Topic
Geoemydidae
About: Geoemydidae is a research topic. Over the lifetime, 82 publications have been published within this topic receiving 1031 citations.
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24 Sep 2019
TL;DR: The methodology of microsatellite isolation constructed in this study is not only cost-effective and time-saving in comparison to traditional approaches, but also can be served as useful tools which benefit population genetics studies and conservation management of M. reevesii.
Abstract: Mauremys reevesii (Gray, 1831), which belongs to Mauremys of Geoemydidae (Testudines), distributed in China, as well as Japan and Korea. Previous studies have developed several polymorphic microsat...
1 citations
TL;DR: The present findings suggest that O. borneensis had a wider distribution in the past, but the Java population would have become extinct by the end of the Middle Pleistocene.
Abstract: A fossil identified as Orlitia borneensis was found from the river bottom of the Solo River in Sambungmacan, eastern Central Java, Indonesia. The sandy matrix attached to the specimen strongly suggests that it was eroded out from the Middle Pleistocene fluvial deposit on the river bank, as most of the assorted vertebrate fossils have been found from this area. Because two fragmentary fossils that were previously referred to this species from the Lower Pleistocene of Trinil lack diagnostic morphological characteristics, the specimen reported here is the first certain fossil record of the species from Java. The present findings suggest that O. borneensis had a wider distribution in the past, but the Java population would have become extinct by the end of the Middle Pleistocene.
1 citations
TL;DR: A close genetic similarity among sampled turtles was further confirmed by sequencing the nuclear R35 gene, while the geometric morphometrics of the shell-shape were likewise similar, and the examined captive population of O. borneensis may be further treated as a single conservation unit.
Abstract: The Malaysian Giant Turtle (Orlitia borneensis) is a poorly known turtle with rapidly decreasing numbers in nature in spite of its strong protection on paper. Most individuals of this species kept in European zoos and included in captive breeding programs are confiscates from the illegal trade for food consumption and their geographic provenance is unknown. This study was aimed to assess genetic and phenotypic variation of the founders of this captive population. We sequenced the mitochondrial cytochrome b gene and found 23 haplotypes. We constructed a haplotype network and examined demographic changes by Bayesian skyline plots of the effective population size. The maximum sequence divergence was less than 1.5% and the phylogenetic structure of the haplotypes was supported poorly. A close genetic similarity among sampled turtles was further confirmed by sequencing the nuclear R35 gene, while the geometric morphometrics of the shell-shape were likewise similar. Thus, the examined captive population of O. borneensis may be further treated as a single conservation unit.
1 citations
TL;DR: The complete mitochondrial genome of the Vietnamese three-striped box turtle (Cuora cyclornata) was first determined, consisting of 37 genes typically found in other vertebrates, and a remarkable feature was found in the control region: a large number of (TTATTATA)10 direct tandem repeats followed by (TTATA)n (n = 10, 8 and 1).
Abstract: The complete mitochondrial genome of the Vietnamese three-striped box turtle (Cuora cyclornata) was first determined in this study. It was a circular molecule of 16,594 bp in length, consisting of 37 genes typically found in other vertebrates. The AT content of the overall base composition of the whole mitogenome was 60.39%, while the control region was 70.23%. Two ETAS and 4 CSBs were identified, while a remarkable feature was found in the control region: a large number of (TTATTATA)10 direct tandem repeats followed by (TTATA)n (n = 10, 8 and 1), which were spaced into three domains by (TA)n (n = 1, 1 and 2). The sequence information could play an important role in the study of phylogenetic relationships in turtles and preservation of genetic resources for helping conservation of the endangered species.
1 citations
TL;DR: Reporting the nematode F. araxiana from M. caspica constitutes a new record for Iraqi parasitic fauna as well as a new host record and expands the geographical distribution of this parasite to include Armenia, Iran and Iraq.
Abstract: The caspian turtle Mauremys caspica (Gmelin, 1774) is a medium-sized semi aquatic freshwater turtle. It is widely distributed in suitable areas throughout Iraq. A total of 28 road-killed specimens have been examined for their intestinal helminthic parasites. Results have been showed that 78.6% of this turtle were infected with one or more of following parasite species of Telorchis assula (Trematoda), Falcaustra araxiana, Serpinema microcephalus, and Contracaecum sp. (Nematoda).The statistical analysis showed that there were significant differences in prevalence between male and female turtles in parasitic infections (P<0.05) as the percentage of females was higher than males. Morphometric and meristic description for the helminthes have been provided. Reporting the nematode F. araxiana from M. caspica in this study constitutes a new record for Iraqi parasitic fauna as well as a new host record. It also expands the geographical distribution of this parasite to include Armenia, Iran and Iraq. A description based on measurements and number of these worms was given.
1 citations