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| Melo,Aline Grasielle Costa de; Varela,Eduardo Sousa; Beasley,Colin Robert; Schneider,Horacio; Sampaio,Iracilda; Gaffney,Patrick Michael; Reece,Kimberly S.; Tagliaro,Claudia Helena. |
| Oysters (Ostreidae) manifest a high degree of phenotypic plasticity, whereby morphology is of limited value for species identification and taxonomy. By using molecular data, the aim was to genetically characterize the species of Crassostrea occurring along the Brazilian coast, and phylogenetically relate these to other Crassostrea from different parts of the world. Sequencing of the partial cytochrome oxidase c subunit I gene (COI), revealed a total of three species of Crassostrea at 16 locations along the Brazilian coast. C. gasar was found from Curuçá (Pará state) to Santos (São Paulo state), and C. rhizophorae from Fortim (Ceará state) to Florianópolis (Santa Catarina state), although small individuals of the latter species were also found at Ajuruteua... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Genetic identification; Oysters; Biogeography; COI gene; Ostreidae. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000300030 |
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| Tagliaro,Claudia Helena; Schneider,Horacio; Sampaio,Iracilda; Schneider,Maria Paula Cruz; Vallinoto,Marcelo; Stanhope,Michael. |
| The systematics of the subfamily Callitrichinae (Platyrrhini, Primates), a group of small monkeys from South America and Panama, remains an area of considerable discussion despite many investigations, there being continuing controversy over subgeneric taxonomic classifications based on morphological characters. The purpose of our research was to help elucidate the phylogenetic relationships within the monkey genus Saguinus (Callitrichinae) using a molecular approach to discover whether or not the two different sections containing hairy-faced and bare-faced species are monophyletic, whether Saguinus midas midas and Saguinus bicolor are more closely related than are S. midas midas and Saguinus midas niger, and if Saguinus fuscicollis melanoleucus and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Saguinus; Callitrichinae; ND1; Phylogeny; MtDNA; Conservation. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000100009 |
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| Tagliaro,Claudia Helena; Schneider,Maria Paula Cruz; Schneider,Horacio; Sampaio,Iracilda; Stanhope,Michael. |
| Traditional classifications of Platyrrhini monkeys, based mainly on morphological features, are being contested by recent molecular data. The subfamily Callitrichinae (Platyrrhini, Primates) consists of a diverse group of species, many of them considered endangered. Our analysis of two DNA regions, a mtDNA gene (ND1) and a nuclear gene (intronic regions of the transferrin gene), suggests that Callithrix pygmaea may have sufficient variability to justify the existence of subspecies or even separate species. Phylogenetic dendrograms based on the ND1 region show that this species is more closely related to Amazonian than to Atlantic forest marmosets. These results reopen the discussion about diversity and conservation programs based exclusively on traditional... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572000000400006 |
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| Arruda,Cinthya Cristina Bulhões; Beasley,Colin Robert; Vallinoto,Marcelo; Marques-Silva,Nelane do Socorro; Tagliaro,Claudia Helena. |
| Four Brazilian populations of Anomalocardia brasiliana were tested for mutual genetic homogeneity, using data from 123 sequences of the mtDNA cytochrome oxidase c subunit I gene. A total of 36 haplotypes were identified, those shared being H3 (Canela Island, Prainha and Acupe) and both H5 and H9 (Prainha and Acupe). Haplotype diversity values were high, except for the Camurupim population, whereas nucleotide values were low in all the populations, except for that of Acupe. Only the Prainha population showed a deviation from neutrality and the SSD test did not reject the demographic expansion hypothesis. Fst values showed that the Prainha and Acupe populations represent a single stock, whereas in both the Canela Island and Camurupim stocks, population... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: MtDNA; COI; Population; Anomalocardia brasiliana; Conservation. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000200033 |
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