CATDOLL : CATDOLL: Can yellow croaker be farmed artificially? How to farm it?

1. Can yellow croaker be artificially cultivated? How to cultivate it?

Yellow croaker can be artificially bred. Wild yellow croakers live in the ocean and adapt to the marine environment. If they are artificially bred, an environment similar to seawater is also needed, so the difficulty of breeding is relatively large. The water temperature, oxygen content, salinity, and pH value all need to be paid attention to. However, since yellow croaker is popular in the market, many breeders also breed them on a large scale. However, the meat of artificially bred yellow croaker is not as firm as that of wild yellow croaker. 1. Can yellow croaker be artificially bred? Yellow croaker is a common fish in my country. Wild yellow croakers live in the ocean and belong to marine fish. Since they live in the ocean and adapt to the environment in seawater, it is relatively troublesome when we want to artificially breed them because we need to adjust the environment around them. Factors such as water temperature, oxygen content, pH value, salinity, etc. all need to be paid attention to. However, since yellow croaker is more popular in the market, the behavior of artificially breeding yellow croaker also exists in my country, and some breeders will also choose to breed on a large scale.

However, there is a difference in quality between artificially farmed yellow croaker and wild yellow croaker, and the difference in taste is quite obvious. The meat of wild yellow croaker is firmer and tastier.

2. How to farm yellow croaker 1. Equipment: If you use cage farming, you need to prepare suitable and relatively soft cages for the yellow croaker to avoid scratching the yellow croaker. Before putting the yellow croaker in, it needs to be properly disinfected, which is more conducive to the survival of the yellow croaker.

2. Feeding: Yellow croakers mainly eat meat, so you can consider their habits when feeding them. It is okay to feed them small fish, shrimps and scallops. You can feed them once in the morning and evening every day. It is best to feed them at a fixed time every day and feed them a fixed amount.

3. Water environment: When breeding yellow croaker, many factors in the water environment need to be paid attention to. For example, water temperature. Since yellow croaker is a warm-temperature fish, it is better to control the water temperature between 22-26 degrees. Another example is the salinity range in the water. It is better to control it between 1.8-2.5%. You can also pay a little attention to the dissolved oxygen content in the water, try to keep it above 5ml per liter.

2. Farming yellow croaker is risky. How to reduce the risk?

Yellow croaker is the most commonly eaten fish in people's daily life. Yellow croaker tastes delicious and the price is relatively reasonable, so the future prospects of breeding yellow croaker are relatively good. However, while there is a good prospect, we cannot ignore that the risks of breeding yellow croaker are also relatively large. If you want to breed yellow croaker well, you must learn to reduce the risks of breeding yellow croaker. So how can we reduce it?

Be well prepared before breeding. Breeding industry is no different from other industries. You cannot choose breeding hastily after getting excited. You must make adequate preparations before breeding, especially since yellow croaker is very difficult to raise.

Generally speaking, there are two ways to farm yellow croaker, one is cage farming and the other is pond farming.

If you want to use the first cage farming method, you must first understand what species of yellow croaker you are raising and how big its adult body will be. Choose the appropriate size of the box based on the size of the yellow croaker. This will prevent the yellow croaker from having its skin abraded during its growth process.

If you want to use pond farming, then when choosing a location, try to choose a place with a water source nearby. And the pond must be fully disinfected before farming. There are also certain requirements for the depth of the water, try to be around two meters.

At the same time, water quality adjustment equipment and oxygenation equipment must also be prepared.

When choosing yellow croaker fry, you must be careful and don't be deceived. Yellow croaker is a relatively precious farmed fish. It is expensive and difficult to raise. Therefore, when choosing fry, you must choose healthy ones, which can greatly increase the survival rate of the fry and minimize our losses.

When choosing fry, you can choose some that look stronger and larger. The most important thing is that the scales on the surface must be intact, without any scratches, and the skin must be shiny.

And you should observe the fish school as a whole. If there are sick fish in the school, try not to buy them. Otherwise, if they are infected with infectious diseases, they will spread among the whole school. If you buy them back and cannot get timely treatment, it may cause very serious losses.

Pay attention to daily management. Daily management is also very important during the breeding process. Yellow croaker has very high requirements for water quality, so the water quality must be observed every day. If there is a problem with the water quality, the water must be completely replaced. If the fish is sick, the entire pond needs to be disinfected.

Remove the sick fish and treat them individually, and also observe the specific conditions of other fish. During daily feeding, if there are food residues that have not been eaten, these residues must be removed in time, otherwise the water quality will be damaged and the fish may die quickly.

First of all, you should carefully select the fry. Secondly, consult professionals during the breeding process. At the same time, problems should be dealt with in a timely manner to avoid risks.

Stabilizing the ecological environment in the pond, lowering the temperature, and cultivating a large number of algae plants will provide more food for the fish and reduce the risk.

First of all, you should choose more professional breeding technology, and you should also invest prudently, and you also need to choose a breeding environment with better waters.

3. How to raise small yellow croaker

During the cultivation period of small yellow croaker, it is generally fed once in the morning and once in the evening. Compared with red sea bream and mullet, large yellow croaker has the characteristics of slow feeding and small amount. Therefore, feeding should be slow. It grows fastest during high temperature. In order to maintain the natural golden color of commercial fish. In the later stage of breeding, it is necessary to cover the net cage with shade to control the light. The best water temperature for growth is 22-26℃. Salinity is 1.8%-2.5%, dissolved oxygen is more than 5 ml/L, and pH is 8.0.

Yellow croaker is also known as yellow croaker. It lives in the East China Sea. There are two hard stones in the fish head, called fish brain stones, so it is also called stone head fish. The white fish bladder in the fish belly can be used as fish glue, which has the effect of stopping bleeding and can prevent hemorrhagic purpura.

