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Aspects of the ecology of proteocephalid cestodes parasites of Sorubim lima (Pimelodidae) of the upper Paraná River, Brazil: I. Structure and influence of host's size and sex BJB
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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Aspects of the ecology of proteocephalid cestodes, parasites of Sorubim lima (Pimelodidae), of the upper Paraná River, Brazil: II. Interspecific associations and distribution of gastrintestinal parasites BJB
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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Karyotype variability in neotropical catfishes of the family Pimelodidae (Teleostei: Siluriformes) Neotropical Ichthyology
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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