The Southwestern provinces of Vietnam, notably Bac Lieu, are currently grappling with scorching temperatures ranging between 35 – 38°C. With such extreme heat, the temperature difference between day and night becomes stark, posing a significant threat to the health of farmed shrimp. In response to this climatic challenge, the agricultural sector, along with local authorities and shrimp farmers, has mobilized efforts to mitigate the adverse effects and bolster production efficiency.

Vigilance Amid Vulnerability

Shrimp farming stands as a lucrative venture, yet shrimp themselves exhibit poor resistance to environmental fluctuations, particularly to weather changes. As temperatures rise, shrimp farmers employing floating circular ponds or submerged circular ponds lined with canvas must remain vigilant. Continuous monitoring of water levels, maintenance of optimal depths ranging between 1.2 – 1.5 meters, and increased fan operation are crucial strategies to prevent temperature stratification within the ponds and minimize the detrimental impacts of hot weather.

The onset of hot weather instills restlessness among shrimp farming households, prompting regular inspections of ponds and the implementation of anti-heat measures to safeguard shrimp health. In tandem with individual initiatives, local authorities have directed cooperatives and community shrimp farming groups to provide comprehensive guidance to shrimp farmers. These instructions emphasize measures such as raising water levels in ponds, regular usage of water fans – particularly during peak heat hours and nocturnal periods – to enhance dissolved oxygen content and deter the accumulation of toxic gases.

Proactive Measures and Preparedness

Anticipating prolonged heatwaves and unpredictable weather patterns, the Department of Fisheries has issued directives to localities to proactively monitor meteorological developments. Emphasis is placed on meticulous preparation for aquaculture activities, including prudent stocking practices aligned with favorable weather conditions. Furthermore, strict management protocols for farming areas and facilities are enforced, coupled with initiatives such as canal dredging and clearing irrigation works to facilitate water pumping for aquaculture, especially in shrimp farming regions.

To mitigate the risks posed by abnormal weather phenomena, technical staff are deployed directly to farming areas to offer guidance on heat prevention measures and technical care procedures. Recommendations include prudent stocking densities, proper water quality management, and the implementation of comprehensive technical care regimes to bolster shrimp resilience and minimize disease outbreaks.