CATDOLL : CATDOLL: Where is the best place to raise shrimp?

Where is the best place to raise shrimp?

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First, choose the terrain. The breeding site should be far away from urban areas, industrial and mining areas, and farmland, and have a certain distance from the original breeding area.

Keep a certain distance between the shrimp and the water to reduce pollution and ensure good water quality. The best place to raise shrimp is at the mouth of the bay or on the coast facing the open sea, where it is less affected by the freshwater environment. The grow-out site should be located in the inner bay or on the coast with less wind and waves, in the intertidal zone or supratidal zone with smooth tides. The high-level shrimp pond should be built near the coastline 1 to 2 meters above the high tide line, in a relatively flat area, and easy to drain and irrigate. Pay attention to the aquaculture capacity to avoid overloading.

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Then, we need to find out the tide conditions, the changes in tidal range over the years, the flow direction, flow speed, wind and waves, and typhoon conditions, so as to determine the number and specifications of the water wells when the shrimp farm is fed with water. At the same time, we need to understand the annual changes in local rainfall, as well as the catchment area and water supply conditions. If there is a large amount of fresh water to regulate the salinity of the pond water for shrimp cultivation, it can promote the growth of shrimp, reduce the addition of seawater and the invasion of pathogens, and is conducive to the healthy cultivation of shrimp.

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Then, the water quality must meet the standards of NY 5052, and the water quality must be fresh and pollution-free. Due to the development of industry, agriculture and towns, the offshore bays are polluted to varying degrees. Shrimp are very sensitive to certain metal salts, especially pesticides, and full attention should be paid. In recent years, marine aquaculture, especially shrimp aquaculture, has been vigorously developed. Some offshore bays have experienced varying degrees of eutrophication, the content of organic matter, nitrogen, phosphorus, etc. in seawater has increased, the number of harmful species and protozoa has increased, and the number of pathogenic microorganisms has also increased accordingly, making it quite difficult to raise shrimp in some sea areas. Seawater salinity is very important for shrimp breeding, and the salinity is required to be between 25 and 35. The pH of the search socks hall is 7.8~8.6, the transparency is greater than 1.5 meters, and the chemical oxygen demand is less than 3.0 mg/L. The requirements for water quality in the grow-out farm are wider, and the requirements for salinity in the grow-out farm are more extensive. Low salinity is more conducive to the growth of shrimp, and the salinity of 3~35 is suitable for shrimp breeding.

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Then, it is better to choose sandy or sandy muddy bottom. This kind of bottom is not easy to accumulate silt, which is conducive to the habitat of shrimp, especially the Japanese shrimp farming has higher requirements for the bottom. Most of the coastal mudflats in southeast my country are acidic soils, especially in areas where mangroves grow luxuriantly, the acidic soil is stronger, and should be avoided as much as possible when building shrimp farms. Some potentially acidic soils containing iron disulfide are not suitable for building shrimp farms. This kind of soil is submerged in water or covered by soil and is not acidic. When the surface soil is destroyed or the water is drained, the iron dioxide is oxidized into sulfuric acid, which causes the soil pH to drop significantly. It will directly affect the growth of shrimp and algae. When this kind of soil is used as a dam, vegetation grows very slowly and is easily eroded by wind and waves, affecting the firmness of the dam.

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Then, choosing electricity for seedling raising and growing requires sufficient electricity, especially for growing farms, which require the use of a large number of aerators, which consume a lot of electricity and need to be connected to a high-voltage power grid. Choosing high-voltage electricity can reduce investment and save manpower and material resources. Because of the need for continuous power supply, generator sets are still required to be equipped for emergency use in case of power outages.

The cost of shrimp farming includes seedlings +

Jiangsu, Guangdong, Guangxi, Fujian, Hainan, Zhejiang, Shandong, Hebei and other provinces or autonomous regions have gradually promoted the breeding of front-source shrimp. The white shrimp cultivated in Yangjiabo Town, Hangu District, Tianjin is world-famous and is known as the hometown of fish and shrimp in China. Among them, the technology of white shrimp is the most mature.

What are the different types of shrimp?

There are two types of shrimps: marine and freshwater. There are many types of marine shrimps, such as nine-segmented shrimps, red rice shrimps, mud shrimps, etc. Basically, all of them can be used as bait, but the ones we often use for marine fishing are mainly selected due to price issues, and among them are sand shrimps and mud shrimps.

