CATDOLL : CATDOLL: Bighead carp breeding technology with a yield of 5,000 jin per mu, the difference between bighead carp and silver carp

1. The breeding technology of bighead carp with a yield of 5,000 jin per mu, the difference between bighead carp and silver carp

1. Pond selection: Bighead carp is suitable for pond breeding. The area of ​​the breeding pond is 1/151/15hm2 and the depth of the pond is about 2 meters. 2. Stocking of fry: The fish species are selected with large size of about 13.2 cm. The fish species need to be quarantined and disinfected before stocking. Stocking needs to be carried out in winter when the water temperature is 5-10 degrees. 3. Water quality: The pond water needs to be replaced from time to time to ensure the freshness of the pond water. 4. Feeding and management: You can feed wheat bran, bran, cakes, fish meal and other feeds, and scientifically match them for breeding.

1. Breeding technology for bighead carp with a yield of 5,000 jin per mu

1. Pond selection:

(1) You need to choose a pond, reservoir, lake, etc. with sufficient water, ventilation and light. The area of ​​the breeding pond should be 1/151/15hm2, the water depth should be about 2 meters, and 20-30 cm of silt can be retained at the bottom of the pond.

(2) The embankment of the breeding pond needs to be strong and impermeable, the bottom of the pond needs to be flat and free of aquatic plants, and it needs to be cleaned and tidied before the fry are released.

2. Stocking of fish fry:

(1) Bighead carp fry need to be large in size, generally 13.2 cm in length, or 0.3-1 catties per fish.

(2) Fish species must be quarantined for diseases before being released into the ponds to prevent fish species carrying infectious diseases from entering the ponds. Each bighead carp must be disinfected before entering the ponds to prevent it from carrying pathogens.

(3) Fish should be released in winter or early spring when the water temperature is between 5 and 10 degrees Celsius, which is conducive to the transportation of fish or reduces the stress caused by environmental inadaptability during release.

(4) Bighead carp can be raised together with other fish species, such as silver carp, according to their habits.

3. Water quality:

(1) Bighead carp likes oxygen, so the dissolved oxygen content in the water must be sufficient. During the breeding period, an aerator is required.

(2) The water quality needs to be kept fresh, and the water transparency should be controlled at around 28-45 cm. When the bighead carp reaches 8-10 cm in size, the water transparency needs to be above 30 cm to prevent the fish from contracting black gill disease.

(3) During daily management, water needs to be changed based on water color, transparency and cleanliness. Pool water needs to be changed regularly to ensure water quality.

4. Feeding and management:

(1) Bighead carp can be fed with feeds such as wheat bran, bran, cakes, and fish meal. A scientific ratio needs to be made based on the breeding conditions of bighead carp in the pond, and generally it needs to contain more than 30% crude protein.

(2) In summer when the water temperature is high, the growth rate of bighead carp is accelerated. Therefore, more feeding can be done to accelerate the growth of bighead carp.

2. The difference between bighead carp and silver carp

1. Different families:

(1) Bighead carp: It belongs to the genus Bighead carp, family Cyprinidae, order Cypriniformes.

(2) Silver carp: It belongs to the Cyprinidae family, Cyprinidae genus.

2. Differences in habits:

(1) Bighead carp: It has a docile personality and prefers quietness. It does not often jump or swim on the water surface.

(2) Silver carp: They are active and impatient, and often swim and jump on the water surface.

3. Difference in appearance:

(1) Bighead carp: Bighead carp has a larger head and a darker body with dark patterns on its body surface.

(2) Silver carp: Its body is lighter in color, silver-gray, with small scales and a head that is not as big as that of bighead carp.

2. Advantages and disadvantages of bighead carp

The advantages of bighead carp are that it is easy to raise and has a high survival rate. The disadvantages are that the breeding cycle is also long, and the size of the fish on the market is not very large. Bighead carp feed includes green feed and concentrated feed. Green feed is all non-toxic green plants that can be eaten by it. Concentrated feed: It is a high-quality feed containing high protein and fat, such as peanut cake, rapeseed cake, rice bran, wheat bran, corn, silkworm pupae, bean dregs, distiller's grains, etc.

Fertilizers for bighead carp include organic fertilizers and inorganic fertilizers. Organic fertilizers are fertilizers with longer fertilizer effects and more comprehensive nutrients. They include various well-rotted green manures, poultry and livestock manure, etc. Inorganic fertilizers are quick-acting fertilizers with relatively simple nutrients. They include nitrogen fertilizers, phosphorus fertilizers, and potassium fertilizers.

Pond fish farming should adopt mixed culture to give full play to the production potential of the water body and achieve high yield. Bighead carp lives in the upper layer of the pond water and mainly feeds on zooplankton. It can be mixed with grass carp, bream, bighead carp, black carp, tilapia and other fish that live in the middle, lower and bottom layers.

3. Growth and reproduction of bighead carp

When they reach sexual maturity, they go to the river to spawn. After spawning, most individuals enter the lakes along the river to feed and fatten. In winter, when the water level of the lakes drops, they return to the deep waters of the rivers to hibernate. In the warm spring of the following year, they swim upstream to reproduce. Bighead carp lays drifting eggs. Sexual maturity is 4-5 years old, and the youngest male fish is 3 years old. The breeding season is from April to July. The spawning grounds are mostly on the undulating riverbed. When the river basin rains, the water level rises suddenly and the flow rate increases, they reproduce.

The spawning season is usually from early May to mid-June. The mature individuals are also relatively small. Generally, female fish weighing more than 3 kg can reach maturity. The relative egg-carrying capacity of female fish weighing about 5 kg is about 40,000-50,000 eggs per kg of body weight, and the spawning period is similar to that of grass carp. The absolute egg-carrying capacity is 200,000-250,000 eggs. In natural water bodies such as rivers and lakes, individuals weighing more than 10 kg can usually be seen, and the largest can reach 50 kg. In pond culture, under the condition of sufficient feed, a one-year-old fish can weigh 0.8 to 1 kg. The initial mature individuals are heavy; in some areas, they need to be more than 10 kg, but in Guangxi and Guangdong, usually less than 10 kg can also spawn.