Australian freshwater lobster farming technology (Part 2)

During this process, the average body length of juvenile shrimp is 0.8 cm. After 25 days of cultivation, it can reach 2.4～3 cm for farmers to carry out breeding production. Large (1～2 square meters ) water tanks can also be used. (2)Water quality?
During the production process, the suitable range of water temperature is 27～29℃, and the change cannot exceed 2℃. If the water temperature is lower than 20℃, the growth rate will slow down and the survival rate will be seriously affected. Therefore, the water temperature must be kept relatively stable during the entire cultivation period. The pH value of the cultivation water should be controlled at 7 ~ 8.5, which is slightly alkaline. If the water quality is found to be acidic, use quicklime to adjust the pH value. During the production operation, the breeding density of larvae is calculated by the number of egg-bearing shrimps that lay eggs, and also depends on the quality of the egg-bearing shrimps. If it is an earthen pond, just fertilize regularly to maintain appropriate plankton ( or water color ) in the water. (5)Habitat
The seedlings coming out of the pond can be used by farmers for breeding and production. Because juvenile shrimps are small and tender, handling must be careful and meticulous. Use foam plastic boxes (80cm×60cm×20cm) to put 600 seedlings in each box, and put a small amount of water hyacinth and a small amount of water for transportation, and the survival rate can reach四)Adult shrimp culture?
The breeding pond should be selected in a place with ventilation and sunshine, soil quality and water conservation, and water pollution-free. The area should be 5~10 acres. The water depth should be 1.5 meters. The bottom of the pond should be flat with no or little silt. It should have convenient water supply and drainage and protection and anti-escape facilities. ?
Generally, shrimp larvae with a body length of 3～5cm can be stocked per acre of water surface. The amount of feeding throughout the day should be based on the principle of eating enough, eating all the food, and leaving no residual food. 4.Strengthen feeding and management?
From the breeding experiments of Beijing Fisheries Science Research Institute, it is known that the living water temperature of red crayfish is 6～37℃, and the living water temperature of toothed crayfish is 1～35℃. The optimal water temperature for the growth of these two kinds of shrimp is Harvest and fishing?
(五)Development Prospects?
1.Economic value?
2.Biological properties?
(2)The individual size of adult shrimp is usually 100～150g/. Although it is larger than Macrobrachium rosenbergii, it is larger than giant lobster (1000～?
3.Problems of fecundity?
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