White shrimp, scientific name of white-tailed shrimp, can be collected every year from April to October. This article describes the three technical points of shrimp culture.
First, the main living habits
The white-tailed shrimp is highly adaptable to the environment. It can survive at a salinity of no more than 32 ‰, a water temperature of 2 CC to 35 CC, and even survives at a water temperature of -3 CC. When it is cold at low temperatures, it can be hibernated by drilling holes. Habits. The fastest growing in brackish water, poor tolerance to hypoxia, less than 1?/L, will die of oxygen deprivation.
The white-tailed prawn has a mixed diet and a low protein content. Regardless of animal and plant diets, low-grade pellet feed can be fed and the feed source is wide.
The white-tailed prawn has strong reproductive ability, and females can lay eggs continuously. The breeding peak of white-tailed prawn in breeding ponds is from April to June and from August to September, of which peaks are from May to June. It takes only 2-3 months for the ridge-tailed white shrimp to grow to more than 5 inches. The growth cycle is short, and it can be arrested several times a year. As long as you pay attention to the culture and management, you have better aquaculture efficiency.
Second, aquaculture technology
1. Pond conditions: The general ponds can be cultured. The ponds should be selected for pollution-free surroundings. The ponds should be silted with an area of ​​15-25 mu. It is advisable to separate the ponds from the drainage system. There are ring grooves in the ponds and ponds. The surface water depth is 1.5-2 meters, and the water depth of the ring ditch is about 2.5-3 meters.
2, water quality requirements: the transparency of the pond water in the 20-30?, to ensure that in the case of early feeding, shrimp feed can be provided, and some hatched shrimp hatchery to provide open bait, timely maintenance of the pond bottom quality, To prevent the production of harmful toxic substances; to adjust the water body bacteria and algae phase, to keep the water quality and tender and refreshing; remove water dinoflagellates, supplement beneficial bacteria, promote the production of beneficial algae, provide a good environment for the growth of small white shrimp.
3, species shrimp stocking
(1) Stocking specifications: 200 heads/kg, body length 5-7?
(2) Stocking density: 1.5-4 kg/mu, generally 2-3 kg/mu.
(3) Stocking conditions: the water color is yellow-green, tender green, dark brown, transparency is 3.-40?
(4) Restocking time: Generally, it will be available once in mid-June, mid-July and mid-July in August.
4, aquaculture management
(1) Feeding of bait: Generally, the long-grained wheat is mainly processed by oneself. In August, the small-sized mixed fish is started to be fed. The feeding is generally divided into early and late ones, and the amount of feeding is 30%-40% of the total amount in the morning. In the evening, it accounts for 60%-70%;
(2) change the water. The pond water level is maintained at about 1 meter. The water level in the high and low temperature period should rise to 1.2-1.5 meters. The water level in the small flood season should be mainly water. The water level should be changed as much as possible during the flooding period. Generally, the water change is once in 3-4 days, and the water exchange rate is 10%-20%. In order to promote the shelling of small white shrimp, when the water quality in the pond is poor, it is necessary to increase the water exchange volume;
(3) Regular detoxification, detoxification, and detoxification of pond water during the shrimp culture period to ensure the survival rate of small white shrimp;
(4) Diligent aeration to change the bottom: Ensure that the pond has sufficient dissolved oxygen, and the maintenance of pond sediments from time to time provides a comfortable environment for the growth of small white shrimps;
(5) Disease prevention and control: Adhering to the principle of "giving priority to prevention and combining prevention and control", we must take measures for prevention and control of diseases through the methods of ecological prevention and control, regulate water quality, improve substrate quality, and regularly detoxify and detoxify drugs. In the early stage of breeding, some EM bacteria preparations were used to decompose ammonia nitrogen and improve the bottom of the pool.
Three, shrimp caught
When the white shrimp grows to more than 5, it can be listed for sale. The methods of fishing are to collect shrimp and shrimp, to catch shrimp, and to catch it in cages. The white shrimp grows quickly, has a short breeding cycle, high fertility, and usually catches large and small, ensuring that there are enough spawning parents in the pond to ensure aquaculture production and economic benefits.
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