Breeding method of all-male hybrid snakehead

A breeding method and technology for hybrid snakeheads, which are applied in biochemical equipment and methods, microbial measurement/inspection, climate change adaptation, etc., can solve problems such as increasing breeding costs, reducing overall prices, and increasing feed coefficients, reaching a huge industry. Value and scientific value, strong low temperature resistance, the effect of reducing the feed coefficient

Active Publication Date: 2019-10-22
PEARL RIVER FISHERY RES INST CHINESE ACAD OF FISHERY SCI +1
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  • Abstract
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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...

Method used

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  • Breeding method of all-male hybrid snakehead

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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 breeding method of all-male hybrid snakehead. The method includes the following steps of bred channa maculata sex reversal, identification of pseudo-female fishes, reproduction of the pseudo-female fishes, identification of super-male fishes and expanding propagation of the super-male fishes. By using the method, the all-male hybrid snakehead can be bred, and the male rate is 93% or above; after being bred for 7 months, the all-male varieties are increased by 8% or above in yield compared with normal varieties, andthe all-male varieties with the height of 2 jin or more are increased by 15%; the coefficient of a novel fish feed in the current year of breeding is reduced by 0.1; after being bred for 7 months, theall-male varieties are increased by 26.6% in yield compared with normal varieties, and the feed coefficient is reduced by 0.175-0.21. The new varieties 'hybrid snakehead' obtained through hybridization have the advantages of being high in growth speed and strong in low temperature resistance, can replace snakehead breeding in the north area and become national breeding varieties.

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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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
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