CATDOLL : CATDOLL: There are many requirements for breeding live mandarin fish. What are the requirements for breeding live mandarin fish?

Mandarin fish, also known as mandarin fish, belongs to the genus Siniperca. It has a high and flat body with an elevated back. It has a large mouth, and the lower jaw is significantly longer than the upper jaw. There are small teeth of varying sizes on the upper and lower jaws, vomer, and valve bones. The rear edge of the anterior branchial valve bone is serrated, and there are four large spines on the lower edge. There are two large spines on the rear edge of the posterior branchial bone. The head is scaly with fine scales. The lateral line bends upward along the posterior arc. The dorsal fin is divided into two parts, connected to each other. The front part is a hard spine and the back is a soft fin. The body is yellow-green, the abdomen is grayish white, and there are irregular dark brown spots and patches on the sides of the body. There is a narrow black band from the tip of the snout through the eye socket to the front and lower part of the dorsal fin. The types of bait fish for pond culture of mandarin fish include silver carp, bighead carp, loach, mackerel, Thai carp, crucian carp, carp, etc. , the bait coefficient is generally 4-5. According to the growth specifications and food intake of sweet osmanthus fish, a pond 3-4 times larger than the sweet osmanthus fish pond is used to produce enough bait fish for sweet osmanthus fish to eat.

1-2 million fish fry (flowers) of silver carp, bighead carp, loach, mackerel, Thai carp, crucian carp, etc. Stock them in advance per acre in the pond where osmanthus fish are raised as early bait fish for osmanthus fish. Feed them with roughage such as peanut bran and wheat bran and cultivate them for 15-20 days. When the bait fish grows to 1.5-2.5 cm, use 0.7ppm copper sulfate and 0.5ppm strong chlorine to kill insects and disinfect them, and then put them into 2-3 cm osmanthus fish fry for cultivation. 200,000-300,000 fish fry such as mud carp, wheat carp, Thai carp, etc. are mixed in the four major fish ponds per acre. Silver carp, bighead carp, crucian carp and other fish fry can also be raised in special fish ponds as bait fish for large osmanthus fish. In addition to self-production and self-sufficiency, you can also buy them. In the late stage of breeding, it is generally winter, and the bait fish of shad are easy to freeze to death. Therefore, some cold-feeding bait fish such as silver carp, bighead carp, and crucian carp should be cultured in winter as backup bait fish for osmanthus fish in winter and spring.

Pond conditions: The pond area is generally 2-4 mu, the water depth is about 2 meters, it is mainly rectangular, the water quality is fresh, there is little or no silt at the bottom of the pond, and the drainage and aeration facilities are complete. According to the principle of good palatability and low economic cost, silver carp, white carp, bighead bream, silver carp, bighead carp and other fish fry can be selected as bait fish. Use the idle period before stocking to cultivate early bait fish in the pond. You can breed crucian carp or anchovy fry yourself, or put various fry about 20 days before stocking, with a stocking capacity of 400,000-600,000 per mu. The feeding method is to feed with soy milk or other feeds, while the bait fish in the middle and late stages should be fed in special ponds. It is advisable to adopt the method of high-density feeding in multiple ponds, staged fishing, and gradual drainage to ensure the synchronous growth of bait fish and mandarin fish.

At least there should be no polluted water source, and the water source should be sufficient. When building a pond, it is best to stay away from harmful places. For example, if there is a factory nearby, it is best not to build it nearby, otherwise it will easily pollute the water quality of the pond. I think that the pond for breeding mandarin fish should also meet the needs of convenient drainage and irrigation, so as to provide a better growth environment for mandarin fish. Everyone should pay attention that the injected water must be pollution-free. Mandarin fish is very dangerous in polluted water. Having said the water quality of the pond, let's talk about the bottom material of the pond. The pond for breeding mandarin fish should be free of silt, and the bottom of the pond should be relatively hard, so that mandarin fish can survive well in such an environment. So I think before breeding mandarin fish, you must first drain the water in the pond, then remove the excess silt, and then let the pond be exposed to the sun for a period of time until the bottom of the pond hardens. The above is the preparation work before breeding mandarin fish, and then you need to select the fry to be put in.

To breed mandarin fish, you need to build a breeding pond, which requires a sandy bottom, silt of about 15 cm, an area of ​​about 5 acres, a water depth of more than 1.5 m, good drainage and irrigation conditions, unpolluted water quality, and preferably flowing running water. The pond also needs a small amount of submerged aquatic plants.

The stocking density of mandarin fish in the pond should not be too high, which will easily affect the water quality. Therefore, the drainage and irrigation conditions of the pond must be good, and the water should be changed regularly.

Stocking density. First, you need to choose the right fry. Good mandarin fish fry have three characteristics: first, they are basically the same size; second, they are energetic and active; third, they have strong tails. Secondly, 1,500 to 1,800 fry can be placed in an acre of fish pond. However, for the first time breeding, the technology is not mature, so it is recommended to breed 1,000 fry to avoid a large number of casualties due to management difficulties.

Water quality requirements. In order to ensure good water quality, the fish pond must have a good drainage system, the water pool must be replaced regularly, and an aerator must be installed in the water pool. In addition, lime water must be sprinkled regularly for regulation.

Feeding. Mandarin fish mainly feed on small fish and shrimp. When feeding, you need to pay attention that mandarin fish fry cannot eat fish and shrimp larger than it. Therefore, you should feed fish and shrimp smaller than mandarin fish. For example, mandarin fish fry with a body length of 0.7cm can prey on other fish with a body length of 0.35cm, and mandarin fish with a body length of 31cm can prey on crucian carp with a body length of 15cm. The amount of feeding is between 10% and 15% of the mandarin fish's own body weight.

To ensure the survival rate of mandarin fish, we must do the most basic things, and a small number will also help our breeding management and reduce the occurrence of pests. The ideal density for breeding mandarin fish in one acre of fish pond is 1,400, which will also reduce the breeding of parasites. Mandarin fish are less likely to get sick during breeding, which is also one of its advantages. However, mandarin fish will have a large number of parasites during the period of growing raw skin. Since mandarin fish are carnivorous fish and like to eat live fish and live shrimps, which contain parasites, it is not very useful to use drugs to treat mandarin fish. Keep the fish pond clean and clean the harmful substances in the fish pond regularly. A reasonable breeding density can appropriately reduce the chance of pests.