A method of parental selection for improving reproductive efficiency of Nile tilapia

A Nile tilapia, reproduction efficiency technology, applied in fish farming, application, climate change adaptation, etc., can solve the problems of reducing production efficiency and benefits, cumbersome breeding process and operation, increasing labor load, etc.

Active Publication Date: 2021-10-12
FRESHWATER FISHERIES RES CENT OF CHINESE ACAD OF FISHERY SCI
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Problems solved by technology

During the breeding process of the improved strain of Nile tilapia, about one-third of the female parental individuals cannot reproduce and lay eggs, or the amount of eggs laid is only about 10% of that of normal individuals, which greatly reduces the reproductive efficiency
Since tilapia is a fish that breeds many times a year, the breeding process and operation are cumbersome and require fine detail. The existence of a large number of invalid female fish will undoubtedly increase the labor load, occupy a large amount of pond area and increase the use of invalid feed, increasing Reduced costs, reduced production efficiency and benefits

Method used

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  • A method of parental selection for improving reproductive efficiency of Nile tilapia
  • A method of parental selection for improving reproductive efficiency of Nile tilapia

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Embodiment 1

[0037] The selection of the female parent before the first breeding: starting from the fry, the fry comes from the national "Tilapia Genetics and Breeding Center" of the Freshwater Fishery Research Center of the Chinese Academy of Fishery Sciences, and chooses the Yixing Qiting Experimental Base of the Freshwater Fishery Research Center of the Chinese Academy of Fishery Sciences to breed by itself The 3,000 Nile tilapia seedlings were cultivated according to conventional methods. When the fry grow to about 10g, carry out electronic marking, and then after 4 months, the fry will reach the adult stage. Starting from the implantation of the electronic tag, the parents were morphologically measured every 20 days, including morphological data such as , , and so on (see Table 1). The analysis found that the coefficient of variation of the abdominal body width of the female fish varied greatly during the six measurements. 12%, 13%, 15%, 20%, 45%, 50% in turn. The variation coefficie...

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Abstract

The invention provides a parent selection method for improving the reproductive efficiency of Nile tilapia, and relates to the technical field of aquaculture. The invention screens the Nile tilapia parents with high reproduction efficiency by screening the morphological measurements from seedlings to adult fishes, as well as the stages of primary reproduction, second reproduction and third reproduction. The parental breeding method of the present invention can significantly improve the reproductive efficiency of female Nile tilapia, and the improvement speed is fast. In the breeding selection process, the parents are not dissected, and all selected excellent individuals can be retained. to count.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, and in particular relates to a parent selection method for improving the reproductive efficiency of Nile tilapia. Background technique [0002] Nile tilapia is the main species cultivated in China and even in the world. In the genetic breeding of tilapia, growth traits have always been improved as the main economic traits of tilapia. At present, the growth traits of Nile tilapia have been significantly improved. Although the growth rate has increased, in the actual reproduction process, the reproduction rate has decreased significantly. In the breeding process of the improved strain of Nile tilapia, about one-third of the female parental individuals cannot reproduce and lay eggs, or the amount of eggs laid is only about 10% of that of normal individuals, which greatly reduces the reproductive efficiency. Since tilapia is a fish that breeds many times a year, the breeding process and operatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K61/10
CPCA01K61/10Y02A40/81
Inventor 强俊何杰徐跑朱昊俊陶易凡包景文
Owner FRESHWATER FISHERIES RES CENT OF CHINESE ACAD OF FISHERY SCI
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