Cross breeding method of fine variety of paralichthysolivaceus

Abstract

A cross breeding method of fine variety of lefteye flounder is a cross breeding method for establishing high-yield cross breeding variety of lefteye flounder with the technologies of artificial selection, cross breeding, growth performance evaluation and anti-infective ability measurement. The method comprises the following methods: sieving of anti-infective cross parent, sieving of quickly-grown cross parent, cross breeding of lefteye flounders came from different countries, measurement of growth performance and anti-infective ability of cross seedlings. The method has the characteristics of strong pertinence, high efficiency, obvious effect, easy operation, and the like; the growth rate of cross breeding lefteye flounder seedlings is increased by about 30% compared with normal lefteye flounder seedlings, and the survival rate is increased by above 30% compared with the normal lefteye flounder seedlings. The technology develops a new way for curlturing seawater fish high-yield anti-infective variety, and is a high-yield fine variety culture method capable of being used in fish culture of fine variety; and the method is suitable for popularization and application of cultured fishes, and has important meanings and application values for improving culture yield of fishes.

Description

Hybrid Breeding Method of Fine Varieties of Flounder Technical field: The invention belongs to the aquaculture technology, and relates to a hybrid breeding method that can be used in the cultivation of high-yield and anti-infection fine varieties of fish. Background technique: Flounder (Paralichthysolivaceus) is widely distributed in the waters of China, Japan and Korea. It is one of the leading species of marine cultured fish in my country. Factory culture and cage culture are widely carried out in the north and southeast coast of China, and its output value occupies a considerable proportion in the aquaculture industry. At present, domestic flounder nursery manufacturers are all over Shandong, Hebei, Liaoning, Zhejiang, Fujian and other coastal provinces and cities. Especially in recent years, the flounder aquaculture industry has gradually expanded from Shandong to Fujian, becoming a national center mainly in the north and supplemented by the south. Leading species of ...

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to establish a method for cultivating a new variety of high-yield and anti-infection hybrid flounder, to provide a technical method for cultivating high-yield and anti-infection fine varieties of sea flounder and flounder, and to solve the problem of lack of high-yield and anti-infection fine varieties of sea flounder and flounder. Provide technical means for cultivating high-yield and anti-infection hybrid varieties for the marine fish farming industry