Conventional karyotype and nucleolar organizer regions of the toadfish <i>Halobatrachus didactylus</i> (Schneider, 1801) (Pisces: Batrachoididae)

J. L. Palazón; M. Nirchio; C. Sarasquete

doi:10.3989/scimar.2003.67n4445

Conventional karyotype and nucleolar organizer regions of the toadfish Halobatrachus didactylus (Schneider, 1801) (Pisces: Batrachoididae)

Authors

J. L. Palazón Escuela de Ciencias Aplicadas del Mar, Universidad de Oriente - Instituto de Ciencias Marinas de Andalucía (CSIC)
M. Nirchio Escuela de Ciencias Aplicadas del Mar, Universidad de Oriente
C. Sarasquete Instituto de Ciencias Marinas de Andalucía (CSIC)

DOI:

https://doi.org/10.3989/scimar.2003.67n4445

Keywords:

karyotype, NOR, cytogenetic, toadfish, Halobatrachus didactylus

Abstract

For this report, we studied the conventional karyotype and the NOR-bearing chromosomes in the toadfish Halobatrachus didactylus. We found a karyotype of 46 chromosomes made up of 8 metacentric, 12 submetacentric, and 26 acrocentric elements (FN = 66). No heteromorphic sex chromosomes were observed in the species. Metacentric chromosomes were easily classified as homologous pairs according to their morphology and L/S ratio. The rest of the chromosomes could not be accurately classified as homologous pairs because differences in chromosome size and L/S ratio were too slight between adjacent pairs within a size-ranged series. A single pair of NOR-bearing chromosomes was found. Active NORs were terminally located in a submetacentric pair of chromosomes.

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Published

2003-12-30

How to Cite

Palazón JL, Nirchio M, Sarasquete C. Conventional karyotype and nucleolar organizer regions of the toadfish Halobatrachus didactylus (Schneider, 1801) (Pisces: Batrachoididae). Sci. mar. [Internet]. 2003Dec.30 [cited 2025May1];67(4):445-9. Available from: https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/507

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Issue

Vol. 67 No. 4 (2003)

Section

Articles

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