Tilapia male and female pairing propagating method

A technology for tilapia and tilapia males, applied in fish farming, application, climate change adaptation and other directions, can solve the problems of inability to control inbreeding, inability to breed tilapia families, and the decline of offspring germplasm, so as to avoid offspring The effect of germplasm degradation

Inactive Publication Date: 2008-03-12
FRESHWATER FISHERIES RES CENT OF CHINESE ACAD OF FISHERY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such a group pairing breeding method cannot know the genetic relationship between the offspring and the parents. When genetic selection is carried out, only group selection (individual selection) can be carried out, and family selection of tilapia cannot be carried out.
However, long-term group selection cannot control inbreeding, which will cause germplasm decline in offspring

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The tilapia male-female mating breeding method of the present invention adopts the following process steps:

[0016] A cage with a volume of 1m×1m×1m is placed in an outdoor pond, and 20cm of the cage is left above the water surface, and the rest is immersed in the water. Select a sexually mature male fish (weight 250g), cut its upper jaw and disinfect it with iodine, and then place it in a cage; another sexually mature female fish is selected, and the gonad development is checked by observing the genital pores, and a well-developed fish is selected. Female fish (200g) are placed in a net cage where a male fish has been placed for pairing. Fertilized eggs can be seen in the mouth of the female fish in 8 days. Cultivation water temperature: 25°C.

Embodiment 2

[0018] The tilapia male-female mating breeding method of the present invention adopts the following process steps:

[0019] A net cage with a volume of 1m×1m×1m is placed in an indoor cement pool, 20cm of the net cage is above the water surface, and the rest is immersed in the water. Select 1 sexually mature male fish (body weight 500g), cut its upper jaw and disinfect it with iodine, and place it in a cage; select another sexually mature female fish, check the development of gonads by observing the genital pores, and select 1 well-developed fish Female fish (300g) are placed in a cage that has been placed with 1 male fish for pairing. Fertilized eggs can be seen in the mouth of the female fish within 7 days. Cultivation water temperature: 30°C.

Embodiment 3

[0021] The tilapia male-female mating breeding method of the present invention adopts the following process steps:

[0022] A net cage with a volume of 1m×1m×1m is placed in an indoor cement pool, 20cm of the net cage is above the water surface, and the rest is immersed in the water. Select a sexually mature male fish (weight 300 g), cut its upper jaw and disinfect it with iodine, and then place it in a cage; select another sexually mature female fish, check the gonad development by observing the genital pores, and select a well-developed fish Female fish (250g) were paired in cages where one male fish had been placed. Fertilized eggs can be seen in the mouth of the female fish within 10 days. Cultivation water temperature: 28°C.

[0023] From the first pairing on June 14, 2007 to the end of July 2007, a total of 105 pairs of fish were successfully paired and bred. There were about 100 groups with more than 40 fry, and most of the pairs produced more than 300 fry. Up to 200...

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Abstract

The present invention relates to a male and female mating propagation method of tilapia, in specific to a mating propagation of tilapia which can adopt the pattern of male mating female; the method belongs to the technical field of aquatic product breeding. The method is characterized in that a net cage is equipped in an outdoor pond or indoor concrete pond; adult male tilapias are selected and people cut the upper jaw of the tilapias and put the tilapias into the net cage after being sterilized; and then adult female tilapias are selected to put in the net cage for mating culture and people can see the zygotes in the mouths of female tilapias after 7 to 10 days. With the present invention, a tilapia family line can be established for the family breeding of tilapias. In addition, people can clearly know the relation between the offspring and parent to control the inbreeding and avoid the germ plasm degeneration of offspring.

Description

technical field [0001] The invention relates to a male-female mating breeding method of tilapia, in particular to a mating breeding method of tilapia, which can carry out male-female pairing, and belongs to the technical field of aquatic breeding. Background technique [0002] When the water temperature is stable above 18°C, select sexually mature male fish (more than 250g in weight) and female fish (more than 150g in weight), and put them into the pond according to the ratio of 1 male to 3 females or 1 male to 4 females. Put 1 to 2 tails per square meter for parental cultivation. When the water temperature rises above 22°C, the female and male fish with fully developed gonads will pair up and reproduce by themselves. [0003] Since the gonad development of tilapia is asynchronous, there are more female fish than male fish when stocking broodstock, which can avoid male fish fighting for females and reduce interference with female fish breeding. But such group pairing breed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 董在杰徐跑朱志祥
Owner FRESHWATER FISHERIES RES CENT OF CHINESE ACAD OF FISHERY SCI
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