Construction of farmed lobsters, how to farmed lobsters

a) Breeding facilities.

Existing giant river prawn hatcheries or shrimp hatcheries with sufficient fresh water** can be slightly modified for freshwater crayfish breeding; It is also possible to build a special crayfish breeding farm. Whether it is a renovation or a new breeding farm, it is necessary to consider:

1. Site selection.

The breeding site should be determined according to the scale of production, requiring sufficient water sources, good water quality, convenient drainage and irrigation, fresh air, quiet environment, free from natural and man-made interference, and realizing "three links" (access, electricity, communication).

2. Pool construction.

Breeding facilities need to be built with the following types of pools:

1) Broodstock ponds. For breeding and stockpiling broodstock, the general area of each pond is 60 80 square meters, large-scale production, the area can be hundreds of square meters, the water body is large, the water quality is more stable, and the cultivation effect is also good.

2) Spawning pools. Each pond area is 30 60 square meters, as broodstock spawning and fertilization, to facilitate drainage and irrigation, is conducive to the detection of shrimp holding eggs.

3) Incubation and nursery ponds. It should be smaller, with an area of 4 6 square meters per pool, which is convenient for water exchange, inspection and management, and hatching seedlings in batches.

4) Feed pools. Each pond has an area of 20 30 square meters and is used for the cultivation of small zooplankton.

3. Construction requirements.

Above the depth of the pool, install adjustable drainage pipes, and install anti-escape facilities. The bottom of the pool is preferably sandy loam, or the cement bottom is covered with 10 15 cm thick medium sand. The pool wall is plastered with cement outside the brickwork, and the eaves on the top of the bank are out to prevent escape.

The frame is embedded in the pool, which is convenient for laying the shade net into a plastic film shed. At the bottom of the pond, there are enough bamboo tubes and tile pipes for the shrimp to hide, and several bamboo chips are set up to double as a feed table. The water surface of the pond is 1 3 to cultivate water floating lotus, and some aquatic plants are planted at the bottom of the pond as much as possible.

References.

If you want to raise lobsters well, you must prepare a suitable living environment to prevent lobsters from escaping, and fertilize the shrimp pond to control the amount.

The selection of pond water source requires fresh water quality, sufficient dissolved oxygen, and no pollution. Loam clay is better, the width of the pond ridge is more than 3 meters, the slope is 1, the water depth is meters, the pH value is, the pond area should not be too large, generally 3 8 acres is appropriate, rectangular, east-west.

When pouring new water into the pool, it should be filtered with 20 to 40 mesh gauze to prevent wild trash fish and fish eggs from entering the pool with the current. In accordance with the pattern of high irrigation and low drainage, build drainage canals to achieve irrigation and drainage. Crayfish have a strong ability to escape, so it is necessary to do a good job in the construction of anti-escape facilities.

Usually use plastic film, mesh, calcium-plastic board or cement board to erect anti-escape facilities along the perimeter of the pond ridge to prevent the entry of predators and the escape of crayfish.

Pond cleaning and disinfection can effectively kill predators (catfish, loaches, snakeheads, snakes, rats, etc.) in the pond, wild miscellaneous fish (carp, crucian carp, etc.) competing for food, and pathogens. Quicklime and bleaching powder can be used, which is economical, affordable and safe.

The specific operation method is as follows:1Quicklime disinfection.

Dry disinfection: 70 kg of quicklime per mu, splashing the whole pool of chemical water, and then using a nail rake to hug it if possible, and inject new water after a week of drying the pond; Water disinfection: Each mu of water surface is calculated according to the water depth of 1 meter, and 130 kg of quicklime is dissolved in water, and the whole pool is evenly sprinkled.

2.Bleach sterilization. After the bleach containing 30% available chlorine is completely dissolved, the whole pool is evenly sprinkled, and the dosage is 25 kg per mu.

Planting aquatic plants "Lobsters are good or not, whether there is grass in the pond or not." The lobster is not big, and the grass in the pond is dominant. "Aquatic weeds, in lobster farming, occupy a pivotal position, the first aquatic weed can fill the lobster bait intake insufficiency, supplement a large number of vitamins; second, it can prevent wind and waves, absorb some harmful substances in the water body, purify water quality, and balance the water environment; Third, it can provide shelter and habitat for juvenile shrimp and shelled shrimp, and reduce bullying the weak with the strong.

Generally, it is advisable for the planting area of aquatic plants to account for half of the total area of the pond. Varieties are available: low-stem reed, cocoon, elophylla, black algae, etc.

If conditions permit, you can also put some empty cans, bamboo tubes, tree roots and other wastes at the bottom of the water body, which are the favorite habitats of crayfish.

