CATDOLL : CATDOLL: Address of the lobster breeding base in Batun, Lujiang County

Address of Batun Lobster Breeding Base in Lujiang County

Chengchi Village, Ketan Town.

The Batun rice, shrimp and fish breeding base is located in Chengchi Village, Ketan Town. In accordance with the adjustment of the national industrial policy and in combination with the local government's characteristic agricultural development plan and market demand, the local area has introduced Australian crayfish, created the Batun rice and shrimp brand, built a lobster deep processing base, and developed rural industries such as homestay tourism, continuously extending the industrial chain, enhancing the value chain, and strengthening the ecological chain.

Crayfish farming in my country is mainly concentrated in Hubei, Jiangsu, Anhui, Jiangxi, Hunan, Shandong and other regions, especially Hubei.

What are the techniques for breeding crayfish? How to breed them? Thank you!

Crayfish breeding technology

The first is to create a good growth environment for lobsters. Lobsters are crustaceans, similar to crabs, with a pair of particularly developed claws. They have the habit of digging holes to live in, usually near the water's shore. Lobsters prefer shade and are afraid of light. They crawl out of their holes when the light is weak or dark, and sink to the bottom of the water or hide in their holes when the light is strong. According to the habits of lobsters, a 50-cm high escape-proof net can be added to the riverside to prevent lobsters from escaping. At the same time, rivers and ponds simulate the ecological environment of lobsters under natural conditions, and 10-15% of aquatic plants and shelters are shallowly planted by the pool to create an environment for lobsters to live and shed their shells, reducing cannibalism.

The impact of water quality on lobster production cannot be ignored. The quality of water directly affects the healthy growth and development of lobsters. During the breeding process, the pH value of the pond water is maintained between 7.5-8.5, and the transparency is 30-40 cm. New water should be added frequently, and quicklime solution should be sprinkled regularly to adjust the water quality and prevent diseases and molting failure.

Second, feed them properly. Lobsters will kill each other when they are hungry or have insufficient food, so the amount of feed must be sufficient. Lobsters are fed with animal and plant feed. Plant feed includes wheat, aquatic plants, rapeseed cake, etc. Animal feed includes fish, meat, and animal offal. Usually, the feeding time, feeding amount, and feeding method are determined according to the habit of lobsters hiding during the day and coming out at night and the density of shrimps in the pond. Otherwise, the feed cost will increase and the breeding efficiency will be reduced.

The third is scientific fishing. In the process of lobster farming, young shrimps can generally grow to commercial size in 60-90 days if the temperature is suitable and the feed is sufficient. The young shrimps are released in March and the rotation fishing begins around June, with the big ones being sold and the small ones being kept. By catching the big ones and keeping the small ones, and rotating the fishing and releasing, the recapture rate can be increased, and the prices can be sold at a good price, achieving the goal of high yield and high efficiency.

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Introduction to Freshwater Crayfish Breeding Technology

Freshwater lobster, scientific name Procambarus clarkii, also known as lobster, big lobster, big red shrimp. This shrimp is native to the United States and was introduced to my country from Japan during World War II. It is now widely distributed in the middle and lower reaches of the Yangtze River. This shrimp belongs to the warm tropical freshwater shrimp, with strong adaptability, high reproduction rate, miscellaneous diet, fast growth, disease resistance, high temperature resistance, low oxygen resistance, and will not die even if out of water for several hours. The shrimp meat is tender and nutritious, containing 8 essential amino acids for the human body, but with a low fat content, and contains more tropomyosin and paramyosin, and the edible part is high. It is deeply loved by domestic consumers, and the export volume is also increasing day by day. The sales and purchase prices are constantly rising, and the breeding prospects and benefits are optimistic.

Freshwater lobsters live widely in freshwater lakes, rivers, ponds, ditches and rice fields. Benthic organisms, plankton and various aquatic plants are all palatable baits, and they grow well in these waters. Young shrimps live in shallow waters or by the pond, and like to live in caves, sometimes hiding in the secluded places of gravel and aquatic plants. Usually, shrimp holes are dug in the reed-covered beach areas around the large water surface with more clay, swamps and reeds. Shrimp holes are generally round, tilted downward, up to about 30 cm deep, and the winding directions are different. Freshwater lobsters often move seasonally in their habitats. In spring, when the water temperature rises, shrimps mostly move in shallow waters; in midsummer, when the temperature is not high, they move to deep waters; in winter, they hibernate in caves. Freshwater lobsters also molt, grow and reproduce in caves to prevent being hurt. Moreover, the shrimps prefer shade and fear light, and crawl out of the caves when the light is weak or dark. In the rainy season, freshwater lobsters often climb onto land to move around. The shrimp has a strong ability to withstand hunger, and can generally withstand hunger for 3 to 5 days; in autumn and winter, it will not starve to death even if it does not eat for 20 to 30 days. The optimum temperature for feeding is 25 to 30 degrees Celsius; the activity decreases when the water temperature is below 15 degrees Celsius; the feeding rate decreases significantly when the water temperature is below 10 degrees Celsius or exceeds 35 degrees Celsius; when the water temperature is below 8 degrees Celsius, it enters the wintering period and stops feeding. The lifespan of male freshwater lobsters is generally 20 months, and the lifespan of female shrimps is 24 months.

