Culture techniques of Pseudosciaena Crocea

Large yellow croaker, also known as yellow croaker, king fish, big yellow croaker, its whole body golden, excellent identification, one of the four traditional seafood, is the main economic fish in China's coastal areas. Its taste delicious, high nutritional value, its fish bladder can be used as fish glue, have hemostatic effect, deeply loved by consumers, after years of practice in our country, its breeding technology is also more mature, let's take a look at its breeding technology.

1. Cultivation conditions

Can choose pond culture, pond requirements close to the water source, and convenient irrigation, can change water every day, pond area depends on the scale of culture, pond to be 2-3 meters deep. The transparency of the pool water should be more than half a meter, the water temperature should be kept at 8-28 degrees, the dissolved oxygen should be kept above 5 ml per liter, and the pool water is alkaline. Before stocking, pond cleaning and disinfection should be carried out to eliminate harmful bacteria and microorganisms in the pond. First, water should be poured into the pond for 10-20cm. Quicklime should be sprinkled in the whole pond. Generally, 100-150 kg quicklime should be sprinkled per mu. After sprinkling for one week, water should be drained.

2. Seedling

The time of seedling release is in the middle and late April or early May, when the water temperature is suitable for the growth of fry, the seedling release should pay attention to the neat and consistent specification requirements, which is conducive to management. If the specification difference is too large, it will cause the phenomenon of food grabbing, which is unfavorable for feeding management. General fry specifications in 100 grams per tail, stocking density control in about 500-700 tail per mu. It is best to temporarily raise it for a period of time before stocking, so that it can adapt to the new environment, so as not to cause unnecessary losses.

3. Feed feeding

During the juvenile period, large yellow croaker mainly feeds on copepods, mysis, krill and other zooplankton, while adult fish mainly feed on fish or shrimp crustaceans. Artificial culture generally selects frozen upper fish as the main part, matches other bait, cuts the frozen fish into palatable fish pieces and feeds them, or grinds them into meat paste, stirs them into sticky lump bait, and then extrudes them into different sizes of lumps to feed them. Other nutrients, such as vitamins and other drugs, can also be added when stirring meat paste. Feeding once a day in the morning and evening, large yellow croaker has the characteristics of slow feeding and small amount, so feeding should be slow, feeding amount depends on water temperature, weather and fish feeding.

4. Schedule management

Do a good job of daily inspection and water quality management, insist on inspecting the pond once a day in the morning, noon and evening, especially in high temperature or heavy rain, and do a good job of inspection in the morning and evening. Carefully observe the activities of fish and find any abnormal problems to be dealt with in time, such as floating head and flooding phenomenon, which is generally caused by lack of oxygen in water, so it is necessary to timely enter water or increase oxygen, so that fish food intake suddenly decreases, which may be caused by diseases. Pond water is best changed once a day, each time depending on the water quality, such as heavy rain, the surface layer has a lot of fresh water, easy to cause the phenomenon of lower hypoxia, so to timely discharge the surface fresh water, such as water injection after the rain, in addition to regular disinfection treatment.

The above is big yellow croaker breeding technology, hope to help you, want to know more rhubarb breeding knowledge, please pay attention to us.