Natural occurrence of monoploids and polyploids in the Indian catfish, Heteropneustes fossilis

Abstract

Natural occurrence of male and female haploid, triploid and tetraploid Heteropneustes fossilis is reported for the first time. Karyotypic and nuclear volumetric evidences are described to confirm the haploid, triploid and tetraploid nature of the identified individuals. Studies on spermatogenesis also confirm the observed unusual ploidies in these individuals.