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American adult largemouth laryngopogon adult fish culture
American bigmouth bass, also known as largemouth bass, can be cultured either in dedicated ponds or in mixed-species systems. Due to their fast growth rate and relatively loose scales, it's important to minimize handling during the growing period to avoid injury.
(1) Main Culture System. Ponds ranging from 8/15 hectares are commonly used for raising American bigmouth bass. Each hectare should have proper inlet and outlet systems. Before stocking, the pond must be thoroughly disinfected with quicklime. The primary feeding method combines main feeding with fertilization. For a 1/15-hectare area, it is recommended to stock fish at 50–60 grams per individual, with approximately 600 fish per acre. In polyculture systems, species such as white bream, silver carp, and crucian carp are stocked at around 100 grams, while grass carp are stocked at about 60 grams. Fish should be disinfected using salt or malachite green before being introduced. Artificial compound feed is typically used. During winter, feed amounts are usually 0.5% to 1% of the total fish weight, increasing to 5% to 7% in summer, and 2% to 3% in spring and autumn. Water should be partially replaced every 15 days, with about one-third of the water changed each time. After 12 months of culture, the net yield per hectare can reach approximately 9,000 kg, with around 6,000 kg being bigmouth bass, accounting for about 94% of the total.
Fertilizing the water helps maintain a cool environment. Water should be added 1–2 times a month, and plankton can be cultivated through fertilization. If natural food is insufficient, artificial feed should be supplemented. After 12 months of breeding, the net production per hectare can reach up to 10,800 kg, including about 6,900 kg of bigmouth bass, with a survival rate of approximately 90%.
(2) Polyculture System. In ponds where other fish or freshwater prawns are raised, 450–900 American bigmouth bass can be stocked per hectare without requiring special management. From these systems, it's possible to harvest between 520–1,200 kg of commercial fish per hectare, with each fish weighing between 1.3–1.4 kg. This system not only improves resource utilization but also enhances overall productivity and economic returns.