%0 Journal Article
%T Abstract
%A Rafael Splendore de Borba
%A Claudio Henrique Zawadzki
%A Claudio Oliveira
%A Anabel Perdices
%J Neotropical Ichthyology
%D 2013
%I Sociedade Brasileira de Ictiologia
%X In this study, phylogenetic and phylogeographic analyses of populations identified as Hypostomus strigaticeps from the upper Paran芍 River basin were conducted in order to test whether these different populations comprises cryptic species or structured populations and to assess their genetic variability. The sequences of the mitochondrial DNA ATP sintetase (subunits 6/8) of 27 specimens from 10 populations (one from Mogi-Gua u River, five from Paranapanema River, three from Tiet那 River and one from Peixe River) were analyzed. The phylogeographic analysis showed the existence of eight haplotypes (A-H), and despite the ancestral haplotype includes only individuals from the Tiet那 River basin, the distribution of H. strigaticeps was not restricted to this basin. Haplotypes A, B and F were the most frequent. Haplotypes D, E, F, G, and H were present in the sub-basin of Paranapanema, two (A and B) were present in the sub-basin of the Tiet那 River, one (C) was exclusively distributed in the sub-basin of the Peixe River, and one (B) was also present in the sub-basin of the Grande River. The phylogenetic analysis showed that the populations of H. strigaticeps indeed form a monophyletic unit comprising two lineages: TG, with representatives from the Tiet那, Mogi-Gua u and Peixe Rivers; and PP, with specimens from the Paranapanema River. The observed degree of genetic divergence within the TG and PP lineages was 0.1% and 0.2%, respectively, whereas the genetic divergence between the two lineages themselves was approximately 1%. The results of the phylogenetic analysis do not support the hypothesis of existence of crypt species and the phylogeographic analysis confirm the presence of H. strigaticeps in other sub-basins of the upper Paran芍 River: Grande, Peixe, and Paranapanema sub-basins. Neste estudo, foram conduzidas an芍lises filogen谷ticas e filogeogr芍ficas de popula  es identificadas como Hypostomus strigaticeps na bacia do alto rio Paran芍 a fim de testar se essas popula  es compreendem esp谷cies cr赤pticas ou popula  es estruturadas e avaliar a variabilidade gen谷tica das mesmas. Foram analisadas sequ那ncias do DNA mitocondrial ATP sintetase (subunidades 6/8) de 27 esp谷cimes de 10 popula  es (uma do rio Mogi-Gua u, cinco do rio Paranapanema, tr那s do rio Tiet那 e uma do rio do Peixe). A an芍lise filogeogr芍fica mostrou a exist那ncia de oito hapl車tipos (A-H), e apesar do hapl車tipo ancestral incluir apenas indiv赤duos da bacia do rio Tiet那, a distribui  o de H. strigaticeps n o se restringe a esta bacia. Os hapl車tipos A, B e F foram os mais frequentes. D, E, F, G e H est o pre
%K ATPase
%K Bayesian Inference
%K Haplotype
%K Nested clade
%K Phylogeny
%U http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000100111