Yearly artificial propagation method of mandarin fish

Abstract

The invention discloses a yearly artificial propagation method of mandarin fish. With the adoption of an ecological and physiological adjustment method, baby fish of mandarin fish are born every 20-30days, thus shortening propagation period and greatly increasing yearly birth rate. Since baby fish can be utilized frequently, boby fish can breed 9-12 times, thus improving the utilization rate andartificial propagation efficiency of baby fish, reducing the stock of baby fish and the cost used to cultivate baby fish, and increasing the ecnomic benefits by 6 times and above. According to the propagation method disclosed by the invention, the spawning rate, the fertility rate and the hatching rate of baby fish are high; the quality of fry is good; fry reaching sales specifications of 3 cm whole length are obtained after being cultivated for 5-20 days; the economic benefits of farmers are increased; artificial propagation of mandarin fish is no affected or limited by seasons or time; the long-standing problem of early releasing of fry in cold springs and insufficient fry out of season is solved; fry varieties are supplied year in year out; the purpose of balanced production is achieved; and mass production of mandarin fish fry can be facilitated.

Description

technical field [0001] The invention belongs to the technical field of fish breeding, and in particular relates to a method for artificial breeding of mandarin fish throughout the year. Background technique [0002] Mandarin fish, commonly known as sweet-scented osmanthus fish, fat mandarin fish, etc., belongs to Perciformes, Perciformes, Percisidae, and Siniperca genus. Under natural conditions, it likes to inhabit clean water bodies with lush aquatic plants such as rivers, lakes, and reservoirs. It is a rare and precious fish. of freshwater economically farmed fish. Because of its rich nutrition, delicious meat, rich in protein, less thorns and more meat, it is deeply loved by consumers, has high economic value, and has a broad market prospect. In recent years, the aquaculture area of ​​mandarin fish has continued to increase, and the aquaculture output has continued to increase. In 2018, the national aquaculture output reached 315,900 tons, of which the aquaculture outpu...

AI Technical Summary

Problems solved by technology

At present, the artificial breeding of mandarin fish in my country mostly adopts the method of breeding once a year, and there are also attempts to reproduce twice or three times a year, but there are problems such as the death of parents, low emergence rate in the later period, and high cost, so few adopt it.

Moreover, the reproduction of mandarin fish is seasonal. The spawning season is from May to July in the Yangtze River Basin, and from April to August in South China. With the rise of factory farming, the demand for mandarin fish seedlings is increasing. Insufficient supply of seedlings and unbalanced supply throughout the year restrict the sustainable and healthy development of mandarin fish farming industry