American Redfish Culture Technology

American redfish are native to the Gulf of Mexico in the southern United States. It is a fish of commercial and recreational value. It resembles large yellow croaker but has a reddish color and a black spot on the base of the tail. The fish is delicious, it has less thorns, and is rich in unsaturated and fatty acids, so it is very popular among consumers. China's introduction in 1991, after a small-scale trial of breeding and artificial propagation experiments, proved to be very promising for promotion, and was particularly suitable for pond rearing and cage culture in the southern coastal shrimp ponds.

Habits

Habitat inhabits the estuary waters before sexual maturity, and can normally live within the water temperature of 2-33°C; it grows rapidly at 18°C-30°C. Redfish are widely salty fish and can grow not only in seawater but also after normalization in freshwater.

American redfish is a carnivorous fish. It has a large food intake and a strong feeding capacity. It does not require much food. It uses small fish, shrimp and shellfish as its food. Artificial breeding can feed mixed fish, prawns, and oysters.

The growth of American redfish grows rapidly. Xinlin Port, Lingshui County, Hainan Province introduced 9000 American redfish fry in the winter of 1996. After 10 months of cage culture, the average adult fish weight was 1600 grams per end, and the maximum weight was 2050. Grams, get better economic benefits.

Breeding technology

Redfish can be cultured in cages and cultured in ponds. Here are the techniques for sea cage trials:

Fry with a density of about 2 cm and a feed amount of about 2 cm was cast in a cage with a seedling density of 1000 per cubic meter, and fish and compound feed were fed at this time. The number of feedings is 1-2 times a day, and the daily dosage accounts for 10%-20% of the body weight. After the spring of the coming year, the seedlings will be bred in small quantities. When the fish is grown to 18 cm in length, each cage (3m 3m 3m) can be reared with 300-500 fish species. The fish is fed with fresh fish and artificial feed. The amount of weight 5% -10%.

Feeding and management of redfish have the habit of eating food activities, less food for the sinking of the bottom of the food, it is recommended to feed floating feed or take blue feeding and other measures to achieve a good feeding effect.

Disease Prevention and Control The redfish have not been found to have serious diseases during the breeding process. The most common cause of this disease is the death caused by a large area of ​​the body surface of the cultured fish. This is related to the mechanical damage caused by careless handling. The application of antibiotics and drug foaming can achieve partial therapeutic effects. Enteritis is a common disease in fish culture. Redfish have a large amount of food and can cause enteritis if they are fed with fresh feed or fed too much. Minophora will also cause some damage to redfish.

The cultivation of American redfish can be based on actual conditions, such as the establishment of polyculture of redfish-shellfish, redfish-omnivorous fish and other polyculture modes. Culture density in intensive ponds is controlled between 4000 and 6000 tails per acre.

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