Spring is the season when fish and fingerlings are released, and off-farm transportation of fry and fingerlings has become an important part of shallow water aquaculture production. Transportation should be safe and efficient, and the survival rate of transportation should be guaranteed and improved.
First, the fish should be selected to select the fish back, tail flesh thickness, the body is strong, bright color, scales, fins intact, no injuries on the surface and parasites, swimming in the cage active, strong anti-water, intensive in the box One of the fish heads, head down, tail up to grab the water.
Second, the seed transport
Plastic bag oxygenation transport plastic fry bag specifications 70 cm 40 cm. The water temperature is between 20°C and 25°C. Each bag can be shipped with 80,000 to 100,000 fry, 5000 to 7,000 tails, 1200 to 1,500 tails, or 600 to 5 cm to 7 centimeters long. ~800 tails, 300 to 500 tails from 7 cm to 8 cm, and the survival rate can be as high as 90% within 24 hours.
When the water temperature of the canvas canopy is about 20°C, generally 200,000 to 300,000 fish fry, 10,000 mussels and 14,000 to 18,000 fleshy flowers can be loaded per fry (0.4 m3 to 0.5 m3). Or, 0.3 to 0.4 thousand fish species of 8 cm to 10 cm in length are loaded. With oxygenation conditions, the density can be increased to 40% to 50%.
Canvas liners lined with plastic bags to transport oxygen in the sail lining a large plastic bag, the bag height is more than twice as high. Fill the water to one-half the height of the loquat, then load the fish, squeeze out the air inside the loquat, recharge the oxygen, and tie the bag to transport. The density of fish is 2.5 times that of open transportation.
Third, pay attention to the transport of seed
Prepare a well-planned transportation plan before transportation; prepare tools and drugs for loading and unloading, shipping, disinfection, and disinfection of the pond; prepare oxygenation equipment. The transportation density shall be determined according to the type, specification, water temperature, water quality, transportation time, transportation method and oxygen supply equipment of the fish. The weight ratio of general fish species to water body is preferably 1:4 to 1:5. Choose a sunny day to transport the fish species. 2 days to 3 days before departure, the food should be stopped. It is necessary to pull the net to concentrate the fish 2 times to 3 times. 2 hours to 3 hours before the shipment of the fish species, the net should be raised in the holding box for raising. Strictly use sieves to sieve the fish species, remove the wild fish, and ensure that the specifications are consistent. During the transportation, you should always observe the dynamics of the fish and adjust the amount of oxygenated. The water is changed every 5 hours to 8 hours, and the old water is drained to about one third before the new water is injected. Once oxygen species are found to be oxygenated, they should be oxygenated in time. After the arrival of the fish species, "people and other fish" and "water and other fish" are required. The fish should be soaked and disinfected before the fish pond.
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