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| Silva,Wemerson C. da; Marceniuk,Alexandre P.; Sales,João Braullio L.; Araripe,Juliana. |
| ABSTRACT Coastal and marine environments are characterized by a lack of evident physical barriers or geographic isolation, and it may be difficult to understand how divergence can arise and be sustained in marine environments. The identification of 'soft' barriers is a crucial step towards the understanding of gene flow in marine environments. The marine catfishes of the family Ariidae are a demersal group with restricted migratory behavior, no pelagic larval stages, and mechanisms of larval retention, representing a potentially useful model for the understanding of historical processes of allopatric speciation in the marine environment. In the present study, two lineages of the Coco sea catfish, Bagre bagre , were recognized from their complete... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Genetics; Morphological; Pleistocene; Sea level variations; Species evolution. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000200214 |
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| Nogueira,Fabrícia; Rêgo,Péricles S. do; Queiroz,Helder; Venere,Paulo; Varela,Eduardo S.; Sampaio,Iracilda; Schneider,Horacio; Araripe,Juliana. |
| Abstract Arapaima is a widely-distributed fish of enormous economic importance in the Amazon region. In the present study, a total of 232 specimens were sampled, 121 from five sites in the Amazon basin and 111 from five sites in the Tocantins-Araguaia basin. The analyses investigated fragments of the Cytochrome b, Control Region, Cytochrome Oxidase I, NADH dehydrogenase subunit 2 and seven loci microsatellites. The analyses revealed the existence of two mitochondrial lineages within the general area, with no haplotypes shared between basins, and genetic variability significantly higher in the Amazon than in the Tocantins-Araguaia basin. Two divergent, but sympatric mitochondrial lineages were found in the Amazon basin, but only a single lineage in the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazon Basin; Tocantins-Araguaia Basin; Lineages; Structure population; Conservation. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652020000100703 |
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| Cunha,Williana T. R.; Santos,Rita C. O.; Araripe,Juliana; Sampaio,Iracilda; Schneider,Horacio; Rêgo,Péricles S.. |
| Abstract In the present study, we investigated the possible existence of new lineages of peripatids through comparisons between known Neotropical species and specimens obtained from two locations in Pará, a state in eastern Brazilian Amazonia using a molecular approach based on sequences of the mtDNA genes COI, 16Sr RNA, and 18S RNA. The analyses included also sequences of Asian and African taxa for a more systematic understanding of the phylogenetic relationships within the group. The analysis of the COI, 16S rRNA and 18S RNA sequences permitted the identification of three distinct lineages (A, B and C) based on two different phylogenetic approaches (Bayesian methods and ML). The three lineages presented here are completely distinct from all other... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazonia; New lineages; Peripatidae; Phylogeny; Onychophora. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572017000100147 |
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| Vallinoto,Marcelo; Araripe,Juliana; Rego,Péricles S. do; Tagliaro,Claudia H.; Sampaio,Iracilda; Schneider,Horacio. |
| The Saguinus represent the basal genus of the Callitrichinae subfamily. Traditionally this genus is divided into three groups: Hairy, Mottled and Bare-face, however, molecular data failed to validate these groups as monophyletic units, as well as raised some subspecies to the species status. This is the case of the former subspecies Saguinus midas midas and S. midas niger, which are now considered as different species. In the present study, we sequenced a portion of the D-loop mtDNA region in populations from the East bank of the Xingu and from both banks of the Tocantins river, in order to test the effectiveness of large rivers as barriers to the gene flow in Saguinus. According to our results, the populations from the East and West banks of the Tocantins... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Primates; Saguinus niger; D-loop; MtDNA; Tocantins river. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000200005 |
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