How to properly farm freshwater crayfish?

Aquaculture facilities The pond area is 4 10 acres, 1 meter deep, and the slope ratio is 1. The bottom of the pond is flat, the bottom quality is loam, the soil of the pond slope is hard, the pond has good water retention, and the water level is easy to regulate. The water source is sufficient, and the water quality is pollution-free.

In accordance with the pattern of high irrigation and low drainage, build drainage canals to achieve irrigation and drainage. Crayfish have a relatively strong ability to escape, and it is necessary to do a good job in the construction of anti-escape facilities. Usually plastic film or calcium-plastic board is used to support bamboo or wooden stakes along the ridge of the pond to prevent escape.

Preparation before stocking Thoroughly clean and disinfect the shrimp seedlings 20 to 30 days before stocking, drain the pond water, remove excessive silt, and renovate the pond ridge. Apply sufficient basal fertilizer to apply 500 600 kg of decomposed livestock and poultry manure per mu, cultivate rotifers, cladopods and copepod plankton, and provide palatable bait for shrimp seedlings and shrimp species. Aquatic plants such as black algae, malayan eyeweed, and elophyllum are planted in the aquatic plant pond, accounting for 2 3 of the shrimp pond area.

At the same time, set up mesh, or set up bamboo tubes, plastic tubes, etc., to provide habitat, molting, and hiding places for crayfish.

Scientifically fed crayfish with crayfish has a miscellaneous diet and is relatively gluttonous. In terms of feed feeding, grasp the following points. According to the nutritional needs of crayfish at the same growth stage, do a good job in the combination and feeding of feed.

In the juvenile and juvenile stages of crayfish, crayfish feed on rotifers, cladopods, copepods and larvae of aquatic insects, while in the adult stage, they feed on both animal feed and plant feed. After the stocking of shrimp seedlings and shrimp seeds, fertilizer should be applied in a timely manner to fertilize the water quality. In the rapid growth stage of crayfish in August and October, feed more bran, soybean cake and green feed, and feed animal feed appropriately.

11 Before wintering in December, crayfish are mainly fed with animal feed.

Freshwater crayfish farming methods are as follows:

Tools: crayfish shrimp seedlings, quicklime, aquatic plants, silver carp.

1. Water body selection, freshwater lobster has strong vitality, not only can use ponds, rice fields, pits in front of and behind the house to clear pond breeding, but also can use some barren water and barren beaches and suitable fishing wasteland that are not suitable for cultivation and aquaculture.

2. Water treatment, every 667 square meters of the pond with 10 to 15 kg of quicklime sterilization and disinfection, the breeding process should pay attention to the control of relevant water quality standards.

3. Transplant aquatic plants, freshwater lobsters like shade, you can plant water peanuts and ryegrass next to it, and plant an appropriate amount of water hyacinth and water spinach on the water surface, and plant goldfish and algae in the water.

4. Shrimp seedlings are put in, generally per 667 square meters of mountain such as square meters of water surface to put 40 to 60 kg of egg shrimp or 80 to 120 kg of juvenile shrimp, bait feeding, freshwater crayfish are omnivorous, like to eat plant feed such as fresh aquatic plants, water spinach, etc.

5. Water quality management, 50 to 100 silver carp can be put into every 667 square meters to regulate water quality.

Crayfish like the ones we eat generally belong to freshwater lobsters, especially in summer, which are very popular with consumers, so in recent years, more and more people have farmed freshwater lobsters. ThatWhat are the key points of freshwater lobster farming? Is there a prospect?

1. What are the key points of freshwater lobster farming?

1. Select Tangkou.

The area of the pond mouth of breeding crayfish should be moderate, generally in 20 acres and 50 acres. The pond slope ratio is larger, in 1, which is convenient for crayfish to burrow and reproduce, and can reduce the escape of crayfish at the same time. The pond is rich in natural bait organisms and aquatic plants.

2. The water quality should meet the requirements.

Freshwater crayfish have strong adaptability, and the pH value of the water can survive within the range, but it is advisable to be neutral and alkaline, so as to facilitate the rapid growth of lobsters. Although freshwater lobsters are tolerant to low oxygen, if they are in a state of low dissolved oxygen for a long time, it will affect their growth rate and survival rate. It should also avoid water pollution by heavy metals, pesticides, herbicides, oil, methane and other substances, and should take micro-flowing water or regularly add new water to aquaculture, which can promote growth.

3. Pay attention to stocking density.

The main crayfish pond, 30 kg of 40 kg per mu stocking shrimp, more than 30 grams of specifications, broodstock stocking after timely feeding artificial feed, in April of the following year began to use the cage, shrimp cage fishing, catch big and keep small, the annual yield of 200 kg per mu 300 kg. After that, it is only harvested every year, and there is no need to release seeds. It should be noted that fishing should not be overfished, if overfishing, the yield in the coming year will inevitably be greatly reduced, at this time it is necessary to supplement the release.

Polyculture pond per mu stocking shrimp 10 kg 20 kg, specifications of about 25 grams, do not feed feed, to pond natural bait, fishing pond residue bait, in April of the following year began to use the cage fishing, catch large and stay small, the yield per mu is generally 50 kg 100 kg.

