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Title: Phylogeography and population genetics of the endangered Amazonian manatee, Trichechus inunguis Natterer, 1883 (Mammalia, Sirenia)
Authors: Cantanhede, Andréa Martins
Silva, Vera Maria Ferreira da
Farias, Izeni P.
Hrbek, Tomas
Lazzarini, Stella Maris
Alves-Gomes, José Antônio
Keywords: Dna, Mitochondrial
Primer Dna
Biological Model
Comparative Study
Dna Sequence
Genetic Variability
Molecular Genetics
Nucleotide Sequence
Genetics, Population
Sequence Alignment
Statistical Model
Trichechus Inunguis
Base Sequence
Dna Primers
Dna, Mitochondrial
Genetics, Population
Likelihood Functions
Models, Genetic
Molecular Sequence Data
Sequence Alignment
Sequence Analysis, Dna
Trichechus Inunguis
Variation (genetics)
Trichechus Inunguis
Trichechus Manatus
Issue Date: 2005
metadata.dc.publisher.journal: Molecular Ecology
metadata.dc.relation.ispartof: Volume 14, Número 2, Pags. 401-413
Abstract: We used mitochondrial DNA control region sequences to examine phylogeography and population differentiation of the endangered Amazonian manatee Trichechus inunguis. We observe lack of molecular differentiation among localities and we find weak association between geographical and genetic distances. However, nested clade analysis supports restricted gene flow and/or dispersal with some long-distance dispersal. Although this species has a history of extensive hunting, genetic diversity and effective population sizes are relatively high when compared to the West Indian manatee Trichechus manatus. Patterns of mtDNA haplotype diversity in T. inunguis suggest a genetic disequilibrium most likely explained by demographic expansion resulting from secession of hunting and enforcement of conservation and protective measures. Phylogenetic analysis of T. manatus and T. inunguis haplotypes suggests that T. inunguis is nested within T. manatus, effectively making T. manatus a paraphyletic entity. Paraphyly of T. manatus and recent divergence times of T. inunguis and the three main T. manatus lineages suggest a possible need for a taxonomic re-evaluation of the western Atlantic Trichechus.
metadata.dc.identifier.doi: 10.1111/j.1365-294X.2004.02413.x
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