Proactively prevent diseases for aquaculture during flood season
Nghe An province currently has more than 2,000 hectares of brackish and salty ponds, mainly concentrated in the communes of Quynh Bang, Quynh Xuan,...
Nghe An province currently has more than 2,000 hectares of brackish and salty water ponds, mainly concentrated in the communes of Quynh Bang, Quynh Xuan, Quynh Thanh, Quynh Lien, Quynh Luong, Quynh Di, Mai Hung, An Hoa of Quynh Luu district and some areas of Nghi Loc, Dien Chau districts and Vinh city. Although the area of brackish and salty water aquaculture is only 1/10 of the freshwater farming area, the economic efficiency is many times higher. On average, shrimp raised in salt water has a yield of 6 to 10 tons/ha. Typically, Mr. Thanh's household (Nghi Quang commune, Nghi Loc) raises 2.2 hectares, with an annual income of more than 1.2 billion VND.
Farmers in Hung Hoa commune surround shrimp ponds with nets to limit
loss due to flood
According to the Nghe An Aquaculture Department, up to this point, shrimp farms in the province have finished harvesting the first crop of shrimp, and some farms have released the second crop of shrimp, with an area of 329 hectares. Due to complicated weather conditions and direct impacts of rain from storms No. 4 and No. 5, some shrimp farming areas have been infected with white spot virus and polluted water sources.
The Department of Aquaculture has directed commercial shrimp farms to check and repair dykes, install overflow pipes, low water discharge, net enclosures, fences, and prepare bamboo stakes and tools to reinforce dykes when bad situations occur. Regularly check water quality: pH, alkalinity, dissolved oxygen... within appropriate thresholds, spread lime around the dykes to prevent alum from flowing down and causing pH fluctuations in the pond; add vitamin C to feed to increase resistance for farmed shrimp.
Areas that have not yet released shrimp can raise some fish such as sea bass, tilapia, goby, etc. to overlap crops and improve the environment for the next shrimp farming season.
Facilities and households that continue to release and raise shrimp need to closely monitor the weather, regulate water levels and water quality, clear bushes around the banks, and limit environmental pollution; feed must ensure quality and quantity, do not overfeed, do not use expired feed, and use some biological products to prevent digestive diseases in shrimp.
When pets show signs of suspected infection, it is necessary to take samples to correctly identify the pathogen for treatment, prevention, isolation and immediately report to veterinary authorities for timely treatment, avoiding widespread spread.
With areas of early release of second crop shrimp that have reached commercial size, it is necessary to harvest promptly to minimize damage caused by storms and floods.
Article and photos: Minh Thong
