Inheritance of trunk banding in the tetra (Gymnocorymbus ternetzi Characidae).

Microtubule dynamics in fish melanophores

We have studied the dynamics of microtubules in black tetra (Gymnocorymbus ternetzi) melanophores to test the possible correlation of microtubule stability and intracellular particle transport. X-rhodamine-or caged fluorescein-conjugated tubulin were microinjected and visualized by fluorescence digital imaging using a cooled charge coupled device and videomicroscopy. Microtubule dynamics were e...

Inheritance of Shoulder Spotting in the Tetra, Hyphessobrycon bentosi Characidae

The tetra (Hyphessobrycon bentosi) exhibits two phenotypes associated with shoulder spotting. Fish possess either a prominent black vertical spot located directly behind the operculum (H. b. bentosi, bentosi white tip tetra) or lack this spot (H. b. rosaceus, rosy tetra). Segregation patterns observed from the progenies of ten different crosses suggest that the inheritance of these phenotypes i...

Diversity of Nematodes of Red-tail-lambari Astyanax Aff. Paranae (teleostei: Characidae) from Polluted Sites of a Tropical River System Diversidad De Los Nematodos De Tetra Cola Roja Astyanax Aff. Paranae (teleostei: Characidae) De Sitios Contaminados De Un Sistema De Río Tropical

Evidence of the differentiated structural arrangement of constitutive heterochromatin between two populations of Astyanax scabripinnis (Pisces, Characidae)

The composition of heterochromatin classes along the chromosomes of specimens from two populations of the fish Astyanax scabripinnis was examined using fluorescence banding with GCand AT-DNA specific fluorochromes and fluorescence in situ hybridization (FISH) with an AT-rich satellite DNA (As51) probe. For the pericentromeric heterochromatin blocks neither GC/AT-DNA specific fluorochromes nor t...

Karyotypic characterization of two species of the genus Serrapinnus (Characiformes, Characidae), with the description of a structural polymorphism in S. heterodon

The family Characidae, one of the largest and more diversified fish families in the Neotropical region, is certainly not a monophyletic group, which is supported by the cytogenetic data showing its extensive chromosome variability. In this work, two species of the genus Serrapinnus, S. heterodon and S. piaba, from the São Francisco river basin were analyzed. Both species presented the same dipl...