CATDOLL : CATDOLL: What is the ratio of the four major fish fry in one acre of fish pond?

What is the ratio of the four major fish fry in one acre of fish pond?

If feeding is done occasionally, 100-300 grass carp, 200-300 crucian carp, 50-100 silver carp, 30-50 bighead carp and 10 black carp can be put into each acre.

The above stocking ratio is suitable for intensive fish ponds with a water depth of about 2 meters. If the feed, grass sources, water sources and oxygenation equipment are complete, the number of grass carp can be appropriately increased by 30%. Other fish do not need to be increased and can be sold in the same year.

Grass carp distribution

In China, it is distributed from Heilongjiang to Yuanjiang in Yunnan (except Tibet and Xinjiang), and has been transplanted to countries in Asia, Europe, America, Africa, etc. Grass carp is naturally distributed in China, Russia and Bulgaria, and is mainly distributed in the Yangtze River, Pearl River and Heilongjiang River systems in China.

The grass carp in the Heilongjiang River system entered the Heilongjiang River system from the river plain area before the Pliocene, when the Nenjiang River was connected with the Liaohe River and the Bohai Sea. The lower reaches can reach Xingkai Lake slightly above Aihui and Qiqihar.

The grass carp in the Pearl River system may have expanded from the lower reaches of the Yangtze River and Qiantang River to the Pearl River system during the glacial period when the sea level was 100 meters lower than it is now and the Taiwan Strait was a low plain. It may have reached Quanzhou, Du'an and Baise.

Malaysia first introduced grass carp from China in the 1980s. Grass carp has been introduced to 93 countries, some from China, such as India, the United States, Hungary, Mexico, and some from other countries, such as Sudan (introduced from India) and Sweden (introduced from Hungary). Grass carp has formed populations in Malaysia, the United States, etc. The initial purpose of introduction was mainly to control aquatic weeds and for breeding, such as the United States, Egypt, India, etc.

What are the four major carps, and which one has the highest economic benefits in farming?

There are four kinds of fish, and the economic benefits of breeding black fish are the highest. There are many varieties of edible fish now, such as black fish, crucian carp, bighead carp, silver carp, grass carp, herring, etc., which makes consumers have many choices. Therefore, for farmers, they should breed fish with certain advantages among many fish varieties such as catfish. Catfish is a relatively common fish in the market. It has a high market demand, rich nutrition, and excellent taste, so it can be considered for breeding. So, how much profit can a pond bring for catfish? Catfish can be intensively farmed and high-density farmed, and the yield per mu can reach 10,000 catties.

According to the current market purchase price of catfish, 3 to 5 yuan per catty, the output value per mu can reach 30,000 to 50,000 yuan. The cost of catfish farming, including 0.28 yuan per tail seedling, feed, water and electricity, and labor, is not less than 10,000 yuan. In this way, one mu of catfish can bring farmers a profit of 20,000 to 40,000 yuan, and the breeding efficiency is very high. More importantly, the catfish breeding cycle is very short, and it can be sold in 80 to 90 days. Therefore, two batches can be bred in a year, and the annual net income exceeds 40,000 yuan, which is much better than going out to work. In order to better breed catfish and achieve high yields, the best growth environment must be provided. The optimal growth temperature for catfish is 18 to 28 degrees Celsius, the pH value is 7.5, and the water quality is changed regularly to maintain the water quality.

Water quality directly affects the growth of catfish. Therefore, in the process of catfish breeding, we must observe the water quality and find that the water quality can be changed. It is recommended to change the water every half a month, and 30% of the water can be replaced each time; oxygenate the water tank. Due to the high breeding density, catfish have a high requirement for dissolved oxygen, so the dissolved oxygen in the water body cannot be less, and an oxygen generator can be set up. In addition, attention should be paid to the prevention of catfish diseases, such as indiscriminate killing and indiscriminate injury diseases, which are generally thrown out in less than a month, causing blisters on the fry and red and swollen fins.

If things are not done in time, the fry will eventually rot and die. What fish are profitable to farm in fish ponds now? In order to obtain high profits, it is very necessary to breed rare fish, because rare fish can get high returns. Fish farming, this fish is now a very expensive product. It is said that the market price in some places is as high as 200 yuan/jin. Why is it so expensive? It is mainly because fish are very picky about the aquaculture environment. The first quality requires freshness, sufficient dissolved oxygen, and no pollution. It mainly feeds on small fish and shrimps in the pond. So it is easy to breed. At present, with the breakthrough of breeding technology, some farmers can reach 120~150 kilograms per mu, plus sporadic high prices, the profit is considerable.

The easiest ones to recognize are silver carp and bighead carp. Silver carp is divided into silver carp and silver carp. The heads of silver carp and bighead carp are both relatively large, but the head of bighead carp is larger than that of silver carp. The ratio of head length to body length is about 1:3. People call it fathead fish. Silver carp is also called bighead fish. Like bighead carp, it is the first choice for making chopped pepper fish head. Black carp and grass carp are indeed very similar, but the colors can still be identified. The color of black carp is darker, while the color of grass carp is lighter. I think it is more profitable to farm black carp. Because more people eat it.

Among black carp, grass carp, silver carp and bighead carp, farming grass carp has the highest economic benefits, the highest nutritional value and the lowest fat content.

Black carp, grass carp, bighead carp and silver carp; I think breeding black carp is relatively the best and has higher returns.