How to raise fish fry in adult fish ponds? Technical points of fish fry culture in adult fish ponds

How to raise fish fry in adult fish ponds? Raising seedlings of summer flowers in adult fish ponds can not only improve the utilization rate of water environment, but also provide large-scale and high-quality seedlings for adult fish culture next time, but there are many points for attention in adult fish ponds.

1. Adult fish species (fry) should leave room for the next step of rearing fry.

If it is necessary to use adult fish ponds to cultivate summer flower fish fry (fry), when releasing adult fish fry (fry) in the early stage, it should be noted that the future fish carrying capacity can not reach the limit, and it is necessary to leave room for overstocking fish fry (fry), otherwise it will affect the growth of fish fry, and the excessive fish load in the pond is also very dangerous.

Second, cultivate summer flower fish fry and strive for uniform specifications.

In order to make the fish fry (fry) in adult fish ponds meet the demand specifications, they can be released appropriately in advance, and the specifications of summer flower fry are neat and uniform. In this way, the growth period of fish fry is long, the size is large, and the size and physique are consistent and robust.

Third, accurately grasp the amount of fish fry in captivity.

The size of fish fry coming out of the pond has a certain relationship with stocking time, fry quality, feeding management, but has more to do with stocking density. Under the condition that the stocking time and fry size are determined, the size of the fry depends on the stocking density. Therefore, the reasonable stocking density should be determined according to the technical conditions and management level. General mu mixed cultivation inch seedlings (more than 3 cm) depending on the variety 300-500.

IV. Strengthen feeding and management

Individual fish in the pond are large and small, so attention should be paid to the feeding and management of adult fish and fry. Adhere to the principles of timing, positioning, qualitative and quantitative feeding, flexibly grasp the amount of bait according to the specific situation, watch water fertilization to cultivate fish fry palatable natural bait, and pay attention to pond patrol, water quality management, disease prevention and so on.

Pay attention to the collocation of varieties

Summer flower fish fry (fry) are raised in adult fish ponds, and fry with the same or similar feeding habits are released in different ponds as far as possible. The proportion of silver carp and bighead carp fry is 4-5:1, and crucian carp fry should be kept or less in carp ponds. The species structure and quantity of fish fry can not be mechanically applied in accordance with the structure and quantity of adult fish culture.

VI. Adult fish are caught and released from the pond in time.

When the fish fry are cultured in the adult fish pond, the fish carrying capacity of the pond will gradually increase with the passage of time, and the sudden change of weather in the high temperature season is often prone to flooding pond accidents. Since August, adult fish have reached commercial specifications, so adult fish should be caught on the market in time, which can not only alleviate the contradiction of large fish carrying capacity in ponds to avoid accidents, but also win time and space for fry growth to improve the quality of fish fry (fry).

It is not difficult to raise fish fry in adult fish ponds, as long as we do a good job of management, we can greatly reduce the cost of culture, save money, and bring more profit space to aquaculture.