The cultivation method of perch fry in the culture of perch

The fry of sea bass can be cultivated in ponds, cement ponds, fiberglass sinks, canvas sinks or in cages. There are many people who breed perch in our country, because the perch has few thorns, so it is deeply liked by people.

The cultivation method of perch fry in the culture of perch

1. There are no strict regulations on the specifications of cement ponds used to cultivate sea bass fry. The small ones are generally 5 cubic meters to 30 cubic meters with a water depth of 0.7 meters to 1.3 meters, while the large ponds are generally 50 to 200 cubic meters with a water depth of 1.5 meters to 2 meters.

The shape of the pool is varied, including rectangle, square, circle, oval, polygon and so on. From the point of view of the cultivation effect, the small pool is easier to control, operate and manage than the large pool, and the survival rate of raising seedlings is higher, but the operation is more troublesome; the large pool is more suitable for large-scale enterprise production and can obtain higher total yield. but it is difficult to control and manage, especially when there is a disease epidemic. As the shape of the pool, round and octagonal are better. In our country, productive seedling raising is mostly carried out in cement ponds.

2. If cultivated in a pond, it is better to have a pond area of 600 square meters-1,300 square meters and a water depth of about 1 meter. Sufficient water sources, good water quality and convenient drainage and irrigation are required.

3. When cultivating with cages, the appropriate specifications of cages are 2 m × 2 m × 3 m or 3 m × 3 m × 3 m, that is, covered cages with an area of 4 square meters-9 square meters and a depth of 3 meters. The mesh is knotless mesh, double layer, mesh 0.6 cm-1 cm. The cage can be set in the sea area or in freshwater lakes, reservoirs and other water bodies, which is a floating cage.

As a body of water or facilities for cultivating sea bass fry, it must be strictly disinfected before stocking. The commonly used disinfection drugs are quicklime, bleach, trichloroisocyanuric acid and so on.

Pond cultivation is generally disinfected with quicklime, the specific method is: about 10 days before the release of fish fry, every 100 square meters of water with quicklime 20 kg-25 kg whole pond sprinkle. Cement ponds, other types of sinks or cages are disinfected with bleach or trichloroisocyanuric acid.

Choose the key points of sea bass

High quality perch:

1. The best size is about 750 grams. It is too small to have much meat. The days of growth are not enough. The meat becomes rough when it is too big.

2, the fish body is smooth and natural, no damage, swimming agile. The body is bluish, and the fish scales are shiny and transparent.

3. If it is sea bass, it may smell like sea water or seaweed.

4, if the dead fish, the gills are bright red, the epidermis and scales do not fall off, full of elasticity, fish eyes are clear and transparent without turbidity, no red silk, no signs of injury is better.

Inferior bass:

1. If the cornea of one eye or both eyes is partially or completely cloudy, it is a fish with eye injury.

2. The tail is red, indicating that the fish is physically damaged and will die soon after buying it home.

3. The fish is long and round, and the belly of the fish is too high, which shows that the merchants feed the fish too much feed before selling the fish, and they will die soon.

4. Frozen fish, the meat color is dull, the meat is soft and inelastic, and it is not glossy and not fresh.

5. Note: sea bass belong to "coral reef fish" and like to grow near coral bushes. As there may be a toxic substance called "snow toxin" on coral bushes, when eating seafood bass, you must not eat its internal organs, fish heads and other parts. Sea bass often have parasites, so it is best not to eat raw.

Economic value of sea bass

Sea bass has high economic value, its meat is solid, white, tender and smooth, the meat is delicious and nutritious. According to analysis, every 100 grams of fish contains 17.5 grams of protein, 3.1 grams of fat, ash and calcium, phosphorus, iron and other ingredients, is the restaurant banquet of valuable seafood, but also the export of valuable aquatic products. Especially the mature perch in late autumn and early winter is very fat, and the nutrients accumulated in the fish are the most abundant, so it is the best time to eat perch.

The sea bass is especially famous for the Songjiang perch, which is called the four famous fish in China along with the Yellow River carp, the Yangtze River shad and the Taihu Lake silverfish. Perch also has high medicinal value, with the effect of tonifying liver and kidney, tonifying spleen and stomach, resolving phlegm and relieving cough, and can treat fetal movement restlessness, postpartum lack of milk and other diseases. According to the records of the medicine book, its flesh is sweet and warm, has the function of nourishing and recuperating the stomach, can treat moisture, indigestion in children, and can calm the fetus, so sea bass is a valuable seafood with excellent medicine and food, and is deeply welcomed by consumers in the mainland, Hong Kong, Macao and other places.

Nutritional value of sea bass

1. Protein

Sea bass, like other fish, is rich in protein, which is very helpful to our physical development and nutritional supplement. And the protein of sea bass belongs to high-quality protein, which contains a variety of amino acids that our human body needs. These amino acids can participate in the metabolism of fat and protein in our bodies, thus strengthening our physique. At the same time, the amino acids contained in sea bass can also nourish our brain cells. It's very helpful for us to replenish our brains. Especially for elderly friends, eating more bass can prevent Alzheimer's disease.

Vitamins

In addition to the above nutrients, sea bass is also rich in vitamins, most of which are vitamin B and vitamin A. Vitamin A not only promotes our physical development, but also helps our eyes. Studies have shown that vitamin A deficiency can lead to a series of eye diseases such as myopia and night blindness. So people who use their eyes too often, such as office workers facing computers and students who read books, eating more perch can protect their eyesight. Vitamin B plays a vital role in the regulation of our body's metabolism. People with bad intestines and stomach should eat more perch.

3. Promoting lactation and calming the fetus

Perch also has the effect of lactation, pregnant women eat perch can not only supplement nutrition, but also the role of lactation. It has a good effect on the improvement of milk after production. And perch is a low-fat and low-cholesterol nutritious food, often eating will not cause obesity and high cholesterol and other symptoms of overnutrition. And it is clinically proved that eating perch during pregnancy has a good calming effect, can treat fetal movement, and has a certain preventive effect on fetal deformities and dystocia, so perch is the most suitable for expectant mothers.

4. Medicinal value

Sea bass is not only delicious, but also rich in medicinal value. A medicinal diet made of sea bass can treat indigestion, edema and other diseases. And traditional Chinese medicine believes that sea bass can also relieve cough and tonify the liver and kidney. But it should be noted here that although the sea bass is good, the liver of the sea bass is inedible. Eating the liver of the sea bass may cause poisoning to us. Therefore, when dealing with perch, it is appropriate to remove the liver first. And do not drink milk before and after eating bass, otherwise it will cause nausea and diarrhea.

From the above analysis, we know that sea bass not only has a certain nutritional value, it also has a high economic value, so for sea bass farmers, its culture profit is very high, so sea bass has a lot of room for development.