I. Pond Culture
When it comes to pond culture, the main ponds should not be too small. A typical size ranges from 0.33 to 1 hectare per pond. The primary species raised is the paddlefish, often accompanied by grass carp, silver carp, and bighead carp. The stocking size for carp is around 25 centimeters, with a density of 3,000 to 3,750 fish per hectare. Mixed fish are stocked at a lower density, about 2,250 per hectare, and they are generally smaller in size compared to the main species. The management and husbandry techniques are similar to those used for other fish like *A. cerevisiae*, so you can refer to those practices for guidance.
II. Pond Requirements for Catfish Farming
The pond requirements are similar to the above, but instead of the main fish, catfish are the focus of breeding. This method is commonly used for raising farmed fish, although it can also be applied for breeding adult fish. Typically, 150 to 300 fish per hectare, with a stocking size of 15 to 20 cm, are raised. After about 10 months of feeding, the fish can reach a weight of over 1 kg.
III. Cage Culture
Cage culture is another effective method. The standard cage size is 5 meters by 5 meters by 2 meters. Each cage can hold 20 to 30 fish, each measuring around 15 cm in length. Fish are fed with complete artificial compound feed twice daily, with the daily feeding rate being approximately 2% of their body weight. With this feeding schedule, the fish can reach a weight of 1 kg within a reasonable time. Other feeding and management practices are similar to those used in other cage culture systems.
IV. Stocking in Lakes and Reservoirs
For large water bodies such as lakes and reservoirs with good water quality and abundant natural bait, stocking eel or similar species is highly recommended. This approach not only reduces feed costs but also promotes faster growth. Generally, 150 to 225 eels per hectare, with a stocking size of 15 cm, are introduced without the need for additional feeding. By the end of the year, they can grow to more than 0.75 kg. In favorable conditions, where food is plentiful, some individuals may even exceed 1 kg in weight. However, it's crucial to implement proper measures to prevent fish from escaping or migrating.
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