The investment is about1-20,000. \x0d\ crayfish culture technology \ x0d \ x0d \ First, create a good environment for lobster growth. Lobster is a crustacean, which is similar to crab. It has a pair of specially developed claws and has the habit of burrowing, and generally burrows near the water. Lobsters like shade and are afraid of light. When the light is weak or dark, they climb out of the cave, and when the light is strong, they sink into the water or hide in the cave. According to the habits of lobsters, a 50-cm-high escape net can be added to the river pond to prevent lobsters from fleeing. At the same time, the river pond simulates the ecological environment of lobsters under natural conditions, and shallowly plants 10- 15% of aquatic plants and hidden objects beside the pond to create an environment for lobsters to inhabit and shell, so as to reduce mutual killing. \ x0d \ x0d \ The influence of water quality on lobster production cannot be ignored. The quality of water directly affects the healthy growth and development of lobsters. In the process of culture, the ph value of pond water is maintained at 7.5-8.5, and the transparency is 30-40 cm. It is necessary to add fresh water frequently, sprinkle quicklime solution regularly, adjust the water quality, and prevent diseases and incomplete shelling. \ x0d \ x0d \ Second, feed reasonably. Lobsters will kill each other when they are hungry and have insufficient food, so the feeding amount must be sufficient. Lobster feed is animal and plant feed. Plant feed is wheat, aquatic plants, rapeseed cakes, etc., and animal feed is miscellaneous fish, miscellaneous meat and livestock viscera, etc. Usually, the feeding time, feeding amount and feeding method are determined according to the habit of lobster lying in the daytime and coming out at night and the density of shrimp in the pond. Otherwise, it will increase the cost of feed and reduce the benefit of breeding. \ x0d \ x0d \ Third, scientific fishing. In the process of lobster culture, young shrimps can grow to commercial specifications in 60-90 days under the condition of suitable temperature and sufficient feed. Seedlings will be released in March, and rotation will be started around June, and the big ones will be sold and the small ones will be kept. Due to the large catch and the small catch, the catch rate can be improved and the price can be sold at a good price, so as to achieve the goal of high yield and high efficiency. \x0d\\x0d\ freshwater crayfish) Introduction to culture technology \x0d\ freshwater lobster, the scientific name is crayfish, also known as lobster, lobster and red shrimp. The shrimp originated in the United States and was introduced to China from Japan during World War II. Now it has been widely distributed in the middle and lower reaches of the Yangtze River. The shrimp belongs to freshwater shrimp in warm zone, which has strong adaptability, high reproduction rate, miscellaneous eating habits, fast growth, disease resistance, high temperature resistance and hypoxia resistance, and will not die after being out of water for hours. Shrimp meat is tender and nutritious, containing 8 kinds of amino acids necessary for human body, but low in fat, containing more tropomyosin and paramyosin, and high in edible parts. Deeply loved by domestic consumers, the export volume is also increasing, the sales and purchase prices are rising, and the breeding prospects and benefits are promising. \ x0d \ x0d \ Freshwater lobsters widely live in freshwater lakes, rivers, ponds, ditches, rice fields and other waters. Benthic organisms, plankton and various aquatic plants are palatable bait and grow well in these waters. Young shrimps live in shallow water or near the pool, and like to burrow, sometimes hiding in the hiding place of gravelly aquatic plants. Usually, shrimp burrows are dug in the beach area where there are more clay in marshes around the water surface and reeds grow. The shrimp burrows are generally round, inclined downward, up to about 30 cm deep, and the winding directions are different. The habitat of freshwater lobster often moves seasonally. In spring, the water temperature rises, and shrimps mostly move in shallow water. When the temperature is not high in midsummer, it moves to the deep water; Overwintering in caves in winter. Freshwater lobsters molt, grow and reproduce in caves to avoid being hurt, and they prefer shade to light, and climb out of caves when the light is weak or dark. In rainy season, freshwater lobsters often climb to land for activities. The shrimp also has strong hunger tolerance, which can generally endure hunger for 3 to 5 days; Generally, you won't starve to death if you don't eat for 20~30 days in autumn and winter. The optimum temperature for feeding is 25 ~ 30℃; When the water temperature is below 15℃, the activity is weakened; When the water temperature is below 10℃ or above 35℃, the food intake is obviously reduced; When the water temperature is below 8℃, enter the wintering period and stop eating. The life span of freshwater lobster males is generally 20 months, and that of females is 24 months. \x0d\\x0d\ Freshwater lobsters usually mate and hold eggs from the end of/kloc-0 to March of the following year. The mating time varies in different waters, and the eggs are often immature when mated too early, and they are over-mature and aging when mated too late. The suitable water temperature for mating is 22~25℃, and it is best not to fish in mating season, so that it can hatch with eggs and reproduce. Freshwater lobsters mate in spring, summer and autumn, and can lay eggs 3-4 times a year. Generally, parent shrimps with a body length of 7-10 cm and a body weight of15-30 g have 220-270 eggs, but their eggs vary greatly with individual size. Under normal circumstances, the hatching process (i.e. embryo development) needs 1~2 months after mating and spawning, which requires a lot of physical strength, so it is necessary to strengthen the nutrition and cultivation of the egg-bearing shrimp. The suitable water temperature for hatching eggs is 22~27℃, and the incubation time is 6~ 10 week. Before shrimp larvae are cultivated, it is necessary to clean the pond and disinfect, filter the water, and then apply organic fertilizer to cultivate natural bait organisms for shrimp larvae to eat. Generally, the stocking density of shrimp larvae is15 ~ 200,000, and if it is cultivated by "soybean milk" method, the stocking density can be16 ~180,000.