et al., K. (2025). Incidence of Fish Disease in Biswanath District of Assam. Egyptian Journal of Aquatic Biology and Fisheries, 29(4), 241-262. doi: 10.21608/ejabf.2025.437794
Kalita et al.. "Incidence of Fish Disease in Biswanath District of Assam". Egyptian Journal of Aquatic Biology and Fisheries, 29, 4, 2025, 241-262. doi: 10.21608/ejabf.2025.437794
et al., K. (2025). 'Incidence of Fish Disease in Biswanath District of Assam', Egyptian Journal of Aquatic Biology and Fisheries, 29(4), pp. 241-262. doi: 10.21608/ejabf.2025.437794
et al., K. Incidence of Fish Disease in Biswanath District of Assam. Egyptian Journal of Aquatic Biology and Fisheries, 2025; 29(4): 241-262. doi: 10.21608/ejabf.2025.437794
Incidence of Fish Disease in Biswanath District of Assam
Assam, a state in Northeast India, is rich in aquatic resources. In 2019–20, it ranked 12th in overall fish production and 7th in inland fish production in the country. As is common in aquaculture, disease outbreaks caused by pathogenic agents are frequently observed. Periodic monitoring of fish farms in the Biswanath District of Assam revealed that parasitic, bacterial, and fungal infections are prevalent. The most commonly observed diseases include parasitic infections, eye disease, fin rot, tail rot, dropsy, and epizootic ulcerative syndrome (EUS). Among these, argulosis was the most frequently reported, followed by EUS. Non-infectious diseases in fish are often caused by deficiencies and various environmental factors. Key water quality parameters—such as temperature, dissolved oxygen, pH, ammonia, nitrite, hydrogen sulfide, and heavy metals—play a crucial role in maintaining fish health, particularly in intensive and semi-intensive aquaculture systems. During the study period, the order Cypriniformes was the most affected by pathogens (49.09%), followed by Perciformes (27%), Siluriformes (13%), and Anabantiformes (10.91%). Disease outbreaks were most frequently observed shortly after stocking, during the post-rainy season, and throughout the winter. To manage disease outbreaks, the most common strategy employed by farmers was the removal of diseased fish from ponds. The use of chemical treatments was the second most common approach.
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