Autumn aquatic aquaculture management issues began to fall, the climate turned cold, all types of bacteria began to recover after the summer high temperature lurking active, but also for shrimp and crab market seasonal production season, aquaculture, in particular, should pay attention to strengthening management: 1, listed on the arrest, inter-density Orderly. New crabs are listed on the market to keep large and small, catch thin and fat, and use incubating nets at night to dig net operations and ground cage crab net operations. The tail-tailed white shrimp and shrimp are marketed according to local conditions. In principle, early signs of red-body, white-spot, and other diseases should be caught early. 2, disinfection and sterilization, take preventive measures. For large-scale catching ponds, especially shrimps, it is better to change the ponds to eliminate the miscellaneous fishes. The tea cakes can be crushed and then soaked in water for a day and night. 15 to 20 pounds per acre, pay attention to the avian response when using, because the current temperature is still at a high level, prone to over-oxygen and other over-reactions, if unpleasant, timely drainage into the water to reduce drug concentration. In addition, the use of quicklime (mu with 15 pounds) or strong disinfectant (iodine or chlorine dioxide 0.3ppm) Quanchiposa, disinfection, prevention. 3. Fine-tune water quality and stabilize the environment. The recent typhoon storms occur frequently and the pond aquaculture environment changes greatly. First, it is necessary to transfer water in a timely manner to stabilize the changes in salinity; secondly, to reduce the number of water inlets and outlets and the amount of water, because on the one hand, the quality of water in the coastal areas after storm surges is relatively poor. On the other hand, the cultivation of shellfish, such as the dumplings of the wolfberry fruit, has reached the natural breeding season of the medlar in the Mid-Autumn Festival. It is necessary to reduce the stimulation of the large platoons and large tracts. The third is to use the sediment modifier and the water quality improver to adjust the water to control the pond environment. . 4, rational feeding, strengthen management. At this time of the festival, on the one hand, stocking animals in the spring, such as blue crabs, can be put on the market. On the other hand, in the pond, young crabs must be placed in autumn. There are principles to be mastered in the management of farmed bait: First, do not waste, second, don't pause, and third, don't corrupt. The so-called three-point raising of the seven-point pipettes makes it very easy for the population of the white-tailed shrimp to live on its own in the absence of delirium. According to the observation of night feeding conditions of the aquaculture, a plurality of feeding points are set. According to the observation, the amount of food to be eaten within one hour should be appropriately increased, and the amount of feeding should be appropriately reduced after 2 hours. Appropriate plus bait to increase immunity, oral administration in the pound
Feed plus immune polysaccharide 2 two, allicin 2 two, vitamin C two, once every 5 to 6 days. 5, according to local conditions, Na Miao seed. In addition, when the crabs are put in the fall season, the density of the crabs should be controlled according to the conditions of their own ponds. Special breeding can be over 2000 mu/mu, and polycultures are between 400 and 800 mu/mu. The most suitable salinity for green crabs is 6 mu. ~12‰ and environmental conditions must be adapted to local conditions. For the production of white-tailed shrimp, it is necessary to focus on natural nano-seedlings, pay close attention to the occurrence of white-haired shrimps in the sea area, and adopt the method of draining water from the vegetable nets into the water network to enter the white shrimps. The use of fertilizer to reproduce white shrimp seedlings to increase the density of shrimp seedlings in ponds. Each time the white shrimps are caught, they must leave enough mature shrimp in the pond (1 to 3 kg per mu), especially in the autumn and winter months, leaving the parents in the lunar calendar in August. At this time, they stop entering and draining the water and raise the bait through fertilization. Algae density, and appropriate feeding of fish and shrimp, egg yolk, and soy milk. The egg yolks to be fed should be wrapped in 120-mesh sieves and then kneaded into egg yolk suspension. Like the soy milk, Quanchiposa, egg yolk, and soy milk The daily dosage is 10 to 20 ppm. White shrimp have enough feed after hatching to increase the survival rate of shrimp seedlings. If there are not enough eggs in the pond, they can be collected from the sea and add about 200 mu. (Yam Chunyu, Sanmen County Marine and Fishery Bureau)
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