The current price of sand shrimp ranges from $6 to $13 per tael. The cheapest ones are in Hong Kong, and the most expensive ones are in deep water, ranging from $20 to $50. Of course, the ones that are fully swimming are more expensive.

However, when it comes to medium and large prawns, you have to go to the market or buy them directly from the fishing boat. A pound of medium prawns costs about one hundred to two hundred yuan, and large prawns are priced by the piece.

In daytime waters, there is no difference between the shrimp sold in fish shops and in the market. However, when using shrimp as bait in night waters, the shrimp sold in fish shops is different from that sold in the market.

■Shrimp

The fish shop is mostly sand shrimps, whose eyes glow in the dark sea, and their brightness is stronger than other shrimps, so they attract offshore fish to chase and eat them. The size of the shrimps also makes a difference in catching big or small fish. The shrimps with finger-sized tails are mostly used to catch standing fish, while the medium shrimps that are larger than the middle finger are mostly used to catch larger fish such as red oil, grouper, and perch. The large shrimps are used to catch large perch and large grouper.

■Shrimp survival

As for the fact that raw shrimps are prone to death, most of the causes are due to the shrimps' excrement making the water turbid, the lack of oxygen in the water and the high water temperature. In the summer daytime, it is estimated that if the above three conditions are met, the shrimps can only live for half an hour to one hour, and about half an hour longer at night. How can we make them live longer? There are several methods below: -

■Qi machine

○Method 1

If the fishing shop does not have shrimp farming tools such as shrimp boxes or shrimp tubes, you can ask the fishing shop for a paper box (usually they are provided), put paper towels or toilet paper at the bottom of the box, add sea water on the stove, then put the raw shrimp in, add a piece of toilet paper on top, and then put a little sea water. If there is a refrigerator during the day, it is best to put the whole box in. This way the shrimps will stay alive for a long time.

If you don't have a whole box to go fishing with, you should put it in a shaded place away from the sun, so that the shrimps can survive longer.

○Method 2

Selling a good gas generator and shrimp tube is the only way to solve the problem once and for all. The best NATIONAL gas generator is expensive, but it is very durable and can be used for at least six or seven years. It is waterproof and can be used for strong and weak gas. The weak gas can be used for 36 hours, and the strong gas can be used for more than 10 hours.

■Shrimp box

■ You can see the air machine connected to the shrimp box

■Inside the shrimp box

■Shrimp box cold gnat Dou Paheba

○Method 3

Now there is a new method, which is to use a shrimp box [as shown in the picture above], which can allow shrimps to survive longer. Ice and feces separators can be placed inside it to reduce water pollution and maintain low temperatures.

■Hooking shrimp method---enter through the hook mouth and do not exit through the head

■How to fish for shrimp

In addition, it is best to hook the shrimp by its mouth, so as to keep the shrimp alive. Some people do not use lead when fishing shrimp, allowing the shrimp to swim freely in the sea. This method has been used by spot and stand.

As for the size of the hook and leader to use, it depends on the target fish.

Usually, hand-wire fishing is used near the shore. When using raw shrimp bait, heavy lead should not be used. The main purpose is to allow the shrimp to float freely in the sea so that fish can chase and eat it. When using hand-wire fishing, if you are fishing at the pier, it is best to drop the shrimp close to the pillars of the pier. Usually there are unexpected gains. "This trick is a unique secret skill of Asia and Australia"

■How to make shrimp

■ Shrimp hooking method---the shrimp hooking gun does not penetrate the shrimp brain

Live shrimps become dead shrimps. Sometimes the dead shrimps can be fished after being shelled. This is usually most effective for male dogfish. However, after the dead shrimps are shelled, we sometimes process them further to make the shrimp meat harder or more flavorful.

Pickling shrimp is one of the methods, the method is as follows: -

◎ Remove the shell first

◎Sprinkle salt on the shrimp meat, mix it evenly with your hands, and leave it for a while.

◎Add your favorite flavors → honey, bait powder (after making bait, you can use the remaining bait powder, 365/General/crab powder/clam powder are all fine), MSG, sugar, cornstarch, shrimp paste, peanut butter, sesame powder, chicken powder, ... and so on, and add rice wine.

◎After mixing, seal it in a sealed plastic bag and put it in the freezer.

