Aquatic animals such as fish, shrimps, and crabs are hypothermic animals. When the water temperature is below 10°C, most of them are in a hibernation state. When the water temperature is above 15°C, they enter the normal growth stage. Grasping the breeding management during the growing season is to improve the aquaculture production and efficiency. Important measures.
First, vote for food
The conventional fish should be fed with full-price compounding materials; besides feeding fine particles, the shrimps should also be properly fertilized to cultivate the natural bio-feeds in the water body; the crabs should be properly matched and fed to the crabs; Famous fish such as oysters, clams, black peony, and amberjack are mainly fed with meat-based baits such as small scads, snails, viscera, and quail. Feeding insists on the principle of timing, quality, positioning, and quantitative, ensuring that all breeds can eat enough, eat well, eat well, and grow healthily and quickly.
Measures to increase the effects of the batch culture: 1. Increase dissolved oxygen. 2, improve the bottom material. 3, choose a good food. 4, use feeding machine. 5, good tame food and transfer food work. 6, control wild fish.
Second, adjust the water quality
Every aquatic animal needs water quality suitable for its survival. If the water quality can meet the requirements, the cultured animals can grow smoothly. Water quality indicators mainly include: dissolved oxygen per liter of water should not be less than 3 mg, pH should be maintained at 6.5-8.5, ammonia, nitrite, hydrogen sulfide concentration should be strictly controlled.
The main methods of regulating water quality: 1. Correct use of aerators. 2, the use of water quality improver. 3. Regularly and reasonably add water and change water. 4. Regulate and control the biological communities of water ecosystems. 5. Add beneficial bacteria to the aquaculture water.
Third, a reasonable set of support
The first is to place famous fish species such as squid, sea bream, and stingray, especially the surface of crabs. Generally, 10-15 species of squid, 5 to 10 centimeters in length, or 10 to 10 centimeters in size 300 tails, can increase the yield of 5 kg per acre, 25 kg of commercial fish Astragalus. The second is to set the summer fish species such as grass, cockroach, cockroach, and squid so as to solve the problem of large-scale fingerlings reared in the coming year. The general mu nests a summer flower of 3-5 cm long and has 1000-1500 tails, which can increase yield per mu. 30-50 kg of fish. Third, fish, crabs and other aquaculture waters will be placed in shrimp seedlings.
Fourth, strengthen management
The first is to regularly inspect the pond, observe the aquaculture animal's food, growth, shell and activities, etc., and find an exception to take timely measures. The second is the selection of palatable, nutritious and comprehensive high-quality bait, and reasonable feeding. Third, measures such as seedlings, food farms, tools, baits, fertilizer disinfection, and regular drug prevention measures should be adopted to prevent problems. The fourth is to do a good job in sanitation and prevent the harm of birds, rats and other predators. The fifth is to do a good job of preventing floods, preventing drought, preventing flight, and stealing, so as to ensure that every link is absolutely safe.
Fifth, reduce stress
Fish, shrimp, crabs and other aquatic animals will produce stress reactions. Stress response can inhibit the immune function of animals. The physiological function of farm animals that are often in stress state is more likely to infect the disease. Many intractable diseases that are difficult to cure are often the result of long-term stress response in production. In the process of aquaculture, due to dissolved oxygen, low pH, ammonia, nitrite, hydrogen sulfide and other water quality factors and breeding density, selection and feeding of food, diseases and prevention and control factors will cause stress response to aquatic animals.
Ways to reduce stress: 1. Strengthen water quality management. 2, feeding high-quality food. 3, timely arrest round. 4, scientific use of fishery drugs.
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