Hybrid gurnard fry breeding technology

Abstract

The invention relates to a hybrid gurnard fry breeding technology and discloses a hybrid gurnard fry breeding technology. Gurnard fry breeding mainly adopts a mixed breeding mode. The mixed breeding mode adopts Megalobrama amblycephale as a female parent and Megalobrama hoffmanni as a male parent for hybridization and obtains a new breed. The hybrid gurnards keep good properties of the two parents and are docile in temperament. The hybrid gurnards are a demersal fishes, like an environment of slow water flow. The juvenile hybrid gurnards like schooling and are easy to catch. The crisped hybrid gurnards are herbivorous fishes and the juvenile hybrid gurnards mainly eat aquatic plants and phytodetritus, and like artificial diet in an artificial breeding condition. The crisped hybrid gurnards has advantages of good disease resistance, high survival rate, low food coefficient and stable inheritable character. In the current year, the fish length can reach 12 to 18 cm. In the second year, the fish length can reach 30 cm and the weight can reach 0.6 to 1.2 kg. Later, the growth rate slows. Generally, after 1 year breeding, the weight can reach 0.5 kg per fish which is the standard for sale. The fish gonad grows mature in 3 years.

Description

technical field [0001] The invention relates to the technical field of hybrid bream seedling breeding, in particular to a hybrid bream seedling breeding technology. Background technique [0002] China is a big aquaculture country in the world, with aquaculture production accounting for 70% of the world. In terms of breeding, my country has successfully carried out research on the theory and technology of cross-breeding of freshwater fish, such as grass carp and bighead carp, triangular bream and herring, and grass carp and triangular bream The cross-fertilization cytology studies of the subfamilies have proved that the fish hybridization between subfamilies has a normal fertilization process, and found out that the scale coat and body color inheritance of the loose-scaled mirror carp and Xingguo red carp, the purse red carp and the Xiangjiang wild carp are respectively affected by 2 Pair and 1 gene control, the difference in gonad development and karyotype of the offspring of ...

AI Technical Summary

Problems solved by technology

However, at present, the germplasm of the existing cultured species is degraded, the intensive ecological breeding technology is backward, the market price of the cultured species continues to slump, and the cost of breeding has doubled. Many problems cannot be effectively solved, which seriously restricts the development of the freshwater fish farming industry.