Breeding techniques of freshwater perch

Perch is a kind of fish that can live not only in sea water but also in fresh water. Nowadays, freshwater bass are mainly farmed, among which California perch is more famous. The meat of sea bass is delicate, delicious, favored by consumers, many breeding friends are introduced breeding, do not breed on their own, so do you know how to breed bass? Let's take a look at the pro-farm network.

1. Cultivate parent fish

Choose large fish of 1-3 winter age and weight of 1-4 jin as parent fish, the area of the cultivation site is larger, the water quality is better, the dissolved oxygen in the water body is higher, and it can be mixed with other edible fish, or raised alone in a pond with micro-running water and convenient drainage and irrigation. The water depth is about 2 meters, and the best area is 2-3 mu. Convenient management, generally cultivate about 100 parent fish per mu, can also be equipped with some bighead carp, can adjust the water quality, release some small fish and shrimp as breeding, the daily feeding amount is 3% of the body weight of parent fish, centralized feeding is carried out one month before parent fish spawning.

2. Fish selection

After doing a good job of breeding parent fish, we should begin to select fish species and distinguish between male and female. As for how to distinguish between male and female sea bass, it is necessary to judge them according to their body size and reproductive structure. The female fish is thick and short. In the spawning season, the abdomen of the fish is dilated and soft, the press is elastic, the urogenital nipple is slightly convex and reddish, and there are two holes, namely the fallopian tube and the ureter opening. The male fish is long and thin, with no obvious protuberance in the abdomen, sunken urogenital nipple and only one hole during the breeding period.

3. Build a spawning site

The spawning site can choose to build a cement pool, the size area depends on the breeding scale, in and around the pool, polyethylene mesh is used to build spawning nests, the net is pressed with stones, and the middle of the net is covered with pebbles. Disinfection and alkali removal should be carried out before releasing the fish to prevent excessive alkalinity from causing the fish to die. If you choose to use the pond as the spawning site, you should first clear the pond and disinfect it. After repeating the operation of the cement pond, everyone will lay eggs.

4. To induce labor

In March-May every year, when the water temperature is maintained at 18-35 degrees Celsius, a female fish is injected into the pituitary gland of carp, generally according to the body weight, the injection dose is 5-6 mg per kg, while the male fish is halved on this basis, which usually takes 20 hours to have an effect.

5. Insemination

After injection, the perch is placed in the spawning ground at 1:1 to lay eggs. Generally, 20 or 30 pairs of parent fish are released per mu. After they are put in, they will pair up by themselves, and the males will build nests quickly. The female fish will lay the eggs in the nest, and the eggs will stick to the net and pebbles, and then they will protect the eggs. After laying eggs, they should ensure adequate bait to prevent the parent fish from eating the eggs because of hunger. After all the eggs hatch out of the fry, the parent fish will be fished out in time to complete reproduction.

The above is the breeding technology of freshwater bass brought by the pro-agricultural network. I hope it can help you. If you want to know more about perch culture, please pay attention to the pro-agricultural network.