Winter and spring is the season when fish and fingerlings are placed. 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 fleshy, the body is robust, 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. Generally, the fish is about 13 cm in length. There are 48 grass carp per kilogram, 44 white fins, 42 flower buds, and 40 carp.
Second, the seed transport
1. 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 carry 80,000 to 100,000 fry, 5000 to 7,000 tails, 1200 to 1,500 summer flowers, or 600 species of fish, 5 to 7 centimeters long. ~800 tails, 300 to 500 fishes of 7 cm to 8 cm, and the survival rate can be as high as 90% within 24 hours.
2. When the water temperature of canvas canopy open is about 20°C, generally 200,000 to 300,000 fry can be loaded per quabe (0.4 to 0.5 cubic meters), 10,000 for Wuzao and 14,000 for summer flower. Millions of tails; or 0.30 to 0.4 thousand fish species that are 8 cm to 10 cm long. If there is oxygenation conditions, the density can be increased to 40% to 50%.
3. Oxygen-inflated canvas bags lined with plastic bags lined in a large plastic bag, the bag 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.
III. Precautions for the transport of seedlings Prepare a thorough transportation plan before transportation; Prepare tools and drugs for loading and unloading, shipping, disinfection, and disinfecting ponds; 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 to 3 days before departure, the food should be stopped. It is necessary to pull the net to concentrate the fish 2 or 3 times. 2 hours to 3 hours before the shipment of the fingerlings, 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. Change the water every 5 hours to 8 hours. The old water is discharged to about one-third of the new water. Once oxygen species are found to be oxygenated, they should be oxygenated in time. After the arrival of the fish species, fish, fish, and other fish are required. The fish should be soaked and disinfected before the fish pond.
Clinical Analytical Instruments
Urine Ketone Test,Clinical Analytical Instruments,Urinalysis Test Strips,Rapid Strips
Changchun Medicon Technology Development Co., Ltd , http://www.jlmdk.com