta elegans Wied, 1838) and softshell turtles (Amyda cartilaginea Boddaert, 1770) females. This research was carried out for five months starting from September 2013 to January 2014. The methods used in this study were th e X-Ray method, boiled bone and Alizarin Red S-Alcian blue staining. The result of research was analyzed descriptively comparatively by direct observation using a digital camera. Based on the results of the study the Red-eared turtle tortoise has a number of 7 cervical vertebrae, 9th vertebrae, sacral vertebrae 1 segment and vertebrae caudalis 27 segments. The anterior and posterior zygapophysis of the cervix elongate thus affecting the limited lateral movement. The thoracic center of the vertebrae adjusts the shape of the carapace. The sacralis vertebrae have 1 centrum segment extending on the lateral side attached to the carapace called the lateral pars, the caudal centrum is short and there is a shortened anterior zygapophysis structure. Whereas softshell turtles   have slender and long centrums. The anterior and posterior zygapophysis are smaller and allow the softshell turtles to perform more lateral movements. Centrum vertebrae of the thorachalis have a flat shape adjusting the shape of the carapace. Sacralis vertebrae have 2 centrum and 2 lateral pars extending and meeting each other to form a hole sacralia pelvina, centrum vertebrae caudalis extends and there is a neural spinal structure. Carapace of the red-eared turtle consists of fused pieces. Whereas the carapace in the softshell turtles consists of pieces covered by cartilage. The constituent component of carapace and plastron of the red-eared turtle consists of true bones completely, while the constituent components of the carapace and plastron of softshell turtles consist of true bones and cartilage on the sides and connective between the carapace and plastron.

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