How to raise wheat ear fish how to raise wheat ear fish culture technology fish points for attention

Fish is a very common aquatic animal in our life, there are many kinds of fish, wheat ear fish is one of them. Wheat ear fish has a very high economic value, not only as bait, but also as a delicacy. So do you know how to raise barley fish? Let's learn about the breeding techniques of wheat ear fish together with the editor.

How to raise wheat spike fish

1. Daily management

From late March, we began to flush every 5 days for 34 hours to promote gonadal development. when the water temperature reached 1015 ℃, check the maturity of wheat ear fish fry, there was little difference between male and female fish in general, but there were obvious differences in breeding season: mature male and female fish had large and dark body color, obvious parasexual characteristics appeared in snout, cheek and other places, that is, white horny "pearl star", rough feeling in hand touch. Male fish can squeeze out milky semen The female is small and light in color, often with a black longitudinal pattern on the side of the body, the oviposition tube is slightly protruding, the abdomen is dilated, there is an obvious outline of the ovary, the abdomen is soft, and the reproductive foramen is slightly red.

2. To induce labor

The spawning pond area of barley fish culture is 5060m2, the water depth is 0.60.8m, and the whole pond is sprinkled with 75100kg disinfectant per mu beforehand, and the ovulation stimulating hormone 2 is used to induce spawning, the dose is female fish 1.52ug/g, male fish 11.5ug/g, when it is found that male fish begin to chase female fish, artificial insemination can be performed.

3. Artificial insemination

It was found that the effect time of inducing spawning was 12 hours. After 12 hours of drug injection, the fish fry were caught, the eggs were collected by abdominal squeeze, the semen was collected by caesarean section, and inseminated by semi-dry method, then aerated water was added and gently stirred with feathers for 23 minutes and stood for 2530 seconds. The excess testicular tissue and other dirt were sucked out, and the fertilized eggs were put into the incubator to hatch in running water.

4. Hatching

The hatching pond of barley fish culture is a round cement pond with a radius of 33.5 m, which is disinfected by potassium permanganate in advance, the bottom of the pond is covered with a circle of nano-porous pipeline oxygen enrichment equipment, the water depth is 5060cm, and the water for hatching is ecological purification pool water filtered by 100150 mesh yarn silk; the eggs are moved into the running water to hatch, the temperature is 2025 ℃, the dissolved oxygen in the pond is not lower than 6mg/L, the water is changed for 1 minute per day, and disinfection is used regularly.

Matters needing attention in fish culture technology of wheat ear fish

1. Incubation technology

The hatching pond of barley fish culture is a round cement pond with a radius of 33.5 meters, which is disinfected by potassium permanganate in advance, and the bottom of the pond is covered with a circle of nano-porous pipe oxygen equipment, with a water depth of 50 to 60 centimeters, and the water used for hatching is ecological purification pool water filtered by 100-150 mesh yarn silk. The eggs were incubated in running water at a temperature of 20: 25 ℃, dissolved oxygen in the pool was not less than 6 mg / L, and water was changed to 1 / 2 every day. Disinfection drugs were used regularly.

2. Fish fry restocking

Before 7-10 days of stocking, the pond should be thoroughly cleaned and disinfected with quicklime, and then biological fertilizer should be applied to cultivate rotifers. The transparency of the pond water should be kept at 20-25 cm. Put 8 ~ 100000 summer flowers of wheat ear fish per mu and feed oil bran according to season, temperature and growth conditions, generally 1 ~ 3 times a day, after 3 ~ 5 months, it can reach the commodity specification of 120 ~ 160 fish per kilogram.

3. Feed feeding

Wheat ear fish is omnivorous fish, staple food zooplankton, can be fed with oil bran or self-made compound feed, feed formula is domestic fish meal 38%, rapeseed meal 21%, corn meal 12%, wheat meal 29%. Adhere to the principle of "four decisions and four looks". Normally, it is fed twice a day, and the feeding amount is about 5% of the body weight of the fish in the pond.

4. Points for attention

Due to a large amount of bait, the pool water is easy to become fertilised, so the water quality can be improved by reasonable water injection and fertilization. If necessary, continuous circulating micro-flow water should be adopted, generally changing water once every 5 days or so, and the amount of water change each time is 5 times of that of pool water. Microbiological agents are applied once every 10 to 15 days.

Selection of wheat ear fish species

Wheat ear fish is cultured in some areas as economic fish, and the selection of wheat ear fish can be based on foreign classification standards. Generally, the color of the body is darker, there are only 1-2 spots, and the older body can only be classified as Grade C (Grade III). With the middle of the body as the boundary, the arrangement of the rear spots does not exceed the middle, but the body surface is brighter, and those with some flashing stars on the scales can be classified as Grade B (Grade II). The arrangement of flower spots extends close to the head in the middle, and the lower body surface behind the Gill shows a red trend. the distribution of flashing stars on the body surface is widely distributed, and those with clear markings should be classified as Class A (first level); there are more peculiar features, such as text spots, strange patterns and colors, star features, gorgeous features, etc., all have the qualification to be listed as special class.

Distribution range of wheat ear fish

Barley fish is widely distributed and can be found in almost all freshwater waters. But specifically, there are more wheat ears in still waters and waters where the transparency of the water is not high, while there are few wheat ears in the waters where the current is faster and deeper. Ponds with more aquatic plants have more ears of wheat because they devour a variety of fish eggs attached to aquatic plants.

It is distributed in the freshwater areas of East Asia, Japan and Taiwan. it is an indigenous species in eastern China. Because it eats mosquito larvae and other characteristics, many countries introduce it to kill mosquitoes. However, due to the lack of natural enemies, it has the hidden danger of becoming alien invasive species. It has become an alien invasive species in the Yunnan-Guizhou Plateau and is one of the main culprits for the extinction of indigenous species in lakes such as Dianchi Lake.

Through the above content, I believe that everyone has a more in-depth understanding of the breeding technology and matters needing attention of wheat ear fish. As more and more people understand the benefits of wheat ear fish, the demand for wheat ear fish is also greatly increased, so breeding wheat ear fish is also a better breeding project.