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	Provedor de dados BABT (1) Iheringia, Sér. Zool. (1) Autor Hartz,Sandra Maria (1) Margarido,Vladimir Pavan (1) Nunes,Daniela M. (1) Pellanda,Mateus (1) Rubert,Marceléia (1) Palavra-chave Oligosarcus (2) Acestrorhynchinae (1) Characidae (1) Chromosome banding (1) Cytogenetic studies (1) Reproduction (1) Southern Brazil (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2007 (1) 2004 (1) País Brazil (2) Idioma Inglês (1) Português (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Cytogenetic studies in three species of the genus Oligosarcus BABT Rubert,Marceléia; Margarido,Vladimir Pavan. Karyotypic studies were carried out on three species of the genus Oligosarcus: O. paranensis, O. pintoi, and O. longisrostris. All of them showed a diploid number of 50 chromosomes and the same karyotypic formulae (4M + 10SM + 16ST + 20A). Silver nitrate staining revealed single NORs in O. longirostris and multiple NORs in O. paranensis and O. pintoi. Heterochromatin seemed to play an important role in the chromosomal diversification of these species. Based on cytogenetical data, speciation hypotheses within this group were proposed, reinforcing the importance of chromosomal studies for a better understanding of evolution within the genus Oligosarcus, as well as within the family Characidae. Tipo: Info:eu-repo/semantics/article Palavras-chave: Cytogenetic studies; Oligosarcus; Acestrorhynchinae; Chromosome banding. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000100015 Dinâmica reprodutiva de Oligosarcus jenynsii e O. robustus (Characiformes, Characidae) na lagoa Fortaleza, Rio Grande do Sul, Brasil Iheringia, Sér. Zool. Nunes,Daniela M.; Pellanda,Mateus; Hartz,Sandra Maria. Oligosarcus jenynsii (Günther, 1864) and O. robustus Menezes, 1969 are fish species distributed in Rio Grande do Sul, Brazil, Uruguay, and northern Argentina. The reproductive period and recruitment, sex ratio, absolute and relative fecundity, and body length at first gonadal maturation of the two carnivorous species from Fortaleza Lagoon were analized. The specimens were sampled monthly, from May 2000 to April 2001, with fishing effort of 24 hours/month, using stationary gillnets of different mesh sizes and seine net (three samples per edge). The records of each individual included total length, total weight, gonad weight, sex and gonadal maturity stage. The reproductive period of both O. jenynsii and O. robustus ranges from May/June to November/December,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Oligosarcus; Reproduction; Characidae; Southern Brazil. Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212004000100001 Registros recuperados: 2 Primeira ... 1 ... Última

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