Karyology of the Indo-Pacific Parioglossus raoi (Herre) (Teleosstei : Gobioidei) from Fiji

Abstract

The diploid number of chromosomes from gills, spleen and gonads of Fijian specimens of P. raoi was 46, 23 bivalents being observed during the meiotic division in spermatocytes. The karyotype comprised 23 pairs of telocentric chromosomes, giving an arm number of 46. There was no evidence for morphologically identifiable sex chromosomes. Comparisons with other gobioids indicate that the karyotype of P. raoi is superficially similar to those of a number of taxonomically diverse members of the suborder and bears no special resemblance to species from a similar ecotope.