Device and method for fish reproduction, hatching and larval culture

A method for fish reproduction and hatching, the method being implemented using a device for fish reproduction and hatching, the device comprising an aeration device, a first netted division plate;

• a second netted division plate;
• a first water pump;
• a first net cage;
• a second water pump;
• and a second net cage;
• the method comprising:
• disposing the aeration device in a pond, the pond comprising a breeding area, a hatching area, and a nursery area;
• disposing the first netted division plate between the breeding area and the hatching area, and disposing the second netted division plate between the hatching area and the nursery area;
• disposing the first net cage in the hatching area and disposing the first water pump in the first net cage;
• disposing the second net cage in the nursery area and disposing the second water pump in the second net cage;
• aerating, by the aeration device, the pond to provide the breeding area, the hatching area, and the nursery area with dissolved oxygen;
• putting broodfish with developed gonads in the breeding area;
• pumping, by the first water pump, water from the hatching area to the breeding area, and the water in the breeding area flowing through the first netted division plate into the hatching area, thus forming a first water recirculating loop between the breeding area and the hatching area, where the water flow of the first water recirculating loop stimulates the broodfish to lay eggs, and the eggs comprises sticky eggs, floating eggs, and semi-buoyant eggs;
• placing a fish nest in the breeding area to collect the sticky eggs;
• aerating the breeding area to evenly distribute the floating eggs and the semi-buoyant eggs in the water, when the water flows from the breeding area to the hatching area via the first netted division plate, the floating eggs, the semi-buoyant eggs, and the hatched fry enter the hatching area through the first netted division plate along with the water flow of the first water recirculating loop;
• and removing the broodfish out of the breeding area;
• hatching the eggs in the hatching area to form larvae;
• culturing zooplankton in the nursery area 10-20 days before hatching;
• when the larvae start to swim, switching on the second water pump, and the water is pumped from the nursery area to the breeding area, the water in the breeding area flows through the first netted division plate into the hatching area, and flows from the hatching area through the second netted division plate into the nursery area, thus forming a second water recirculating loop among the breeding area, the hatching area, and the nursery area, and the larvae swim through the second netted division plate into the nursery area along with the water flow of the second water recirculating loop;
• and
• rearing the larvae in the nursery area.