The varieties of high-grade freshwater fish culture mainly include whitebait in Taihu Lake, carp in Yellow River, dinggui fish, pincer fish, Wuchang fish and bamboo tube fish. 1, Taihu whitebait: Because of its tender meat and rich nutrition, it is also called fish ginseng. 2. Yellow River Carp: It is one of the four famous fish in China, with bright color, plump figure, plump meat and rich nutrition. 3. Ding Guiyu: Its meat is tender and delicious, and its nutritional value is also high. It is called the Royal pet fish. 4. Pinctada: It is not only a large warm-water freshwater fish, but also a world-famous breeding variety. Its meat is thick and spineless, belonging to benthic fish.

First, high-grade freshwater fish breeding varieties.

1, whitebait in Taihu Lake

(1) Because the whitebait in Taihu Lake is round in shape and transparent in color, it is somewhat similar to silver and has no bones, so it is called whitebait.

(2) There are four kinds of whitebait in Taihu Lake, namely whitebait, whitebait, whitebait and whitebait. Taihu whitebait is also called fish ginseng because of its tender meat, white tenderness and rich nutrition.

2. Yellow River carp

(1) Yellow River carp, perch from Songjiang, fish from Xingkai Lake and salmon from Songhua River are called the four famous fish in China. It has bright color, tender and delicious meat, fragrant smell and rich nutrition. This is my precious fish resource in China.

(2) Yellow River carp has golden scales, dark back and pale white abdomen, but its body is usually plump and fleshy.

3. Ding Guiyu

(1) In Europe, the turtle is called the Royal pet fish. Its body colors are green, yellow, blue and white. Its meat is tender and delicious, and its nutritional value is extremely high. Therefore, it is also one of the main economic fish in freshwater culture in European countries.

(2) Ding Gui fish belongs to freshwater benthic fish, and often inhabits still water with many aquatic plants and slow flowing water at the bottom of silt. In winter, dinggui fish inhabits deep water and has strong cold tolerance, so it is a wide-temperature fish.

4. Pliers

(1) Pinctada is relatively long, and the front is usually wider than the back. Its surface is smooth and scale-free, rich in mucus, sticky and stingless, and its nutritional value is extremely high, so it is deeply loved by consumers.

(2) Pinctada is a benthic fish, which usually lives at the bottom of lakes and rivers, with gravel and stones. It has the habit of sleeping during the day and coming out at night. Strong adaptability, fast growth, easy to raise and easy to catch. It is a large-scale warm-water freshwater fish and a world-famous breeding variety.

5. Wuchang fish

(1) Wuchang fish is a kind of freshwater fish, mainly living in the middle and lower layers of water and still water in lakes and reservoirs. Usually, it mainly eats aquatic vascular plants and periphytons, but it also eats horny, copepods and chironomid larvae.

(2) Wuchang fish is an important herbivorous economic fish in China, which can usually spawn and breed in ponds, with high survival rate, fast growth rate, high meat content and easy feeding and fishing, so it is welcomed by most consumers.

6, bamboo tube fish

(1) Phyllostachys pubescens is one of the valuable economic fish. It is green in color, likes to move in deep water with fresh and flowing water quality, and prefers not to swim in water surface or shallow water level. It often lives in rivers or ravines with fast flowing water.

(2) Bamboo has diverse food habits, and likes duckweed, vegetables, young leaves and artificial compound feed. Strong disease resistance, high reproductive efficiency, fat and tender meat, which is a good raw material for making sashimi and braised fish.

Second, what kind of fish is good in freshwater fish?

1, good fish

Among freshwater fish, grass carp is generally easier to raise. It is not only one of the four largest fish in China, but also an important freshwater cultured fish in China, with its output value and output ranking among the top in the world.

2. Key points of aquaculture technology

(1) When raising grass carp, it is necessary to build a pond with a proper size, with a flat bottom and no low-lying places, and at the same time, ensure sufficient water and good water quality in the pond, and clean and disinfect the pond before releasing fry to ensure a suitable growth environment.

(2) We should choose healthy and lively fry, release them when the weather is clear and windless, and pay attention to controlling the release density to ensure that grass carp has enough room for growth. It should be noted that before putting the fry, the fish must be disinfected before putting them in.

(3) Generally, the feed is mainly granular feed, and the content of protein in the feed is required to be about 28-32%, supplemented by green feed, which is generally fed twice a day, and the feeding amount is appropriate for grass carp to eat 80% full within 2 hours. It should be noted that after feeding granular feed continuously for a period of time, it is necessary to stop feeding granular feed 1 week, and feed raw grain feed at intervals, and at the same time fish out food residues in time to ensure the cleanliness of the water body.

(4) Visit fish ponds frequently to observe the situation of grass carp. When oxygen deficiency is found, the aerator should be turned on in time to increase oxygen, so as to ensure that there is enough oxygen content in the water, especially in rainy days. At ordinary times, the water should be changed regularly for disinfection, so as to ensure that the water quality is clean, pay attention to the prevention and treatment of fish diseases, and ensure that grass carp has a suitable growth environment.

(5) The PH value of the pool water should be 7.5-8.5, the transparency of the pool water should be about 30cm, and the dissolved oxygen can be kept at about 20mg/L. ..