In recent years, as the scale of eel farming continues to expand, the demand for seedlings has also increased year by year. Many farms are far away from the seedling production area. Fish fry need to be transported by long distances to reach the breeding pond mouth. Therefore, the survival of carp carp is improved. The rate is particularly important.
The pre-transport preparation of fry immediately after transport from the natural sea area has a low survival rate and must therefore be raised. Whether it is to raise a cement pond or raise it in a cage, water quality must be ensured. When using a concrete pool for raising, the amount of water changed every day must reach more than 200%, and the holding density is 400 to 500 per cubic meter of water. The cages should be raised in cages, and the cages should be set in small tide sea areas or shrimp ponds with a large area and a water depth of 2.5 meters or more. The holding density is 500 to 600 tails per cubic meter of water. During the holding period, live Artemia or fresh fish carcasses are fed and disinfected once a day with 2 g/m3 of potassium permanganate solution. The holding time is generally 3 to 7 days, and the longest period should not exceed 10 days.
One day before the shipment, the seedlings were stopped feeding, allowing the fish to empty the intestine, preventing the fry from being injured due to strenuous exercise during packing and transportation, and the fry being contaminated with water due to defecation or vomiting during transportation. The water for transportation must be suitable for salinity and no pollution. The seawater, while ready to control the temperature of ice water.
The fish seedlings with a length of 3 cm or less are transported with oxygen in a fry bag. The body length of 3-6 cm can be filled with oxygen in a fry bag or transported in a canvas bucket. If the body length exceeds 6 cm, it must be transported with a barrel of oxygen.
The fry bag is transported with a volume of 10 liters of fry bags, plus 2 to 3 litres of seawater, and put into the fry, discharge the upper air and then fill with pure oxygen. Put the bag into the incubator, two bags per case, two bags of Between the ice, sealed shipping. The law is suitable for air transport and automobile transportation, and the survival rate of transportation is above 95%.
The canvas bucket transports 1 cubic meter of canvas bucket, puts the same size plastic film bag, adds 500~600 liters of clean seawater, puts fry, puts oxygen-enriched stone in the plastic film bag, and tightly seals the bag mouth. Hang up, add appropriate amount of ice to cool, and then continue to oxygenate the transport. This method is suitable for automobile transportation, and the transportation survival rate is above 95%.
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