Is the price of Australian freshwater lobster seedlings expensive? How to breed it?

Australian freshwater lobster, native to Australia. It is called freshwater lobster because it is large, looks like a lobster in the sea, and lives only in fresh water. The individual generally weighs 100-200 grams, and the largest individual can reach 500 grams. As early as the 1990s, Australian freshwater lobsters began to breed all over the world. However, due to insufficient promotion efforts, less investment, low survival rate of seedlings and other problems, especially due to the insufficient supply of seedlings, Australian freshwater lobster culture has not yet formed a large-scale in China. Is the price of Australian freshwater lobster seedlings expensive? How to breed it?

Is Australian freshwater lobster fry expensive?

In recent years, due to the unstable situation of shrimp culture in Thailand, many farmers intend to switch to Australian lobsters as edible shrimp species such as fishing farms and restaurant desks. People with businesses in Pingtung have released them on a large scale. The pool price is about NT $300-350 per jin (600 grams) (equivalent to about 60-70 yuan), and the price of shrimp seedlings is between 4-15 yuan (equivalent to about 0.8-3 yuan), depending on the size of different specifications.

Second, how to raise Australian freshwater lobster?

1. Pond conditions. Freshwater lobster likes the water environment with fresh water quality and rich dissolved oxygen, so it is necessary to choose places with sufficient water sources, no pollution sources and convenient injection and drainage. It is advisable to have an area of 2000,000m2. The bottom should be sandy or hard, and there should not be too much silt. The bottom of the pond should have not less than 1 kilo 5 area of submerged plants. Good intake and drainage facilities should be installed in the pond, and net cover should be set up at the inlet and outlet to prevent escape and enemy damage. Aquatic plants such as water grasses or water hyacinth and water hyacinth are kept around the pond, covering an area of about 1 / 3 of the water surface, and enough concealment is arranged at the bottom of the pond, such as artificial nests, stones, tiles and other hidden habitats for shrimp. The area is about 1 stroke 5 of the pond area.

2. Shrimp fry are released. Be sure to dry pond disinfection, in addition to sprinkling quicklime, but also thoroughly remove the enemy in the pond, such as catfish, Loach, snake, rats, etc., shrimp fry stocking time should be in 3mo-May, choose a sunny morning or evening, shrimp fry specification 2Mul 4cm, density of 800Mul 1000 per mu.

3. feeding with bait. The shrimp has a wide diet and likes to eat small miscellaneous fish, snails and soybeans, as well as shrimp compound feed. Within 3 days after stocking, minced fish and minced meat are mainly thrown, and within the following month, small mixed fish, scraps or artificial formula feed are put in. When the length reaches 6m / m ~ 7cm, all the minced snails, mussels and appropriate amount of plant bait can be fed. Feed once a day in the morning and once in the evening, accounting for about 4% of the body weight, 7% of the body weight, and the specific amount should be increased or decreased according to its food intake. Most of the feeding takes place at dusk and at night, and the amount of feeding at night accounts for more than 70% of the whole day.

4. Daily management. The water quality of the pond should always be kept fresh. Generally, the water needs to be changed every week, 15cm deep, and there is enough dissolved oxygen. Usually, we should inspect the pond frequently, patrol the pond frequently, remove the moss in the pond in time; often check the filter net of the inlet and outlet, but also pay attention to observe the various activities of shrimp, food intake and so on, and pay attention to the prevention and control of enemy damage.

5. Disease control. Since the shrimp was introduced into China, no fulminant and epidemic diseases have been found, but when the culture density is high, attention should be paid to disease control. One is brown spot. The carapace of the diseased shrimp has a speckled black-brown ulcer on the body surface and is often lying on the edge of the pool in a dying state. The prevention and control methods are mainly to maintain good water quality in shrimp ponds, regularly change water or put quicklime, and carry out pond desilting every year; careful operation should be taken in the process of fishing, transportation and stocking to prevent damage to shrimp shells; when disease is found, 1 mg / kg furacilin can be used to treat it, at the same time, 15 mg / kg tea meal can be used to promote shrimp molting and repair damaged carapace. The second is black Gill disease. The disease is mainly caused by water pollution and fungal infection. The symptom is that the gills change from red to brown or light brown until they become lambs completely, causing the gills to atrophy. The method of prevention and treatment is: kill it with 2MuthMel 3mg / kg furazolidone or bleach powder, or sprinkle it with malachite green or methyl blue 2mg / kg whole pool. The third is ciliosis. The disease is mainly ciliates such as condensed worms and bell worms attached to the body surface, appendages, eyes and gills of shrimp, which can make lobsters restless and swim frequently on the edge of the pool, hindering food intake, molting and growth. It can even cause the lobster to suffocate to death due to hypoxia. Generally speaking, fresh water can be infused to keep the pool water clean and prevent. Treatment can be treated with 0.40 mg / kg copper sulfate solution to wash diseased lobster 5murmuri for 6 hours, each course of treatment for 5 consecutive days.

6. Capture. Freshwater lobster can be harvested in November of the same year. Dry ponds or purse seine can be used for one-time fishing in the evening. If you want to be listed in stages and batches, you can cast a net.