The amount of new shrimp introduced into the sea aquaculture area of ​​30 acres, after more than three months of careful management, when harvested, the average body length of shrimp reached 10cm, communist shrimp 1550Kg, average yield per mu 51.6Kg, production value of 2064 yuan, the total output value of 61920 yuan, 30 Acres shrimp pond net profit 31,290 yuan, input to output ratio 1:2.1. The success of this aquaculture technology is expected to solve the economic losses caused by the viral shrimp disease in China in the past few years in our district, and it will also be necessary for our district to make full use of the shrimp pond area in the future, increase production, increase benefits, and promote application. .
1, materials and methods
1.1 Selection of ponds The amount of new shrimp Seawater shrimp ponds are located on the north bank of Jiaozhou Bay, and they are convenient for water intake and drainage. Shrimp pond area is 30 acres, a total of two pools, pool water depth of 1.2-1.5 meters, rectangular, flat bottom, bottom sediment is half mud bottom (mud pond mud in 5cm) no pollution outside the pool, into the drainage system, The inlet is filtered with a 80-mesh grate net to prevent wild fish from entering, and the drain outlet is provided with a dense net to prevent shrimps from escaping.
1.2 Qingchi disinfection The mariculture ponds are first cleared of sediment sludge in the pond before stocking, followed by 100-150 kg of lime per acre, and the whole pond is splashed with clear water (7-8cm can be left in the pond, 10-15kg per mu, and bleaching powder is used. Pool spilled disinfection. Kill pathogens, parasites, bacteria, etc., suppress the occurrence of viruses, improve shrimp pond PH value, disinfection time is generally about 15 days before planting.
1.3 Fertilizing water disinfection After 10-15 days of disinfection, the filtered fresh water is injected into the pool, and then about 100 kg of fermented organic fertilizer (human waste, cow dung, pig manure) is applied per acre of water. Urea 2 Kg, 1 kg of superphosphate, basic biological feed in the culture pond (the amount of fertilizer in the new pond needs to be doubled). After about 10 days, the color of the water changed to light yellow-green, and the seedlings can be appropriately planted.
1.4 Time for planting and cutting time New shrimp introduction and breeding After everything is ready, buy a lively and healthy shrimp with a specification of 0.7-1cm from Liuting Airport at 12 noon on June 12, 2000. To come) to the unloading stock of the mariculture tanks of the Sheung Ma. A total of 500,000 new shrimp shrimps were put into the mariculture ponds. They were put into No. 1 and No. 2 ponds after counting. When the seedlings are released, the weather is fine. Dongfeng is graded 4-5. The water temperature is 26-27°C at 1:00, the salinity is 28‰, the pool water level is 40-60cm, and the PH value is 7.2-8.5.
1.5 Seed transport seedlings are transported using a foam insulation box. The box is filled with nylon plastic bags. The bags are turned into water, placed in seedlings, flushed with oxygen and sealed. After all the work is completed, the aircraft is flown from Xiamen Shantou Aircraft Factory to Qingdao Liuting Airport. Each foam insulation box contained 50,000 shrimps and a total of 10 incubators. After receiving the shrimps, they were transported to the mariculture pool for stocking with large trucks.
1.6 Stocking density seedlings When transported to the breeding test pond for stocking, the survival rate of the counting pool is more than 60%. The size of the shrimp seedlings is 1.0 centimeters, and the total number of seedlings in the 1 and 2 ponds is 300,000, and the average mu is set at 10,000.
1.7 Feeding time, amount of shrimp seedlings mainly rely on fertilization to cultivate plankton. From June 20th on, Artemia mainly feeds. Feed once a day (200-250 pounds), that is around 6:00 p.m. on July 22, with artificial bait as the main ingredient, feeding 100 kilograms per day, twice a day, that is, 40% at 5 o'clock in the morning, 6-7 p.m. At 60%, it is fed three times a day for a total of 125 kg in August, ie 5:00 in the morning, 6:30 in the afternoon, 11:30 in the night, and the amount of bait accounts for 30%, 40% and 30 of the total amount of bait. %. From September 1 to the harvest, during this time, due to the lower temperature and temperature of the water, the food intake of the prawns weakened, the growth was slow, and the amount of feeding was reduced. The shrimps were also fed reasonably according to the body length and density of the shrimps and fed twice a day. At 6 o'clock in the evening, the feeding amount was half of the previous period and each accounted for 50%. According to the feeding rule of the new amount of shrimp, take the evening early evening feeding, and set the way of feeding (6-8 points per pool), in order to check the feeding situation, adjust the amount of feeding at any time to ensure that the shrimp is full, normal Grow.
2, daily management
2.2 Control Water Quality Regularly detect water bodies and water quality to ensure PH value within the range of 7-9, dissolved oxygen is not less than 4mg/l, water color is yellow-green or dark brown, transparency is maintained at 35-45cm. In the initial stage of stocking, the water level is about 80 cm. After that, the water exchange volume should be increased every 10 days or in high tides, especially when the water temperature is high, the water level should be deepened, and the water should be drained regularly to keep the water quality clear. This will give the shrimp a good water environment, promote shrimp oyster shells, and speed up shrimps. Grow.
