First, the quality of choice:
The choice of seed quality is very critical. In recent years, fish disease has become a rising trend. A large part of the reason is that the quality of seedlings is unqualified. For example, unqualified seedlings will have high incidence and mortality. , Slow growth, low yield and other consequences.
The choice of seed quality can be considered from three aspects:
1, ask. If the seed is imported from outside, it is necessary to ask about the origin of the seed, the history of the disease, the history of the drug, the amount of death, the amount of feed, and the brand of feed, and eliminate the close relatives, drug residues, and hormone vaccines.
2. Sensory judgement: neat specifications, plump and uniform, robust physique, clean surface, bright color, no scars, lively swimming, strong back-water power.
3, microscopic examination: Microscopic examination of fish and cercaria parasites, whether the complete silk, with or without congestion, whitening phenomenon. Anatomy of the body cavity to observe whether the congestion, liver and gallbladder is normal, with or without discoloration, swelling, inflammation of the intestine is red, if any of the above phenomenon, the seedlings need to be carefully selected!
Second, seedlings step:
1, test seedlings 2, disinfection of fish 3, anti-stress treatment 4, release seedlings
1. Test seedlings: test the water in the pond with live fish and put it into the cage. Only after pond toxicity can the fish be released.
2, fish disinfection: 5% of salt water disinfection 10-15 minutes
3. Anti-stress treatment: Before breeding, the aquaculture water bodies shall be detoxified and anti-stressed by using speed solution treasure and vitality treasure water dilution sprinkling. Ensure that the seedlings grow smoothly in the new breeding environment.
4, Fangmiao: pay attention to changes in water temperature, to minimize the temperature difference.
Third, note:
1. Time for planting seedlings: Choose sunny morning time.
2, Fangmiao: Upwind, large ponds, can be divided into 2-3 positions Fangmiao.
3, seedling temperature: temperature difference is less than 3 °C
4. Fish species specifications: The fish ponds that have been caught in rounds of fishing are required to be stocked. The fish ponds that are not caught in rounds of fishing are required to have the same specifications for fish, which is conducive to growth.
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