4. Key points of daily management.

Due to the fast growth of freshwater lobsters, strong metabolism and large oxygen consumption, the water quality of the shrimp pond should always be kept fresh, generally adding 15 20 cm of water per week to make the water quality lively and refreshing, and have enough dissolved oxygen. The bait should be fixed, timed, and quantitative, and the types should be diversified as much as possible, and they should be fed once a day in the morning and evening, and the bait should be cast at the shallow water edge of the pond.

5. Disease prevention and control.

Compared with other types of lobsters, it is relatively rare for freshwater lobsters to have Bichong disease. However, if the water quality of the paddy field is poor or the feeding management measures are unreasonable, then the possibility of pests and diseases will be greatly increased, in order to minimize the incidence of lobster disease, on the one hand, it is necessary to strengthen the daily management, on the other hand, it is necessary to keep up with the development trend of the times, prevent lobster diseases, and try to use a small number of times in the fertilization process to improve the resistance of lobster and ensure the health of lobster.

Second, the prospect of freshwater lobster farming

Lobster is a nutritious food that is low in fat, cholesterol and high in protein. Due to the decreasing resources of marine lobster, freshwater lobster is increasingly favored by consumers in various countries, and the demand is increasing. The development of freshwater lobster farming according to local conditions has a very broad prospect.

Currently, the international market is in demand for large quantities of freshwater lobsters.

<>1. Temperature. Crayfish to breed better with the noise, the temperature should be suitable for the growth of crayfish, crayfish survivability is relatively strong, but the most suitable temperature for crayfish survival is generally concentrated in 20 to 30 degrees left and right, pay attention to regulate the temperature.

2. Water quality. In order to ensure the survival rate of crayfish, there are also requirements for water quality, the water should be disinfected in advance, and if the water is weak and alkaline, it will help to increase the organic matter of edema and stupidity, which is suitable for crayfish survival.

3. Phytoplankton.

Although the breeding of crayfish needs to plant some phytoplankton, such as water hyacinth, etc., the fecundity of water hyacinth and other plants is relatively strong, pay attention to control the amount of phytoplankton, to avoid too much phytoplankton, water hypoxia.

4. Aquatic weeds. Because shrimp like dark places, they generally like to hide in places with aquatic weeds, and the rhizomes and leaves of aquatic weeds can also be used as food for shrimp, so friends who breed shrimp can plant a certain amount of aquatic weeds in the pond.

5. Prevent rats and snakes.

Friends who breed crayfish should also set up some natural enemies to prevent lobsters such as rats and snakes, so as to avoid the loss of lobsters due to natural enemies.

6. Precautions.

Farming lobster is not the clearer the water, too clear, the survival rate of lobster is not high, it is recommended that the water of lobster culture is the most suitable when it is turquoise, and the transparent visibility of the water can generally be controlled at 30 to 40 cm, which will be more suitable.

Crayfish are quietly adaptable to the environment and can grow in various water bodies such as lakes, ponds, ditches, and rice fields.

The water source should be sufficient, and the water depth should be about 1 meter. The pond must have sufficient water sources, good water quality, convenient water intake and drainage, and the area is generally 3 acres and 5 acres.

The ridge of the pond should have a certain slope, and in order to avoid the escape of the crayfish burrow, the width of the ridge should be above the meter of Luwei, and the anti-escape wall or anti-escape plate with a height of meters and a smooth inner wall should be set around the ridge.

Crayfish is a freshwater economic shrimp that is popular because of its delicious meat. Because of its omnivorous nature, fast growth rate and strong adaptability, it has formed an absolute competitive advantage in the local ecological environment.

If you want to breed crayfish, you must start from the construction of the site, the release of shrimp seeds, the feeding of bait and the regular inspection of the acacia line. The site is selected in the old rice field, do a good job of preventing shrimp escape, put 40 kg of shrimp seeds per mu, feed is mainly high-protein feed, regularly inspect the shrimp pond, salvage sundries and replace new water.

1. Construction site

If you want to raise crayfish, you must first choose a suitable site. The crayfish pond can be rebuilt with old rice fields, raise the embankment, clean up the silt and debris and add fine nets to the embankment to prevent the crayfish from escaping, and surround the low fence on all sides, and install barbed wire at the inlet and outlet to prevent enemies from invading the rice field.

2. Put shrimp fingerlings

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 other populations waiting for 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 mu of field.

3. Feed the bait

Crayfish in the juvenile period because of the small size of the reason, mainly to the plankton in the water body and algae detritus for food, and so on after its body gradually grows up, you can prey on some benthic aquatic animals, feeding it bait to high-protein food-based, you can put animal offal, pay attention to the timing and fixed point of quantitative delivery.

4. Regular inspections

When breeding crayfish, we must pay attention to regular inspection of the pond, especially when it rains, the water level **, lobsters may escape, in order to avoid unnecessary losses to strengthen the fence in time, and according to the situation of the shrimp group to adjust the water quality to replace the new water, or to feed the drug to prevent disease operation.