It is a kind of important economic shrimp that is unique to China. It has delicious meat and rich nutrition. It can be processed into dried products in addition to fresh food. In the autumn and winter of shrimp ponds, white-tailed shrimps are cultured, that is, after the second-long-tailed shrimps are harvested, white-seedlings are harvested from the seedlings or broodstock by self-cultivation and raised to live for sale before and after the Spring Festival. With the characteristics of low cost, short cycle, easy management, and high profitability, it is worth promoting everywhere.
First, the biological characteristics of white tail shrimp Habitat habits. The white-tailed prawn lived in the shallow sea near the shore and has strong adaptability to the environment. The suitable temperature range is 2°C~39°C, and the water temperature can also survive at -3°C. The salinity range of 3.87 ‰ 30 å‡ can be adapted. The fastest growing in brackish water. Poor tolerance to hypoxia, below 1 mg/l, can result from hypoxia.
2. Diet and growth. The tail-tailed white shrimp has a wide range of dietary habits and can feed on both animal and plant foods, but especially eats fresh fish, shrimp, and shellfish. The growth cycle is short, 2 to 3 months can grow into commercial shrimp.
3. Breeding habits. The white-tailed white prawn has a high fertility, and it is almost always held egg-bearing shrimp. Breeding period generally occurs in the spring, summer and autumn, about 10 times a year.
Second, ridge tail shrimp shrimp pond breeding 1. Shrimp pond conditions. General shrimp ponds can be cultured, but especially in the bottom of the harbor, the sea water salinity is low, and shrimp ponds rich in natural white shrimp resources in the nearby sea area are the best.
2. Leave white shrimp seedlings. Different methods can be adopted according to different situations. 1) Long-haired shrimps are collected from the late July to mid-August of the lunar calendar. White-shrimp seedlings should not be more than 2 cm long. Care should be taken to keep the white-shrimp seedlings in the pond. When shrimps are generally placed, the long-haired shrimps first exit, and finally a large number of white shrimps are hatched. This time, they must close the gates in time and repeatedly put the shrimps. The shrimps can be put to the end and the white shrimps can be kept. Shrimp seedlings. 2) Pay close attention to the occurrence of white shrimp seedlings in the sea area. When the last shrimp seedling appears, take the method of draining the net into the water tight network to incorporate the white shrimp seedlings. 3) Use fertilizer and water to breed white shrimp seedlings to increase the density of shrimp seedlings in ponds. After the last batch of white shrimps in the pond are in the early August of the lunar calendar, they stop entering and draining the water and increase the density of algae in the pond through fertilizing bait so that the white prawn has sufficient feed after hatching, which can greatly increase the survival rate of the shrimp seedlings. If there are not enough eggs in the pond, they can be caught from the sea. In general, the amount of mu is 150 to 200. The combination of the above three methods can achieve better results.
3. Feed the bait. Adhere to feeding every day, shrimp can be used with food, fresh shrimp material, also available wheat bran, No. 4 powder, etc., depending on the density of shrimp in the pond, the size of the shrimp and eating conditions determine the amount of feeding. In the early period, it gradually increased in the middle period, and later, as the water temperature decreased, the amount of feeding was reduced or basically not cast. Generally, 0.5 to 1 kg dry feed is fed per acre. In winter, the water temperature drops below 5° C. White shrimp have not eaten, and feeding is stopped at this time.
4. Clear the enemy. Due to the unfinished pond after the capture of the second-generation long-haired shrimp, and the fact that the naming would inevitably lead to enemy-immune organisms, it is necessary to use 15ppm of the tea seed cake in the early stage of the cultivation to clear the pond.
5. Water quality management. Every time there is a large tide, the water will enter and drain once and change the water volume by 10~20% to promote the peeling of white shrimp. If the water quality in the pond is poor, increase the water exchange.
6. Patrol inspection. The patrol pond should pay attention to observation of shrimp feeding, growth, water color, embankments, inlet and outlet gates, gate nets, etc., and encounter adverse weather conditions. In particular, it is necessary to observe and take timely measures to ensure the safety of shrimp ponds and the healthy growth of white shrimp.
7. Timely arrest. Before and after the Spring Festival, the body length of white shrimp has grown to 5~6cm, and the market price is the highest. It can be listed and sold fresh.
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