What are the methods of fertilizing crayfish in shrimp ponds? Some people think that it doesn't matter whether the pond where lobsters are farmed is fertilized or not, in fact, applying an appropriate amount of organic fertilizer to the shrimp pond after lobster stocking can provide natural bait directly for shrimp after entering the pond. 400 kg of fermented organic fertilizer is selected to maintain the corresponding fertility of the pool water.

In the process of feeding, with the gradual deepening of the water level, it is necessary to apply decomposed organic fertilizer, and the choice of amount and time depends on the fat and thinness of the water, generally not more than 80 kg each time. The transparency of the pool water is maintained at about 35 cm.

Before the arrival of the rainy season, the dosage should be accurately calculated with strong chlorine) and the whole pool should be sprinkled after the water is melted.

Under normal breeding conditions, quicklime is used once every half a month to 1 time every 10 days, and 10ppm 20ppm is used depending on the water quality, and the whole pool is splashed with chemical water.

If you want to raise lobsters well, you must be careful.

1. Breeding facilities: Breeding lobsters should be built with an area of 4-10 acres and a water depth of meters, and protective nets should be installed around them. 2. Stocking preparation:

The pond is disinfected with bleaching powder, and then algae, aquatic weeds are planted to cultivate plankton. 3. Feeding management: feeding twice a day from July to October every year, and feeding once a day at night in the rest of the season.

1. Breeding facilities

Breeding lobsters should build ponds with flat bottoms, good water storage and sufficient water sources, with an area of 4-10 acres, and the water depth should be kept in the range of 1 meter to meters, and during the breeding period, plastic film should be used to build protective nets along the edge of the pond to avoid lobsters escaping.

2. Stocking preparation:

One month before stocking lobsters, the water in the pond should be drained, the excess silt should be removed, and then the pond should be disinfected with bleaching powder, and then the rotten farmhouse fertilizer should be applied to it to cultivate plankton, and algae and aquatic plants should be planted at the bottom of the pond to provide a place for the lobsters to hide, rest and molt.

3. Feeding management

Lobster eating is more miscellaneous, in the process of breeding, you can be fed twice a day between July and October every year, mainly fish, snail meat, shrimp meat, watermelon, so that it can consume enough nutrients, and the rest of the season should be fed once a day, and it is best to feed at night, so that the amount of lobster food increases.

Long-term lobsters must be raised with unpolluted water in the natural environment, and they also need to be fed and filtered every three or five times.

If short-term (should not exceed two days) to keep alive, you can use unpolluted clean water in the natural environment to uninterrupted mist drenching, spread out, preferably less than 2 kg per square, you can use a shelf, put a tray with leaky holes and drainage, layer by layer, water must be filtered before recycling.

Remember: do not dry put, because the lobster is too small, the dry water is easy to evaporate, resulting in crayfish dehydration and death. It is also not allowed to be intensively potted, because it is intensively potted; （1.

Water is susceptible to death due to lack of oxygen. 2.Lobsters excrete their own excretion, which is easy to pollute water quality and cause death.

3.Lobsters will eat each other to death. ）

If you use a glass tank, it will be better to add oxygen; However, it is necessary to have unpolluted clean water in the natural environment, and change the water frequently, no less than twice a day, and should not be too dense. (It is recommended that you use the rinsing method).

Basic lobster breeding methods:

1.Buy a fish tank or aquarium, preferably glass, so that you can clearly see the lobster's every move. Get a lid to prevent the lobster from jumping out of the tank.

Spread a layer of sand and put some small pebbles to simulate the natural environment more realistically, so that the lobster can adapt to life in the fish tank. Don't bask in the sun, lobsters are yin.

2.Crayfish are omnivorous and can be eaten on both plant-based and animal-based feeds. Plant-based feed.

Plant-based feeds include plant straw, aquatic weeds, roots and leaves of aquatic plants, cohetic algae, silk algae, organic detritus, etc. Animal feeds include aquatic insects and screws, mussels, fish, etc.

3.It is best to keep several lobsters together, so that the survival rate of lobsters is relatively high.

4.When lobsters are shedding, they should be kept separately to prevent lobsters from killing each other.

5.To help the lobster bathe and prevent parasites. Pinch the carapace of the lobster and scrub the lobster's body with a toothbrush, especially the dead spots. Don't push too hard.

Lobster farming methods include controlling the water level, feeding at the right time, removing moss in time, starting food early, and daily management.

1. Control the water level

When it is sunny, the pool water is controlled at about 30 to 50 cm, and if there is continuous rainy weather, the water level should be deepened appropriately to prevent the water environment in the pool from changing greatly.

2. Cast bait at the right time

When the water temperature reaches 10, the crayfish begin to feed, and the bait can be appropriately fed, and the amount of bait is generally controlled at about 2% of the body weight of the juvenile shrimp. The bait is mainly concentrate, supplemented by 15% roughage, and the moldy feed shall not be fed.

