The chromosomal complement of the artedidraconid fish Histiodraco velifer (Perciformes: Notothenioidei) from Terra Nova Bay, Ross Sea

• Published in: Cytogenetic and Genome Research
• Main Authors: Caputo, V., Splendiani, A., Nisi Cerioni, P., Olmo, E.
• Format: Article in Journal/Newspaper
• Language: English
• Published: S. Karger AG 2003
• Subjects: Ross Sea; Terra Nova Bay; Antarc*; Antarctica; antartic*
• Online Access: http://dx.doi.org/10.1159/000073414; https://www.karger.com/Article/Pdf/73414

The karyotype of Histiodraco velifer from the Antartic Ocean was analyzed using various banding methods and in situ hybridization with a telomeric probe. A male and a female had a diploid set of 46 chromosomes (6 submetacentric + 40 acrocentric, FN = 52); the nucleolar organizer was CMA 3 -positive and was located on the short arm of a medium-sized submetacentric pair. All chromosomes stained uniformly with DAPI, whereas C-banding revealed heterochromatic blocks that were mostly located centromerically and telomerically and were resistant to Alu I digestion. The substantial identity of the karyotype of H. velifer with that of the other artedidraconids investigated so far suggests that chromosome changes must have played a less than significant role in the speciation among the lineages of this fish family endemic to Antarctica.