How to raise the river crab for sale

The crabs are raised temporarily, and the sexually mature crabs are harvested for a short period of time to be reared and fattened for sale. However, if improper management during the holding process, it will easily cause a large number of temporary crabs to die. The reasons are the following: 1. Physiological death. When the gonadal gonads mature, they will undergo genital migration for reproduction. If they continue to be raised in freshwater, they will cause physiological disorders, and the osmotic pressure in the body will be too high to die. Therefore, in the process of holding crabs, excessively mature yellow crabs should be removed. 2, crab quality is poor. Temporary crabs have different sizes, ranging from large to small, and have a high stocking density. Some temporary crabs are supplemented with crabs and limbs. This can easily result in killing each other in the process of holding, resulting in a high mortality rate with a small size, and can also easily cause the spread of crab disease. The temporarily raised crabs die due to onset. 3, poor ecological conditions. The small holding pool area, low water and grass coverage, shallow water levels, rapid changes in water quality, and low dissolved oxygen often cause crabs to frequently land ashore and breathe oxygen in the air, resulting in a lot of physical exertion, over time, and a high mortality rate. . In addition, water quality fertilizers have a high density of temporary stocking and can easily cause suffocation and death of crabs. 4, lack of feeding amount. During the holding period, the water temperature was above 4°C and the crabs were still eating well. For example, the amount of feed is insufficient and there are few natural foods in the holding pool. First, the river crabs will kill each other in order to compete for limited bait and affect the survival rate. The second is to cause the crabs to escape due to feeding. The above situation, prevention and control measures, is a scientific choice of holding pool. Select a pond near the water source, which is convenient for injection and drainage, with an area of ​​3-5 mu and a water depth of 1.5-1.8 meters. Use 100kg of lime per acre before use to completely clear the pool. After 5 days of influent water, the plants were evenly distributed in the pool and the coverage rate was above 40%. Second, crab quality requirements. Temporary crabs require a healthy body, uniform specifications, complete crustaceans, appendages, no disease, no injuries, and once put enough. The selected crabs were immersed in 4% saline solution for 10-15 minutes and sterilized. In case of soft shell crabs and shell crabs in the stocking process, they should be removed separately and temporarily raised in the shell and then put into the holding pool. Third, the holding density. The average mu raise crab 2000-2500 or 200-250kg, holding time: Liao crab 1-2 months, Chinese mitten crab 2-3 months. Fourth, strengthen management. During the holding period, feeding is performed once a day and the amount of feeding is 3-5% of the amount of crabs that are raised temporarily. The bait should be fresh and can not be rotted and spoiled, of which 60% is animal feed, such as small fish, crushed snails, chopped oyster meat, silkworm pupa, animal viscera, etc., can be fed vegetable diet: soybeans, wheat , sweet potato, pumpkin and so on. Every 5-7 days during holding period, choose to change the water at noon, change the water every time by 15-25cm, splash lime once every 20-30 days, increase the calcium in the pool, remove the bait, debris and dead crabs from the pool every day. Wait, keep the pool clean. During the holding period, regular sprinkling of 0.5ppm strong chlorine fines to disinfect the body of water, every half months with oxytetracycline, furazolidone feeding, even fed 5 days to prevent crab disease. If a water rat, water snake, frog, or other predator is discovered during the holding period, it shall be immediately killed.

Ziprasidone Intermediates
Ziprasidone is a medication of the atypical antipsychotic type. It is used for the treatment of schizophrenia as well as acute mania and mixed states associated with bipolar disorder. Its intramuscular injection form is approved for acute agitation in people with schizophrenia. Ziprasidone is also used off-label for depression, bipolar maintenance, and posttraumatic stress disorder.
Ziprazidone is approved by the U.S. Food and Drug Administration (FDA) for the treatment of schizophrenia as well as acute mania and mixed states associated with bipolar disorder. Its intramuscular injection form is approved for acute agitation in schizophrenic patients for whom treatment with just ziprasidone is appropriate.
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Ziprasidone Intermediates

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