Method for fertilizing and hatching fishes capable of laying adhesive eggs
A technology for sticky eggs and fish, applied in the field of aquaculture, can solve the problems of high probability of contamination, low fertilization hatching rate, decreased hatching rate, etc., to achieve the effect of avoiding uniform distribution, ensuring sufficient fertilization, and prolonging fertilization time.
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Embodiment 1
[0040] Fertilization and hatching method of catfish eggs
[0041] Mix the fertilized eggs frozen in the preservation solution at a quantitative ratio of 3:1, then quickly add the prepared NaCl solution with a mass concentration of 5‰, stir evenly for 1 min, and spread the fertilized eggs on the pre-prepared clean water On a 25-mesh polyethylene mesh, clean water at 23°C, arrange the fertilized eggs evenly within 3 minutes, slowly take them out of the water, expose to the air for 5 seconds, then slowly immerse in water for 5 seconds, repeat 3 times, the fertilized eggs are firmly attached to the mesh, and put The mesh is transferred to the hatching tank, and the air is introduced to make the dissolved oxygen amount to 8mg / L. Keep the hatching tank continuously inflated and change the water, and the hatching can be hatched under normal hatching conditions. The above fertilization and incubation method was repeated to set 3 repetitions. Statistical fertilization rate and hatchin...
Embodiment 2
[0044] Fertilization and hatching methods of crucian carp, bream and yellow catfish
[0045] Mix the sperm and eggs of crucian carp or bream frozen in the preservation solution at a ratio of 3:1, and the sperm and eggs of yellow catfish at a ratio of 5:1, and then quickly add them in advance The prepared NaCl solution with a mass concentration of 5‰, after uniform stirring for 1min, spread the fertilized eggs on a 40-mesh polyethylene mesh, place the mesh in a NaCl solution with a mass concentration of 3‰, and clean water at 23°C, spread the fertilized eggs evenly When finished, slowly take out the NaCl solution and transfer it to clean water. At this time, the fertilized eggs will quickly produce stickiness and attach to the mesh, and then transfer the mesh to the hatching tank. The hatching method is the same as that of the largemouth catfish.
[0046] According to statistics, the fertilization rate of crucian carp, bream and yellow catfish is 82.5%±4.6; the hatching rate is...
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