Freshwater lobsters usually mate and lay eggs from the end of October to March of the following year. The mating time varies in different waters. If the eggs mate too early, they are often immature, and if they mate too late, they are overmature and aged. The suitable water temperature for mating is 22~25℃. It is best not to catch them during the mating season, so that they can hatch and reproduce. Freshwater lobsters mate in spring, summer and autumn, and can lay eggs 3~4 times a year. Generally, the parent shrimps with a body length of 7~10 cm and a weight of 15~30 grams can carry 220~270 eggs, and the number of eggs varies greatly depending on the size of the individual. Under normal circumstances, the egg-carrying shrimps need a 1~2 month incubation process (i.e. embryonic development) after mating and spawning, which requires a lot of physical strength, so it is necessary to strengthen the nutrition and cultivation of the egg-carrying shrimps. The suitable water temperature for hatching egg-carrying shrimps is 22~27℃, and the incubation time is 6~10 weeks. Before shrimp fry cultivation, ponds must be cleaned and disinfected, water must be filtered, and then organic fertilizers must be applied to cultivate natural bait organisms for shrimp fry to eat. Generally, the stocking density of shrimp fry during cultivation is 150,000 to 200,000. If the "soy milk" method is used for cultivation, the stocking density can be 160,000 to 180,000.

2. Lobster farming technology

Lobsters can be raised in ponds that are used to raise Japanese prawns. Ordinary ponds can also be used for lobster farming. The farming techniques after stocking are similar to those of Japanese prawns, including preliminary preparations, feed placement, and water quality management. However, attention should be paid to their habit of burrowing, and escape prevention measures also need to be strengthened. Lobsters have strong endurance and high production. The current market demand is also large, and the economic benefits of farming are considerable. The most common shallow water rice field farming is introduced below as an example, and other farming methods can be referenced.

3. Farming freshwater lobsters in rice fields

The yield of freshwater lobsters raised in rice fields can generally reach 400-500 kg per mu, and can reach 600 kg at high yields. Raising shrimps in rice fields can eat weeds and other aquatic organisms that consume fertilizers in the fields, which not only saves labor for weeding, but also eliminates mosquitoes and flies that harm people and livestock. In addition, shrimps move and forage constantly in rice fields, which can not only help loosen the soil, activate water, ventilate, and increase the dissolved oxygen content of field water, but also excrete a large amount of feces through metabolism, which has the effect of preserving fertilizer and increasing fat.

1. Selection of rice fields

To raise freshwater crayfish in rice fields, you must choose rice fields with sufficient water sources, that are not affected by droughts and floods, have fresh and pollution-free water, fertile soil, good water retention properties, and plenty of sunlight. Although the water quality of some mountain streams or springs is relatively poor and the water temperature is relatively low, if they can have a longer flow or pass through rice fields where shrimps are not raised and then flow into shrimp-raising rice fields, the water temperature will increase and it will also be suitable for shrimp farming.

2. Reconstruction of rice fields

In order to facilitate production management and daily feeding, the area between drainage channels is generally used as a breeding block. A circulation buffer ditch with a depth of 0.5~0.6 meters and a width of 1.0~1.2 meters is dug 0.6 meters away from the inner side of the surrounding ridges, and all the soil is turned over to the side ridges, so that the side ridges reach 0.8~1.0 meters high and 0.6~0.8 meters wide at the top. The side ridges should be compacted and the inner slopes should be flat. At the same time, a closed protective wall is surrounded by plastic film on the inner side of the ridge top. The height of the fence is 0.4~0.5 meters above the ground and buried 0.1~0.2 meters underground. Anti-escape nets should be set up at the upper and lower inlets and outlets.

In order to facilitate shallow irrigation, drying, application of fertilizers, pesticides or fishing in rice fields, shrimp ditches and shrimp ponds must be dug in shrimp-raising rice fields. Shrimp ditches can be dug after transplanting rice seedlings, and the digging method should be determined by the shape of the field, the size of the field and the direction of the drainage outlet. If the rice field is small, it can be dug into a "field" shape; if it is a long and large field, it can be dug into an inner "well" or inner "field" shape, and the width and depth of the ditch should be 0.3~0.4 meters respectively. Shrimp ponds can be dug at the intersection of shrimp ditches or at the four corners of the field, and connected to the shrimp ditches. Shrimp ponds are generally 1.0 meters square and 0.8~1.0 meters deep.