3. Remove moss in time

When a small amount of moss appears, the tomato can be removed manually or the water depth can be increased. If a large amount of moss appears, it is recommended to use a moss net drug to kill it, but avoid the shelling period of crayfish. After killing, it can be cleaned up with water protection and detoxification to clean up drug residues and keep the water quality good.

4. Start eating early

In early spring, the shrimp is relatively weak, and can usually be fed with compound feed with high protein content, and appropriately matched with some fresh trash fish, snails, etc., to meet the growth needs of young shrimp. Take advantage of the fine weather, and feed crayfish pellets with more than 35% crude protein at intervals of 2 to 3 days, small trash fish, corn, soybeans, etc.

5. Daily management

It is necessary to insist on patrolling the pond once a day in the morning and evening, carefully observe the activities, growth, and feeding of crayfish, pay attention to the changes in water color and water quality, and deal with abnormal situations in time. After a heavy storm and rain, it should be drained in time, and the anti-escape facilities should be checked and strengthened to prevent crayfish from escaping.

Hello, dear, breeding ecological crayfish, 1, breeding crayfish to rebuild the old rice field, and remove the silt and debris in it, and then install fences and fine nets to avoid crayfish escape. 2. When the weather is sunny and cool, pour the shrimp seedlings into the rice field. 3. During the growth period of crayfish, high-protein foods such as animal offal should be put into it.

4. Regularly inspect the paddy field and replace the water in time to avoid crayfish disease. 2. Put shrimp seeds before putting shrimp seeds, you need to pour some fertilizer into the shrimp pond, and wait until the pond water becomes yellow and green and clear, you can plant algae and wait for the population of zooplankton to multiply and grow, and then pour shrimp seedlings into it, pay attention to choose to dump when the weather is sunny and cool, and pour about 40 kg of shrimp seedlings per acre of field. 3. Feeding bait crayfish in the juvenile period because of the small size, mainly to feed on plankton and algae detritus in the water body, and wait until its body size gradually grows up, you can prey on some benthic aquatic animals, for which the bait is fed with high egg orange and white matter food-based, you can put animal offal, pay attention to the timing and fixed point quantitative delivery.

4. When regularly inspecting the breeding of crayfish, we must pay attention to the regular inspection of the pond, especially when it rains, the water level is **, the lobster may escape, in order to avoid unnecessary losses, the fence should be strengthened in time, and the model group should adjust the water quality according to the situation of the shrimp group to replace the new water, or feed the operation of medicine to prevent disease.

The market price of crayfish has been high and the supply exceeds demand, so it is very profitable to farm crayfish.

Breeding: The pond should be rectangular, with an area of 1334 3335 square meters, and the water depth should be about meters.

The bottom of the pool is hard soil or sandy, without silt, and the pool wall must have a certain slope.

The pond should have a good drainage and irrigation system, with water entering the upper part at one end and draining water at the bottom at the other end, and the inlet and drainage outlets should have anti-enemy and anti-escape net covers.

There should be an appropriate area of submerged plant area at the bottom of the pond, and there should be enough artificial concealment, such as waste tires, mesh, bamboo rafts, etc., for lobsters to hide and perch.

Conditional ponds can be equipped with aerators.

The pond should be disinfected before stocking shrimp seedlings, if it is a new shrimp pond, quicklime can be used to clear the pond, if it is an old fish pond breeding, it must be disinfected in the dry pond, in addition to splashing quicklime, it is necessary to completely remove the loach, catfish, black fish and snakes, rats and other predatory predators in the pond.

1. Crayfish (scientific name: Procambarus clarkii):

Also known as crayfish, crayfish, and freshwater crayfish. resembles a shrimp with a hard carapace;

adult about centimeters long, dark red, carapace nearly black, with a wedge-shaped stripe on the dorsal surface of the abdomen;

Juvenile shrimp are uniformly grey, sometimes with black ripples. Chelicera elongated. The middle of the carapace is not separated by mesh-like voids, and there are obvious particles on the carapace.

2. Nutritional value:

Crayfish is rich in nutrients, and its meat is soft and easy to digest, which is an excellent food for people who are weak and need to recuperate after illness;

Crayfish is rich in magnesium, magnesium has an important role in regulating heart activity, can protect the cardiovascular system, it can reduce blood cholesterol content, prevent arteriosclerosis, and at the same time can dilate coronary arteries, which is conducive to preventing hypertension and myocardial infarction;

Crayfish has a strong lactation effect, and is rich in phosphorus and calcium, especially for children and pregnant women;

Scientists at Osaka University in Japan recently discovered that astaxanthin in shrimp helps eliminate "jet lag" caused by jet lag.