Chromosomal distribution of nucleolus organizer regions in six species of Rhodeinae (Cyprinidae, Pisces).

Pebble nest microhabitats of Semotilus species (Pisces: Cyprinidae)

The pebble nest microhabitats of four species of Semotilus were compared. Pit/mound nests of Semotilus corporalis were significantly larger than the pit/ridge nests of Semotilus atromaculatus, Semotilus lumbee, and Semotilus thoreauianus. Nests of S. corporalis were in wider and deeper streams. Pits of S. lumbee nests were longest of the four species; those of S. corporalis were widest and deep...

Occurrence of multiple nucleolus organizer regions and intraspecific karyotype variation in Scaptotrigona xanthotricha Moure (Hymenoptera, Meliponini).

Scaptotrigona xanthotricha has a wide geographic distribution in the Brazilian Atlantic rainforest. One population from southeast and two from northeast Brazil were analyzed and were found to have chromosome polymorphisms. Although the chromosome number 2n = 34 is conserved in this species, karyotypic analysis revealed clear differences between the three populations. Congruent and ubiquitous mu...

Ribosomal Rna in the Nucleolus Organizer

Short communication: Chromosome description and localization of Nucleolus Organizing Regions (NORs) by Ag-staining Technique in Alburnus filippii (Cyprinidae, Cypriniformes) in Anzali Lagoon, North of Iran

Short communication: Chromosome description and localization of Nucleolus Organizing Regions (NORs) by Ag-staining Technique in Alburnus filippii (Cyprinidae, Cypriniformes) in Anzali Lagoon, North of Iran