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Rapid and efficient method for breeding tilapias

A tilapia, high-efficiency technology, applied in fish farming, application, climate change adaptation and other directions, can solve the problems of long breeding cycle, inbreeding decline, inability to carry out long-term breeding, etc., to achieve efficient breeding, avoid Inbreeding decline, the effect of long-term selection

Inactive Publication Date: 2011-08-10
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

[0003] However, the breeding cycle of this method is long, and generally requires more than 5 to 6 generations.
Moreover, the fish bred in this way are very likely to be closely related. Therefore, after several generations of breeding, the problem of inbreeding depression will occur, and long-term breeding cannot be carried out.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment one: a kind of rapid and efficient tilapia breeding method adopts the following breeding steps:

[0018] (1) Establishment of family lines: In July 2006, 60 families of Gifu strain Nile tilapia introduced from Malaysia World Fisheries Center were used as the basis for breeding populations;

[0019] (2) The fry from 60 families were hatched, and the fry from different families were isolated in different cages for cultivation. They were first fed with paste feed for 20 days, 6 times a day, and the amount of feeding was 6% of the weight of the fry. %, then fed with pellet feed, fed 4 times a day, and the amount of feeding was 5% of the fry's body weight;

[0020] (3) When the fry grow to 7-15g, select 30 fry in each family and use a syringe to inject radio frequency tags into the abdominal cavity of the fry for individual marking, so as to identify each fry;

[0021] (4) Temporarily raise the marked fry in an indoor cement pond, feed them with pellet feed, and ...

Embodiment 2

[0028] Embodiment two: a kind of fast and efficient tilapia breeding method adopts the following breeding steps:

[0029] (1) Establishment of the family line: In May 2007, the second-generation family line was used as the selected family line;

[0030] (2) Pair breeding is carried out in a net cage. First, a male fish is paired with a female fish. After the female fish spawns, the female fish is removed, and the fertilized eggs are taken out from the female fish mouth and passed through 0.8% salt water. After rinsing, transfer to the incubator for running water incubation, put another female fish into the net cage to pair with the male fish, and finally produce 106 families;

[0031] (3) When the fish fry are isolated and bred to 7-15g, each family randomly selects 30 fish for individual marking with PIT, and measures the weight, body length, body height and body thickness of each fish;

[0032] (4) Put the marked fish into a 5-acre earthen pond for cultivation until April 2...

Embodiment 3

[0035] Embodiment three: a kind of rapid and efficient tilapia breeding method adopts the following breeding steps:

[0036] (1) Establishment of the family line: in May 2008, the third-generation family line was selected as the breeding line;

[0037] (2) Pair breeding is carried out in a net cage. First, a male fish is paired with a female fish. After the female fish spawns, the female fish is removed, and the fertilized eggs are taken out from the female fish mouth and passed through 0.7% salt water. After rinsing, transfer to the incubator for running water incubation, put another female fish into the net cage to pair with the male fish, put the other female fish into the net cage, and finally produce 101 families;

[0038] (3) When the fish fry are isolated and bred to 7-15g, each family randomly selects 30 fish for individual marking with PIT, and measures the weight, body length, body height and body thickness of each fish;

[0039] (4) Put the marked fish into a 5-acr...

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Abstract

The invention relates to a rapid and efficient method for breeding tilapias, which is characterized by comprising the following steps of: utilizing GIFT strain Nile tilapias of 60 families introduced from the Malaysia Worldfish Center as a basic breeding colony; separating tilapia fries of different families into different net cages for breeding; respectively selecting 30 fries from each family, and injecting a radio frequency identification to a fry abdominal cavity with an injector to identify individuals; breeding the fries before a propagation season of the next year, and measuring body weight, body length, body height and body thickness data of all identified tilapias; estimating a breeding value of each fringetail according to a BLUP (Best Linear Unbiased Prediction) method by utilizing ASREML software; selecting male tilapias with the estimated breeding values of the top 60 and female tilapias with the estimated breeding values of the top 120, and carrying out nest mating propagation in the ratio of 1:2 of the male tilapia to the female tilapia to establish a family of the second generation; taking out oosperms from the oral cavity of the female tilapia which spawns, and transferring the oosperms into a hatcher to carry out hatching of running water. The rapid and efficient method for breeding the tilapias can avoid the problem of inbreeding depression caused by inbreeding, thereby being capable of carrying out breeding for a long period of time.

Description

technical field [0001] The invention relates to a fast and efficient tilapia breeding method, which belongs to the field of aquatic breeding. Background technique [0002] Breeding of tilapia is usually done through group breeding, that is, female and male broodstock are placed in ponds at a ratio of 3 to 4:1, and the stocking density is 1 to 2 females per square meter. . After the broodstock spawn, collect the hatched small fish for breeding, and then select a certain number of fish as the next-generation parent according to the breeding index, and reproduce to produce the next generation. In this way, after 5-6 generations of selective breeding, a population with excellent traits can be obtained. [0003] However, the breeding cycle of this method is long, generally requiring more than 5 to 6 generations. Moreover, the fish bred in this way are very likely to be closely related. Therefore, after several generations of breeding, the problem of inbreeding depression will ...

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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