What does the bass eat? How to breed it? What are the technologies? Attached to the analysis of market price

Perch has high nutritional value, and it is also a kind of high-value economic fish. It is distributed along the coast of China. It likes to inhabit estuaries and can also be traced back to freshwater areas of rivers. So what does it eat? How to breed it? What are the technologies? What's the market price like? According to the data of perch suborder, sea bass is a carnivorous fish with strong predation and large food intake. Adult fish often look for food alone and like to eat small fish and shrimp. The type of food varies according to the size of the fish. The fry within one month after hatching mainly feed on rotifers and small crustaceans. When the total length reaches 5ml / 6cm, it eats a lot of aquatic insects and fish fry. When the total length is more than 10 cm, other small fish are often used as staple food. When feed is insufficient, the phenomenon of cannibalism often occurs.

How do you raise sea bass? What are the technologies?

Sea bass live mostly in coastal rivers and rivers and belong to a kind of brackish and freshwater fish. This fish is very large, the largest can reach more than 20 kilograms. This kind of fish carries a large number of eggs, and some parent fish can carry more than 100 million eggs.

Sea bass live in shallow estuaries and are suitable for salinity. the seedlings hatch in seawater with a salinity of about 22 ‰, then go up to the estuary where salt and fresh water meet, and can find food and grow in fresh water, but most adult fish live in salt and fresh water. Sea bass is a ferocious carnivorous fish with a food intake of up to 5% of body weight. The predation intensity is strongest in spring and summer. Fish fry use fleeces and prawns as bait, and when they reach 10 cm long, they prey on small fish and shrimp. The growth rate of sea bass is relatively fast, the breeding period is generally from November to January of the following year, and the fry grow to the end of the year with a body length of 25 cm and a weight of 0? 5 jin, 6-year-old fish body length up to 0? 8 meters, the largest individual is 1 meter long and weighs 1520 kilograms. Cultured sea bass grow faster and can reach more than one jin in 280 days. The perch can forage and grow normally when the water temperature is above 14 ℃, and it can survive the winter naturally in this area.

Sea bass can grow in fresh water, but according to its natural habits, it is better to be in the brackish fresh water where the sea tide arrives, and the fish and reclamation area in the estuary of the river is the best, and the salinity of the water quality can be less than 5 ‰. The growth rate of aquaculture is slow in the waters with high salinity.

Culture techniques:

1. Pond conditions and preparations

The area of the pond should be 3300m2-6600m2, the water depth is more than 2m, the water source is sufficient, the water quality is pollution-free, and the water intake and drainage facilities are good and the transportation is convenient. Before stocking, dry ponds should be desilted and slope protection should be leveled. Use 750 kg of quicklime per hectare-1050 kg per hectare, keep pool water 10-20 cm, soak and pour wine. 7 days later, add water to the depth of lm. In order to keep the water quality in good condition, ammonium ammonium 75 kg / hm2 can be applied once. After two days, the water in the pond turns oil-green and can be stocked.

2. Temporary rearing and stocking of fish species

At present, most of the sea bass seedlings are caught by the sea, and the sea catch seedlings in spring are about 2.5 cm to 4 cm. The fish will be injured in varying degrees after fishing and transportation. in order to improve the survival rate of culture, temporary culture can be carried out first. In the temporary culture mode, it is more convenient to set up 40 mesh cages in the pond. 2000-3000 seedlings per cubic meter of water were temporarily raised, disinfected with 1 × 10-6-2 × 10-6 chloramphenicol, and furazolidone after eating surimi.

In the first 10 days, Artemia larvae or freshwater horns and copepods were fed, and then fresh surimi was fed. The fry are cultured to about 10 cm and put into the pond at the rate of 1.5 / m2.

3. Nurturance management

① throw Hello

The bait is mainly composed of low-yielding mixed fish, supplemented by human mackerel ingredients. The sea bass grabs food quickly and contains a lot of food, so it is very important to feed it regularly and quantitatively. When feeding, you should know that the fish are full and don't waste bait. In each feeding, the amount of feeding should be increased when the fish is attracted to the surface to grab food, and the feeding should be stopped when the fish sinks and does not grab the food. the daily bait times and amount vary according to the season. The sea bass was fed 4-5 times a day in the temperature season for rapid growth, 10-30% of the fish body weight, and 2-3 times a day in the early spring and late autumn of low temperature, accounting for 1-10% of the fish body weight.

② pond inspection

Patrol the pond in the morning and evening, and deal with the abnormal in time. The contents of pond inspection include fish activity, changes in pond color, smell, transparency, pond escape prevention facilities and enemy damage, and so on.

Attached: analysis of market price

1. Sea bass is a kind of delicious fish, and it is also a kind of economic fish with high value, which can be eaten in our daily life. Sea bass culture is also a kind of culture project with important prospects and economic benefits. The economic value of sea bass is considerable. The meat quality of sea bass is solid and white, not only has high nutritional value but also tastes delicious.

2. Bass can be divided into white perch and black perch because of their different skin color. The black spots of the black perch are not obvious, except for the gray-white abdomen, the back is bronzed or dark brown, while the white perch is white with irregular black spots on both sides. The market price of sea bass is different in different places, and the price is also different with different sizes. The wild bass on the market is about 25 yuan per jin, the fresh sea bass is about 20 yuan per jin, and the fresh freshwater bass is about 18 yuan per jin. The price fluctuates every month, and the selling price should be higher.

3. The stock of sea bass is small, the market demand is large, the fish price is rising rapidly, and the breeding of sea bass is not very extensive, but the nutritional value of sea bass is very high, and there is a certain dietary value. After the development of the past few years, the market price of sea bass has tended to be stable, and the price has not fluctuated greatly in recent years. Therefore, if the sea bass industry wants to create more profits, it needs to make efforts on culture technology. Scientific breeding of sea bass can increase the output and reduce the input of feed at the same time, in order to obtain greater profits. The majority of farmers might as well explore more market trends and market, reasonably adjust their own breeding plans, and strive for higher farming benefits.