Method for artificially breeding, reproducing and releasing dace (leuciscus brandti)
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A technology of artificial breeding, multiplication and release, applied in the field of multiplication and release fish, artificial breeding, can solve the problems of low hatching rate and survival rate, and achieve the effect of increasing total output, survival rate and yield
Inactive Publication Date: 2014-11-19
王维坤
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[0010] The purpose of the present invention is to solve the technical problems of low hatching rate and survival rate, and to provide a method for artificial breeding, multiplication and release of beachhead crocodile
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specific Embodiment approach 1
[0024] Specific embodiment one: in the present embodiment, the artificial breeding of beachhead crocodile, the method for multiplying and releasing are carried out according to the following steps:
[0025] 1. Harvesting of broodstock: from mid-May to mid-June, 3-year-old females and males whose gonad development is V stage are collected, and then put into storage cages for breeding;
[0026] 2. Fish egg collection, fertilization, and debonding: Under the condition of temperature below 20°C, the extrusion method is used to collect mature eggs, and each egg collection basin collects 200,000 to 300,000 mature eggs from 10 to 15 female fish. Collect the semen of 9 to 12 male fishes into the egg collection basin, stir fully with a brush to wrap the semen evenly around the mature eggs, and after standing for 2 minutes, pour clean water into the egg collection basin, stir to activate the sperm, and complete fertilization. Then add tannic acid so that the concentration of tannic acid...
specific Embodiment approach 2
[0032]Specific embodiment two: what this embodiment is different from specific embodiment one is that in the step two in step two, each ovum picking basin collects 250,000 mature ovum grains of 12 female fishes, and collects 11 male fish semen in the ovum picking basin. Others are the same as in the first embodiment.
specific Embodiment approach 3
[0033] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that in step three, the water temperature is 15-20°C, the water depth is 30cm, the dissolved oxygen is 10.5mg / L, the transparency is 26cm, and the flow rate is 0.8 m / s incubation tank for 8 days, and then reduce the flow rate to 0.3m / s for 8 days. Others are the same as those in the first or second embodiment.
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Abstract
The invention discloses a method for artificially breeding, reproducing and releasing dace (leuciscus brandti), belongs to the field of artificial breeding, reproduction and releasing of fish and relates to a method for artificially breeding, reproducing and releasing fish. To solve the technical problem that the incubation rate and the survival rate are low, the method comprises the first step of catching the parent dace (leuciscus brandti), the second step of collecting, fertilizing and de-bonding eggs of the dace (leuciscus brandti), the third step of incubating fertilized eggs and rearing fry, and the fourth step of releasing the fry. By the adoption of the mode of aeration at the bottom of an incubation tank, dissolved oxygen during incubation of the fertilized eggs is increased; besides, due to the aeration, the viscosity of the fertilized eggs is lowered, and therefore the defects that in the prior art, the incubation rate and the survival rate are low can be effectively overcome. By adopting the method, the average daily incubation rate can reach over 80 percent, the birth rate of the fry can reach over 90 percent, and the survival rate can reach 95 percent.
Description
technical field [0001] The invention relates to a method for artificially breeding and multiplying released fish. Background technique [0002] The beachhead crocodile belongs to the bony fish, Cyprinidae, crocodile subfamily and genus crocodile. It is the only anadromous fish of the family Cyprinidae. It is distributed in the Japanese Sea System of the North Pacific Ocean. It is only distributed in my country. Suifenhe, Tumen River. The fry of this species are hatched in freshwater rivers, and then go downstream to grow and fatten in offshore waters. After the gonads mature, they go up the river and return to freshwater from April to June every year, and lay eggs on the rapids. The adult fish returns to the sea immediately after spawning, hence the name "beachhead fish". The beachhead crocodile is well-proportioned in shape, bright in color and delicious in taste, and has high economic value. During the spawning season every year, adult fish migrate upstream to form a "fi...
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