Chromosome analysis of the sexual phases of the protogynous hermaphrodites Epinephelus guttatus and Thalassoma bifasciatum (Serranidae and Labridae; Teleostei)

ISSN: 00086452
6Citations
Citations of this article
37Readers
Mendeley users who have this article in their library.

Abstract

This study was undertaken to determine if sex chromosomes are present in two species of sequential hermaphrodite fish. The red hind, Epinephelus guttatus, and the bluehead, Thalassoma bifasciatum, are sequential protogynous hermaphrodites common along the southwest coast of Puerto Rico. Their chromosome complement consisted of 48 telocentric chromosomes (2n = 48t). The red hind had 24 chromosome pairs that decreased in length and lacked conspicuous morphological differences. The bluehead had a distinctively short chromosome pair 24. There was no difference in chromosome number or morphology between females, hermaphrodites, or males of the same species. Chromosome bands were not observed; this result was consistently obtained with four differential staining techniques. A test to identify sex chromatin in T. bifasciatum was negative. The results indicate that differentiation of sex chromosomes is absent in both species, and that sex determination occurs at genomic level rather than at chromosome level.

Cite

CITATION STYLE

APA

Ruiz-Carus, R. (2002). Chromosome analysis of the sexual phases of the protogynous hermaphrodites Epinephelus guttatus and Thalassoma bifasciatum (Serranidae and Labridae; Teleostei). Caribbean Journal of Science, 38(1–2), 44–51.

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free