The karyotype of Cathorops sp, a marine catfish from Brazil

Gomes, Vicente; Phan, Van Ngan; Passos, Maria José de Arruda Campos Rocha

doi:10.1590/s0373-55241992000100007

Cited by 4 publications

(3 citation statements)

References 8 publications

(2 reference statements)

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“…mapale (2n = 52 - present study) and one unidentified species, Cathorops sp., that has 2n = 54 (Gomes et al , 1992). This difference in diploid numbers between species of a single genus was also found in Bagre (Fitzsimons et al , 1988; Gomes et al , 1990) (Table 1), suggesting that this is not a rare phenomenon among ariids.…”

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confidence: 99%

Cytogenetic analysis of three sea catfish species (Teleostei, Siluriformes, Ariidae) with the first report of Ag-NOR in this fish family

Nirchio¹,

Martinez

Foresti

et al. 2010

Genet. Mol. Biol.

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Despite their ecological and economical importance, fishes of the family Ariidae are still genetically and cytogenetically poorly studied. Among the 133 known species of ariids, only eight have been karyotyped. Cytogenetic analyses performed on Genidens barbus and Sciades herzbergii revealed that both species have 2n = 56 chromosomes and Cathorops aff. mapale has 2n = 52 chromosomes: Genidens barbus has 10 Metacentrics (M), 14 Submetacentrics (SM), 26 Subtelocentrics (ST), and 6 Acrocentrics (A), Sciades herzbergii has 14M, 20SM, 18ST and 4A, whereas Cathorops aff. mapale has 14M, 20SM, and 18ST. The nucleolus organizer regions (NORs) were found in a single chromosome pair on the short arm of a large-sized ST pair in Genidens barbus and on the short arm of a middle-size SM pair in Cathorops aff. mapale. Multiple NORs on the short arms of two large-sized ST pairs were found in Sciades herzbergii. The occurrence of diploid numbers ranging from 2n = 52 through 56 chromosomes and the presence of different karyotypic compositions, besides the number and position of NORs suggest that several numeric and structural chromosome rearrangements were fixed during the evolutionary history of this fish family.

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confidence: 99%

Cytogenetic analysis of three sea catfish species (Teleostei, Siluriformes, Ariidae) with the first report of Ag-NOR in this fish family

Nirchio¹,

Martinez

Foresti

et al. 2010

Genet. Mol. Biol.

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“…Cariotipos de diversas especies de esta familia han sido estudiados para buscar indicios de sus relaciones filogenéticas. No obstante, el análisis de la evolución cromosómica reflejada en el número y fórmulas cromosómicas han mostrado una marcada estabilidad cariotípica que no ofrecen utilidad para inferencias filogenéticas para este grupo (Le Grande, 1980;; García-Molina y Uribe-Alcocer, 1989; Gomes et al, 1992;; Uribe-Alcocer y Díaz-Jaimes, 2000). Otros estudios de caracteres genéticos basados en electroforesis de proteínas han sido altamente efectivos para detectar la variabilidad genética y para evaluar las relaciones interespecíficas entre los diferentes grupos de peces ; Ruiz-Carús y Uribe-Alcocer, 2003), incluyendo especies crípticas .…”

Section: Sinónimo Autorunclassified

“…The karyotypes of several species of this family have been made looking for clues of their phyletic relationships. Nevertheless, the analysis of chromosome evolution reflected in chromosome numbers and formulas have shown a remarkable karyotype stability not useful to make phylogenetic inferences about the group (Le Grande, 1980;Gomes et al, 1992;. Other studies of genetic characters based on protein elec-trophoresis have been highly effective to detect variability and to evaluate interspecific relationships among different fish groups Ruiz-Carús & Uribe-Alcocer, 2003).…”

Section: Introductionmentioning

confidence: 99%

Sistemática molecular de cinco especies de bagres de la familia Ariidae de México

Colín

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The systematics of the marine catfish of the family Ariidae is controversial because at the present time the number of species and genera in the family, or their relationships, remain uncertain. Phylogenetic relationships among five representative species of marine catfish of the family Ariidae from both the Pacific and the Atlantic coasts of Mexico were assessed by the analysis of the variability in 21 alloenzymatic loci, and by the comparison of the electrophoretic patterns of whole muscle proteins. Interspecific genetic divergence levels obtained by both electrophoretic methods showed a clear separation among the genera Cathorops, Bagre and Ariopsis, as well as in the studied species of Cathorops and Ariopsis, with Bagre marinus showing a greater genetic similarity with the Ariopsis group. Finally, our results contribute to the definition of the presence of this species in the coasts of the Gulf of Mexico

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A comparative study of two marine catfish (Siluriformes, Ariidae): Cytogenetic tools for determining cytotaxonomy and karyotype evolution

Sczepanski¹,

Noleto²,

Cestari³

et al. 2010

Micron

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The karyotype of Cathorops sp, a marine catfish from Brazil

Abstract: Cathorops sp has the diploid number of 54 chromosomes. The karyotype comprises lm + sm, 6m, 6sm and 14st pairs. This result is compared with those of other species of Ariidae, mainly Ariopsis felis and Arius dussumieri, found in literature.

Cited by 4 publications

References 8 publications

Cytogenetic analysis of three sea catfish species (Teleostei, Siluriformes, Ariidae) with the first report of Ag-NOR in this fish family

Cytogenetic analysis of three sea catfish species (Teleostei, Siluriformes, Ariidae) with the first report of Ag-NOR in this fish family

Sistemática molecular de cinco especies de bagres de la familia Ariidae de México

A comparative study of two marine catfish (Siluriformes, Ariidae): Cytogenetic tools for determining cytotaxonomy and karyotype evolution

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