Measures to protect shrimp and fish from heat during the summer.
Hot weather causes sudden fluctuations in the water environment for shrimp and fish. This can stimulate the skin's nerves, impairing the regulation of organ function, leading to disease, and potentially causing mass mortality. Here are some tips for protecting shrimp and fish from the sun.
For rice paddy fish farming:
- Ensure sufficient water supply and prevent leakage by compacting the embankment tightly.
- Dig ditches and create depressions in the rice field to provide shelter for fish during prolonged hot days, and also as feeding and harvesting areas. For small fields, dig one depression; for large fields, dig 2-3 depressions in the middle or at the edges of the field. The area of the depressions should occupy 2-3% of the total field area.
- A system of ditches in the shape of a plus sign (+) or rectangles to connect the low-lying areas. The ditches are 0.5m wide and approximately 0.5m deep.
For fish and shrimp ponds and lakes:
- The pond needs to be thoroughly cleaned and dredged, leaving only a moderate amount of mud, and then the bottom should be thoroughly sun-dried before stocking with fish.
- Fertilizers should be properly composted, and the amount applied should be adjusted according to weather conditions and water quality.
- The stocking density of fish and shrimp for rearing, and the density of eggs for incubation, should not be too high to ensure sufficient oxygen in the environment.
- When feeding fish and shrimp, apply the four principles: quality, quantity, timing, and location. If there is leftover food each day, it must be discarded.
- When transporting fish and shrimp, it is necessary to choose weather with suitable temperatures. If the temperature is too high, measures must be taken to lower it during transport. The water temperature difference during transport should not exceed 5°C for large fish and shrimp, and not exceed 4°C for juveniles.
- Regularly monitor environmental changes to pump clean water into the pond; use an aeration machine to promptly supplement oxygen in the nursery pond.
(According to VTC 16) - LY