◎ Before fishing, first remove the oysters and larvae.

Instructions for marinating shrimp

Shrimp is also a bait for rock fishing, and chickens and fish are attracted by shrimp, which is white and attractive. In summer, we often use this bait for rock fishing to prevent small fish from eating the bait. In addition, the shrimp shell can be ground into powder and used as an additive for bait. If you buy dead shrimp to make shrimp, remember to keep it, because the shrimp head has a strong smell, which can attract fish such as small scales and yellow clothes to take the bait.

1. Chinese prawns (Penaeus orientalis)

Chinese shrimps are mostly called shrimps, prawns, and prawns in my country. They are also called green shrimps (female) and yellow shrimps (male). They are called Taisho shrimps in Japan. They are mainly distributed in the Bohai Sea and the Yellow Sea in China, and a small amount is also distributed in the northern part of the East China Sea. They are the main species of breeding in my country. Their characteristics are:

1. Larger individuals

Female shrimps in natural sea areas are generally 16-20 cm long and weigh 70-80 grams, with the largest reaching 26 cm and weighing 150 grams; male shrimps are generally 14-16 cm long and weigh 40-50 grams. Female farmed shrimps are generally 12-15 cm long and weigh 20-30 grams.

2. Faster growth

Generally, after 100 to 120 days of breeding, the average body length can reach more than 12 cm and the weight can reach more than 20 grams.

3. Strong adaptability

Penaeus chinensis is a low-temperature, wide-salinity species; the suitable temperature range during the breeding period is 14-30 degrees Celsius, and the most suitable water temperature is 25 degrees Celsius; the lethal low temperature is 4 degrees Celsius, and the lethal high temperature is 38 degrees Celsius; the suitable salinity range is 0.2%-4%. It can still grow normally when the dissolved oxygen is as low as 2 mg/L.

4. Insufficient seed sources

The technology of overwintering of broodstock and artificial seedling cultivation has matured, and factory-based seedling cultivation can produce in large quantities, so the source of seedlings has been solved.

5. Easy to capture

Since it does not have a strong habit of burying in the sand like the Japanese shrimp, the gates can be opened to release water and the shrimp can be caught, and the capture method is simple and easy.

2. Penaeus monodon

This shrimp is named for the spots on its shell. Because it likes to live among water plants or algae, it is also called grass shrimp in the southern coastal areas of my country and Taiwan. It is widely distributed in tropical and subtropical waters, such as the Indian Ocean, the Philippines, Australia, and the southern coast of Japan. It is more common in Fujian, Taiwan, Guangdong, and Hainan in my country. It is an excellent breeding variety. From the current breeding scale and output, it is called the world's three major shrimps together with Chinese shrimp and white shrimp. Its characteristics are:

1. Large individual

Among the prawns, Penaeus monodon is the largest species. According to relevant information, the maximum body length can reach 30 cm, the weight can reach 350-400 grams, and the maximum can reach 500 grams, which can be called the "king of prawns".

2. Fast growth

According to reports from Taiwan Province, in a shrimp pond where fish and shrimp are raised together, the body weight increases from 0.1 grams to 55 grams after 120 days of breeding. Generally, in a intensive shrimp pond, the body length can reach 12 centimeters and the weight can exceed 20 grams.

3. Strong adaptability

The suitable water temperature range during the breeding period is 10~34 degrees Celsius, and the optimal water temperature is 28 degrees Celsius. It can grow normally when the water temperature does not exceed 34 degrees Celsius, the dissolved oxygen is not less than 2 mg/L, and the salinity is within the range of 0.2%~4%.

4. Omnivorous diet

The feed is slightly plant-based. The yield is high, 3000~4500 kg per hectare, and the feed coefficient is low, generally 1.5~2.0.

5. Can be used for living

Because the shell of Penaeus monodon is thicker and harder, it has strong resistance to mechanical damage and drought and exposure, so it can be transported live over long distances and exported live.

3. Japanese shrimp

Because of the colorful patterns on its shell, it is called bamboo shrimp in Guangdong, spotted shrimp in Taiwan, flower shrimp in Hong Kong, and car shrimp in Japan. It is distributed from the Red Sea, eastern Africa to the coasts of North Korea and Japan, and also distributed in the East China Sea and South China Sea of ​​my country. This species is the main breeding species in Japan, and currently my country has carried out large-scale breeding production. Its characteristics are:

1. Larger individuals

Female shrimps in natural sea areas are generally 16 to 18 cm long and weigh 50 to 60 grams, and their maximum weight can reach 130 grams.

