A. Shrimp pond construction The cultured freshwater lobster pond should be constructed in a place with good ventilation, quiet environment, convenient drainage and irrigation, and no water pollution. The shrimp pond is preferably rectangular, with an area of ​​5 to 10 mu and a water depth of about 1.5 meters. The bottom of the pool is a sandy bottom and is flat. The entire shrimp pond requires no water leakage. The inlet and outlet of the shrimp pond should be equipped with a filtration net to prevent the entrance of wild fish and other predator organisms. There must be 50-cm high anti-escape facilities around the pool wall. The water plants such as water hyacinths, water hyacinths, and water hyacinths should be stocked in the pool. The water grass cover is generally not less than 1/3 of the surface of the shrimp pond. At the bottom of the pool, a certain amount of stones, tiles and other shelters should be placed, or 30 to 50 old tires should be placed on the surface of the water for the lobster to avoid hiding.
B. Disinfection of clear ponds In general, newly constructed shrimp ponds can be supplied with quicklime water to clean the ponds. The amount of water used per mu is 100 kg. If there is moss in the pond, use 0.25 kg of copper sulfate per acre to spray in a place with moss. If the old fish ponds are used for raising shrimp, dry ponds must be sterilized. In addition to spilling life ash, they must thoroughly remove predators, eel, blackfish, snakes and rats.
C. 10 to 15 days before feeding the bait, put about 200 kg of decomposed organic fertilizer per mu of shrimp pond, cultivate “red worms†to ensure that the shrimp seedlings have sufficient palatability feed.
D, shrimp seedlings stocking shrimp should be selected sunny morning or evening. Before releasing the seedlings, use a small amount of water to gradually adjust the water temperature in the container for transporting the seedlings until the water temperature in the container approaches the pool water temperature, and then add the shrimps to the pool to prevent the shrimps from “cold†and affect the survival rate and growth. The stocking size of shrimps is generally 3 to 5 cm, and the stocking density is 5000 to 6000 mu. If the shrimps are small, the stocking capacity can be increased appropriately. The specifications of shrimps stocked in the same pond need to be neat and consistent.
E. After 3 days of putting the seedlings scientifically, the red worm in the pond was used to supplement the minced fish and minced meat; then the small trash fish, legged meat and artificial compound feed for about 1 month were used; When it is 6 to 7 centimeters in length, it can be fed with crushed snails, coriander, and appropriate amount of vegetable feed. The daily feeding amount is full, eaten, and no residual bait is left. Generally, medium and small shrimps are fed at 15% to 25% of body weight, and adult shrimp is fed at 5% to 10% of body weight. Every day, night and evening, each feeding 1 night, 70% to 80% of the total daily feeding, feed should be cast in the shallow water of the pond.
F. Shrimp pool management Due to the rapid growth of Australian freshwater lobsters, high metabolism and high oxygen consumption, shrimp pond water quality should always be kept fresh. Generally, 15 to 20 centimeters of water is added every week. The water quality is alive and cool, and there is enough dissolved oxygen. The transparency is controlled at about 35 cm. In day-to-day management, diligently inspect and diligently inspect the ponds, promptly remove the moss in the pool, and frequently check the strainers entering the water outlets to prevent the escape of the shrimps and the invasion of wild fish and other harmful creatures into the filter nets. When encounter thunderstorms and sweltering days In order to reduce or stop feeding, even when the weather is cloudy, even when the weather is too hot and cold, pool water should be properly deepened to stabilize the water temperature. At the same time, observations of freshwater lobster’s feeding and activity growth, and shelling should always be observed.
G, timely harvest Australian freshwater lobster year of stocking, the harvest that year, generally can be used as a shrimp dry pond or seine fishing. If they are listed in batches in stages, they can be caught by trawls or scatter nets, or traps can be used, ie bait can be placed in cages and shrimp can not be returned. All fishing processes should be completed before the water temperature drops to 5°C.
B. Disinfection of clear ponds In general, newly constructed shrimp ponds can be supplied with quicklime water to clean the ponds. The amount of water used per mu is 100 kg. If there is moss in the pond, use 0.25 kg of copper sulfate per acre to spray in a place with moss. If the old fish ponds are used for raising shrimp, dry ponds must be sterilized. In addition to spilling life ash, they must thoroughly remove predators, eel, blackfish, snakes and rats.
C. 10 to 15 days before feeding the bait, put about 200 kg of decomposed organic fertilizer per mu of shrimp pond, cultivate “red worms†to ensure that the shrimp seedlings have sufficient palatability feed.
D, shrimp seedlings stocking shrimp should be selected sunny morning or evening. Before releasing the seedlings, use a small amount of water to gradually adjust the water temperature in the container for transporting the seedlings until the water temperature in the container approaches the pool water temperature, and then add the shrimps to the pool to prevent the shrimps from “cold†and affect the survival rate and growth. The stocking size of shrimps is generally 3 to 5 cm, and the stocking density is 5000 to 6000 mu. If the shrimps are small, the stocking capacity can be increased appropriately. The specifications of shrimps stocked in the same pond need to be neat and consistent.
E. After 3 days of putting the seedlings scientifically, the red worm in the pond was used to supplement the minced fish and minced meat; then the small trash fish, legged meat and artificial compound feed for about 1 month were used; When it is 6 to 7 centimeters in length, it can be fed with crushed snails, coriander, and appropriate amount of vegetable feed. The daily feeding amount is full, eaten, and no residual bait is left. Generally, medium and small shrimps are fed at 15% to 25% of body weight, and adult shrimp is fed at 5% to 10% of body weight. Every day, night and evening, each feeding 1 night, 70% to 80% of the total daily feeding, feed should be cast in the shallow water of the pond.
F. Shrimp pool management Due to the rapid growth of Australian freshwater lobsters, high metabolism and high oxygen consumption, shrimp pond water quality should always be kept fresh. Generally, 15 to 20 centimeters of water is added every week. The water quality is alive and cool, and there is enough dissolved oxygen. The transparency is controlled at about 35 cm. In day-to-day management, diligently inspect and diligently inspect the ponds, promptly remove the moss in the pool, and frequently check the strainers entering the water outlets to prevent the escape of the shrimps and the invasion of wild fish and other harmful creatures into the filter nets. When encounter thunderstorms and sweltering days In order to reduce or stop feeding, even when the weather is cloudy, even when the weather is too hot and cold, pool water should be properly deepened to stabilize the water temperature. At the same time, observations of freshwater lobster’s feeding and activity growth, and shelling should always be observed.
G, timely harvest Australian freshwater lobster year of stocking, the harvest that year, generally can be used as a shrimp dry pond or seine fishing. If they are listed in batches in stages, they can be caught by trawls or scatter nets, or traps can be used, ie bait can be placed in cages and shrimp can not be returned. All fishing processes should be completed before the water temperature drops to 5°C.
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