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Method for breeding full-feminization rainbow trout

A breeding method and technology for rainbow trout, applied in climate change adaptation, fish farming, application, etc., can solve the problems of low universality, time-consuming and laborious, low efficiency of gender control, etc., and achieve good adaptability and simple and easy operation method line effect

Inactive Publication Date: 2012-11-21
北京卧佛山庄养殖有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The methods of fish sex control mentioned above have the following limitations: interspecies hybridization: it can only be used in specific fishes, and the universality is not high; hormone treatment or gynogenesis: it is difficult to obtain 100% single-sex fry, sex The control efficiency is low; gynogenesis combined with hormone treatment technology: the operation steps are the most cumbersome, time-consuming and labor-intensive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for cultivating fully female rainbow trout; the method is to take the eggs and sperm of rainbow trout, carry out the first round of fertilization treatment, and obtain the first round of fertilized eggs; then hatch the first round of fertilized eggs to obtain the first round of fertilized eggs. The upper floating seedlings of the round were raised for the first round to obtain adult fish. In the first round of raising, the mixed feed containing conventional fish feed and letrozole was fed earlier, and then the conventional fish feed was fed; The genetic type in the adult fish described above is that the sperm of the false male fish whose genotype is female and the phenotype is male and the ovum of rainbow trout carry out the second round of fertilization treatment, the second round of hatching treatment, and the second round of rearing to obtain the second round of Adult fish is the above-mentioned whole female rainbow trout.

[0022] The method sequentially in...

Embodiment 2

[0054] This embodiment is a preferred solution based on Embodiment 1. In this example, some parameters in the hybridization and culture methods were further optimized.

[0055] The operation method and precautions of this embodiment are the same as those of Embodiment 1, the difference is:

[0056] In step B, the first round of incubation treatment is carried out in micro-flow water with a water temperature of 12°C under indoor shading conditions, with a DO value of 10 mg / L and a pH value of 8.5;

[0057] In the C step, the weight ratio of the letrozole to the conventional fish feed is 15:1000;

[0058] Continue to feed the above-mentioned mixed feed for the first round of floating seedlings for 6 months, and then change to feeding conventional fish feed for 1.5-2 years until the gonads of the first round of floating seedlings mature into adult fish ; The first round of feeding is carried out in micro-flow water with a water temperature of 12°C, a DO value of 10 mg / L, and a ...

Embodiment 3

[0063] This embodiment is a preferred solution based on Embodiment 1. In this example, some parameters in the hybridization and culture methods were further optimized.

[0064] The operation method and precautions of this embodiment are the same as those of Embodiment 1, the difference is:

[0065] In step B, the first round of incubation treatment is carried out in micro-flow water with a water temperature of 8°C under indoor shading conditions, with a DO value of 8 mg / L and a pH value of 7.0;

[0066] In the C step, the weight ratio of the letrozole to the conventional fish feed is 20:1000;

[0067] Continue to feed the above-mentioned mixed feed for the first round of floating seedlings for 4 months, and then switch to feeding conventional fish feed for 1.5-2 years until the gonads of the first round of floating seedlings mature into adult fish ; The first round of feeding is carried out in micro-flow water with a water temperature of 8°C, the DO value is 8 mg / L, and the ...

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Abstract

The invention aims at providing a method for breeding full-feminization rainbow trout. The method comprises the steps of first feeding a mixed feed containing a feed for common fishes and letrozole and then feeding the feed for common fishes in the breeding of first upward floating fries obtained in first fertilized ovum incubation; taking sperms of false milter with female genotype and male phenotype from adult fish to perform second fertilization together with ovum of the rainbow trout, and finally obtaining second adult fish, namely the full-feminization rainbow trout. The mixed feed containing the letrozole is used in the first feeding process, thereby facilitating control of gender of larval fish. Parameters of the method are reasonably set in two-time incubation and feeding steps, and various factors produce synergistic effect, thereby facilitating the incubation of the fertilized ovum to obtain upward floating fries and enabling the upward floating fries to grow to be adult fish. Various operation methods in the method are simple, convenient and easy to perform, and the method is good in adaptability and suitable for being popularized and used in vast numbers of farmers.

Description

technical field [0001] The invention belongs to the field of artificial reproduction of fish, and in particular relates to a method for cultivating all-female rainbow trout. In the method, during the first round of fertilized eggs hatching to obtain the first round of floating seedlings, the first round of floating seedlings is first fed with conventional fish. The mixed feed of feed and letrozole, and then fed with conventional fish feed; then the second round of fertilization treatment was carried out with the sperm of pseudo male fish whose genotype was female and phenotype was male in the adult fish and the eggs of rainbow trout, Obtain the adult fish of second round finally, be described all female rainbow trout. Background technique [0002] Currently, in many cultured fish species, there are significant differences between male and female fish in aspects such as growth rate, age of maturity, reproductive ability, body color, and individual size. Therefore, artificial...

Claims

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Application Information

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IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 邱黎明白宝海杨莉刘东田莉莉
Owner 北京卧佛山庄养殖有限公司
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