Red clams and their culture techniques
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The size of the cultured red-claw crayfish pond is 3 to 5 mu, and the water depth is about 1 meter. Besides the requirements for the dam surrounding the pond, the anti-escape facilities are also required. The earth pond yield can reach 250 kilograms, and intensive ponds can reach 500 kilograms. Prior to the stocking of shrimp species, the ponds must be disinfected by clear ponds, and aquatic plants or concealed species should be planted in ponds to provide quiet and comfortable habitats for shrimps. Organic and inorganic fertilizers should be used to cultivate abundant plankton, bacteria and protozoa. To get a good growth and survival rate.
After the water temperature is above 16°C and water quality is stable, larvae can be released, and 1.5 to 2 cm of shrimp can be placed between 5000 and 6,000 tails. It is possible to raise the amount of white peony, but it is not appropriate to breed mixed carnivorous and omnivorous fish. After stocking, the organic matter in the pond is quickly consumed and must be manually fed. Animal feed contains fresh fish, snails, cockroaches, and animal waste, and plant feeds have cake and pellet feeds. The daily feeding amount is generally 3 to 10%, and the feeding time is when the sun just comes out and goes down, and mainly in the evening. Feeding principle is "two fine, middle green." Adjust the amount of feed every week. Between 23 and 31°C is the optimum growth water temperature.
Red clams kill each other when they are clam shells, and they are active in the evening's turbid water. They do not dig holes like other species of crayfish. In pond culture, artificial habitats should be greatly increased to increase the survival rate of crawfish.
Water quality management: It requires early-stage fertilizer and water control with a transparency of about 25 centimeters. In the middle and late periods, the water is changed frequently, and the transparent control is about 35 centimeters. Microfluidic aquaculture can be used conditionally. Frequent application of quicklime can improve water quality and sediment quality and adjust pH; beneficial bacteria can also be used to regulate water quality and maintain adequate oxygen levels in the pond.
The disease of the red squid crayfish is not much. With reference to other crustacean control methods, the disease can be effectively controlled.
More than 50 grams of red crawfish can be listed, after 150 days of culture, specifications up to 75 to 200 grams. Fishing methods include trapping cages, counter-water trapping and dry pool trapping. The shrimp packaging and transportation can be transported dry like crabs. Under the conditions of temperature below 28°C and kept moist, the survival rate can reach 100% within 24 hours.
The culture of red-claw crayfish has the advantages of less investment, easy to grasp technology, quick effect, high benefit, etc. It is an emerging breed cultivated in recent years. Calculated according to the current market conditions, the cost of mu is 12,000 yuan, of which:
1. Seedlings: 5000-6000 acres of acre, 1.5-2 cm seedling price 1 yuan / tail, 6,000 yuan;
2. Feed: The mu feeding amount is 600 kg, the price is 4 yuan/kg, and the total is 2400 yuan;
3, Tang rent, utilities, wages, drug fees and other expenses, mu are about 3600 yuan.
Benefits: Out of specifications 75 to 200 grams / tail, survival rate of 70% (usually between 70 to 80%), per mu up to 250 kg or more, the market price of 80 yuan / kg, per mu output value of more than 20,000 yuan , Mu profit up to 8000 yuan.
