Results 1 to 10 of about 66 (60)
Brazilian Archives of Biology and Technology, 1999 Aspects of the reproductive biology of one Tetragonopterinae was assessed in the Ubatiba river - Maricá / RJ. Length structure and mean size suggested sexual dimorphism, females reaching larger sizes than males.
Rosana Mazzoni
exaly +3 more sources
Genetics and Molecular Biology, 2003 A cytogenetic analysis of thirteen specimens of Bryconamericus aff. Iheringii revealed a diploid number of 52 chromosomes and a karyotype of 8M+22SM+10ST+12A with a fundamental number (FN) of 92.
Lucia Giuliano-Caetano +2 more
exaly +3 more sources
Acta Limnologica Brasiliensia, 2017 Aim: This study records Gyrodactylus neotropicalis and Anacanthocotyle anacanthocotyle in new hosts: Astyanax lacustris and Moenkhausia forestii, on the upper Paraná river floodplain. Besides, ecological aspects of the parasites distribution are explored.
Ricardo Takemoto
exaly +3 more sources
Genetics and Molecular Biology, 1998 Cytogenetic and morphological studies were carried out on nine local populations of Astyanax scabripinnis paranae. All populations exhibited 2n = 50 chromosomes as well as conspicuous differences involving karyotype morphology, number and position of ...
Fausto Foresti +2 more
exaly +2 more sources
Brazilian Journal of Biology, 2003 In the present study, we describe feeding habits of Deuterodon sp. from the Ubatiba River and explore if diet changes according to a temporal cycle of dry and wet seasons. We observed that Deuterodon sp.
Rosana Mazzoni, Carla Ferreira Rezende
exaly +2 more sources
DNA extracted from museum specimens of the 19th century provides a taxonomic resolution on the identity of the characid fish Psalidodon jequitinhonhae (Ostariophysi: Characiformes) [PDF]
Neotropical Ichthyology, 2023 Psalidodon jequitinhonhae was originally proposed as a variety of Tetragonopterus rutilus, based on the analysis of 14 specimens from the Jequitinhonha River, Brazil. In 1910 it was relocated in Astyanax, as A.
Victor de Queiroz +5 more
doaj +1 more source
Caryologia, 2023 Tetragonopterus is a taxonomically complex genus in Characidae, being currently represented by nine species according to integrative approaches. One of them, T. franciscoensis was recently validated in rivers from northeastern Brazil.
Mauricio Barros Fernandes +4 more
doaj +1 more source
Inpaichthys kerri n. g. n. sp., um novo peixe caracídeo do alto rio Aripuanã, Mato Grosso, Brasil [PDF]
Acta Amazonica, 1977 Resumo É descrito um novo peixe caracídeo (Pisces, Cypriniformes, Characoidei) pertencente a um novo gênero Inpaichthys kerri n.g.n sp., coletado perto da Estação do Núcleo Aripuanã do Instituto Nacional de Pesquisas da Amazônia (INPA), ao Norte de Mato ...
J. Géry, W. J. Junk
doaj +1 more source
Genetics and Molecular Biology, 2002 In the present study, nuclear DNA content was analyzed in 53 species of Characiformes fish from the Neotropical region. Diploid number ranged from 2n = 48 in Astyanax fasciatus, Gymnocorymbus ternetzi and Hyphessobrycon griemi to 2n = 102 in Potamorhina ...
Margarida Lima Carvalho +4 more
doaj +1 more source
Acta Scientiarum: Biological Sciences, 2008 Exemplares de Bryconamericus iheringii (Boulenger, 1887) coletados nos riachos Cambé, Taquari, Água da Floresta e Baroré, localizados na bacia do rio Tibagi, Estado do Paraná, foram analisados para verificar sua dieta.
Maria Carolina Gomiero Oricolli +1 more
doaj +1 more source