Method for cultivating artificially reproduced parent fish of sturgeon

Abstract

The invention discloses a method for cultivating artificially reproduced parent fish of sturgeon. According to the method, preparative parent fish is screened systematically and purposefully in multiple stages from advanced fry to form a stable parent fish preparative population, the number of the preparative fish to be raised as parent fish can be guaranteed, the number of egg-laying population can be increased, and the whole fertility can be improved; the parent fish population is further optimized by selecting and raising the parent fish, the parent fish is subjected to enhanced raising indifferent tanks after sex of the parent fish is mature, the parent fish has excellent gonad development by adjusting the water temperature and nutrition for raising, and fertilized eggs with excellentquality can be obtained. Parent sturgeon is carefully raised after delivery, so that the casualty rate of delivered parent sturgeon is reduced, and the limited parent sturgeon resource is protected.Therefore, the brood amount and induced spawning rate of sturgeon can be improved, and high-quality artificial reproduced parent population with high reproductivity capacity can be formed; and the fertility rate and hatching rate can be guaranteed, the fry seeds have high survival rate, and the development of artificial sturgeon raising industry in China can be favored.

Description

technical field [0001] The invention relates to a breeding method for artificially breeding broodstock of sturgeon. [0002] technical background [0003] Sturgeon is an ancient fish and has the reputation of "living fossil". Sturgeon is large and grows fast. It not only has important economic values ​​such as food, nutrition, nourishment, health care, medicinal and ornamental, but also has important scientific research value. According to reports, there are 27 species and several subspecies of sturgeons in existence. These sturgeons are mainly distributed in eastern Europe, the east coast of North America and the east and west coasts around the North Pacific Ocean. In recent years, due to factors such as environmental pollution and overfishing, the ecosystem of sturgeon has been severely damaged. Some species of sturgeon, such as Chinese sturgeon, are even on the verge of extinction. In order to save the endangered sturgeon and meet the market demand, my country has starte...

AI Technical Summary

Problems solved by technology

According to statistics, the demand for fertilized eggs and seedlings of sturgeon breeding in my country reaches 20 million to 25 million grains (tails) per year. The rate and emergence rate are not high, and most of the fertilized eggs and seedlings rely on imports, which are expensive and costly, which restricts the development of artificial breeding industry of sturgeon in my country.