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| Moraes Neto,Américo; Silva,Maelin da; Matoso,Daniele Aparecida; Vicari,Marcelo Ricardo; Almeida,Mara Cristina de; Collares-Pereira,Maria João; Artoni,Roberto Ferreira. |
| Karyotypic data are presented for four species of fish belonging to the Pimelodidae family. These species show a conserved diploid number, 2n = 56 chromosomes, with different karyotypic formulae. The analyzed species showed little amount of heterochromatin located preferentially in the centromeric and telomeric regions of some chromosomes. The nucleolus organizer regions activity (Ag-NORs) and the chromosomal location of ribosomal genes by fluorescent in situ hybridization (FISH), with 18S and 5S probes, showing only one chromosome pair marked bearer of ribosomal genes, the only exception was Pimelodus britskii that presented multiple NORs and syntenic location of the 18S and 5S probes. Non-Robertsonian events, as pericentric inversion and NORs duplication... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pseudoplatystoma reticulatum; Pimelodus britskii; Sorubim lima; Steindachneridion parahybae. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000100007 |
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| TAKEMOTO,R. M.; PAVANELLI,G. C.. |
| Between March 1992 and February 1996, 107 specimens of Sorubim lima were collected in the floodplain of the upper Paraná river. Ninety-five (88.78%) specimens were parasitized with at least one species of proteocephalid cestodes. 7,573 specimens of four different species were collected (average intensity 79.71 parasites/host): Paramonticellia itaipuensis Pavanelli & Rego, 1991; Nupelia portoriquensis Pavanelli & Rego, 1991; Spatulifer maringaensis Pavanelli & Rego, 1989 and Spasskyellina spinulifera Woodland, 1935. S. maringaensis was the most prevalent and abundant. There were three dominant species P. itaipuensis, S. maringaensis and N. portoriquensis) and one co-dominant species (S. spinulifera). The three environments (lotic,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ecology; Community structure; Size and sex influence; Sorubim lima; Proteocephalids; Upper Paraná river; Brazil. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000400006 |
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| PAVANELLI,G. C.; TAKEMOTO,R. M.. |
| One hundred and seven specimens of Sorubim lima (Bloch & Schneider, 1801) were collected in the floodplain of the upper Paraná River, Brazil between March 1992 and February 1996. Ninety-five specimens (88.78%) were parasited by at least a species of proteocephalid cestode. 7,573 parasites specimens of four different species were collected (average intensity 79.71 parasites/host): Paramonticellia itaipuensis Pavanelli & Rego, 1991; Nupelia portoriquensis Pavanelli & Rego, 1991; Spatulifer maringaensis Pavanelli & Rego, 1989 and Spasskyellina spinulifera (Woodland, 1935). The two most prevalent species, Spatulifer maringaensis and Paramonticellia itaipuensis, were parasiting the entire gastrointestinal tract. Nupelia... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ecology; Interspecific associations; Gastrointestinal distribution; Sorubim lima; Proteocephalids; Upper Paraná River; Brazil. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000400007 |
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