Australian Freshwater Lobster Culture

Pond conditions: the water quality of the pond should be fresh and rich in dissolved oxygen. Shrimp fry stocking: dry pond disinfection before stocking, and thoroughly get rid of catfish, snakes and other enemies in the pond. Feed feed: feed small miscellaneous fish, snail, shrimp formula feed and so on. Daily management: change the water frequently, and check the pond frequently. Disease control: pay attention to brown spot and black Gill disease and other diseases, the emergence of diseases should be isolated and controlled in time.

I. Pond conditions

1. Freshwater lobsters like the water environment with fresh water quality and rich dissolved oxygen, so the pond should be in a place with sufficient water source, no pollution source and convenient injection and drainage.

2. The most suitable area of the pond is 2000-3300 square meters, the bottom of the pond should be sandy or hard, there should not be too much silt, and there should be no less than 1/5 submerged plants at the bottom of the pond.

3. In addition, good water intake and drainage facilities should be installed in the pond, and a net cover should be installed at the inlet and outlet. Water plants or aquatic plants such as water hyacinth and water floating lotus are raised around the pond.

2. Shrimp fry restocking

1. In addition to sprinkling quicklime, we must thoroughly clean up the enemies in the pond, such as catfish, snakes, and so on, before releasing shrimp seedlings.

2. The most suitable stocking time for shrimp fry is from March to May, and the sunny morning or evening should be chosen for stocking. The size of shrimp seedlings ranges from 2 cm to 4 cm. The density is 800-1000 per mu.

3. Feeding with bait

1. Australian freshwater lobster has a wide range of food habits, like small miscellaneous fish, snail and other feed, but also like shrimp formula feed.

2. Generally, minced fish and minced meat are mainly thrown within 3 days of seedling release, and small miscellaneous fish are put in the following month.

3. When the shrimp seedlings grow to 6-7 cm, they can all be fed with crushed snails, clams and appropriate amount of plant bait.

4. The feed should be fed once every morning and evening, accounting for about 4% of the body weight of Australian freshwater lobster. The specific amount of feed should be adjusted according to the feeding situation of Australian freshwater lobster.

5. Most of the Australian freshwater lobster is fed at dusk and at night, and the amount of feed put in at night accounts for more than 70% of the whole day's feed.

IV. Daily management

1. Australian freshwater lobster pond water quality should always be kept fresh, generally need to change water 15-20 cm deep every week, and there should be enough dissolved oxygen.

2. Usually, we should inspect and patrol the pond frequently, clean up the moss in the pond in time, observe the various activities and feeding of Australian freshwater lobster, and pay attention to the prevention and control of enemy damage.

V. Disease prevention and control

Since Australian freshwater lobster was introduced into China, fulminant and epidemic diseases have not been found, but when the culture density is high, we should also pay attention to disease control.

1. Brown spot

The main results are as follows: (1) the main manifestation of brown spot disease is that there are spotted black-brown ulcers on the body surface of diseased shrimp, often lying on the edge of the pool in a dying state. (2) Prevention and control methods, mainly to maintain good water quality of shrimp ponds, regularly change water or put quicklime, and carry out pond desilting every year; be careful in the process of fishing, transportation and stocking to prevent damage to shrimp shells; if Australian freshwater lobster disease is found, 1 mg / kg furacilin can be used to treat it, at the same time, 10 15 mg / kg tea meal liquid can be used to promote shrimp molting and repair the damaged carapace.

2. Black Gill disease

(1) 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.

(2) the control method is to kill with 2Mel 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 for 6 hours, each course of treatment for 5 consecutive days.