CATDOLL : CATDOLL: What kind of fish fry will be near the waves?

1. What kind of fish fry will be near the waves?

Yellow croaker, yellow croaker, white croaker fry, etc.

1. Yellow croaker is called yellow croaker because its scales are yellow. Yellow croaker is one of the four major seafoods.

2. Yellow croaker is a kind of fish commonly caught in rivers and brought in from the sea.

3. White croaker has no barbels and its belly is silvery white. You can find yellow croaker, yellow croaker, white croaker and other fry near the waves.

2. What should we pay attention to when releasing fish fry into the river?

Be careful in hail weather, rainy days, rising water levels, and stones underfoot. The shore is slippery. When releasing the fry, don't drop any debris from your hands into the river. It's best to have two people remove it together, with one person taking the lead and releasing the other.

Pool water purity and temperature

3. What is the method for breeding high-yield fish fry?

High-yield fish fry breeding method

The fertilized eggs of fish, after being placed in an artificial flowing water environment and under the right conditions of temperature, dissolved oxygen, and water quality, develop into larvae that can swim horizontally, which we usually call "splashes". One of the keys to ensuring the survival rate of "splashes" is to grasp the right time for "splashes" to enter the pond, that is, to comprehensively consider multiple factors such as transportation and temperature to ensure that when the "splashes" enter the pond, they have a certain swimming ability and a sufficient supply of nutrients in their bodies.

The adaptability of “Shuihua” to the breeding environment

"Splash" is very young and sensitive to external stimuli. About 10 days before releasing "splash", the fish fry pond should be cleaned as much as possible. The method is to make the water level in the pond 60 cm and use quicklime to clean the pond. The purpose is to kill all small fish in the pond. The reference amount of quicklime is 100-150KG per mu. The reference amount of quicklime used for dry pond disinfection is 60-100KG per mu. After adding a large amount of quicklime, the toxicity of quicklime will disappear in about 8 days. In order to safely release the seedlings, it is advisable to release water-clearing fish before releasing the seedlings. After about 10 days, a certain number of zooplankton will be generated in the water surface. Although the number of zooplankton is relatively small, the water body is closer to the spawning water similar to the life of "splash".

The growth of "splash"

After the "splash" is put into the pond, the zooplankton in the water surface is relatively small, which requires the breeder to provide the "splash" with appropriate food in time. Therefore, it is very important to feed the "splash" with some cooked egg yolks or to add raw soybean milk in time before putting the "splash" into the pond. Generally, 200,000 to 300,000 seedlings are put into 1 mu, and 3-7 jin of wet soybeans are fed twice a day. The soybean milk will be absorbed into the water and act as liquid fertilizer. The "splash" fish pond is generally 1-3 mu, with a standard rectangular shape, a flat bottom, and about 10 cm of silt.

The water level when "Shui Hua" is put into the pond should be controlled at 60-80 cm. If the temperature is normal and the feeding is effective, after 20-30 days, "Shui Hua" can grow to about 3 cm (inch piece) in length, and the meat is close to the summer flower fish stage of adult fish. At this time, the river surface can no longer meet its growth needs, and the pond should be divided in time, otherwise it will affect growth and survival. Preparation work should be done before pond division: Generally, the fry are trained by pulling the net before pond division, the purpose is to improve the fry's ability to adapt to the pulling net, so as to avoid the damage of the fry caused by muddy water, frightened activity of the fry, etc.

Ensuring sufficient dissolved oxygen in pool water

Strengthen pond inspections and collect various information on fry activities in a timely manner. The method of oxygenation is to properly fill the pond with fresh, highly oxygenated cold water that has been strictly filtered (the purpose is to prevent the infiltration of wild fish, etc.). Generally, 8-10 cm of water is recommended every 5-7 days.

Management should be scientific

The cooked egg yolk water and raw soy milk should be sprayed evenly. It is not suitable for the water to be too thick or too thin, which is not good for the reproduction of delicious bait microorganisms (rotifers and water fleas). If the watering time is too long or too much, the fry will consume a lot of energy in the shallow pond for a long time. These are factors that are likely to lead to unsatisfactory fry breeding results and should be avoided during production.

The general breeding method is to use fertilizers, add some natural fish baits in it, or add some organic fertilizers in it, and then use artificial feed when it is old and weak in the later stage, and put it into the fish pond in spring, and finally there will be a high yield.

The method for high-yield breeding of fish fry is to select excellent fish fry varieties, cultivate them in ponds, and then move them to larger ponds after they grow up.

You need to pay attention to the density of the fish pond, pay attention to the eating habits, ensure balanced nutrition, ensure the cleanliness of the fish pond, and ensure the quality of the water.

You need to choose high-quality varieties, ensure sufficient temperature, maintain sufficient humidity, change water in time, and add some feed in time.