Crayfish is native to Australia and is also known as Australian Freshwater Dragon. With the characteristics of large personality, complex food, fast growth, strong adaptability, good meat quality, high price, and exportability, it is comparable to seafood lobster.
First, biological characteristics. The shrimp can live in rivers, lakes, ponds, camp benthic, crawling, can survive in brackish water. Omnivorous, feeding on organic debris, aquatic plants, aquatic insects, small benthic animals, fermented cow dung, and artificial compound feed. The optimum water temperature is 22-32°C. Extreme water temperature 4°C and 37°C. When water quality deteriorates, it can climb away from the water to save itself. The larger individuals in the natural world are 500 grams. In the artificial breeding year, the seedlings can grow to 60-100 grams and the second-instar males can grow to 280 grams. It can breed naturally and spawn 1-2 times a year in the northern regions.
Second, shrimp farming. Single-cultivation and non-carnivorous fish polyculture, the pond area of ​​3-5 acres is better, the greater is not limited, the depth of 1-1.5 meters, the bottom of the brick, waste tires, mesh and other hidden objects, the appropriate planting water Gourds, water peanuts and other aquatic plants. In May and June, about 5,000 juveniles of 3 cm in size were stocked on a mu basis. Change water frequently to facilitate shelling. Ensuring that there is sufficient and nutritious bait, it is best to feed special compound feed. Adhere to the "four determinants" feeding, the amount of feed at night accounted for 70% -80% of the day, shrimp fed daily amount of 5% -10%. High-density farming should have aeration machinery. Fishing is generally 150 kilograms per mu in October. Micro-flow ponds produce up to 400-500 kilograms per mu.
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