Artificial breeding of crayfish in Australia

The artificial breeding of freshwater crayfish in Australia has been recognized by the aquaculture experts as one of the easiest and most expensive rare shrimps in the world due to its unique ecological characteristics. Today's development proves that the artificial breeding of crayfish is of great commercial value and market. The countries of the world highly praised that artificial breeding was initiated in Australia in 1985. China was introduced in 1990. It succeeded in 1992. With the further reduction of shrimp seedling price (1.3cm-3cm in 1993 was 2.4 yuan), breeding The scale has been initially formed. In the international market, the red-chew crayfish are restricted by the Australian authorities for export. The export volume is controlled within 30% of the total output. The commodity shrimp is far from meeting the market demand. The price is stable and high. Become a very competitive breed! Product shrimp culture Australia's freshwater crayfish artificial breeding technology requirements are low, do not require greater difficulty, as long as a bit of aquatic knowledge of the staff can easily grasp grasping our studio for many years the actual breeding The accumulation of operating conditions and knowledge will share key technical points and high-yield experience in the breeding process with the majority of farmers. Pond condition water source: good water quality, abundant water source, convenient drainage and irrigation. At the bottom of the pool: Stop holes at the bottom of the pond to prevent leaking shrimp. Breeding clear pond preparation: drain the pond water, make up for leaks. Conditional drying pond for a few days. Disinfection: Method » A After quicklime is added with hydration powder, the whole pool is splashed with dosage of 30-60kg per acre of quicklime and sprinkled with water in a place with water (if there is no stagnant water) B This method is suitable for ponds After the water is used, the quicklime and theophylline are put into water and dissolved, the whole pool is splashed, the amount of quick lime is 50--80kg, and theophylline is 10--15kg. C. Water: Whenever new water is injected, it must be Use a 60- to 100-mesh mesh to prevent wild fish from entering the pond and affecting the survival rate of the shrimp. D Planting plants: Plants are the ideal spot for Australian freshwater crayfish to hide, inhabit, and peel. Aquatic plants can purify water, Reduce the body's fatness, increase transparency, and make the water environment fresh. At the same time, in the breeding process, it may happen that the feed is insufficient. The water grass can also be used as a feed for lobster. In practice, planting the water grass can improve the lobster's order. The important conditions for the production and output of high quality commercial shrimp. Aquatic grasses are widely distributed throughout the country. First, 10 cm of water is injected into the pond, and water plants are planted at the bottom of the pond. Each branch is 1.5 to 2 meters apart, and water injection is sufficient. Since water grass grows quickly, it is generally associated with investment. Little relationship. Cast seedlings breeding density: 7-10 days after disinfection can be put seedlings, the density of 4000 - 6000 per acre. Shrimp: Select the strong seedling activity, relatively uniform specifications of the shrimp, stocking temperatures are not low At 12C, the larger the shrimp size, the higher the survival rate. Feeding: 1.5--3cm shrimp seedlings are fed with peanut slag in the early stage. A month later, commercially available artificial compound feeds can be fed. Manually formulated feeds are added directly above 3cm. The main task of aquaculture management is to feed materials. Note for water, anti-loopholes, quicklime disinfection. Feeding materials: Australia's freshwater crayfish can grow very well with little food intake, and the amount of shrimp fed is 1.5%--2% of the shrimp weight. 1.3cm-3cm shrimp seedlings are fed with peanuts, more than 3cm Feeding artificial compound feed. Feeding time is generally at dusk, once a day. The two effects are better, the early morning is 30% of the total amount of the Japanese investment, and the evening is 70% of the total amount of the Japanese investment. Pay attention to the climate, water temperature, adjust the investment appropriately. Feeding amount. Changing water: Regular injection of fresh water can improve the water environment and increase dissolved oxygen to promote the growth of shrimp. There is no strict requirement for changing the amount of water. Change water as much as possible during the day. Prevent loopholes: usually check more if the loopholes around the pond, if found Immediately repair the leaking hole, be sure to pay attention! Disinfection: splash the whole pond with water-soluble lime, greatly shorten the time interval between shelling and promote the rapid growth of shrimp, the effect is very obvious. There are sedimentary pollutants, water purification, improve the growth of lobster The role of the growing environment. The artificial breeding of freshwater crayfish in Australia can seize the above points, and it can certainly achieve high yields and produce high-quality Australian freshwater crayfish. High-density breeding (10,000-15,000 tails per acre) can be equipped with an increase machine.

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