There are three methods of artificial insemination of fish: dry method, semi-dry method and wet method. Dry artificial insemination is to first put the female and male fish on the fish stretcher, drain the water, and wipe the remaining water on the fish body and the stretcher with a towel. First squeeze the eggs into a clean water basin ("four major carps") or a large bowl (carp, crucian carp, roundhead bream, etc.), then squeeze in a few drops of semen and stir evenly by hand. For the eggs of the "four major carps", add clean water to the basin immediately, stir for 2 to 3 minutes to fertilize the eggs, and finally rinse several times or pour directly into the incubator for incubation; for carp, crucian carp, roundhead bream eggs, use yellow mud to de-stick and incubate, or sprinkle into fish nests for incubation. The difference between semi-dry insemination and dry insemination is that the male fish semen is squeezed into or sucked out from the anus with a straw and added to a beaker or vial containing an appropriate amount of 0.85% saline for dilution, then poured into a basin containing fish eggs and stirred evenly, and finally clean water is added and stirred for 2 to 3 minutes to fertilize the eggs. Wet insemination is to squeeze the fish eggs and semen into a basin filled with clean water at the same time, stirring while squeezing to fertilize the fish eggs. This method is not suitable for sticky eggs, especially those with strong stickiness. In production, dry and semi-dry artificial insemination are mostly used. |
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