Filogeografia de Dinoponera lucida Emery (Hymenoptera: Formicidae) com base em DNA mitocondrial

• Autor(a) principal: Resende, Helder Canto
• Data de Publicação: 2008
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/4674
• topic: Dinoponera lucida; Filogeografia; Conservação; Dinoponera lucida; Phylogeography; Conservation; CNPQ::CIENCIAS BIOLOGICAS::GENETICA::GENETICA ANIMAL

Dinoponera lucida (Formicidae: Ponerinae) is a ant of black color and large size, up to four cm, with apterous females and smaller, winged males. There are no morphologically differentiated castes and the reproduction is carried out by fertilized workers known as gamergates . The species is on the Brazilian list of fauna threatened with extinction. Its distribution is restricted to the south of Bahia and to Espírito Santo in the Central Corridor of the Mata Atlântica. As a contribution to the elucidation of the type of geopgraphic distribution and population structure of the species, the phylogeography of D. lucida was studied from mitochondrial DNA. 1149 bp of the COI, COII and Cytb genes were sequenced. Phylogenetic trees were constructed by Bayesian Inference. Molecular variation, fixation indices, nucleotide and haplotype diversity indices were estimated. Haplotype networks were reconstructed by median-joining network. The type of phylogeography observed was phylogeographic structure with discontinuous genetic divergence and loss of intermediate haplotypes and populations with limited gene flow. The area of occurrence of the species has been intensely impacted by habitat loss and consequently isolation of remaining populations and preserved forests that represent modern ecological refuges for the species. The loss of the habitat also represents loss of intermediate haplotypes and the remaining populations presented exclusive haplotypes. The loss of any of these can not be replaced or compensated for by the conservation of any other. This implies the necessity of conservation efforts aiming to preserve as many as possible of the remaining areas that still harbour population of the D. lucida.