1, cultivation pond conditions: pond area of 50-300 square meters, the depth of water storage needs to reach 1 m, the bottom of the pond and the water surface needs to be placed in the concealment. 2, stocking density: shrimp fry can not be more than 1,000 density / square meter, appropriate thinning is conducive to improving the survival rate. 3, bait feeding: 3 days before the nursery splash steamed eggs + fish slurry, and then slowly switch to feed into the shrimp! Special opening bait and brine worms, feeding times for 3-5 times / day. 4, water quality control: let the water quality to keep fresh, remove the remaining bait in the pool in a timely manner, the length of young shrimp to reach 3 cm, the weight of 1 gram or so can be transferred to the adult shrimp pool.

First, how to raise Australian freshwater crayfish

1, cultivate shrimp fry

(1) cultivation pool conditions

① Cultivation of pools to enter the drainage of the more convenient cement pools are appropriate, the pool area needs to be 50-300 square meters, the depth of the water needs to be up to 1 meter.

② The bottom of the pool, the water surface should be placed in a hidden object, placed in an area of 1/4 of the bottom of the pool, 1/3 of the water surface, in order to increase the effective habitat area of shrimp seedlings.

(2) stocking density

① 4 weeks before the cultivation, the stocking density of the cultivation pool should not exceed 1000 per square meter.

② Appropriate thinning, timely sub-nutrition can improve the survival rate, under normal circumstances the survival rate can reach about 50-70%.

(3) bait feeding

① 3 days before the nursery, with steamed eggs + fish slurry sprinkled around the pond, and then gradually replaced with shrimp with open bait (crude protein content of 44-46%) and brine worms.

② bait 3-5 times a day, to be more than 2 cm shrimp specification can be fed granular bait, the amount of bait at this time for the storage of 15% of the body weight of the shrimp, but also according to the water temperature, young shrimp feeding and growth can be increased or decreased.

(4) water quality control

① Maintain fresh water quality and high transparency, if you can let the water flow slightly, it is more appropriate.

② Do not over bait, to avoid leftover bait and sedimentary waste in the pond.

③ Timely cleaning, when the size of the young shrimp to reach 3 cm, the weight of 1 gram or so, you need to transfer it to the adult shrimp pond.

④ If you want to ensure the survival rate, you can also continue to dilute in the juvenile shrimp tank, until the specification of shrimp fry more than 2 grams and then transferred to the adult shrimp tank.

2, cultivate adult shrimp

(1) pond conditions

① pond area of 1-1.5 acres, the depth of the pond water needs to be 1-1.5 meters, the bottom of the pond should be slightly sloped, to ensure that there is no seepage, the construction of good anti-escape facilities, and to increase the number of good oxygenation system, water intake and drainage system.

② Before stocking, 150-300 kilograms of quicklime per acre of pond to clear the pond, in order to prevent pathogens, hostile organisms survive in the pond.

③ Australian freshwater lobster prefer shade and fear of light, good at climbing and climbing to escape, the pond needs to be planted with aquatic plants (the area should be accounted for to the surface of the water 1 / 3), the bottom of the pond should be planted with rotifers and other aquatic grasses, and set up a burrowing place for them, such as bamboo tubes or other similar objects.

(2) shrimp fry placement

① spread quicklime after 7-10 days (toxicity disappeared, the water quality back to normal) began to release the seedlings, each acre of pond can be stocked with 7,000-10,000 tails, 30 days after the release of the seedlings each acre of pond can be mixed with 60-100 tails of silver chub (specifications for the 50-250 grams / tail).

② Freshwater lobster is a benthic crustacean, appropriate mixing of pelagic filter-feeding fish can improve its growth environment, at the same time, such fish are more sensitive to dissolved oxygen in the water, after stocking can also be used as a pond hypoxia indicator fish.

③ Note that you can not mix carnivorous fish and other predatory fish to prevent the growth of Australian freshwater crayfish.

(3) water quality management

① Let the pool water to maintain sufficient dissolved oxygen content, to ensure that the water quality is fresh, every day you can refill the pool water with new water, each time the amount of refill for 1/5-1/4.

② Splash lime water on time, which can improve the quality of the water, increase the quality of calcium, and help crayfish shelling, improve the survival rate.

(4) baiting management

① special bait for fish and shrimp as a diet, the daily feeding amount of 3-10% of the weight of the shrimp, the morning and evening of each day, respectively, fed once, of which the evening feeding needs to be accounted for to the total amount of feeding about 2/3 (Australian freshwater crayfish like to be close to the edge of the pool in the evening, night feeding).

② Australian freshwater lobster is omnivorous carrion food, so it is necessary to appropriately increase the amount of plant feed feeding, aquaculture can be put in the pool side of the hay in the early stage, the amount of grass for 40 kg / month, the later stage can be fed barley, soybean.

③ according to the water temperature to make appropriate adjustments to the amount of feeding, pre-water temperature is low, the lobster's feeding ability is weak, so you can reduce the amount of bait, in accordance with 6% of its body weight can be fed. High water temperatures in the middle, the lobster's appetite is more vigorous, this time according to 10% of its body weight for feeding, and then gradually adjust the bait rate to about 3% when the water temperature drops.

(5) shrimp disease control

① Australian freshwater lobsters are prone to? crayfish plague?

② When stocking shrimp and catching, make sure the water temperature is over 21℃ to avoid their disease.

(6) timely catch

① shrimp cage trapping, dry pond fishing as the main fishing method, for the adult shrimp ponds are not ready to overwintering, to be the water temperature drops to below 18 ℃ can be used in a dry pond harvesting method, fishing before the first pool of water, and then under the pond to collect shrimp can be, during the release of the water should pay attention to be set up in the mouth of the water net, to prevent the lobster with the flow of water down.

② If there is usually a small amount of fishing, you can use the shrimp cage trapping method, first woven with netting into an upright shape or cone-shaped shrimp cage (mesh size of 2 cm or so), and then put the bait into the cage and sunk into the pond, after a period of time you can get up to collect the shrimp cage.

③ In general, 5-6 months after the breeding of Australian freshwater crayfish mu production can reach about 70-110 kg, individual specifications can reach about 70-180 grams, the largest can reach about 450 grams.

Second, the Australian freshwater crayfish is green or blue

1, the color of the Australian freshwater crayfish varies depending on the species, the Maroon crayfish body color is generally bright blue, the four-ridged slippery crayfish (red chelid crayfish) is generally a light greenish green.

2, Australia's freshwater crayfish listing specifications for more than 100-200 grams, some individuals can reach 500 grams or so, its meat content rate of about 54%, thick meat, sweet taste.

3, Malone crayfish belongs to one of the world's largest freshwater crayfish species, its body length of more than 38 centimeters, the maximum weight of more than 2 kilograms.