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A technology for Yadong salmon and female fish, which is applied in the field of large-scale cultivation of Yadong salmon fry, can solve the problems of low fertilization rate and hatching rate, and achieve the effects of convenient use, improved work efficiency, and increased hatching rate
Active Publication Date: 2022-06-03
西藏自治区农牧科学院水产科学研究所
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[0003]
CN202110363281.7 discloses a method for large-scale breeding of Yadong salmon in the Lhasa area. The steps include broodstock selection, artificial insemination, artificial hatching and fry opening. Through strict control of artificial fertilization and hatching links, although the Yadong salmon has been achieved Large-scale reproduction, but low fertilization and hatchability
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Embodiment 1
[0025] According to 3 females and 3 males, the male fish collected semen 1 hour in advance, the collected dose was 5ml / tail, put it in a foam box with ice cubes, the temperature was kept at 4 ℃, the semi-dry method was used, and 6.5% normal saline was used to dilute it. .
[0026] D, larvae opening
[0027] Transfer the whole into the cement pool: Quickly lift the hatching frame into the temporary water body, and then use the cart to pull it to the parallel tank and pour it. If you use a copy net, it is easy to hurt the fish, and the skin of the small fish is very fragile.
Embodiment 2
Embodiment 3
This embodiment is on the basis of Embodiment 1:
The incubation water temperature of the vertical incubator is 9-10° C., the dissolved oxygen is 6.5 mg / L, and the water flow rate is 0.2-3 L / s.
[0030] In the D step, 10,000 seedlings are placed in each parallel tank, the water flow is 0.5-0.6L / s, the dissolved oxygen is controlled above 6.2mg / L, the cement pond is indoors with a sun shed, and the breeding density is 1000 / s. m 3 , the water temperature is 11-13 ℃, and the water flow is controlled at 4-5L / s.
[0031] For cultivation in the cement pond, the feeding feed is self-made pellet feed, 3 times a day, and the residual bait dirt on the bottom of the pond is cleaned once every 3 days, and the growth rate is relatively fast.
[0032] The protein content of the self-made pellet feed was 44%, and the crude fat was 19%. The self-made pellet feed is broken material, and the mass percentage content of each component is as follows: fish meal 48%, corn gluten meal 4%, poultry b...
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Abstract
The invention provides a method for large-scale cultivation of salmon salmon fries, which comprises the following steps: screening mature female and male salmon salmon, anesthetizing with MS-222 2 days before squeezing eggs, then adopting a one-time injection method, performing artificial insemination, taking underground water as an incubation water source, automatically flowing to a vertical incubator from high to low after aeration oxygenation and ultraviolet sterilization, placing 9000-10000 fertilized eggs in each incubation tray, and putting the fertilized eggs into the vertical incubator. After hatching is conducted for 20-22 days, all the fertilized eggs have eye spots, the fertilized eggs are transferred into a parallel groove hatching frame to be hatched, and all the fertilized eggs come out of membranes after hatching is conducted for 41 days; when the yolk sacs disappear and the body color of the larva fishes becomes deep, starting to feed microparticle feed, transferring the larva fishes into parallel grooves to be cultivated after 15 days, putting ten thousand larva fishes into each parallel groove, and transferring the larva fishes into a cement pond from the parallel grooves to be cultivated after 15 days of cultivation. And the large-scale breeding production of the salmon salmons from breeding to fry rearing is realized.
Description
technical field [0001] The invention belongs to the technical field of fish culture, in particular to a method for large-scale cultivation of Yadong salmon fry. Background technique [0002] Salmonidae is one of the top 3 farmed fish in the world, and its aquaculture production is second only to common carp and tilapia. The breeding areas in my country are mainly distributed in Heilongjiang, Jilin, Liaoning and Gansu. Salmon trutta, also known as river salmon and catfish, belongs to Salmonoides, Salmonidae, Salmon genus, and is synonymous with brown trout. It is native to northern Africa, Europe and West Asia. Introduced to Yadong County in the mid-19th century, it has a history of 150 years. Yadong salmon has established a relatively stable population in the Yadong River in Tibet, and can grow and breed naturally. It has become an endemic species and belongs to cold water fish. Because of its tender meat, no intermuscular spines, rich nutrition and delicious taste And de...
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