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A kind of breeding method of all-male black-spotted hybrid snakehead

A breeding method and hybrid snakehead technology, applied in biochemical equipment and methods, microbe measurement/inspection, fish farming, etc., can solve the problems of increasing the cost of breeding, reducing the overall price, increasing the feed coefficient, etc., and achieving a huge industry Value and scientific value, strong low temperature resistance, and the effect of reducing feed coefficient

Active Publication Date: 2021-01-26
PEARL RIVER FISHERY RES INST CHINESE ACAD OF FISHERY SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] (1) In the prior art, the new variety obtained by continuous breeding of 4 generations of spotted snakeheads and 2 generations of black snakeheads as the parents of fine-bred lines only solves the problems of cold resistance and growth speed, but does not solve the problem of the sex of snakeheads The problem of large differences, in which the female individual is small, and after sexual maturity, the egg will increase the feed coefficient and increase the cost of breeding
[0009] (2) Channa commercial fish are priced according to specifications, and the market price of individuals over 1kg is more than 50% higher than that of individuals under 1kg, and the proportion of small females increases, which reduces the overall price and seriously affects the income of fishermen
This consumes a lot of labor and increases expenditure
[0011] (4) The existing technology uses the method of gynogenesis to produce and multiply YY super male snakehead. The identification of pseudo female fish needs to use the sex of the offspring to infer the genotype of the parents, and the survival rate of the offspring of gynogenesis is very low, and the efficiency of parent preparation is very low. very low
The main technical obstacles lie in the molecular identification of pseudo female fish and super male fish, and the inability of pseudo female fish or super male fish to reproduce, etc.

Method used

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  • A kind of breeding method of all-male black-spotted hybrid snakehead
  • A kind of breeding method of all-male black-spotted hybrid snakehead
  • A kind of breeding method of all-male black-spotted hybrid snakehead

Examples

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Effect test

example 2

[0096] A farm in Doumen, Zhuhai simultaneously breeds all-male black-spotted hybrid snakeheads and common hybrid snakeheads. The two adjacent ponds each have an area of ​​6 mu. They were released on May 22, 2018. The length of the ponds is 8 cm (about 5.5 grams), and the size is normal There were 65,000 hybrid snakehead species. On June 12, 69,000 all-male hybrid snakeheads of the same specification were released into the pond. The breeding density of the all-male group was slightly higher than that of the normal group. About gram, the breeding management and feeding feed are the same, and the comparative measurement will be carried out every month starting from July 12.

[0097] The comparative measurement results are as follows:

[0098] initial specification 30 days 62 days 90 days 120 days All male group 5.0 59.3 179.7 338.5 775.2 control group 15.0 96.7 207.5 316.8 580.1

[0099] The initial size of the all-male hybrid snakehea...

example 3

[0101] In December 2018, two 5-acre ponds in Zhuhai City where all males and common hybrid snakeheads were raised produced fish. Among them, the seedlings for breeding all males were produced on May 25th, and the ponds were released on December 5th, and the ordinary seedlings were produced in May. Produced on the 21st, out of the pond on December 28th. The all-male group was bred for 194 days, yielding 69,023 jin of fish. The normal group was bred for 221 days and produced 63,826 jin of fish. After sampling measurement, the average weight of the all-male group was 1.8 catties, 69% above 2 catties, and the feed coefficient was 1.02. The average weight of the ordinary group was 1.6 catties, 54% above 2 catties, and the feed coefficient was 1.12. When the breeding time of the all-male group was 27 days less, the average size was larger and the feed coefficient decreased by 0.1.

[0102] On March 1, 2019, an all-male hybrid snakehead breeding pond in the Zhongshan Triangle came...

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Abstract

The invention belongs to the technical field of fish breeding, and discloses a method for cultivating an all-male black-spotted hybrid snakehead, performing sex reversal of the selected breeding line, identification of pseudo-female fish, reproduction of pseudo-female fish, identification of super-male fish and super-male fish Multiply. Utilize the method step provided by the present invention, can cultivate all-male black-spotted hybrid snakehead, the male rate is more than 93%; All-male varieties are cultivated in the process of breeding for 7 months, and compared with common varieties, the yield per mu increases by more than 8%, and the yield is more than 2 jin. 15% higher; the feed coefficient of new fish in the year of breeding is reduced by 0.1; after 10 months of breeding, the yield is 26.6% higher than that of ordinary species, and the feed coefficient is reduced by 0.175‑0.21. The new variety "black-spot hybrid snakehead" obtained by the hybridization of the present invention has the advantages of fast growth and strong low temperature resistance, and can replace the culture of black snakehead in the northern region and become a national breeding variety.

Description

technical field [0001] The invention belongs to the technical field of fish breeding, and in particular relates to a method for cultivating all-male black spotted hybrid snakehead. Background technique [0002] Currently, the closest prior art: [0003] Channa is an important freshwater high-quality economic fish in my country. It has the characteristics of less bone spurs, fresh and tender meat, and rich nutrition. [0004] At present, the main breeding species in the south of the Yangtze River and South China is the hybrid snakehead, which is obtained by crossing the snakehead as the female parent and the snakehead as the male parent. The snakehead is mainly cultivated in the Yellow River and the north. Because snakeheads can only eat chilled fish or live bait, the water quality is seriously polluted, and breeding has been restricted or prohibited in many areas. The hybrid snakehead is not cold-resistant and cannot be extended to northern regions. [0005] The unit uses...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12Q1/6879C12Q1/686A01K61/10
CPCA01K61/10C12Q1/686C12Q1/6879C12Q2600/124C12Q2600/156C12Q2600/172C12Q2527/107C12Q2563/107Y02A40/81
Inventor 赵建陈昆慈罗青刘海洋欧密陈柏湘尹建雄江谢武
Owner PEARL RIVER FISHERY RES INST CHINESE ACAD OF FISHERY SCI