Rapid breeding method for small yellow croakers

A small yellow croaker, fast technology, applied in fish farming, application, climate change adaptation, etc., can solve the problems of increasing labor force, affecting egg quality, short window period, etc., to reduce the cost of breeding, reduce the number of breeding, and shorten the breeding period Effect

Pending Publication Date: 2022-07-12
ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The accuracy of this breeding method is low, and it takes a long time to obtain new varieties with excellent traits
Simultaneously, there are certain disadvantages in the method of artificially induced labor and egg-squeezing insemination provided in this invention, such as the inevitable damage to brood fish in the artificial egg-squeezing and semen collection process, especially the small yellow croaker, which is highly stressful, and artificial operation will bring fatal injury
At the same time, the window period for spawning of small yellow cr

Method used

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  • Rapid breeding method for small yellow croakers
  • Rapid breeding method for small yellow croakers
  • Rapid breeding method for small yellow croakers

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] Example 1

[0028] A rapid breeding method for small yellow croaker

[0029] (1) Select female fish with a bulge and soft abdomen and male fish with a small amount of semen outflow from the 1-year-old breeding base group as excellent parents, and artificially induce labor;

[0030] (2) Artificial induction of labor: 0.5mL / 100g of oxytocin is used for female fish, the dose of male fish is halved, and the number of induced labor is 1.2 times that of female fish. Specifically, there are 15 female fish and 18 male fish. , mixed culture in a bucket with a volume of 300L;

[0031] (3) According to the time of oxytocin effect, 1h before spawning of broodstock (at water temperature of 16°C, 50h after artificial induction), select female fish with round and bulging reproductive holes and about to lay eggs and place them in an opaque plastic bucket with a diameter of 80cm. Add clean seawater with a salinity of 25 to the bucket, control the water depth in the bucket at 25cm, a s...

Example Embodiment

[0032] Example 2

[0033] A rapid breeding method for small yellow croaker

[0034] (1) Select female fish with a bulge and soft abdomen and male fish with a small amount of semen outflow from the 1-year-old breeding base group as excellent parents, and artificially induce labor;

[0035] (2) Artificial induction of labor: 0.6mL / 100g of oxytocin was used for female fish, the dosage of male fish was halved, and the number of induced labor of male fish was 1.5 times that of female fish. Specifically, there were 16 female fish and 24 male fish. Mixed culture in a bucket with a volume of 300L;

[0036] (3) According to the time of oxytocin effect, 0.5h before spawning of broodstock (when the water temperature is 18.5°C, 39h after artificial induction), select female fish with round and bulging genital holes and are about to lay eggs and place them in an opaque plastic bucket with a diameter of 80cm. , add clean seawater with a salinity of 28 in the bucket, control the water dept...

Example Embodiment

[0037] Example 3

[0038] The difference between this embodiment and Embodiment 1 is that in the artificial induction of labor in this embodiment, the number of males induced to produce is 1.4 times that of females, specifically 15 females and 21 males. The rest of the steps are the same as in Example 1.

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Abstract

The invention discloses a rapid breeding method for small yellow croakers. The breeding method comprises the following steps: (1) selecting one-age individual female fish and male fish as parents; (2) carrying out artificial spawning induction on the selected parents by using an oxytocic; (3) 0.5-1 h before spawning of the parent fish, independently pairing the male fish with a large amount of seminal fluid flowing out through artificial gentle extrusion with the female fish with rounded and bulged reproductive holes, collecting fertilized eggs for incubation and cultivation, and constructing different families; the female fish does not need manual egg squeezing; and (4) performing genetic evaluation on different families by using body quality data at the age of 8 months, and breeding parents according to a genetic evaluation result. According to the method, parents are one-age individuals, the breeding age limit is shortened, the number of obtained high-quality fertilized eggs is large, and male and female parent fishes are almost not damaged and can be reused after short-time intensive cultivation. According to the method, the accuracy of genetic evaluation is highest when breeding is limited to be 8 months old, meanwhile, the breeding quantity can be reduced, and the breeding cost can be effectively reduced.

Description

technical field [0001] The invention relates to the field of aquaculture, in particular to a rapid breeding method for small yellow croaker. Background technique [0002] The small yellow croaker (Larimichthys polyactis) has very important economic value. Due to the long-term fishing pressure and changes in the marine environment, the resource structure of the wild population of the small yellow croaker has been severely damaged in recent years, manifesting as individual miniaturization and early sexual maturity. Germplasm decline. The artificial breeding of small yellow croaker was successful in 2015, and then it broke through the large-scale breeding of fry and realized large-scale cage culture, which laid a solid foundation for the industrial development of small yellow croaker. [0003] However, at present, there is a serious shortage of improved varieties with large differences in growth among individuals and excellent growth traits in the breeding process of small yell...

Claims

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Application Information

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IPC IPC(8): A01K61/10
CPCA01K61/10Y02A40/81
Inventor 刘峰楼宝詹炜谢庆平郭丹丹
Owner ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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