According to Mr. Pham Quoc Dat, Head of Agriculture and Rural Development Department of Tua Chua district, Dien Bien province, from the beginning of May 5 until now, at the fish cage farming area on the bed of Son La Hydropower reservoir, of a household In Huoi So commune, Tua Chua district, Dien Bien province, the phenomenon of fish cultured in cages dying scattered, an average of 2023-10 fish/day, unknown cause. The prolonged situation made people insecure, worried that the disease might cause mass fish deaths, so they reported the situation to the local government and specialized agencies of the district to conduct inspection and confirmation. Identify the cause and find solutions.
The Department of Agriculture and Rural Development of Tua Chua district invited professional staff from the Sub-Department of Livestock, Veterinary and Fisheries, under the Department of Agriculture and Rural Development of Dien Bien province to conduct a physical inspection. Through inspection, based on the results of the water environment index and the actual situation of cage fish farming in the field, the specialized unit concluded that the cause of death of fish was not due to disease but due to changes in weather. Prolonged drought changes water environment factors.
Specifically, the hot and dry weather has lasted from the beginning of April until now, causing the water volume in the lake to be deep, turbid and causing sudden changes in the water environment, causing local lack of oxygen. Dissolved oxygen content in water = 4mg/l, amount of NH3, NH3
Currently, in the area of the Son La hydropower reservoir in Huoi So commune, there are 72 fish cages of 6 local households. In order to minimize damage to cage fish farmers during the changing seasons, the functional unit has recommended that farming households need to be proactive in taking measures to cope with prolonged heat and drought, to ensure the environment. live for cage fish; At the same time, it is necessary to clean the fish cage, remove algae, and garbage around the cage net, clear the water circulation inside and outside the cage so as not to have a local lack of oxygen for the fish in the cage.
