Staged population selective breeding method of Takifugu obscurus non-toxic pedigree

Abstract

The invention relates to a staged population selective breeding method of a Takifugu obscurus non-toxic pedigree, which is used for selecting unrelated artificial freshwater aquaculture parent fishes according to the population selecting standard and the individual selecting standard. The selective breading stage comprises a preoviposition period, an artificial reproduction period, a larva period, a postlarva period, a fishseed period, a commercial fish period and a prematuration period. The method comprises the following steps of: selecting in the continuous culturing period of three to four years according to the selecting standard of each stage to selectively breed individuals not containing tetrodotoxin; stabilizing the non-toxicity character generation by generation through at least two continuous selective breeding periods to eliminate the possibility of hereditarily carrying the tetrodotoxin, and then selectively breeding non-toxic populations with rapid growth and strong stress resistance; and judging whether the whole fishes and highly toxic organs comprising livers and ovaries of commercial fishes in various specifications are toxic or not, and selecting and preserving the non-toxic populations. The method has the advantages of simple and easy execution and rapid effect taking and is suitable for selectively breeding the populations in any scales of fish fry fields.

Description

technical field

[0001] The invention relates to a method for breeding fine varieties of fugu obscura, in particular to a method for selecting and breeding puffer obscura in a non-toxic family lineage stage population. Background technique

[0002] At present, the source of seedlings for puffer fish breeding in my country is mainly to use puffer fish caught in the sea and some artificially mature puffer fish for seedling breeding, or to raise seedlings from fertilized eggs of puffer fish imported from abroad. Due to years of extensive farming and the lack of enough wild populations of puffer obscurus for seedlings, the species of puffer obscurus has been degraded very seriously. The breeding characteristics of puffer obscurus are: precocious maturity, poor stress resistance, reduced growth rate, commercial specifications The large size difference and other traits are seriously degraded. Therefore, through some biological means, the optimal genetic characteristics of the popula...

Examples

Embodiment Construction

[0017] Specific implementation examples

[0018] (1) Optimizing in the early stage of spawning means that before spawning, 20% of the fully artificially cultured parent fish populations from different sources are identified as non-toxic, and then raised in different pre-spawning ponds, with 100-200 pairs of broodstock in each pond as One breeding group, at least two different breeding groups, and more than two different breeding groups can also be set up, and there is no restriction on the source area of ​​the breeding group; the selection criteria for the group also includes the traceability within two and / or three generations of the group No kinship, different production areas, and different breeding generations; the standard for individual selection is: from each group, select broodstock with strong vitality, normal body biological characteristics, clear markings, and a weight greater than 15% to 20% of the average body weight, as a reserve. The selected broodstock are cult...

technical field

[0001] The invention relates to a method for breeding fine varieties of fugu obscura, in particular to a method for selecting and breeding puffer obscura in a non-toxic family lineage stage population. Background technique

[0002] At present, the source of seedlings for puffer fish breeding in my country is mainly to use puffer fish caught in the sea and some artificially mature puffer fish for seedling breeding, or to raise seedlings from fertilized eggs of puffer fish imported from abroad. Due to years of extensive farming and the lack of enough wild populations of puffer obscurus for seedlings, the species of puffer obscurus has been degraded very seriously. The breeding characteristics of puffer obscurus are: precocious maturity, poor stress resistance, reduced growth rate, commercial specifications The large size difference and other traits are seriously degraded. Therefore, through some biological means, the optimal genetic characteristics of the popula...

Examples

Embodiment Construction

[0017] Specific implementation examples

[0018] (1) Optimizing in the early stage of spawning means that before spawning, 20% of the fully artificially cultured parent fish populations from different sources are identified as non-toxic, and then raised in different pre-spawning ponds, with 100-200 pairs of broodstock in each pond as One breeding group, at least two different breeding groups, and more than two different breeding groups can also be set up, and there is no restriction on the source area of ​​the breeding group; the selection criteria for the group also includes the traceability within two and / or three generations of the group No kinship, different production areas, and different breeding generations; the standard for individual selection is: from each group, select broodstock with strong vitality, normal body biological characteristics, clear markings, and a weight greater than 15% to 20% of the average body weight, as a reserve. The selected broodstock are cult...