Cytotaxonomic Studies in Iberian Cyprinids I. Karyology of Chondrostoma lusitankum Collares-Pereira, 1980

Abstract

The karyotype of Chondrostoma lusitanicum Collares-Pereira, 1980 is established by the analysis of 246 kidney methaphasic plates obtained in 33 specimens. This Iberian endemic species is characterized by presenting the most common diploid number found in the known Cyprinids, that is, 2n=50 (NF=94). The karyotype is asymmetric and its haploid formula is 8: 14: 3. There is no evidence neither of intra and/or inter-individual polymorphism, nor of heterochromosomes, just like in the described holartic Cyprinids. Morphometric data concerning the six more conspicuous chromosome pairs are presented and discussed. © 1983, Japan Mendel Society, International Society of Cytology. All rights reserved.