Management of fish ponds and its relation to fish diseases in West Bengal, India

摘要

Field studies were carried out in 17 districts of West Bengal to find out the incidence and possible causes of fish diseases such as epizootic ulcerative syndrome (EUS), argulosis, gill rot, tail and fin rot, dropsy, fungal diseases and tumours. Studies were conducted for two consecutive years in 145 blocks, covering a total of 1332 impounded water bodies selected at random. The most common disease was EUS which affected 46.02% of ponds, followed by gill-rot (16.25%), tail and fin rot (5.12%) argulosis (2.39%), malnutrition (19.18%), dropsy (8.29%) and fungal diseases (0.28%). Several factors including fluctuation of physico-chemical parameters, drainage of agrochemicals, heavy siltation, and high stocking density and poor management were found toincrease the risk of disease.