CATDOLL : CATDOLL: How to raise shrimp in freshwater, the difference between shrimp and shrimp

1. Pond conditions: Select a place with open terrain and convenient drainage as the breeding site, leave 50 cm of water before stocking, and use 110 kg/mu of quicklime and 32 kg/mu of tea meal to clean the pond. 2. Stocking of shrimp fry: The shrimp fry needs to be desalinated before being released, and stocked in the evening or on a sunny day. 3. Farming management: Feeding should follow the principle of "regular quantity, fixed point and fixed quality, small amount and more feeding, and specific adjustment"; add 50ppm raw salt to the pond before stocking, and then add raw salt as appropriate; for diseases, there should be a breeding awareness of "prevention is better than cure" during the breeding process, so as to prevent them before they happen.

1. How to raise shrimp in freshwater

In freshwater shrimp farming, you can farm Penaeus vannamei, but the density cannot be too high. The farming methods for Penaeus vannamei in freshwater are generally as follows:

1. Pond conditions

Select a place with open terrain and convenient drainage as the breeding site, with an area of ​​about 2-3 mu, muddy sand bottom, and a water depth of about 2 meters. Use a 60-mesh silk sieve to filter the water inlet, and use iron wire to block the water inlet and outlet. Leave 50 cm of water before stocking, use 110 kg/mu of quicklime and 32 kg/mu of tea meal to clean the pond, and install a 1.5 kW impeller aerator.

2. Shrimp fry stocking

Before the shrimp seedlings are released, they need to be desalinated. It is best to go to the nursery a few days before purchasing the shrimp seedlings to observe their desalination conditions so as to purchase safe seedlings. When the shrimp seedlings grow to 2 cm, they can be released into the breeding pond. The aerator should be turned on to increase oxygen the day before stocking, and a small amount of water should be added to test the water before a large number of seedlings are released into the pond. The water temperature for stocking shrimps should be above 20℃, and stocking can be done in the evening or on sunny days.

3. Breeding management

(1) Feeding: The principle of "regular time and quantity, fixed location and quality, small amount and frequent feeding, and specific adjustment" should be followed. Set up 3-4 feeding tables in the pond and feed 4 times a day for half a month after stocking. It is best to feed the special compound feed for white shrimp from a regular manufacturer and supplement it with natural bait appropriately. As the number of days increases, the feeding amount should be continuously increased to allow the shrimp to grow better.

(2) Water quality: Although shrimp fry are desalinated, they still have seawater habits, so 50ppm raw salt should be added to the pond before stocking, and then raw salt should be added as appropriate. The water level should be maintained at 50cm within one week after the shrimp fry are stocked, and then increased by 5cm every day until the water depth reaches about 160cm. Change the water by 20% every 4-5 days, and apply 12-15ppm quicklime every 10 to 15 days.

(3) Disease prevention and control: Although the morbidity and mortality of Penaeus vannamei in desalinated culture are relatively lower than those in marine culture, we should not be complacent. First of all, we should purchase high-quality shrimp seedlings produced by regular manufacturers and conduct PCR tests on the shrimp seedlings to see if they carry pathogens. This can effectively prevent the degeneration of Penaeus vannamei seedlings. In the breeding process, we must have the awareness of "prevention is better than cure" so as to prevent problems before they occur.

2. The difference between prawns and shrimps

The prawns mentioned in my country generally refer to Oriental prawns (prawns), which are different from the mud shrimp as follows:

1. Body shape difference

Compared with the mud shrimp, the Oriental shrimp is larger in size. Even the smaller male shrimp is much larger than the mud shrimp, not to mention the largest female shrimp. The Oriental shrimp is generally 15-20 cm long and weighs between 30-80 grams, and the heaviest one weighs half a pound; the mud shrimp is generally 10-15 cm long.

2. Difference in body surface color

Generally, when the Oriental shrimp grows to a certain stage, its shell color will be a bit bluish-gray, and the shrimp body will be smooth and transparent; while the color of the mud shrimp will be a bit yellowish, such as khaki or brown, with more black spots on the shrimp body, and a slight red in the shrimp feet.

3. Difference in taste

The meat of the Oriental shrimp is relatively not as good as that of the mud shrimp, and it tastes chewy. Common cooking methods in life include salting, braising, grilling, and frying. The biggest feature of the mud shrimp is its thin shell and fat meat. Its shrimp shell is thin and the meat is tender, which is suitable for blanching, making soup, grilling, etc.

4. Differences in breeding environment

Oriental shrimp is a kind of marine shrimp, which has high requirements for the breeding environment, and has certain requirements for water quality, bottom quality and breeding density; although the mud shrimp is also a kind of marine shrimp, it has lower requirements for the salt content of the water body, can be farmed in fresh water, is suitable for inland breeding, and the breeding scale is also larger.