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	Provedor de dados Rev. Bras. Zool. (1) BABT (1) Genet. Mol. Biol. (1) Autor Aranha,José Marcelo R. (1) Fogaça,Fábio N. O. (1) Foresti,Fausto (1) Gomes,José Henrique C. (1) Oliveira,Claudio (1) Pansonato-Alves,José Carlos (1) Pompeu,Paulo S. (1) Souza,Rafael C. R. (1) Mais... Palavra-chave Characidium (3) 18S rDNA (1) 5S rDNA (1) Atlantic Forest (1) Characidiinae (1) Coastal Stream (1) Environmental pressure (1) Feeding (1) Habitat use (1) Heterochromatin (1) Intraspecific differences (1) Morphology (1) Natural triploidy (1) Sympatric species (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Ano 2020 (1) 2011 (1) 2000 (1) País Brazil (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Karyotypic conservatism in samples of Characidium cf. zebra (Teleostei, Characiformes, Crenuchidae): physical mapping of ribosomal genes and natural triploidy Genet. Mol. Biol. Pansonato-Alves,José Carlos; Oliveira,Claudio; Foresti,Fausto. Basic and molecular cytogenetic analyses were performed in specimens of Characidium cf. zebra from five collection sites located throughout the Tietê, Paranapanema and Paraguay river basins. The diploid number in specimens from all samples was 2n = 50 with a karyotype composed of 32 metacentric and 18 submetacentric chromosomes in both males and females. Constitutive heterochromatin was present at the centromeric regions of all chromosomes and pair 23, had additional interstitial heterochromatic blocks on its long arms. The nucleolar organizer regions (NORs) were located on the long arms of pair 23, while the 5S rDNA sites were detected in different chromosomes among the studied samples. One specimen from the Alambari river was a natural triploid and had... Tipo: Info:eu-repo/semantics/article Palavras-chave: Characidium; Heterochromatin; 18S rDNA; 5S rDNA; Natural triploidy. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000200007 Ecological separation by ecomorphology and swimming performance between two congeneric fish species Rev. Bras. Zool. Souza,Rafael C. R.; Pompeu,Paulo S.. ABSTRACT The high diversity of freshwater fish species reflects a great morphological plasticity. Understanding the relationship between swimming capacity, morphology and habitat use may be important to predict the chances of finding a species at an anthropized environment. The swimming capacity and morphological aspects of two sympatric species of Characidium, and for which spatial segregation in different hydraulic habitats is known, were compared in this study. Twenty-one individuals of Characidium fasciatum Reinhardt, 1867 and 23 individuals of Characidium cf. zebra Eigenmann, 1909 were captured and used for the evaluation of the swimming capacity and ecomorphological attributes. The swimming capacity of each species was obtained by measuring critical... Tipo: Info:eu-repo/semantics/article Palavras-chave: Characidium; Environmental pressure; Habitat use; Intraspecific differences; Morphology. Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702020000100322 Feeding of two sympatric species of Characidium, C. lanei and C. pterostictum (Characidiinae) in a coastal stream of Atlantic Forest (Southern Brazil) BABT Aranha,José Marcelo R.; Gomes,José Henrique C.; Fogaça,Fábio N. O.. The feeding strategy of Characidium lanei and C. pterostictum was studied in the "Cabral" stream, a coastal stream of the Atlantic Forest, in southern Brazil. The samples were taken using electric fishing between March/95 and February/96. We studied about 15 stomach contents for each species in each season of the year. The stomach contents of the studied species were composed of 39 different food items, 28 in C. lanei and 24 in C. pterostictum. Chironomidae larvae and Ephemeroptera nymph were the most important items for C. lanei, except in the summer when Acarina and not identified Arthropoda were the most important items. Chironomidae and Simulidae larvae were the most important items in C. pterostictum. These results indicated an insectivorous habits... Tipo: Info:eu-repo/semantics/article Palavras-chave: Feeding; Sympatric species; Atlantic Forest; Coastal Stream; Characidiinae; Characidium. Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000500013 Registros recuperados: 3 Primeira ... 1 ... Última

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