45 research outputs found
Intra- and inter-individual chromosome variation in Hoplerythrinus unitaeniatus (Pisces, Erythrinidae): a population from the Brazilian SĂŁo Francisco river basin
Cytogenetic analysis of the 18S, 5S rDNA and B chromosome of Iheringichthys labrosus (LĂŒtken, 1874) (Siluriformes, Pimelodidae)
EficĂĄcia das vacinas comercialmente disponĂveis contra a infecção pelo papilomavĂrus em mulheres: revisĂŁo sistemĂĄtica e metanĂĄlise
Chromosomal evidence of population subdivision in the freshwater fish Leporinus elongatus in the Upper ParanĂĄ River basin
Evolutionary cytogenetics of the Hoplias lacerdae, Miranda Ribeiro, 1908 group: a particular pathway concerning the other Erythrinidae fish
Karyotypic diversity between allopatric populations of the group Hoplias malabaricus (Characiformes: Erythrinidae): evolutionary and biogeographic considerations
Challenges for conducting blood collection and biochemical analysis in a large multicenter school-based study with adolescents: lessons from ERICA in Brazil
Occurrence of B chromosomes in Cyphocharax modestus (Fern\ue1ndez-Y\ue9pez, 1948) and Steindachnerina insculpta (Fern\ue1ndez-Y\ue9pez, 1948)(Characiformes, Curimatidae) from the Tibagi River basin (Paran\ue1 State, Brazil)
Differential chromosomal markers between sympatric karyomorphs of the fish Hoplias malabaricus (Bloch, 1794) (Characiformes: Erythrinidae)
Cytogenetic analyses were performed on Hoplias malabaricus (Bloch, 1794) from the Taquari River, Parana River drainage, revealing two sympatric karyomorphs. One karyomorph was characterized by 2n = 40 m/sm and 2n = 39 m/sm chromosomes for females and males, respectively, and an X1X1X2X2/X1X2Y sex chromosome system. In the second karyomorph, specimens showed 2n = 42 m/sm chromosomes, without sex-related heteromorphism. Both karyomorphs were characterized by a distribution of heterochromatin in the pericentromeric and telomeric regions. In addition to the differences in the diploid numbers and the sex chromosomes, the GC-rich sites and the nucleolar organizer regions also showed clear differences between the karyomorphs. Coupled with the occurrence of unique chromosomal features within each karyomorph, the fact that hybrids have not been identified in the sampled population provides additional support of the existence of a species complex in H. malabaricus