Imitation ecological efficient propagation method of Andrias davidianus

Abstract

The invention discloses an imitation ecological efficient propagation method of Andrias davidianus, comprising: first, building a farm at a river section having the growth history of wild Andrias davidianus or propagation history of imitation ecological Andrias davidianus, wherein the farm has an artificial river and multiple propagating ponds serially set on the same, and each end of each propagating pond is provided with a salamander nest; putting a pair of parental salamanders in each propagating pond, with the female and male using the two nests respectively and isolated by a partition mesh; keeping the propagating ponds clean and sanitary, not icing in winter, with water temperature kept to 23 DEG C and below in summer; in early August, intramuscularly injecting LRH-a to one parentalsalamander having poor sexual gland development and maturation degrees according to its body so as to promote the development of sexual glands; in mid to late August, intramuscularly injecting LRH-a again to each parental salamander having improved but not complete development and maturation degrees of sexual glands according to the body weight so as to carry out artificial spawning induction; providing good management for laying propagation and management from egg phase to fry phase. By using the method of the invention, propagation rate of Andrias davidianus can be increased to 1:300 and above, and propagation participation rate can be increased to 70% and above.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, and relates to a giant salamander breeding method, in particular to a giant salamander imitation ecological breeding method. Background technique [0002] Chinese giant salamander (Andrias davidianus), commonly known as giant salamander, is the largest amphibian in existence. It is called a living fossil. It is a rare and endangered species in my country. CITES) Appendix I. In recent years, with the successful research and development of giant salamander artificial reproduction technology and another breakthrough in giant salamander imitation ecological reproduction technology, the reproductive rate of giant salamander has been greatly improved, and giant salamander seedlings have been supplied in large quantities, which in turn has boosted the rapid development of giant salamander industry. [0003] However, in the technical practice of artificial breeding of giant salamanders, there have al...

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Problems solved by technology

[0003] However, in the technical practice of artificial breeding of giant salamanders, there have always been problems such as poor gonad maturity and low reproduction rate of giant salamanders, that is, the ratio of breeding salamanders in that year to that of the whole field is low, and the ratio of breeding salamanders in the whole field to that of the current year is low. The ratio of seedlings is only 1:10~15

Although the reproduction rate of the imitation ecological breeding technology of giant salamander has been greatly improved, it can reach 1:40-115, but the reproduction rate is still very low, only 10%-15%. The pools are all mixed cultures, it is difficult to distinguish between reproductive salamanders and non-reproductive species, and it is difficult to weed out non-reproductive species, and in the breeding season, species of salamanders compete for mates and bite each other, which will cause a large number of species of salamanders damage

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