Vol. 10, Special Issue 5 (2021)

Author(s):
Abhijit Deka, Arpita Bharali and Nagendra Nath Barman

Abstract:
Assam is very rich in the biodiversity, which helps in the accommodation of a large verities of species in this area. The large geographical area covered by the wetlands also enhance the opportunities for the aquatic habitat. With the increasing agricultural practices, pisciculture is becoming a popular practice for livelihood. The constant finding of gross lesions in the body of fishes decrease the economical values, leading to loss to the farmers. In this we tried to find out the varies types of lesion in the body of fishes and the practices tried by the farmers to prevent the diseases. It is found that around 17 numbers of fish species were affected from 46 disease incidences in 16 numbers of districts of different regions of India. The gross lesion observed were pale white gills, red spots on the body, brownish discoloration of the skin, haemorrhage, swollen abdomen, degenerated fin and tail and ulcerative lesion. In microscopic examination we found congestion, haemorrhage and degenerative changes, necrosis in different organs of the body. Also, there was evident glomerulonephritis and depletion of lymphoid tissue.