The duckbill fish has a wide range of temperatures. It is not afraid of low temperatures, but can also tolerate high temperatures. In winter, even if the surface of the water is frozen, as long as there is still sufficient dissolved oxygen in the water, you can live in the water under the ice. Here is the method of keeping duckbill fish that I carefully organized for you, take a look.

Methods of rearing duckbill

Breeding site selection

Breeding site selection in the city before the Puddle Steep Reservoir. The aquaculture area has a large water area, the water depth is more than 6m, the dissolved oxygen is 6~9mg/L, the pH value is 7~8.4, the total hardness is 20~40mg/L, the ammonia nitrogen is 0.02~0.06mg/L, and the nitrite is 0.0015~0.01mg/L. The water quality is good, and it meets all the standards of GB1160 "Fishery Water Quality Standards" and NY5051-2001 "Pollution-free Food Freshwater It meets all the requirements of GB1160 "Fishery Water Quality Standard" and NY5051-2001 "Harmless Food Freshwater Aquaculture Water Quality" standard.

Net box structure and setup

The net box is set up with reference to the silver carp net box, and the plankton rich waters are selected, which require smooth water flow, shelter from wind and sunshine, and quiet environment. The net box frame is made of simple bamboo frame, and the material of the box is made of polyethylene knotless mesh. The net box specifications for 5m?5m?2.5m, mesh size 2.5cm. spoon-nosed sturgeon afraid of light, the net box surface with black film cover.

Seedling selection and stocking

Select robust, swimming lively, neat specifications, no disease or injury of high quality seedlings. The stocking density is 20~40 tails per square meter. Specification is 10~15cm, according to the spoon-nosed sturgeon seedlings are more sensitive to the characteristics of the water temperature change, the temperature difference should not be too large when the seedlings into the box, not more than ?2 ℃ is appropriate, try to regulate the same. Before entering the box, use 1.5% to 2.0% saline for 8 to 10 minutes to sterilize the fish.

Scientific baiting

Initial stocking to feed zooplankton (such as red worms) as the main, and then gradually domesticated to switch to floating granular bait, and supplemented with night light baiting. The bait is required to be fresh, not spoiled, nutritious, and palatable in size. Baiting follow? Four fixed? principle. When the water temperature is 20~30℃, the daily baiting rate is 1.5%~3%; when the water temperature is below 20℃, the daily baiting rate is 0.5%~1.0%. Specifically according to the feeding situation, weather, water quality and other timely high speed. The baiting frequency is 3 times a day, respectively 07:00~08:00, 11:00~12:00, 18:00~19:00.

Timely split box

Spoonbill sturgeon growth rate is very fast, should be timely sub-specification cultivation, to avoid polarization, is conducive to improving the survival rate.

Diligent patrol

1. Strictly implement the morning, noon and night patrol system carefully observe the sturgeon's feeding and activities, and fish out the residual bait in a timely manner. Regularly rinse the net box to prevent mesh blockage, affecting the exchange of water inside and outside the box.

2. Ensure the safety of the net box Rainy days and stormy season, pay attention to reinforce the net box at any time. Also often check the net box has no damage, found damage timely repair. The net box is also installed on the upper mouth of the black shade nylon cloth and anti-theft net.

3. Do a good job of daily record Daily record of air temperature, water temperature, baiting and the number of deaths. When abnormalities are detected, timely measures are taken.

Fish disease control

Adhere to? The main focus is on prevention and health management. The principle of prevention is the most important thing. Fry stocking and each time the box is divided with 1% to 2% salt or 0.4mg/L dibromo hydantoin and other drugs bath into the box, and every 20 days or so in the net box with 15mg/L quicklime and 0.3mg/L dibromo hydantoin splashing disinfection. The use of prohibited drugs is strictly prohibited in the waters around the net box.

Feeding Points of Feeding Duckbill Fish

1: The duckbill fish has a wide range of temperatures. Neither afraid of low temperatures, but also tolerate high temperatures. In winter, even if the surface of the water is frozen, as long as there is still sufficient dissolved oxygen in the water, it can live in the water under the ice; in summer, the surface water temperature of the pond often exceeds 35?C, it can still grow normally!

2: Fast growth. The duckbill is one of the fastest growing freshwater fish. The year hatched out of the fry rearing to the end of the year, each tail (exclusively) can reach 1.5 city pounds. Set of up to 2 pounds or more!

3: feed province. It is mainly eat zooplankton, set up in the feed do not have to feed alone. The feed ratio will not be more than 1.3:1 if it is specialized.

4: Easy to catch. Its habits are similar to those of chub, and it is not good at jumping. The catch rate of the first net is more than 90%!

5: Less condition. Mainly parasites. There are not many diseases appearing nowadays!

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