DILIP KUMAR., B. i. Sc.2019-07-052019-07-052011http://krishikosh.egranth.ac.in/handle/1/5810112173The global biodiversity is being lost at an alarming rate and most part of the biodiversity remained unknown because the conventional morphological methods of cataloguing species are long, laborious and needs high level of expertise. However, cataloguing of all life forms becomes an important requirement in biodiversity studies where in taxonomy plays an important role. Conventional taxonomic classification of fishes is generally based on the morphometric characteristics, but often these characters fail to distinguish closely related species as well as eggs, larvae and young ones of a species. Hence, there is a need to use additional techniques which helps to distinguish the cryptic species. DNA barcoding is one such technique which helps to differentiate the fish species based on the DNA sequenceThesis