CATDOLL : CATDOLL: White shrimp farming technology and management, how long is the farming cycle

1. White shrimp must be cultured in a place with sufficient water, good water quality, no pollution, and good bottom quality, which is conducive to reducing diseases. 2. 15-30 days before stocking, add 20-30cm of water, use 1ppm of shrimp and fish net to water and sprinkle it all over the pond. 3. High-quality shrimp fry must be selected for stocking, that is, shrimp fry with a body length of more than 0.8cm, wall-attaching behavior, fat body, complete body shape, and no damage or deformity.

1. White shrimp farming technology and management

1. Breeding technology

(1) The natural habitat of white shrimp is muddy seabed, with a suitable water depth of 1-72 meters, water temperature of 22-32°C, salinity of 10-25%, pH of 0.3-0.8, dissolved oxygen greater than 4mg/L, transparency of 0.3-0.5 meters, and water color of green or reddish brown. When breeding, you must choose an area with sufficient water source, good water quality, no pollution, and good bottom quality, which is conducive to reducing growth diseases. The width of the pond embankment cannot be less than 2 meters, and there must be a feeding platform along the pond embankment. The pond depth is about 1.5 meters. The area of ​​the shrimp pond should be 5-10 mu, generally not more than 20 mu, and the shape can be rectangular or circular, and the pond embankment should be well protected.

(2) The purpose of pond cleaning is to kill harmful organisms, such as pathogens of fish and shrimp. 15-30 days before stocking, add 20-30cm of water, and use 1ppm of shrimp and fish remover to spray the whole pond. One day later, use 0.5kg of dibromohydantoin (granular type) per mu to spray the whole pond, and then seal the pond for 2-3 days. For newly built shrimp ponds, they should be soaked and rinsed 2-3 times in water and then disinfected. For shrimp ponds that have been renovated from old ponds or fish ponds, they should be dried and exposed to the sun, and the silt and weeds should be cleaned before disinfection.

(3) When selecting shrimp fry, you must pay attention to the quality. You must select high-quality shrimp fry for stocking. High-quality shrimp fry have the characteristics of being more than 0.8 cm long, having the ability to attach to the wall, being fat and strong, having a complete body shape, without damage or deformity, having uniform group development specifications, having full and transparent muscles, having normal pigments in the appendages, having a full stomach and intestines, and being flexible in jumping. In addition, high-quality shrimp fry have a straight body when swimming, are sensitive to water flow stimulation, have a strong ability to swim against the current, and have no dirt on their body surface.

(4) When stocking shrimp fry, the density can be determined based on factors such as pond water depth, water exchange conditions, aeration facilities, culture methods, seedling size, feed supply, culture output and specifications, equipment and management experience. The general stocking density is 20,000 to 50,000 shrimp/mu. When the water depth does not reach 1.2m, the stocking density should be less than 8,000 shrimp/mu; when the water depth is 1.3-1.5m, the stocking density is 12,000 to 15,000 shrimp/mu; when the water depth is more than 1.5m, the stocking density is 15,000 to 20,000 shrimp/mu.

2. Breeding management

(1) No water change is required in the early and middle stages of aquaculture. In the early stages of aquaculture, add a small amount of water every day by 3-5 cm until the water level reaches 1.6 m and the water level remains unchanged. In the middle and late stages of aquaculture, water can be changed in appropriate amounts according to the transparency and changes in algae phases. The water can be changed less and more slowly, and the water level can be slowly added to the previous level. The daily water change volume must be controlled at 5-10 cm, and 0.2 ppm of dibromocyanine should be used every 10-15 days to prevent progressive diseases.

(2) Within 30 days after stocking, the pond water is rich in basic feed, so feeding is generally done twice a day. After 30-60 days, feeding can be done 3-4 times a day. When the shrimps are over 8g in the later stage, the daily feeding can be increased and should be dispersed to increase to 5 times. The daily feeding amount of white shrimp is calculated as a percentage of its body weight. Generally, before the body weight reaches 10g, the feed accounts for 6.4% of the body weight, when the body weight reaches 10-15g, the feed accounts for 4.6% of the body weight, and when the body weight reaches 20g, the feed accounts for 3.2% of the body weight.

(3) When feeding, you must pay attention to feeding in small amounts and at frequent intervals, that is, follow the principle of "feeding in small amounts and at frequent intervals, feeding less during the day and more at night, feeding evenly at the head and tail, mixing them reasonably, using them alternately, and feeding coarse first and fine later". After 75-95 days of culture, white shrimp can be harvested when the average weight is 50-60 per kg. There are three main methods of harvesting shrimp: collecting shrimp with a conical net, collecting shrimp with a shrimp cage, and collecting shrimp with electricity.

2. How long is the white shrimp farming cycle?

1. The breeding cycle of white shrimp is generally about 4-10 months. The faster growing shrimp can be put on the market in more than 3 months. Their growth cycle is related to the seedlings, stocking density, weather, daily management and disease prevention. Generally, when the growth rate is fast, 80 shrimps/catties can be grown in 80 days, and when the growth rate is slow, about 30 shrimps/catties can be grown in 100 days.

2. When breeding white shrimp, please note that the water color suitable for their growth is yellow-green or similar colors formed by green algae or diatoms. The conventional control method is to apply phosphorus fertilizer and ammonia fertilizer in the pond water in proportion. In the middle and late stages of breeding, due to the increase of residual bait and shrimp excrement, the water color gradually becomes darker. At this time, it is necessary to change the water in an appropriate amount, inject water or apply a certain amount of zeolite powder or quicklime to control the water color.

3. Practice has proved that in ponds with less plankton, white shrimps will get sick earlier, and may get sick when they are only 5cm long. Generally, after 3 days of pond disinfection, you can mix 1kg/mu of active microecological agent in sand and sprinkle it on the bottom of the pond, then add water. When fertilizing the water, you can use a bottom coolant to spray the whole pond, which can effectively maintain the ecological balance of the shrimp pond.