Yellow croaker is divided into big yellow croaker (Pseudosciaena crocea) and small yellow croaker (Psendosciaena polyactis), which are one of the four major marine species in my country. Big yellow croaker is also called big xian, golden dragon, cucumber fish, red melon, golden dragon, osmanthus yellow croaker, big king fish, big yellow croaker; small yellow croaker is also called plum, plum fish, small king fish, small xian, small spring fish, small cucumber fish, thick scales, flower fish. All belong to the class of bony fish, order of Perciformes, family of Sciaenidae, genus of yellow croaker.

Yellow croaker was once one of China's important economic fish. It is a local species unique to China and is widely distributed from the southern Yellow Sea in the north, through the East China Sea and the Taiwan Strait, to the east of the Leizhou Peninsula in the South China Sea. This fish is a warm-temperate schooling fish that often lives in the middle and lower layers of the nearshore waters within a depth of 60 meters. The breeding season of large yellow croaker is spring and autumn. During the breeding season, the fish migrate from the wintering areas in the open sea to the nearshore for reproduction in batches. As a precious economic fish, large yellow croaker has long been favored by consumers. However, due to overfishing, the resources have been severely damaged.

There are two geographical populations of small yellow croaker in the Yellow Sea and Bohai Sea: the northern population and the Lüsi population. The northern population hibernates in the south-central Yellow Sea and feeds and reproduces in the northern and Bohai coasts; the Lüsi population is larger and has a shorter seasonal migration distance, mainly moving east-west between deep and shallow waters in the southern Yellow Sea. Small yellow croaker begins reproductive migration from the wintering grounds in March and spawns in shallow coastal waters from April to May.

The author collected the yellow croaker broodstock in the southern Yellow Sea and the northern East China Sea, belonging to the Lüsi population. In May, the offshore small fishing boats of Putuo Dongji used small trawl nets to capture the yellow croakers in the Zhongjieshan fishing ground, which caused relatively light damage to the yellow croakers. Although the number was small, there were still surviving yellow croakers that could be captured. By July, nearly 150 people were organized to go out to sea 24 times with the boats, and more than 400 live yellow croakers were captured. After temporary breeding and transportation, only 16 remained.

2. Cultivation of small yellow croaker broodstock

After the yellow croaker broodstock are transported to the Aoshan Experimental Base of Zhoushan Fisheries Research Institute, they are bathed in a certain concentration of antibacterial drugs and then moved into earthen ponds and net cages for cultivation after stabilizing in the nursery pond for a period of time. When the water temperature in the sea area drops to 10℃, the broodstock are moved indoors for wintering.

1. Cage culture in earthen ponds During the cage culture process, the physical and chemical factors of the seawater in the earthen ponds are measured regularly, and the proportion of water change is determined according to the water quality to keep the water fresh. The bait organisms are mainly fresh small fish, which are fed twice a day, and the daily feeding amount is 5% to 10% of the total weight of the broodstock. A small amount of medicated bait is fed regularly to avoid the occurrence of fish diseases. The cages are replaced regularly, and a short-term medicated bath treatment is performed during the turning of the cages. The growth of small yellow croaker is measured every month, and the weight, total length and body length are recorded. On July 19, the average weight of small yellow croaker was 27.4g, the average total length was 15.2cm, and the average body length was 12.6cm; by December 19, the average weight of small yellow croaker was 53.6g, the average total length was 18.4cm, and the average body length was 15.3cm.

2. Indoor overwintering of broodstock When the water temperature of the earthen pond drops to about 10℃, the yellow croaker broodstock is moved indoors for cultivation. The indoor cement pond is 4.0m×8.0m×1.2m, slightly aerated, and the water temperature is controlled at 12℃～15℃, and the salinity is controlled at 22‰～30‰. Feeding is done twice a day and the sewage is sucked out. During the overwintering process, the gonads of the broodstock are cultivated at the same time, and the method of adding an appropriate amount of vitamin E to the bait organisms is adopted. Since most of the yellow croakers caught are one-year-old fish, the gonads cannot reach the requirements, so they were put into shallow sea cages on April 5, 2004 for further cultivation. It was found that the fish grew faster during the winter, which may be closely related to the bait organisms, environment and other factors. On January 20, the average weight of small yellow croaker was 69.4g, the average total length was 18.6cm, and the average body length was 15.5cm; as of the 5th of tomorrow, the average weight of small yellow croaker was 89.6g, the average total length was 21.8cm, and the average body length was 18.6cm.

3. Two-year-old broodstock culture in shallow sea cages Since two-year-old broodstock have strong swimming ability and to better simulate the actual breeding environment, the author's research group decided to conduct a shallow sea breeding experiment and moved the small yellow croaker into shallow sea cages in April 2004. The shallow sea cage breeding technology is basically the same as that of the earthen pond cage, but it was found that the growth rate of the fish body was not as fast as that of the earthen pond cage. On May 5, the average weight of the small yellow croaker was 8g.2g, the average total length was 22.1cm, and the average body length was 18.6cm; by December 6, the average weight of the small yellow croaker was 109.3g, the average total length was 23.0cm, and the average body length was 20.5cm.

4. Two-year-old broodstock overwintering indoors On December 6, 2004, the yellow croakers were moved indoors again for breeding and gonadal maturation. On January 6, the yellow croakers had an average weight of 117.4 g, an average total length of 23.6 cm, and an average body length of 21.2 cm; by March 25, the yellow croakers had an average weight of 135.6 g, an average total length of 25.0 cm, and an average body length of 22.6 cm.