2.3 Intensive patrol pool, adhere to the daily patrol pool, observe whether the food bait feed point is eaten by the shrimp, adjust the feeding amount according to the situation of eating and drinking, regularly observe whether the shrimp activity is normal, and find that abnormalities are handled in time. The body length of the shrimp was measured every 10 days or half a month.
2.4 Prevention and Control of Shrimp Disease: In the process of aquaculture of fresh shrimps in seawater ponds, it has been proved that the incidence rate of new shrimps is lower than that of other shrimps. From the current breeding point of view, no shrimp disease has been found. However, we always adhere to the principle of prevention and strengthen prevention and control of shrimp disease throughout the entire breeding process.
2.5 After 3 months of cultivation and management (ie end of September and early October), when the body length of the shrimp reaches an average of 10 cm or more, it can be harvested and marketed according to market demand. Commonly used fishing methods include: (1) The cage net is set around the shrimp pond at night and the net is set in the four corners. The shrimp is easy to enter and is not easy to go out. It can be caught and listed at any time, especially at the outlet of the shrimp pond, and lights are set on the net. optimal. Take round and arrest, use this method more. (2) When the water temperature drops below 15°C, the shrimps basically stop feeding and growing. After the fish is caught, the remaining shrimp can be caught in the dry pool water and the shrimp can be caught.
3, the results amount of new shrimp introduced shrimp shrimp breeding pool 30 acres of shrimp breeding pool communist shrimp 1550 kg, the average yield of shrimp 51.6 kg, the average shrimp body reached 10cm, the market price of 40 yuan per kilogram, the output value of 2064 yuan, The mu cost is 1,000 yuan, the total output value is 61,920 yuan, and the total cost is 30,000 yuan. The 30 mu shrimp pond has a net profit of 31,200 yuan and the input-output ratio is 1:2.1.
4, summary
4.1 The amount of new shrimp is shallow sea shrimp near the shore, often in sandy or semi-soily bottom sea area. The shrimp is adaptable to the environment. When the weather is cold, it is often hidden in the bottom. Even during the appropriate temperature period, the shrimp is lurking in the bottom, revealing only two eyes and tentacles. The food habit is omnivorous and animal-like. It resembles prawn in the larval stage, predominantly predator-feeding organisms in the larvae, eats the ground plankton, and likes feeding in the early evening or early morning. The tolerance to low dissolved oxygen is stronger than that of shrimp. The asphyxiation point of juvenile shrimp is 1.64 mg/l and that of adult shrimp is 0.60-0.30 mg/l. It can grow normally in water with a pH of 7-9. The new amount of shrimp is a broad-salted shrimp, and it is resistant to disease. It is suitable for breeding in seawater ponds in our region, can live normally in 32-35 seawater, and can also grow well in freshwater.
4.2 The amount of new shrimps in seawater ponds has been successfully bred, which is expected to solve the economic losses caused by shrimp farming during the years of viral shrimp disease in our region, and it will also help improve the utilization rate of new varieties of shrimp pond culture.
4.3 The aquaculture test proves that the new species of new shrimp will not be able to be cultured in the same pool as crabs, shellfish and carnivorous fish in the benthic habitat. This shrimp is also a kind of shrimp for benthic life. The aquaculture will have a phenomenon of residual food, reduce the survival rate and reduce economic benefits.
4.4 The amount of new shrimp life habits determine its survival, the shrimp like sand or semi-sand sediment, like the clear water quality, do not like mud sediments, water quality turbid environment, not suitable for high-density precision culture.
4.5 It has been proved through experiments that in the future, if the large-scale, high-density culture of the new shrimp must choose sediment or semi-sand sediment quality, and the water quality is clear into the drainage conditions are superior.
4.6 The amount of new shrimp is the new breed that is the first choice for the breeding of seawater shrimp ponds in our station, and it is also the first trial of seawater shrimp ponds and freshwater ponds in Qingdao. The success of this project will surely make full use of shrimp pond area, increase production, and increase economic benefits in the future.
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Pack |
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1 ml Serological Pipette |
P8010-5 |
1/100 |
Yellow |
Gamma |
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2 ml serological pipette |
P8022-5 |
1/100 |
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Gamma |
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800pcs/box, 3200pcs/ctn |
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5 ml serological pipette |
P8050-5 |
1/10 |
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Gamma |
Individual |
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5 ml serological pipette |
P8052-5 |
1/10 |
Blue |
Gamma |
Bulk |
300pcs/box, 1800pcs/ctn |
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10 ml serological pipette |
P8100-5 |
1/10 |
Red |
Gamma |
Individual |
200pcs/box, 1200pcs/ctn |
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10 ml serological pipette |
P8102-5 |
1/10 |
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Gamma |
Bulk |
200pcs/box, 1200pcs/ctn |
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25 ml serological pipette |
P8250-5 |
1/5 |
Purple |
Gamma |
Individual |
200pcs/box, 800pcs/ctn |
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25 ml serological pipette |
P8252-5 |
1/5 |
Purple |
Gamma |
Bulk |
200pcs/box, 800pcs/ctn |
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