Green shrimp, also known as grass shrimp, is a unique and highly valued species in our province's aquaculture industry. It has gained considerable recognition both domestically and internationally due to its high quality and market demand. Below are the main technical practices for pond farming of green shrimp.
1. **Pond Conditions**
A suitable location with abundant and clean water sources is essential for building shrimp ponds. The size of each pond should be kept under 7,000 square meters, but for easier management, it is recommended that individual ponds range from 1,500 to 3,500 square meters, with a water depth of 1.5 to 2 meters. Before stocking, the ponds must be thoroughly cleaned and disinfected. If possible, drain the water and expose the pond bottom for about a week to eliminate pathogens. A deep ditch should be dug at the bottom, and one side can be designated as a collection area for easier harvesting. Submerged aquatic plants such as *Vallisneria* or *Hydrilla verticillata* should be planted around the pond bottom, covering about 1/4 to 1/3 of the total area. Additionally, bamboo shoots can be bundled into brooms and placed in rows within the water to provide shelter for the shrimp. These bamboo sticks can be removed and dried after netting, allowing for reuse.
2. **Stocking Shrimp**
Shrimp stocking can be done during summer or autumn. Summer stocking usually takes place from early March to April, aiming to raise wintering seedlings. The size of the seedlings should be between 1,000 to 3,000 per kilogram, and the stocking density is approximately 15,000 to 20,000 per 667 square meters. Autumn stocking typically occurs from June to July, using seedlings of 2,000 to 5,000 per kilogram, with a stocking density of 30,000 to 40,000 per 667 square meters. Healthy, uniform-sized seedlings with strong vitality and intact limbs are preferred. Stocking should be done on cloudy or sunny days, preferably in the morning or evening, to avoid stress caused by direct sunlight or high temperatures, which can reduce survival rates.
3. **Feeding Management**
Green shrimp have specific dietary preferences. They prefer plant-based feeds like peanut cake and soybean cake, and tend to avoid rapeseed and cottonseed cakes. They also enjoy eating clams and snails, but they do not efficiently utilize animal waste. The daily feeding amount should be controlled at 4% to 8% of the shrimp biomass in the pond. To improve feeding efficiency and adaptability, a combination of "spreading" and "casting" methods is recommended. Artificial feed should ideally be made into pellets rather than powder. The feed formulation should include 20% to 30% animal-based ingredients, along with bone meal, shell powder, crab shell powder, trace elements, and other necessary additives.
4. **Preventing Predation and Escape**
When using natural water sources, it is important to prevent wild fish and predators from entering the pond. Inflow water should pass through a fine mesh filter. Similarly, the outflow should be blocked with dense netting to prevent shrimps from escaping. When shrimp grow large or when the population becomes too dense, water levels can be controlled to manage density. If necessary, the netting can be adjusted accordingly. If wild fish are hard to control, small quantities of larger squid species can be introduced, as they tend to avoid preying on green shrimp, helping to regulate wild fish populations.
5. **Water Quality and Oxygen Control**
Green shrimp are crustaceans that thrive in fresh, well-oxygenated water. When dissolved oxygen levels exceed 5 mg/L, their feeding activity increases, and metabolism becomes more active. However, if oxygen drops below 2.5 mg/L, shrimp will stop feeding, and severe cases may lead to floating head syndrome and suffocation. Regular monitoring and aeration are crucial to maintain optimal conditions.
6. **Water Quality Management**
Freshwater should be regularly added to maintain a water transparency of over 0.4 meters. Daily inspections in the morning are essential. If shrimp are seen climbing onto the shore, immediate action should be taken, such as adding fresh water or activating aerators to increase oxygen levels. Fertilization is also important to promote the growth of natural food organisms. Organic fertilizers with long-lasting effects are recommended. When disease outbreaks occur, medications should be used cautiously, with strict attention to drug types and dosages to ensure safety and sustainability.
Frozen Cooked Shrimp,Frozen Scampi,Frozen Raw Prawns,Fresh Frozen Shrimp
Zhejiang Zhoufu Food Co., Ltd. , https://www.zhoufu-food.com