Showing papers on "Geoemydidae published in 2014"
TL;DR: The genetic structure in the vast majority of the species' range has been shaped by massive transoceanic gene flow, which is unlikely for the northernmost populations, which seem rather to be genetically impacted by intentionally released foreign turtles.
Abstract: The freshwater turtle Mauremys rivulata ranges from the Adriatic coast of the Balkan Peninsula through the Aegean region and coastal western and southern Turkey southwards to Israel. In addition, it occurs on several Aegean islands, Crete and Cyprus. Previous investigations using mtDNA sequences found virtually no genetic differentiation across its distribution range, despite some major biogeographical barriers for terrestrial and freshwater biota. Thus, the absence of any phylogeographical differentiation would be unexpected. To re-examine genetic differentiation within M. rivulata, here we use a comprehensive rangewide sampling and information of 13 unlinked polymorphic microsatellite loci and compare these data against mtDNA variation. Our microsatellite analyses reveal a weak population structuring which conflicts, however, with most biogeographical barriers. We conclude that the genetic structure in the vast majority of the species' range has been shaped by massive transoceanic gene flow. This explanation is unlikely for the northernmost populations, which seem rather to be genetically impacted by intentionally released foreign turtles.
19 citations
TL;DR: The taxonomy of the freshwater turtle subgenus Ptychogaster (Temnoclemmys) (Testudines, Geoemydidae, Ptycheasterinae) is revised based on new and previously published material from the Valles-Penedes Basin this paper.
5 citations
01 Jan 2014
TL;DR: With the exception of Trionychidae, the remaining cryptodiran clades are still present in the South American chelonian fauna.
Abstract: Aquatic cryptodiran turtles of the clades Emydidae, Chelydridae, Geoemydidae, Kinosternidae, and Trionychidae are the most recent Mesoamerican immigrants to South America, arriving in various waves from the Miocene 12 million years ago (prior to the emergence of the Panamanian Isthmus) to the Plio-Pleistocene and Holocene (after the establishment of this isthmus). With the exception of Trionychidae, the remaining cryptodiran clades are still present in the South American chelonian fauna.
3 citations
TL;DR: Skeletal remains of the geoemydid turtle, Mauremys mutica, were recovered from the lower layer of the Tugurubama archeological site on Yonagunijima Island and offer strong support for the indigenous nature of the current Yaeyama populations of M. mutica.
Abstract: Skeletal remains of the geoemydid turtle, Mauremys mutica, were recovered from the lower layer of the Tugurubama archeological site on Yonagunijima Island, which corresponds to the period from the late middle to early late Holocene (ca., 4,000 yBP). These represent the first concrete evidence for the prehistoric occurrence of this turtle in the Yaeyama Islands and offer strong support for the indigenous nature of the current Yaeyama populations of M. mutica.
2 citations
01 Jan 2014
TL;DR: Characterization of the genetic diversity of Rhinoclemmys nasuta population inhabits Isla Palma (Malaga Bay, Valle del Cauca) was carried out using three microsatellite systems, two of which were found to be monomorphic, while the system Cm58 had a high PIC, allowing to estimate the genetic Diversity of this population.
Abstract: Characterization of the genetic diversity of Rhinoclemmys nasuta population inhabits Isla Palma (Malaga Bay, Valle del Cauca) was carried out using three microsatellite systems (Cm72 , Cm58 and Cm3). In this locality, individuals of R. nasuta are widely distributed in the inland streams and creeks system. 100 to 200 mL of peripheral blood was taken off from ten turtles in five streams of the island, preserving samples in a 0.5 M EDTA. DNA was extracted using Salting-out and Chelex solution techniques. PCR amplified products were visualized and measured in polyacrylamide gels stained with silver nitrate. Successful amplification products were obtained for all systems analyzed, two of which (Cm72 and Cm3) were found to be monomorphic, while the system Cm58 had a high PIC (0.698) allowing to estimate the genetic diversity of this population. The observed heterozygosity
2 citations
01 Jan 2014
TL;DR: In this paper, the authors describe the implementation of the method to analyze the mitochondrial DNA control sequence (mtDNA) of R. nasuta in order to generate tools for future studies in systematics and population conservation.
Abstract: Rhinoclemmys nasuta (Testudines:Geoemydidae) is considered an almost endemic specie to Colombia and the most primitive species of Rhynoclemmys. However, it is classified data deficient by IUCN because the available information is not enough to make a direct or indirect assessment of its extinction risk. Here, we describe the implementation of the method to analyze the mitochondrial DNA control sequence (mtDNA) of R. nasuta in order to generate tools for future studies in systematics and population conservation. Genomic mtDNA was extracted by salting-out from blood samples from Isla Palma and Playa Chucheros (Bahia Malaga–Colombian Pacific Coast) and we used a pair of degenerate primers (reported for Chrysemys picta, Testudines:Emydidae) to perform amplification. Fragments of 800pb were obtained and the sequencing reaction was effective. A homology percentage above of 92 % was established between the obtained sequences and mtDNA sequences from Sacalia quadriocellata (Testudines:Geoemydidae) ,and Cuora aurocapitata (Testudines:Geoemydidae) reported in the GenBank.