47 research outputs found
RevisĂŁo do gĂȘnero oligosarcus gĂŒnther, 1864 (actynopterigii, characidae) para o sistema da laguna dos patos
Reproductive period, fecundity and histology of gonads of two cheirodontines (Ostariophysi: Characidae) with different reproductive strategies - insemination and external fertilization
Trophic strategy of Atlantirivulus riograndensis (Cyprinodontiformes: Rivulidae), a non-annual rivulid threatened by extinction, in a perennial environment, Brazil)
Reproductive biology of Bryconamericus iheringii (Ostariophysi: Characidae) from rio VacacaĂ, RS, Brazil
Diet-morphology relationship in the stream-dwelling characid Deuterodon stigmaturus (Gomes, 1947) (Characiformes: Characidae) is partially conditioned by ontogenetic development
Biologia reprodutiva de Pachyurus bonariensis (Perciformes, Sciaenidae) na fase pré-represamento do arroio Taquarembó, Sul do Brasil
Biologia alimentar de quatro espécies simpåtricas de Cheirodontinae (Characiformes, Characidae) do rio Cearå Mirim, Rio Grande do Norte
Estudo comparado da taxocenose de peixes em dois ambientes aquĂĄticos do Parque Estadual de ItapuĂŁ, sul do Brasil
Biologia alimentar de Steindachnerina brevipinna (Characiformes, Curimatidae) do rio IbicuĂ-mirim, Rio Grande do Sul, Brasil Feeding biology of Steindachnerina brevipinna (Characiformes, Curimatidae) in the IbicuĂ-mirim river, Rio Grande do Sul, Brazil
The feeding biology of Steindachnerina brevipinna (Eigenmann & Eigenmann, 1889) is described based on specimens collected in the IbicuĂ-Mirim river, Rio Grande do Sul, Brazil, from April 2001 to March 2002. Diet description is based on the analysis of the frequency of occurrence and index of dietary importance of the ingested items. The monthly variation of stomach repletion, hepatosomatic and intestinal indexes was also analyzed. Major feeding activity occurred before (May, June and July 2001) the reproductive period, with the hepatosomatic index values showing similar variation along the year. Both the mean intestinal quotient and the analysis of the main ingested items (Bacillariophyta and Chlorophyta algae) indicate a detritivorous diet
Biologia alimentar de Steindachnerina brevipinna (Characiformes, Curimatidae) do rio IbicuĂ-mirim, Rio Grande do Sul, Brasil
The feeding biology of Steindachnerina brevipinna (Eigenmann & Eigenmann, 1889) is described based on specimens collected in the IbicuĂ-Mirim river, Rio Grande do Sul, Brazil, from April 2001 to March 2002. Diet description is based on the analysis of the frequency of occurrence and index of dietary importance of the ingested items. The monthly variation of stomach repletion, hepatosomatic and intestinal indexes was also analyzed. Major feeding activity occurred before (May, June and July 2001) the reproductive period, with the hepatosomatic index values showing similar variation along the year. Both the mean intestinal quotient and the analysis of the main ingested items (Bacillariophyta and Chlorophyta algae) indicate a detritivorous diet