CATDOLL : CATDOLL: How profitable is it to raise hairy crabs?

How profitable is it to raise hairy crabs?

River crab farming is profitable and more profitable than planting general crops. If you raise them well, the profit can reach 2,000-3,000 yuan per mu.

River crabs belong to the class Crustacea, the genus Mitten, and are large crustaceans with 21 body segments. As the segments of the head and thorax are fused together, the whole body is divided into two parts: the cephalothorax and the abdomen. The back of an adult crab is dark green, the belly is grayish white, and the cephalothorax is 6-7cm long and 7.5cm wide on average.

River crabs often live in the muddy banks of rivers, lakes and swamps, are active at night, and feed on fish, shrimp, animal carcasses and grains. Every autumn, they often migrate to the estuaries of rivers to lay eggs, which hatch in March to May of the following year. After developing into juvenile crabs, they swim upstream and continue to grow in fresh water. The meat of river crabs is fresh and tender, and is a favorite food of people.

The scientific name of river crab is Chinese mitten crab. It is a precious freshwater product with delicious taste, rich nutrition and high economic value.

How to operate

01

Prepare a pond for raising crabs. The water in the pond should not be too deep, and the standard is that it should not exceed the back of the crab.

02

Crabs need proper exposure to the sun to make their meat more tender, but the exposure time should not be too long.

03

Crabs are omnivores. They can eat the offal of various poultry, as well as small fish and shrimps. Please note that the amount of food you feed them should be based on the crab's appetite.

04

Farming crabs in large quantities requires sufficient water to prevent the crabs from being squeezed and injured. Sufficient water can also ensure water quality and improve the survival rate of crabs.

There are many varieties of crabs. Let's take the most common river crab as an example. Generally, the stocking volume of river crabs in a pond of one acre is about 600, and the specification is 3g/crab. Its price is greater than 0.8 yuan/crab, so the cost of breeding crabs is about 480 yuan.

Feed cost: River crabs can feed on natural bait in the pond during their growth. Generally, the amount of feed required for the entire growth process of one acre of river crabs is about 160kg. The price of feed is generally around 6.25/kg, so the feed cost of one acre of river crabs is about 1,000 yuan.

Pond rental: If you don’t have a pond, you will also need to pay for the pond rental. Usually the pond rental is not too expensive. The more you rent, the cheaper it is. Generally, one acre costs about 1,000 yuan.

Water grass snails: When breeding river crabs, water grass is indispensable. Water grass can be used as bait for river crabs and can also provide shade for river crabs. Therefore, it costs about 400 yuan to plant a proper amount of water grass in the pond, and about 800 yuan to breed a proper amount of snails in the pond as natural bait for crabs, so a total of 1,200 yuan is needed.

Miscellaneous expenses: When breeding crabs, it is necessary to do a good job of preventing and treating crab diseases, so drugs are needed, and then electricity and other miscellaneous expenses are added. It takes about 150 yuan, so we can calculate based on these data that the total cost of breeding one acre of crabs is about 3,800 yuan.

How much profit can you make by raising crabs on an acre of land?

There are three crab fishing specifications, namely 20 jin, 60 jin and 110 jin. Because of the different specifications, the prices will naturally be different. The price of 20 jin is generally around 65 yuan/jin, and the output value is 1,300 yuan. The price of 60 jin is 30 yuan, and the output value is 1,800 yuan. Then the price of 110 jin is the highest, about 50 yuan, and the output value can be increased by 5,500 yuan. Therefore, the total output value of one acre of crabs is about 8,600 yuan. Excluding the cost of crab farming, the net profit of one acre of crabs is about 5,000 yuan.

What is the outlook for crab farming in 2020?

1. High demand

In recent years, the fresh seafood industry has become increasingly hot. Whether it is hairy crabs or crayfish, they are very popular in e-commerce. In addition, the investment cost of e-commerce is relatively low. If the business is done well and the sales volume is considerable, the profit will naturally be high. Therefore, the market for crabs is still large and the prospects are quite promising.

2. Stable market conditions

In the entire aquatic industry, crayfish are in a period of pain, sea cucumbers are out of the violent era, the fish market is unstable, and the crab market has remained stable. Although the price has plunged this year, it is only limited to this year. The amount of crab farming in the country is increasing year by year, and it is very popular.

3. Higher price

The price of crabs is higher than other aquatic products. It depends on the size of the crab. If the crab is big, the price is still relatively high. In fact, as long as the hairy crabs are well raised and the hairy crabs are of high specifications and quality, the profit is still very substantial.

4. Market gap

Although the price of crabs has not been ideal in recent years, some farmers will withdraw from this market, so there may be a gap in the hairy crab market. As long as you seize the opportunity, it is still very possible to get rich through hairy crab farming.

What to feed crabs?

1. Natural bait

1. Phytoplankton: including diatoms, golden algae, dinoflagellates, naked algae, green algae, etc., which are feed for early juvenile crabs and zooplankton.

