India is one among the 12-mega biodiversity countries which harbour
60-70% of the world's recorded biodiversity. With only 2.4% of land
area, India accounts for 7-8% of the recorded species of the world. Out
of approx 31600 fish species recorded worldwide, more than 2463 fish
species are present in Indian water bodies. Mahseer is the common name
for several fresh water fish species of large scaled barbels (genera
Tor, Neolissochilus, and Naziritor in the family Cyprinidae (carps)
found in the Asian subcontinent and inhabits a wide range of Indian
river-systems and has high demand as food and attraction for anglers as
a sport fish. Mahseer are the most famous game fish known for its
fighting spirit. In this monograph, cytogenetic profile of the 5 mahseer
species has presented. Within the framework of research on
macro-evolutionary processes in this species, which has not been
characterized previously among different species and geographically
isolated populations, information derived from simultaneous chromosomal
localization and nucleotide sequences of 45S and 5S ribosomal RNA
presented and discussed to better investigate the presence of discrete
species/population specific marker.