Lobster farming technology

1. Broiler selection can choose broodstock from September to October in the previous year or from March to April of the same year. It requires a weight of 30 to 50g, complete appendages, health and disease-free, strong activity, male to female ratio of 2 to 3:1. Male and female lobsters have obvious features in appearance and are easy to distinguish. 1 Mature lobsters, males are significantly larger than females; 2 Males have large feet, and there are bright red soft ticks on both sides of the dragon feet. The female dragon feet are relatively small, and most of the female feet do not have red soft palate. The color is also lighter; 3 male gonads open at the base of the 5th foot, female genital hole is open at the base of the 3rd foot; 4 Sexually mature females have enlarged abdomen, and the male stomach is relatively narrow.
2. The broodstock breeding broodstock pool area is appropriate for about 1200 square meters, the bottom soil is made of loam, the water depth is about 1m, and the pond is more than 1.5m wide. There are sufficient and good water sources, and the injection and drainage outlets are built. The surrounding pool埂 Use plastic film or calcium plastic plate to prevent escape from the wall. Before the stocking, the pond should be disinfected with 50-60kg/kg lime dry pond for 7-10 days before stocking. After disinfection, it is filtered (to prevent miscellaneous fish from entering the pond). The water injection depth is about 1m, and the decomposed livestock and poultry manure is applied to water quality of 500-800kg/mu. Into the pond, concealed objects such as branches, roots, bamboo tubes, etc., are provided for shrimp climbing and some plants are transplanted. The broodstock pool can be used for broodstock production of 40-60kg/mu. Before stocking, it is bathed with 3% saline for 10 minutes to kill pathogens. In order to make full use of the water body and regulate water quality, 50 to 100 tails per mu can be mixed. During the cultivation period, fresh water grass, bean cake, wheat bran or compound feed can be fed and a part of animal feed can be added. Such as chopped snail meat, livestock slaughtered leftovers and so on. Daily feeding amount: In March, 2% to 3% of the body weight of broodstock, 4% to 5% in April, 6% to 8% after May, and 1 feeding each morning and evening, mainly in the evening. It accounts for 70% of the amount of bait. At the same time strengthen water quality management, change the new water once every 10 to 15 days, each time changing the water 1/3; every 20 days with lime 10 ~ 25g/m2 watered spilled once, in order to maintain good water quality, promote gonad gonads development.
3. Broodstock breeds from April to May. When the water temperature is above 20°C, broodstock begin to mate. Fertilized eggs hatch into juvenile shrimp in the female's abdomen, and hatching takes 40 to 70 days. After juvenile hatching, the growth and development of juveniles are completed under maternal protection. When young shrimp leave the mother, they can take food and live independently. When a large number of juvenile shrimps are found in the breeding ponds, the seedlings should be harvested in time for the cultivation of shrimps.
4. The broiler shrimp winter lobster survival temperature minimum value is 5 °C. However, when the water temperature is lower than 9°C, the mortality rate is high during the overwintering period for shrimps of about 3cm in size, and although adult shrimps can survive, there are also a large number of deaths after 2 to 3 months. Therefore, do a good job of wintering the broodstock and ensure that the water temperature during the winter is between 16°C and 18°C. The method of overwintering of broodstock is the same as that of Macrobrachium rosenbergii. Commonly used wintering methods include plastic film-covered pool insulation method, electric heater heating method, hot spring water overwinter method, factory residual hot water overwinter method and glass room overwinter method, etc. The safe wintering effect of broodstock.

Freeze Drying The full name is Vacuum Freeze Drying, also known as Drying by Sublimation. It is used to freeze the liquid material into a solid. Under the conditions of low temperature and pressure reduction, the sublimation performance of ice is utilized, A method to dehumidify the material to achieve the purpose of drying.
Vacuum freeze-drying to a large amount of water-containing substances, pre-cooled to freeze the solid. The water vapor is then sublimed directly from the solids under vacuum while the material itself remains in the ice shelf when it is frozen, so it dries and remains unchanged in volume and becomes porous with good rehydration performance. Freeze-dried vegetables or foods, its most important feature is to retain the color, smell, taste, shape and original nutrients of nutrients, also known as aerospace food, is today's natural, green, safe and nutritious food.

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