2. Faster growth

Generally, after 100 to 120 days of breeding, the average body length can reach more than 12 cm and the weight can reach more than 20 grams.

3. Strong adaptability

This species is the most resistant to low temperatures among the Penaeus genus (except Penaeus chinensis). The suitable temperature range during the culture period is 14~30 degrees Celsius, and the most suitable temperature is 22~28 degrees Celsius. When the temperature drops to 10 degrees Celsius, it stops feeding and dies at 5 degrees Celsius. It can tolerate high salt but not low salt. The suitable salinity is 2%~3.5%, and it cannot live in low salt water below 2% for a long time. Due to its wide temperature range of growth, it can be cultivated in shrimp ponds idle in winter in the south and in the north for shrimp farming.

4. Have strong sand-diving habits

The depth of the burrowing sand increases with the growth of body length. The depth is 1~2 cm in the early stage and 4~5 cm in the later stage. It hides during the day and comes out at night. The breeding environment should be fresh water and fine and loose sand.

5. Can be used for living

Because of its thick carapace and resistance to desiccation and exposure, it can survive for a long time out of water, making it suitable for long-distance transportation and live shrimp export.

Huihe 4. Longhair Shrimp

This species is the main aquaculture species in southern my country. It is called red shrimp in southern Fujian, large shrimp or white shrimp in Guangdong and Guangxi, and red tail shrimp in Taiwan. It is mainly distributed in the Indian Ocean and the western Pacific Ocean from Pakistan to the coast of Indonesia. It is most common in the coasts of Fujian, Taiwan and eastern Guangdong in my country. Its characteristics are:

1. Larger individuals

Females in natural sea areas are generally 15 to 18 cm long and weigh 50 to 60 grams, and can reach a maximum weight of 100 grams.

2. Faster growth

Generally, they are raised for 100 to 120 days, with an average body length of 12 cm and an empty body weight of more than 20 grams.

3. Strong adaptability

The suitable temperature range during breeding is 16~34 degrees Celsius, and the salinity is 1%~3.5%. It is more tolerant to high salt but not low salt, and its shell is thin and easily susceptible to mechanical damage.

4. The source of seedlings is easy to solve

Mature broodstock can be obtained in artificial breeding or natural areas, and it is easy to carry out artificial seedling factory production.

5. Late or secondary breeding can be carried out

Because this variety is more resistant to low temperatures than other southern shrimps, it can be cultured in the late and late seasons.

5. Penaeus merguiensis

This species is mainly distributed in the Indian Ocean and the Western Pacific Ocean. It is the main aquaculture species in Guangdong, Guangxi and Hainan provinces in my country. It is called prawns or white shrimps. Hong Kong and Australia call it white shrimps. It is mainly distributed in the warm water areas of the Indian Ocean and the Western Pacific Ocean. There are more in western Guangdong, Hainan Island and the coastal areas of Guangxi in my country. Its characteristics are:

1. Larger individuals

Females in natural sea areas are generally 14 to 16 cm long and weigh 40 to 50 grams, and their maximum weight can reach 100 grams.

2. Faster growth

Generally, they are raised for 100 to 120 days, with an average body length of 12 cm and a weight of more than 20 grams.

3. Strong adaptability

The suitable temperature during breeding is 20~32 degrees Celsius, and the salinity is 0.8~4%. When the water temperature is higher than 35 degrees Celsius or lower than 13 degrees Celsius, life and growth will be abnormal.

4. The source of seedlings is easy to solve

Mature broodstock can be obtained under artificial conditions or in natural sea areas, and it is easy to carry out artificial seedling factory production. Two or more breeding can be carried out to increase the utilization rate of shrimp ponds and improve production and benefits.

Shrimp belongs to the kingdom Animalia, the phylum Arthropoda, the class Crustacea, the subclass Soft Shell, the order Decapoda, the suborder Swimming (this suborder refers to various shrimps)

Freshwater shrimp, sea shrimp and river shrimp are classified according to region.

The real classification is based on the living habits and shapes of the people.

Such as sand shrimp, lobster, shrimp, big head prawn, etc.