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Marine Biology

, Volume 112, Issue 1, pp 37–41 | Cite as

Karyotype analyses reveal inter-individual polymorphism and association of nucleolus-organizer-carrying chromosomes in Capros aper (Pisces: Zeiformes)

  • R. Vitturi
  • F. Lafargue
Article

Abstract

Three different karyomorphs with 2n=46, 2n=44 and 2n=42 for Capros aper (L., 1758) (Zeiformes) collected from the Gulf of Lion, near Banyuls-sur-Mer, France, in July 1990 were determined. Karyomorphs were characterized by the same arm number [Fundamental number (FN)=50], suggesting that chromosome variations are due to Robertsonian fusions. In somatic metaphase spreads stained with silver nitrate, nucleolus organizer regions (NORs) consistently occupied a terminal position on the short arms of two small submetacentric chromosomes. Ca. 30% of silver-stained metaphases in each specimen showed NOR chromosomes associated in pairs by their nucleolus organizer regions.

Keywords

Nitrate Silver Nitrate Organizer Region Karyotype Analysis Nucleolus Organizer Region 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1992

Authors and Affiliations

  • R. Vitturi
    • 1
  • F. Lafargue
    • 2
  1. 1.Institute of ZoologyUniversity of PalermoPalermoItaly
  2. 2.Observatoire Oceanologique de Banyuls, Laboratoire AragoUniversité P. et M. Curie (Paris VI), CNRS UA 117Banyuls-sur-MerFrance

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