CATDOLL : CATDOLL: How to farm sea bass and how long is the farming cycle?

Taking the pond-specific perch breeding technology as an example, the breeding method is as follows: 1. Before stocking the fish, use 75-100kg of quicklime slurry per acre of pond and sprinkle it throughout the pond, and then use 150-250kg of organic fertilizer to fertilize the water. 2. Stock summer flower fish in mid-to-late April each year, with a stocking density of 1000-1500 per acre. 3. In the early stage of breeding, the daily feed amount is about 8-10% of the perch's body weight. As the perch grows, the daily feed amount is adjusted to about 3-5% of the perch's body weight. 4. Add oxygen in time to ensure that the dissolved oxygen content is above 5mg/L.

1. Breeding methods of sea bass

1. Technology for raising perch in ponds

(1) Pond treatment

① The pond should not leak, have less silt on the bottom, have sufficient water source and fresh water quality, and high dissolved oxygen content.

② The breeding area should be 2-3 mu, and the water level should be about 1.5-2m deep.

③ Before stocking fish, use 75-100kg of quicklime slurry per acre of pond and spray it throughout the pond to clean and disinfect it.

④ After the pond is cleaned, apply 150-250kg of organic fertilizer per acre of pond to fertilize the water, accelerate the reproduction of plankton, and provide natural bait for the stocked fish.

(2) Free-range

① California bass are generally released in mid-to-late April each year when the water temperature reaches above 18°C.

② The fish species to be released should preferably be the summer flower fish species bred and cultivated in the same year, with a body length of about 4-5cm. At the same time, the size difference between the fish species should not be too large, otherwise it is easy for big fish to eat small fish.

③ In general, 1,000 to 1,500 sea bass fry are stocked per acre of pond, and appropriate amounts of carp, silver carp, bighead carp, crucian carp, and tilapia are stocked at the same time (to help improve and stabilize water quality). If there is sufficient feed and the pond water quality is good, the stocking density can be appropriately increased.

(3) Feeding

① California bass can be fed with animal baits such as river clams, snail meat, earthworms, loaches, small fish, shrimps, fresh poultry and livestock offal, as well as artificial compound feeds. However, the protein content of artificial compound feeds is required to be above 35%, and when feeding, it needs to be processed into a lumpy sticky feed.

② In the early stage of breeding, choose to feed silver carp, carp and other domestic fish fry, as well as fish paste, earthworms, blood worms and other baits. The daily feeding amount is about 8-10% of the body weight of the sea bass, divided into three feedings a day, namely in the morning, afternoon and evening.

③ As the sea bass continues to grow, the amount of feed needs to be increased, and artificial compound feed or fresh animal feed (such as miscellaneous fish, snail and clam meat, poultry and livestock offal, etc.) should be gradually switched to. The daily feeding amount is about 3-5% of the sea bass's body weight, and it is divided into two feedings a day, from 8:30 to 9:00 in the morning and from 4:00 to 5:00 in the afternoon.

④ There are mainly the following types of artificial compound feeds: the first type is eel feed. The second type is minced fish into meat paste and mixed with an appropriate amount of peanut bran and corn flour. The third type is a mixed feed prepared in the proportion of 60% fish meal, No. 4 flour and 40% yeast powder.

⑤ Adjust the feeding amount every 7 or 15 days according to the eating habits of the sea bass and weather conditions.

(4) Management

① Due to the high stocking density, it is necessary to regularly inspect the pond during the breeding process to observe whether there is hypoxia. If there is, turn on the aerator in time to increase oxygen to ensure that the dissolved oxygen content in the water is above 5mg/L.

② After 2 months of breeding, separate ponds can be used for breeding, which can effectively improve the survival rate and yield of sea bass.

③The water transparency should be maintained at around 20-30cm.

④ Anti-escape nets need to be set up at the water inlet and outlet of the pond to prevent the perch from escaping.

2. Cage culture technology of seabass

(1) Selection of aquaculture waters

Requirements for aquaculture waters: sheltered from the wind and facing the sun, good lighting conditions, wide water surface, water level not less than 2.5m, dissolved oxygen content in the water above 5mg/L, unpolluted water quality, and quiet surrounding environment.

(2) Cage specifications

① If it is sea bass fingerling farming, the mesh size of the cage should be about 0.8-1.2cm. If it is sea bass adult farming, the mesh size of the cage should be about 2-3cm. The area of ​​the cage should be 8-20 square meters.

② The net box is a floating frame type, using bricks, stones and other objects to give the net a fixed shape.

③ Use bamboo to make a fence, and arrange the cages in a herringbone shape, with the interval between two rows being about 1-2m, and the distance between cages being about 0.6-1m.

(3) Free-range

① Before stocking fish, soak the cages in water for 10-15 days.

② Select fish species with no damage on the surface, strong physique and basically the same size for stocking.

③ If you are stocking summer flower fish, stock 300-500 per square meter. If you are stocking one-year-old fish, stock 15-20 per square meter.

(4) Feeding

① If it is summer flower fish, the daily feeding amount is about 8-10% of the weight of the sea bass. If it is one-year-old fish, the daily feeding amount is about 3-5% of the weight of the sea bass.

② If it is summer flower fish, feed it three times a day, in the morning, noon and evening. If it is adult fish, feed it twice a day, from 8 to 9 in the morning and from 3 to 4 in the afternoon.

(5) Management

① Check the bait residue in the cage in time and adjust the daily feeding amount of sea bass accordingly.

② Remove the dead fish from the net cage in time.

③ Check the damage of the net cage and clean the debris attached to the net cage regularly.

④ Check the water level fluctuations in the aquaculture waters in a timely manner and adjust the cages in a timely manner.

⑤ When the sea bass weighs 400g per tail, it is caught and sold on the market.

⑥ If the seabass has not yet reached the market size, it can continue to be raised, but the maximum size of the seabass should be kept below 650g per fish.

2. How long is the sea bass breeding cycle?

1. The breeding cycle of sea bass is about 6 months.

2. In the process of sea bass breeding, in order to avoid the situation that big fish eat small fish, it is necessary to carry out graded breeding. In the early stage of sea bass breeding, generally use a 5-point sieve to screen and grade once every 7-10 days. In the middle stage of breeding, use a 7-point sieve to screen and grade once every 10-15 days, and transfer the sea bass to the No. 6 cage for breeding. From the end of June to the beginning of July, use a 9-point sieve to screen and grade once, and transfer the sea bass to the No. 8 cage for breeding for about 15 days. Finally, use a 1.3-inch sieve to screen and grade once, and put it into the No. 10 cage for adult fish breeding.