1. Select high-quality fish fry: The choice of high-quality and healthy fry is the key to raising the survival rate of fish farming. To purchase fish fry with a certain scale of operation and high reputation, the species should be excellent, nurturing norms, and strict disinfection. 2. Fish fry timely pond: When the fry can swim, the yolk sac in the remaining one-third of the yolk should be under the pond. 3. Strict fry disinfection: fish fry before stocking, to cut off the way of infection, prevent fish disease. 4. "Three measurements" put fry: a measure of drug toxicity. The second test water body fat. Three measured water acidity. 5. Adjust the water body temperature difference: After long-distance transportation of the fish, the fish body can not afford the difference of water temperature above 3c after the long-distance transportation. When stocking, the oxygenated bag filled with fry is generally put into the pool water for a certain time to float, and the water temperature difference does not exceed 2c. Fish fry pond. 6. The implementation of satiety pond: fry before stocking, feed broiled hen yam 2 per 10,000, dilute egg yolk into egg yolk water, sprinkling and feeding seedlings, put the seedlings into the pool 20 minutes later. 7. The depth of the pool is suitable: The depth of the pool should be about 0.5m, to ensure adequate light and uniform water temperature. Double-layer mesh filtering is used when water is injected to prevent enemy pests from entering the pond with water. 8. Reasonable stocking density: The stocking density of herring and grass carp should be 10% to 20% less than that of herring. 9. The specifications are neat and consistent: stocking the same fry, once put enough, can not be added in batches. 10. Stocking methods Science: The fry stocking should be arranged in sunny and warm weather. At this time, the water temperature is high, and the dissolved oxygen is sufficient to help the fry quickly recover its physiological function. 11. Clean up pests in time: kill harmful insects in fish ponds and avoid affecting the survival of plankton in fish ponds.
romatographic and use double-antibodyromatographic and use double-antibodysandwich method to detect antigen. Whenthe concentration of antigen in specimen ishigher than the minimum detection limit, theviral antigen will form complexes withlabeled antibodies first. Under chromatogra-phy, the complexes move forward along thenitrocellulose membrane till captured bypre-coated monoclonal antibody ofindetection zone.Through the visible color tointerprete the test results.
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