When raising shrimp in rice fields, the inlet and outlet should be well opened. The location should be selected on the earthen ridges at the two opposite corners of the rice field. During the breeding process, the water in and out of the rice field can flow smoothly. Fences should be set at the inlet and outlet to prevent shrimp from escaping.

3. Shrimp stocking

Stocking time: Whether it is the shrimp seed of the year or the broodstock with eggs, we should strive to stock them early. Early stocking can not only prolong the growth period of shrimp in the rice field, but also make full use of the large amount of natural bait resources cultivated after fertilizing the rice field. The conventional stocking time is generally in November each year or the end of March of the following year.

Stocking density: 30-40 kg of broodstock with eggs are stocked per mu of rice field. You can also wait until April or May of the following year to stock young shrimps, with 12,000 to 15,000 shrimps per mu of rice field. Note that broodstock with eggs should be directly raised in the outer ditch for wintering, and then the shrimps can be lured into the rice field for growth when the rice seedlings turn green. There are two general breeding and stocking modes:

(1) Summer stocking: mainly stocking juvenile shrimps artificially bred that year. The stocking period is from July to September. 15,000 to 20,000 juvenile shrimps are stocked per mu of shrimp ditch.

(2) Winter stocking: usually carried out in December, 10,000 to 15,000 shrimps of about 3 cm in diameter are stocked per mu of shrimp ditch. In places where conditions permit, shrimp farming can be carried out in two seasons, one season of raising green shrimps from July to October, and one season of raising freshwater lobsters from December to May to June of the following year.

4. Feeding and management

(1) Feeding: When raising shrimp in rice fields, feeding should be done at regular times, in designated areas, with fixed quantities and quality. In the early stage, feeding should be done once in the morning and afternoon; in the later stage, feeding should be done after 6 pm. The types of feed used are mostly small fish, snail meat, clam meat, earthworms, animal offal, silkworm pupae, corn, wheat and barley flour. You can also feed them an appropriate amount of plant feed, such as water hyacinth, water duckweed and water duckweed. The daily feed amount is 3-5% of the shrimp's body weight. You should always check the shrimp's eating habits. If the feed is eaten within 2-3 hours, it means that the amount of feed is insufficient and you should increase the amount of feed appropriately. If there is any left on the second day, you should reduce the amount of feed appropriately.

(2) Eliminate pests: There are many pests in rice fields, such as centipedes, snakes, water birds, eels, and water rats. In the early stage of shrimp farming, the stems and leaves of rice plants are not lush, and there are large gaps in the water surface of the field. At this time, the shrimps are also small, with weaker mobility and poorer ability to escape from pests, making them easy to be attacked by pests. At the same time, freshwater lobsters need to molt every once in a while to grow. When they are molting or just molting, they are most likely to become palatable bait for pests. At the harvest time, due to the shallow drainage of the field water, the shrimps may crawl everywhere, making them larger targets and easy to be preyed on by birds and beasts. In this regard, it is necessary to strengthen field management and drive away pests in time. In addition, after the shrimps are released, domestic ducks should be prohibited from going into the field ditches to avoid losses.

(3) Field ditch management: After shrimps are released, it is very important to manage the field ditch well.

The impact of water quality on lobster production cannot be ignored. The quality of water directly affects the healthy growth and development of lobsters. During the breeding process, the pH value of the pond water is maintained between 7.5-8.5, and the transparency is 30-40 cm. New water should be added frequently, and quicklime solution should be sprinkled regularly to adjust the water quality and prevent diseases and molting failure.

Strongly recommended: We have a full set of technologies that can be provided if needed

Key points of breeding technology for "Crayfish"

Here are the methods to keep lobsters alive:

1. Breeding facilities. To breed lobsters, you need to build a pond with a flat bottom, good water storage, and sufficient water source. The area should be between 4-10 acres, and the water depth should be kept within the range of 1 meter to 1.5 meters. During the breeding period, you should use plastic film to build a protective net along the edge of the pond to prevent lobsters from escaping.

2. Preparation for stocking. One month before stocking lobsters, drain the water from the pond, remove excess silt, disinfect the pond with bleach, add decomposed farmyard manure to cultivate plankton, and plant algae and water plants at the bottom of the pond to provide a place for lobsters to hide, rest, and molt.

3. Feeding management. Lobsters have a varied diet. During the breeding process, they can be fed twice a day from July to October each year, mainly fish, snail meat, shrimp meat, and watermelon, so that they can take in enough nutrients. In other seasons, they should be fed once a day, and it is best to feed them at night to increase their food intake.