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Title: Population genetics analysis of Podocnemis sextuberculata (Testudines, Podocnemidae): Lack of population structure in the central Amazon Basin
Authors: Silva, Themis Jesus
Monjeló, Luiz Alberto dos Santos
Viana, Maria N.S.
Pezzuti, Juarez Carlos Brito
Andrade, Paulo César Machado
Vogt, Richard Carl
Farias, Izeni P.
Keywords: Animals Experiment
Freshwater Species
Gene Sequence
Genetic Variability
Mitochondrial Gene
Nd1 Gene
Nucleic Acid Base Substitution
Podocnemis Sextuberculata
Population Genetic Structure
Population Migration
River Basin
Dna, Mitochondrial
Genetics, Population
Podocnemis Sextuberculata
Issue Date: 2011
metadata.dc.publisher.journal: Genetics and Molecular Research
metadata.dc.relation.ispartof: Volume 10, Número 3, Pags. 1393-1402
Abstract: The chelonians are, in general, important for the economy of the traditional populations of the Amazon region, especially as a source of animal protein. Furthermore, sub-products, such as eggs and fat, are utilized in the manufacture of cosmetics, and the plastron and carapace are used in the manufacture of adornments. The freshwater turtle species Podocnemis sextuberculata, locally known as "iaçá" or "pitiú", is widely distributed in the Amazon Basin in Brazil and also in Colombia and Peru. This species is on the International Union for Conservation of Nature Red List in the category of vulnerable species. We examined the genetic variability and population structure of three populations represented by 64 individuals sampled from Reserva Federal de Abufari, Tapauá, Amazonas State; Reserva de Desenvolvimento Sustentável Mamirauá, Tefé, Amazonas State, and Terra Santa, Pará State. All of these are over 1000 km from each other. A partial 415-bp sequence of the mitochondrial gene ND1 was utilized as a molecular marker. Seven haplotypes were observed; the most common haplotype was shared by all the areas sampled, while the rarest haplotypes were represented by a single individual and were thus restricted to a single locality. The sharing of the most common haplotype, the high number of migrants (Nm) and the AMOVA results indicate a lack of genetic structure among the sampling localities. The levels of genetic variability observed were homogeneous among the sampling localities. These results (O{middle tilde} ST and Nm) are compatible with what is known about the ecology of this species, which has a great migratory capacity. © FUNPEC-RP.
metadata.dc.identifier.doi: 10.4238/vol10-3gmr1163
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