Artificial propagation method of coregonus nasus

Abstract

The invention discloses an artificial propagation method of coregonus nasus. The method comprises the steps of parent fish culture, parent fish inspection, artificial egg collection and insemination,oosperm quality identification, artificial incubation and fry pond culture, and coregonus nasus fries are successfully propagated. According to the method, the success of the artificial propagation technology of the coregonus nasus is achieved for the first time, and the coregonus nasus fries are obtained and cultured through a pond culture method; and the culture effect of the coregonus nasus fries is improved, the fry culture cost is reduced, practical significance is achieved in solving the supply problem of the coregonus nasus fries, meanwhile, the problems that the current coregonus nasusculture varieties in the Xinjiang region are few, the fries depend on import, and the culture period is long can be effectively solved, the coregonus nasus exerts greater economic and social benefits, and the method is of great significance to the development of Xinjiang cold water fish industry.

Description

technical field [0001] The invention belongs to the technical field of fish reproduction, and in particular relates to an artificial reproduction method for Zier whitefish. Background technique [0002] Zill whitefish Coregonus nasus (Pallas, 1776) is mainly distributed in rivers and lakes of the Arctic Ocean water system north of 55° north latitude. It is a large cold-water fish and one of the important running water fish in Russia. "Polar Carp". In natural water bodies, Zier whitefish feeds on zooplankton, and then gradually turns to chironomus larvae, molluscs, oligochaetes and other insect larvae and benthic crustaceans, and adults are omnivorous. This fish is suitable for growing in waters with a water temperature below 11°C. It grows fast, has a large body, fine meat, and is rich in unsaturated fatty acids. [0003] Xinjiang is the first area in China to introduce and release whitefish fry on a large scale in China. Originally, there were no indigenous fish in Saili...

AI Technical Summary

Problems solved by technology

[0005] (1) Due to long-term use without paying attention to breed selection, the symptoms of germplasm degradation, early maturity, and individual miniaturization are particularly serious;

[0006] (2) So far there is not a set of mature technical specifications for artificial breeding of Zier whitefish, which leads to complete dependence on imports of Zier whitefish seedlings;

[0007] (3) At present, there is a lack of quality identification methods for fertilized eggs of Zier whitefish, and it is impossible to effectively distinguish high-quality and inferior fertilized eggs;

[0008] (4) All the open baits of whitefish are expensive artemia nauplii, and the breeding cost is high