The size of the stocking pond for snakehead parent fish should be determined according to the amount of each reproduction. For example, 50~70 pairs can be cultured at a time, and basically according to the principle of stocking per 10 square meter 1 pair, choose a pond of 0.6~ 1 mu; If only 30~40 pairs can be cultured at a time, choose a pond of 0.3~0.6 mu. Because snakehead trawling rate is low.

2. Preparation before stocking

Do a good job of cleaning and disinfection of fish ponds before stocking, and generally use dry pond disinfection. If the silt is too thick, it is necessary to dig out too much silt and leave it about 20 cm deep. Clean the pond with 50~75 kilograms of quicklime per mu, and inject water 10 day to stock the parent fish. A small number of aquatic plants, such as water peanuts and water hyacinths, are cultivated in the pond for the shelter and habitat of snakehead.

3, parent fish stocking point

The key to stocking parent fish is density, time and male-female ratio. The density is generally 0/00 ~150kg per mu, with a maximum of 200kg. It depends on the size of the parent fish, generally 150~250. Density should not be too high or too low, too high will affect the activity space of parent fish, too low will not be easy to domesticate, especially wild parent fish, which will affect the gonad development of parent fish. The time is set for September.

4. The requirements of snakehead for spawning ground

Snakehead has two requirements for spawning grounds: first, there are lush aquatic plants around lakes, ponds and ditches, and the bottom material is silt; Second, the shallow water area is near the water to avoid the wind. Snakehead has the habit of nesting and needs aquatic plants, so whether there are aquatic plants in the spawning ground has a lot to do with the water depth. It is reported that snakehead spawns early in reed silk and late in verticillium.

Extended data:

Living habits of snakehead:

Snakehead is a kind of freshwater benthic fish, which usually inhabits the waters with overgrown aquatic plants or muddy sediments, and is distributed in rivers, lakes, reservoirs, ponds, paddy fields and other waters. It has strong adaptability to environmental factors in water, especially to dissolved oxygen, water temperature and water quality.

When the water is short of oxygen, it can breathe on the water with the help of the auxiliary respiratory organs of the suprabranchial cavity. Snakehead can survive at 0~4 1℃, and 16~30℃ is the optimum temperature for its growth, development and reproduction. When the water temperature returns to above 8℃ in spring, it generally moves in the middle and upper water bodies.

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