Australian lobster culture technology

After the breeding technology has gradually matured, it is no longer impossible to raise precious Australian lobsters. In fact, many parts of China are very suitable for Australian lobster farming, because the climate of those areas is very similar to that of Australia, which belongs to subtropical climate, and a few of them belong to tropical climate.

Australian lobster culture technology

First, the suitable growth rate. Australian lobsters are naturally distributed in subtropics and tropics. A better growth rate can be obtained between 18 ℃ and 32 ℃.

Second, water quality requirements.

① water source mainly takes the surface water of unpolluted rivers, lakes, reservoirs and other large water bodies as the water source. Groundwater can also be used, which has the following advantages: a fixed and independent source of water; wild fish without pathogens. No pollution. The temperature is relatively stable throughout the year.

In the process of culture, the pH value of ② water had a lowest value of 6.10 and a maximum value of 9.33, but 6.5 Mel 9.0 was better, and it was better to be neutral.

③ water dissolved oxygen, Australian lobster can survive for a short time, although it is resistant to hypoxia and dissolved oxygen is less than 1 mg / L, but if it is in a state of low dissolved oxygen for a long time, it will affect its growth and survival rate. Therefore, if necessary, the pond should be equipped with aerator or other oxygenating equipment to keep the dissolved oxygen above 4 mg / L, so as to avoid the pollution of heavy metals, pesticides, herbicides, oil, chlorine, methane, argon sulfide, high iron content and so on.

④ cultured in micro-running water or adding new water regularly can promote the growth of lobster.

Third, pond conditions.

The ① pond should be rectangular and unlimited in area, but it is better to use 2mi 5 mu, with a water depth of 0.9 mi 1.5 m, and the direction of the pond's long axis should be the same as that of the summer wind.

② pool bottom hard soil, no silt, pool wall must have a slope, and the slope should be greater than 3 ∶ 1.

③ ponds should have a good drainage and irrigation system, with water entering the upper part of the pond and drainage at the bottom of the pond at the other end, and the inlet and outlet should be protected against enemy and escape nets.

The bottom of the ④ pond should have a submerged plant area with an area of about 1pm and 5 bottoms, and there should be sufficient artificial concealment, such as waste tires, nets, PVC pipes, waste tile tanks, bamboo rafts and so on. ⑤ conditional ponds can be equipped with aerator.

Fourth, stocking technology and daily management.

① density: 600 young prawns of 3cm per mu can be properly mixed with 100 silver carp, 50 flower silver carp and 50 grass carp.

② microaquaculture or adding 2 Mel fresh water three times a week.

③ feeding should be fixed-point, fixed-time, qualitative and quantitative, and the types of feeding should be diversified as far as possible, such as water hyacinth, water lotus, parsley and other aquatic plants, cow dung, pig manure, artificial pellet feed. It can also be fed properly with animal erbium materials such as snails, earthworms, mussels, etc. Feed mellow cow dung once a week, 100 kg per mu, in the four corners of the pond, all submerged into the water, feed pellet feed once a day, and 20% of shrimp body weight at 6 pm.

During the high temperature period of ④ in summer, attention should be paid to increasing the amount of water flow or water injection, and the times of water injection, and the aerator can be turned on at night.

Disease prevention and control of Australian lobster

The breeding stage of parent shrimp should be waterproof against the attack of rats, water snakes, frogs and the attachment of ciliates such as cumulus, constrictor, bell worm and so on. The seedling stage should also prevent the harm of aquatic insects and larvae. Therefore, we must pay attention to the disinfection and cleaning of the pool before feeding, take certain preventive measures and strengthen the feeding management. Red crayfish is easy to infect crayfish, and it is also easy to suffer from a disease caused by fungi called "crayfish plague". As long as the water temperature during stocking and fishing is above 21 ℃, the occurrence of crayfish plague can be avoided. In addition, it can be exchanged regularly per 10d1: quicklime 20mg / L, copper sulfate plus ferrous sulfate 0. 5%. 7mg / L, furazolidone 1~2mg / L and rhubarb 4 ~ 5mg / L were sprinkled in the whole pool to prevent the disease.

The slaughtering method of Australian lobster

1. First press and hold the shrimp head with a towel, and then pee in the urethra before poking the tail with chopsticks. If you don't pee alive, it will smell a little smelly.

2. Stun the lobster head with the handle of the knife.

3. Take gloves or two towels to protect your hands respectively, then hold the lobster head with your left hand and the lobster tail with your right hand, pick up the lobster, twist and pull the lobster in the opposite direction at the same time, and then the lobster head and lobster tail are separated. Keep in mind that it is best not to use a knife to divide the lobster head and tail.

The difference between Australian lobster and ordinary lobster

The lobsters we can eat usually belong to "Animal kingdom > Arthropod phylum > soft Nail > Decapoda", and further down is the main difference. Generally speaking, Australian lobster and California lobster belong to the "unclaw order > lobster family", so strictly speaking, they are lobsters. Maine lobster and freshwater lobster belong to "crayfish order > marine crayfish / crayfish family", and their scientific name should be crayfish / crayfish. Crayfish is often regarded as a kind of lobster because it is similar in size to lobster and both are edible. In terms of scientific classification:

Lobsters have long, thick, prickly antennae, while crayfish have thinner and shorter antennae. Crayfish have a pair of large claws (pliers), while lobsters have no claws. Crayfish are actually small relatives of sea crayfish living in fresh water, but they are a little away from the real lobster.

It turns out that Australian lobster is the true sense of lobster, and we usually eat the most common freshwater shrimp is sea lobster. It seems that people are not very clear about the difference between the two. It was only today that the editor knew that this was a big misunderstanding. fortunately, now that everyone knows about it, we can tell them apart in the future.