Induced spawning method of Brachymystax lenok

Abstract

An artificial inducement method for spawning of brachymystax lenok, relates to an artificial inducement method for spawning of fish, which solves the problems of unfocused spawning time, long spawning period and low hatching rate, comprising the steps of: 1. respectively delivering the parent fish into an induced spawning pond in spring; 2. performing induced spawning on the parent fish when water temperature reaches 7-12 DEG C; 3. injecting oxytocic in the pectoral fin basis free of squamae after the male and the female fish are hocused, adopting the secondary injection, then mixing the parent fish, after seven days, discharging seminal fluid by the male fish and ovulating by the female fish, namely manual induced spawning of brachymystax lenok. The invention causes spawning time to centralize, the spawning time is shortened by 10-15 days, and the hatching rate reaches 60%-70%; manual induced spawning is performed to breed the parent fish, the induced spawning success rate of the male fish reaches 100%, and the induced spawning success rate of the female fish reaches 40-50%; manual induced spawning is performed on wild parent fish, the induced spawning success rate of the male fish reaches 100%, and the induced spawning success rate of the female fish reaches 50-80%.

Description

technical field [0001] The invention relates to a method for artificially induced spawning of fish. Background technique [0002] Lepidoptera belongs to the family Salmonidae and is a cold-water fish. Due to human economic activities, overfishing and other reasons, the natural population of Lepidoptera has been greatly reduced and is on the verge of extinction. It has been listed as a second-class protected aquatic wild animal in the country. Artificial breeding and breeding have increased the population and effectively protected the species. After reaching sexual maturity, the leptospirosis relies on changes in water temperature and water flow to stimulate spawning, and has the habit of digging pits to bury eggs for hatching, but the spawning time is not concentrated, the spawning cycle is long, the eggs cannot be collected, and the hatching rate is low. It is 30~40%, and frequently checking the maturity of broodstock makes the body of broodstock seriously injured, and mul...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of non-concentrated spawning time, long spawning cycle and low hatching rate in existing leptospirosis, and propose a method for artificially inducing spawning of leptospirosis