Crayfish culture technology

1.1 Collection of live shrimp No matter how the shrimp is caught, it should not be dehydrated. The commodity shrimp to be transported long distances and the small-size shrimp used for breeding are separated and kept in living water storage silos or framed cages. At present, box cages are commonly used in production to raise live shrimp. This kind of cage can be attached to both sides or rear ends of the shrimp boat. After the fishing boat arrives at the bank, the shrimp will be ready for transport and the larva will be sent to the nearest pond for breeding.

1.2 The large-size commodity shrimps that have been caught for transport are temporarily unable to be shipped for various reasons and must be raised in a cage. A group of nylon cages with a length of 2.5m, a width of 1.5m, and a height of 1m are generally prepared in advance. The cages are placed in a body of water with rich dissolved oxygen and fresh water, and the amount of each cage is not more than 25kg. During the period of feeding, animal feed such as minced snails, moths, cockroaches, and the like may be properly fed. Large-scale shrimp feeding time should not be too long, the longer the time, the higher the mortality rate. Because when the water temperature is above 15°C, some of the freshwater prawn are likely to molt during feeding, and because the density of the shrimp in the cage is too large and there is no hidden place, it is easy to die or be eaten by other shrimps during the molting process. Drop it.
In addition, the high density of nutrition will cause the limbs of the shrimps to be cut off and lose their physical strength, which may result in a large number of deaths in transit. Therefore, the long-distance transported shrimps generally cannot be maintained for a long time, and they are shipped 1-2 days later, and the survival rate is high. highest.
1.3 Sorting Green shrimp must be sorted and packed in accordance with the specifications before they are shipped. Sorting penaeid shrimps should be carried out in oval plastic basins or tubs. Several holes are drilled in the pelvic floor. The basins are neither filled nor stagnant. After the shrimp is put into the water, the water flows away. When sorting green shrimp, avoid strong light or strong wind, and prevent the water in the earthworms from quickly escaping in strong light or strong wind and cause death. Sorting should be completed in the shortest possible time.
2.1 Matching and Installation of Live Shrimp Vehicles (Carrier Capacity 800kg)
2.1.1 The tank is 1.5m high, 1.6m long and 1.2m wide. Inside the box, Yuansteel with a diameter of 10mm is welded into two frames in a horizontal direction, and the box is divided into three compartments. Each cage can vertically stack 13 cages.
The tank was welded with a 3mm steel plate. The upper, middle, and lower parts of the tank are reinforced with a 3cmx3cm angle welded frame. Each side is also reinforced with two 3cmx3cm angle steels. The outside of the box is coated with antirust paint. Wooden structure tanks can also be made from fir boards. In the high temperature season, a layer of heat-insulating plastic foam shall be wrapped on the box, then covered with a layer of aluminum skin, and the upper part shall be equipped with a water tank cover. The ball valve 2 with a diameter of 6 cm shall be welded to the lower part of the side of the water tank as a drain valve. A hole of 3.5 cm in diameter is left in the lower part of the other side of the tank for passing through the intake duct.
Use four galvanized pipes with a diameter of 3.5 cm and a length of 70 cm, two lengths of 160 cm, two elbows, and four tees for the outside air supply pipe. Four galvanized pipes with a length of 60 cm are used as the ventilation pipe inside the box. Fourteen galvanized tubes with a diameter of 2.5 cm and a length of 120 cm were used to form a gas tube in the box. A hole with a diameter of 5 mm was drilled about 10 cm apart.
Connect a plastic hose with a diameter of 10mm to the upper part of the air supply pipe, and insert it into a transparent bottle filled with clean water in the cab of the car to monitor whether the air supply system is operating normally.
2.1.2 Two diesel engines, one with 12 horsepower for the supply of gas, the other with 3 horsepower for the purpose of adding water to the water on the way.
2.1.3 Oxygenation equipment There are only one oxygen aeration pump and two oxygen cylinders. Once the diesel engine fails, oxygen cylinders are used for direct oxygen supply.
2.1.4 One freezer, capable of storing ice 0.5t. When the temperature exceeds 15°C, the ice can be cooled to increase the survival rate of the shrimp.
2.1.5 80 shrimp cages, each 12 cm high, 15 cm wide and 50 cm long. First use a diameter of 8mm yuan steel welded into the frame according to the above specifications, outsourcing polyethylene mesh, the upper set a convenient opening of the small door, and has a buckle, Sheng shrimp shrimp cage will not allow access.
2.2 Green Prawn Transport
2.2.1 Fill the water tank and fill the water tank with the matching water pump in the nearest lake or pond. Its water quality should be clear and pollution-free. In the hot season, deep well water needs to be loaded.
2.2.2 The carrier truck is to be opened to the side of a shrimp culture pond or a holding pond, and the net caged shrimps are to be taken out. Each net cage contains 5 to 10 kg of shrimp, which is less prosperous in the high temperature season and more abundant in winter. After the shrimp is well served, the small door is closed and the water tank is placed.
2.2.3 Before the tank is placed in the cage, the diesel engine must be started to inflate. After confirming that the oxygen-increasing equipment is operating normally, the shrimp can be loaded into the tank. After the live shrimp is loaded, the oxygen-increasing equipment must be continuously operated until it reaches the market, and all live shrimp can be shut down after it is sold.
2.2.4 During transportation, the driver and car escort personnel shall pay attention to monitoring the airborne condition in the water bottle hung in the cab. Once a stoppage of air bubbles is detected, the supply system must be faulty or the diesel engine must be shut down.
2.2.5 Manual temperature control temperature is the key to the survival rate of long-distance transportation of shrimp. If the temperature exceeds 15°C, ice should be added to the tank to reduce the temperature, that is to say, ice cubes broken into 5~10kg ice cubes will be directly put into the water tank, so that the ice cubes are evenly distributed in the water tank, and the water temperature in the water tank is optimally controlled. 1°C.


Ginger Herbal Medicine,Ginger Food,Ginger Root,Ginger Powder

Yirun Agricultural Cooperative ,

Posted on