Shrimp pool culture puffer fish technical points

Breeding of puffer fish in the shrimp pond is a new breeding method that has emerged in recent years. This method has the characteristics of stable yield, low risk, strong disease resistance, low feed coefficient, and large output efficiency. The cleaning and preparation work is not limited to the size of the pool of farmed puffer fish. The most suitable pool is less than 100 mu. The bottom is flat and there is no sludge. The pond water depth requires 1.2-1.5m or more. If you use it for many years In the pond, the bottom of the pond is to be turned and exposed, so that it will accumulate and decompose black mud and rancid mud. The same time, 100-150 kilograms of lime per acre is used. The entire pond is splashed, and the bottom of the pond is disinfected and killed. Miscellaneous fish, mixed shrimps and other organisms gradually recover to the low-level ammonia nitrogen index and disappear after a winter season. In the middle of March in the second year of the spring, the bottom of the water is flushed to the bottom of the pool. After rinsing and irrigating 1-2 times, the humus will be discharged with water. After the new water is introduced, the water level of the pond will be kept at 50cm, and the organic ammonia will be applied. Nitrogen fertilizer, so that the pool. Early feed enough, transparency is appropriate, gradually increase the depth to 1.0m or more, in May after the release of shrimp. Later, with the increase in water temperature, juvenile fish began to enter the pool, then generally require the pond water temperature 15 °C to. On the salinity between 23-30 °C, dissolved oxygen is greater than 4mg / L or more, pH value between 7.6-. 8.2. Second, the release of fry puffer fish fry are generally hatched seedlings, practice. Practice to prove that in the selection of seed, it is necessary to choose pure varieties, no injury, good physical, uniform seed size. Casting. The best time to put the time from late May to early June, fish fry into the pool before soaking with disinfectant drugs for 5 minutes, then the stocking specifications per acre of 200 to 300 / kg of young fish fry 1000 tail, from September of that year. The average body weight can reach 150-170g or more. As long as the management is good, the survival rate can reach 7.0% or more. Third, aquaculture production management 1. Puffer fish diet is mixed. More commonly known as ancient fish, lollipops, herring, scallops, clams, and shellfish are mainly leftovers, and they need to be chopped with a knife when feeding, and then cleaned. 2. Feeding method. Puffer fish has strong timeliness and memory. The young seedlings that have just been put in can be given fixed-point and time-feeding. This not only saves feeding time, but also saves bait, and also protects the bottoms. Feeding method is to adhere to 4 times a day feeding, feeding amount to reach 5-8% of body weight. 3. Water quality management. During the entire cultivation period, the control of water quality must be strengthened. The minimum water depth needs to be maintained at a depth of 1.0m or more. Generally, when the summer heat is severe, the amount of water circulation should be increased. Each time, the total water body should be maintained at more than 30% and maintained. More than 40cm transparency is appropriate. 4. Sub-pool. As the body weight of puffer fish increases, the breeding density increases accordingly. This time, the pooling is started. Generally, it is selected. During the middle and late period of June, the fish in the sub-pool must be subjected to teeth cutting, otherwise it will seriously affect the fry. The survival rate. 5. Drug control. In current puffer fish culture, there is generally no disease. However, when there is not enough food and nutrients are lacking, they will fight each other and bite wounds and gradually become infected. After the fish is drained, it is necessary to Dispense 1-2 times of disinfectant, mix and mix sulfamethoxazole, oxytetracycline and other drugs in the feed for prevention and treatment, and then feed fresh feed.