Ayu culture requires clean water, no pollution, and low water temperature. Some aquaculture, such as mountain lakes, rivers, reservoirs, and foothill streams, where the water quality is lean and the basic productivity is low, can be cultivated. Artificial conditions, young fish (5 cm to 6 cm) after 5 months to 7 months of feeding, the general body weight up to 100 grams or more. In recent years, the market price of sweet fish has been high, and aquaculture has gradually developed. The breeding methods include the use of breeding grounds for cement pools, reservoir breeding, and stream aquaculture. The aquaculture cycle is short and the market price is high. The Japanese aroma fish consumption market is very large. As a kind of green and non-polluting food, ayu is gradually formed in the domestic consumer market, which is quite promising for breeding.
The artificial breeding techniques for sweetfish are described below based on the scale of production of 1000 to 1500 seedlings (5 cm to 6 cm in length) per cubic meter of water.
Major facilities 1. Nursery room should be east-west direction, glass fiber reinforced plastic tile roof nursery room, with black light to adjust the light intensity, control light intensity below 5000Lx. Nursery room windows should be wide and tall, which is conducive to ventilation and lighting.
2. The broodstock cultivating pond pool structure, round or rectangular, an area of ​​30 square meters to 50 square meters, pool depth of 1 meter to 1.5 meters, drainage hole in the middle of the pool, the water level controlled by the valve, need to cultivate the pool 2 to 3 .
3. Nursery pond The concrete pool structure is octagonal, round or rectangular, with an area of ​​25 to 45 square meters and a depth of 1 to 1.5 meters.
4. The bait culture pool The algae and rotifer culture ponds are rectangular or square, with an area of ​​10 to 30 square meters, a depth of 1 meter, and an area of ​​20% to 30% of the nursery ponds. The same reason is equipped with Artemia hatching tank or hatching tank, hatching tank is a square cement pool, an area of ​​5 square meters to 10 square meters, pool depth of 1.2 meters to 1.5 meters.
5. The water supply facility water supply system is seawater → sedimentation → filtration → disinfection → preheating → nursery ponds. Groundwater or tap water for fresh water. If you use tap water, you should pay attention to the content of bleaching powder in water. When it exceeds 4 g/m3, it will affect the survival rate of sub-fish.
6. Inflatable facilities The broodstock breeding ponds, nursery ponds, and artemia hatching ponds must have inflatable equipment. Two types of RGA 5.5 to 3000 Roots blowers are selected and used for gas supply through main and branch pipelines. No. 80 bulk gas stones are installed at the end of the branch pipes, and 1 aerated stone per 1 m 2 to 2 m 2 is placed in the nursery ponds. The hatchery is filled with 1 year of aerated rock every 0.5 cubic meters to 1 cubic meter. Small inflators can be used in the early and late nursery stages to save costs.
7. Heating and power supply facilities are heated by boilers. Generally, a 0.5-ton boiler is installed on a 1,000 m2 nursery water body. If electric heating is used, generally plastic single-phase heaters and electric heating rods are used for heating. Self-provided generator or diesel engine driven air supply equipment.
The artificial breeding techniques for sweetfish are described below based on the scale of production of 1000 to 1500 seedlings (5 cm to 6 cm in length) per cubic meter of water.
Major facilities 1. Nursery room should be east-west direction, glass fiber reinforced plastic tile roof nursery room, with black light to adjust the light intensity, control light intensity below 5000Lx. Nursery room windows should be wide and tall, which is conducive to ventilation and lighting.
2. The broodstock cultivating pond pool structure, round or rectangular, an area of ​​30 square meters to 50 square meters, pool depth of 1 meter to 1.5 meters, drainage hole in the middle of the pool, the water level controlled by the valve, need to cultivate the pool 2 to 3 .
3. Nursery pond The concrete pool structure is octagonal, round or rectangular, with an area of ​​25 to 45 square meters and a depth of 1 to 1.5 meters.
4. The bait culture pool The algae and rotifer culture ponds are rectangular or square, with an area of ​​10 to 30 square meters, a depth of 1 meter, and an area of ​​20% to 30% of the nursery ponds. The same reason is equipped with Artemia hatching tank or hatching tank, hatching tank is a square cement pool, an area of ​​5 square meters to 10 square meters, pool depth of 1.2 meters to 1.5 meters.
5. The water supply facility water supply system is seawater → sedimentation → filtration → disinfection → preheating → nursery ponds. Groundwater or tap water for fresh water. If you use tap water, you should pay attention to the content of bleaching powder in water. When it exceeds 4 g/m3, it will affect the survival rate of sub-fish.
6. Inflatable facilities The broodstock breeding ponds, nursery ponds, and artemia hatching ponds must have inflatable equipment. Two types of RGA 5.5 to 3000 Roots blowers are selected and used for gas supply through main and branch pipelines. No. 80 bulk gas stones are installed at the end of the branch pipes, and 1 aerated stone per 1 m 2 to 2 m 2 is placed in the nursery ponds. The hatchery is filled with 1 year of aerated rock every 0.5 cubic meters to 1 cubic meter. Small inflators can be used in the early and late nursery stages to save costs.
7. Heating and power supply facilities are heated by boilers. Generally, a 0.5-ton boiler is installed on a 1,000 m2 nursery water body. If electric heating is used, generally plastic single-phase heaters and electric heating rods are used for heating. Self-provided generator or diesel engine driven air supply equipment.
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