After hatching, Aberdeen (a type of fish) still has its yolk sac partially absorbed and the protective tape not yet removed. It's important to keep them in the hatchery for at least one day before moving them. Rushing the process can lead to stress, injury, or even death. Once they have been feeding normally for three days, they will be more adaptable to the external environment and ready for cultivation. There are two main methods for raising them:
First, using a cement pool. Each pool should be around 8-10 square meters with a depth of 1 meter and a water level of 0.3 meters. The bottom should be covered with 2-3 cm of fine sand, sloped slightly toward the drain for easy cleaning. Before stocking, the pools must be disinfected twice with quicklime or potassium permanganate. A density of 70 fish per square meter is recommended, with each fish weighing between 3-5 grams. Feed them twice daily—once at 7:00 AM and again at 7:00 PM—with food amounting to 10% of their body weight. The feed should include 5% fish oil, along with milk powder, vitamin C, and E, all mixed with water. After six hours, remove any leftover food from the feeding tray and maintain clean water. Disinfect the pool every 7-10 days using lime or bleach to prevent disease. To help regulate temperature and improve water quality, place nylon shade nets and aquatic plants like water peanuts or fake narcissus in the pool. After about 30 days, the fish will reach 10-15 grams and can be transferred to an earthen pond for further growth. With a survival rate of approximately 95%, they grow quickly and most will reach over 500 grams by the end of the year, becoming market-ready.
The second method involves earthen ponds. These should not be too large, ideally around 5 acres. After cleaning and disinfection, a small area of 200 square meters should be enclosed in one corner using bamboo poles. Stocking density here is usually 30-50 fish per square meter. The feeding and management practices are similar to those used in cement pools. Since the young fish are more adaptable to natural conditions, they tend to grow faster with lower stocking densities. However, it's crucial to protect them from predators like water snakes and rats. To do this, first, clear weeds around the pond and sprinkle lime along the edges to deter rodents. Second, install electric fences around the pond and power them in the evening to prevent intrusions. Always ensure that the electricity is safe and properly insulated to avoid accidents.
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