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Population genetic analysis of Caiman crocodilus (Linnaeus, 1758) from South America
Provedor de dados: 74
Autores: Vasconcelos,William R.; Hrbek,Tomas; Silveira,Ronis da; Thoisy,Benoit de; Marioni,Boris; Farias,Izeni P.
The genetic structure of Caiman crocodilus was investigated using a 1085 bp mtDNA fragment of the cytochrome b gene. Inferences were based on 125 individuals from nine localities in Peru, Brazil and French Guiana. With the exception of Mamirauá Lake, Anavilhanas Archipelago and the Tapará Community which show a signal of demographic expansion, the sampled localities are in a mutation-drift genetic equilibrium. Divergence between the Amazon basin and extra-Amazon basin localities is significant; however, inference from Nested Clade Analysis cannot distinguish between continuous range expansion, long distance colonization or past fragmentation; however, past fragmentation is unlikely due to low number of mutational steps separating these two regions. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genetic structure; Phylogeography; Genetic diversity; Demographic expansion; Cytochrome b; Caiman crocodilus.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000200006