2. Zooplankton: Rotifers, cladocerans, copepods, etc. are good feed for it.

3. Aquatic plants: including Vallisneria, Hydrilla verticillata, Water Chestnut, Potamogeton, Duckweed, Lemna, Water Lettuce, Water Peanut, Golden Grass, etc., are its main natural bait.

4. Benthic animals: Snails, clams, river clams, earthworms, etc. in the water are its best feed.

2. Artificial Animal Bait

Artificial animal baits mainly include snails, clams, river clams, silkworm pupae, mealworms, earthworms, small fish, maggots, and livestock and poultry viscera.

3. Artificial plant bait

Artificial plant baits mainly include soybeans, bean cakes, vegetable cakes, cottonseed cakes, wheat, rice bran, bean dregs, distiller's grains, sauce residues, peanut cakes, etc.

How much is the profit of crab farming? Is it easy to raise? Thank you

At present, the profit of crab farming technology is still quite good. Crab farming has good profit, but the key lies in how to raise it? Many people are not very clear about the scientific technical methods of crab farming, which has caused many crab farmers to lose money.

Method of raising crabs with aquatic EM bacteria:

1. Water spraying method: Use 1 kg of Yi Fu Yuan EM bacteria per mu, add an equal amount of brown sugar, first dissolve the brown sugar with warm boiled water, then add a small amount of water, adjust the water temperature to 30-40 degrees, pour in the bacteria solution and seal it for fermentation for 2 hours, then dilute it 200-500 times and spray it all over the pond or around the pond, or dilute the Yi Fu Yuan EM bacteria and spray it directly on the surface of the fish pond.

2. Feed soaking method: add 1% aquatic EM bacteria to feed fresh fish and other animal feeds; add 2% aquatic EM bacteria to feed granules, dilute and spray on the granules; add 3-4% aquatic EM bacteria stock solution to feed soybeans, soybeans, wheat, corn and other raw materials. You can also add an equal amount of brown sugar and soak it in water, seal it for 16-24 hours and feed it. When using the feed soaking method, the pond water does not need to be splashed with Yi Fuyuan EM bacteria liquid. Feed soaked with Yi Fuyuan EM bacteria is acidic, and fish, shrimps, crabs and clams love to eat it. It is easy to digest and absorb after eating. Practice has proved that the Toshiba feed soaked with Yi Fuyuan EM bacteria can be kept for 5-7 days without flowers and deterioration even after being put into the water body in high temperature weather in summer, which greatly reduces the waste of feed and pollution to the water body.

1. Seedling soaking

In the traditional method, salt or potassium permanganate is used for soaking crab seedlings. Now many farmers soak crab seedlings with Yifuyuan biological stock solution before stocking.

The specific method is: add 1000 ml of biological stock solution to 250 kg of water, use an inflatable oxygen pump to increase oxygen, then put the crab seedlings into the water and soak them for a period of time.

For 20 to 30 minutes, let the crabs move freely in the water with sufficient oxygen and bacteria, absorb and spit out water, and excrete harmful substances in the body. This can significantly reduce the risk of river crabs.

The number of deaths during the first and second molting. According to experimental statistics, the mortality rate of crab seedlings was reduced by 30% to 40%.

2. Dip and mix feed

In the process of high-yield and high-efficiency crab farming, the daily feed mainly includes fresh small fish, frozen marine fish, pellet feed, etc., especially fresh small fish and frozen

Marine fish contain a large number of bacteria, which can easily cause enteritis in river crabs and pollute the water quality. In aquaculture, we adjust the feed structure on the one hand, and on the other hand

Combined with Yi Fu Yuan biological stock solution, the specific method is: 100 ml of Yi Fu Yuan biological stock solution mixed with 1500 ml of water, evenly sprayed on 100 kg of pellet feed,

If you feed fresh small fish or frozen marine fish, cut 100 kg of fresh small fish or frozen marine fish into slices and add 100 ml of Yifuyuan biological stock solution.

Mix well, soak for 3 hours and then feed. This can significantly reduce the incidence of enteritis in river crabs and cause less pollution to the water body.

3. Water quality regulation

In the process of river crab farming, in May every year, when the temperature rises, the moss begins to die, the pond water gradually becomes thicker and the water color becomes turbid, which affects the photosynthesis of the aquatic plants.

In severe cases, the grass and water will be damaged. At this time, 100 grams of chlorine dioxide should be sprayed throughout the pond for each acre to disinfect the water body, and then 500 ml of Yifuyuan biological stock solution should be used to spray the entire pond. Spray it again after an interval of 15 to 20 days to make the beneficial population in the pond dominant, increase the transparency of the water body, and form a fresh, lively, tender and refreshing

High-quality aquaculture water can make the photosynthesis of aquatic plants normal, improve their ability to purify water quality, and ensure the smooth progress of river crab farming. After applying Yifuyuan biological stock solution, river crabs have strong disease resistance, fast weight gain, large size, good quality, and significant economic benefits, with an increase of about 30% in production and 20% to 30% in benefits.