Analysis of Key Technical Points for Overwintering Juvenile Freshwater Pompano

    The pompano is a freshwater fish species introduced to China for farming in the last century. Its flesh is excellent, it grows extremely fast, it is suitable for extensive culture, and it is easy to manage. Combined with strong market demand, it is deeply loved by consumers and farmers alike. However, it is a warm-water fish and needs to grow in water at 15-30 degrees. Once the water temperature drops below 12 degrees, it will freeze to death, especially the fry. Therefore, winter management is extremely important during farming. So how do pompano fry overwinter? Let's take a look.

1. Methods for Cultivating Pompano Fry

1. The fry cultivation pond for freshwater pompano requires an area of 1000-1500m', a depth of 1.5-1.8m, a flat pond bottom, and a small amount of silt. Carry out thorough pond clearing 7 days before the fry are stocked. Choose clear, fine weather for stocking the fry, and note that the water temperature difference between the old and new environments must not exceed 3C; it is best to keep them consistent. In production, clear water stocking is usually adopted, and the operation must be careful, gentle, and quick. The stocking density is 150~200 per m.

3. Within the three days after the fry are placed alone, they must be carefully tended. Sprinkle more egg yolk slurry and soybean milk. Later, as the plankton in the pond increases, only soybean milk may be fed, and in the later stage add soybean cake paste.

4. Throughout the fry cultivation period, water must be added in batches so that the water level rises from 0.6m at stocking to 1.2m. When adding water, prevent harmful organisms from entering the pond with the water. Combine water addition with fertilization to keep plenty of plankton in the water for the fry to feed on while preventing water quality from deteriorating.

5. After about 20 days of cultivation, when the fry reach a size of 2.5~3.0cm, they must be exercised by netting. Usually 2 rounds of netting exercise are sufficient; if long-distance transport is required, then 3 rounds are needed.

2. Methods for Overwintering and Preserving Pompano BroodstockMethods

1. Any water area with good water quality and suitable water temperature can be used for overwintering freshwater pompano fingerlings, such as waste heat water from power plants, underground hot spring water, and glass greenhouses in the south.

2. In the low-temperature broodstock preservation type, the water temperature is kept at 18~23C. The fish basically do not grow, and there is a certain inhibitory effect on future growth performance.

3. In the suitable-temperature cultivation type, the water temperature is kept at 24~32C, and the fish feed and grow normally.

3. Precautions for Overwintering Pompano

1. When the outside water temperature is about 20C, move the fish into the overwintering pond; the water temperature difference between the old and new ponds must not exceed 2C.

2. Determine the size and stocking density of overwintering freshwater pompano fingerlings according to the overwintering form and the required pond-exit size.

3. Before entering the overwintering pond, soak with 0.2g/m2 methylene blue for 10~15 minutes. After entering the pond, splash the whole pond with a mixture of copper sulfate and ferrous sulfate for 2~3 days.

4. Throughout the overwintering period, pay attention to regulating water temperature and water quality, and feed the feed on time.

Alright, the above is the pompano fry overwintering technology brought to you by the Tuliu website editors. We hope it will be helpful after reading. Friends who like it are welcome to follow Tuliu website. We have more farming technology to share waiting for you to discover.