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| Arruda,Mauricio P.; Costa,William P.; Recco-Pimentel,Shirlei M.. |
| Abstract The Morato's Digger Toad, Proceratophrys moratoi, is a critically endangered toad species with a marked population decline in southern Brazilian Cerrado. Despite this, new populations are being discovered, primarily in the northern part of the distribution range, which raises a number of questions with regard to the conservation status of the species. The present study analyzed the genetic diversity of the species based on microsatellite markers. Our findings permitted the identification of two distinct management units. We found profound genetic structuring between the southern populations, on the left margin of the Tietê River, and all other populations. A marked reduction was observed in the contemporary gene flow among the central populations... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Proceratophrys moratoi; Microsatellite; Population structure; Management unit; Conservation. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572017000300502 |
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| Castro,Márcio Siqueira; Recco-Pimentel,Shirlei M.; Rocha,Guaracy Tadeu. |
| The karyotypes of nine species of the family Ramphastidae were determined and compared with that of the toco toucan (Ramphastos toco), the only ramphastid karyotype so far reported in the literature. Differences in the morphology of the largest chromosomes allowed to identify three karyotype groups. The first group included the species R. toco, Baillonius bailloni, Pteroglossus castanotis, P. aracari and Selenidera maculirostris, in which only the first pair of chromosomes was metacentric. The second group included four Ramphastos species (R. dicolorus, R. ariel, R. vitellinus, R. tucanus cuvieri) with two pairs of metacentric macrochromosomes (the first and the seventh). The third group was represented by a single species, A. laminirostris, in which all... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Karyotypes; Rhamphastidae; Toucans. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572002000200006 |
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| Ernetti,Julia R.; Gazolla,Camilla B.; Recco-Pimentel,Shirlei M.; Luca,Elaine M.; Bruschi,Daniel P.. |
| Abstract The monkey frog, Pithecopus rusticus (Anura, Phyllomedusidae) is endemic to the grasslands of the Araucarias Plateau, southern Brazil. This species is known only from a small population found at the type locality. Here, we analyzed for the first time the chromosomal organization of the repetitive sequences, including seven microsatellite repeats and telomeric sequences (TTAGGG)n in the karyotype of the species by Fluorescence in situ Hybridization. The dinucleotide motifs had a pattern of distribution clearly distinct from those of the tri- and tetranucleotides. The dinucleotide motifs are abundant and widely distributed in the chromosomes, located primarily in the subterminal regions. The tri- and tetranucleotides, by contrast, tend to be... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amphibia; Fluorescence in situ Hybridization; Repetitive DNA. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572019000500301 |
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| Lourenço,Luciana B.; Garcia,Paulo C.A.; Recco-Pimentel,Shirlei M.. |
| Physical maps of the ribosomal RNA gene 28S of species belonging to the genera Paratelmatobius and Scythrophrys were constructed, using five restriction endonucleases. The restriction sites for Bam HI, Bgl II, Bst EII, and Eco RI had similar positions in all species, although there were interspecific differences in the size of the restriction fragments obtained. An additional Pvu II site was found in Scythrophrys specimens from Piraquara (State of Paraná, Brazil) and from São Bento do Sul (State of Santa Catarina, Brazil), but not in the Scythrophrys specimens from Rancho Queimado (State of Santa Catarina, Brazil). This finding is in agreement with the hypothesis regarding the existence of two species in the genus Scythrophrys. On the other hand, the extra... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ribosomal DNA; 28S rDNA gene; Restriction sites; Physical map; Paratelmatobius; Scythrophrys; Leptodactylidae; Anura. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572003000200006 |
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| Siqueira,Sérgio; Aguiar Jr.,Odair; Pansonato,André; Giaretta,Ariovaldo A.; Strüssmann,Christine; Martins,Itamar; Recco-Pimentel,Shirlei M.. |
| A recent substantial rearrangement of the 882 described eleutherodactyline frog species has considerably improved the understanding of their systematics. Nevertheless, many taxonomic aspects of the South American eleutherodactyline species remain unknown and require further investigation using morphological, cytogenetic and molecular approaches. In this work, the karyotypes of the Brazilian species Ischnocnema juipoca (Atibaia and Campos do Jordão, SP), Barycholos cf. ternetzi (Uberlândia, MG, and Porto Nacional, TO), and Pristimantis crepitans (Chapada dos Guimarães and São Vicente, MT) were analyzed using Giemsa staining, Ag-NOR labeling, and C-banding techniques. All individuals had a diploid number of 22 chromosomes, but the Fundamental Numbers were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cytogenetics; Barycholos; Ischnocnema; Pristimantis; Ag-NOR; C-banding. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000300008 |
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