Establishment method of all-male micropterus salmoides production system

Abstract

The invention discloses a n establishment method of an all-male micropterus salmoides production system. The method comprises the following steps: (1) domesticating: domesticating the micropterus salmoides to eat artificial compound feed before sex differentiation of juvenile fish of the micropterus salmoides; (2) sex reversal: treating young micropterus salmoides by using hormone in a sex differentiation sensitive period, and reversing the young micropterus salmoides into physiological female fish with a reproductive function; (3) parent vitamin fortification: treating the parent fish with hormone, and adding vitamins into feed for nutrition fortification 3 months before sexual maturity of the parent fish; (4) test mating: mating physiological female fish and normal male fish for spawning, and deducing the sex genetic type of the hormone-treated parents according to the sex proportion of filial generations of the female fish and the normal male fish; (5) expanding of sex-reversal female fish: performing sex hormone treatment by using the same method, and when a test mating result is obtained, reserving a filial generation of the sex-reversal female fish as a breeding parent; and (6) taking individuals treated by sex hormones of the sex reversal offspring as a female parent group, taking normal male fishes as a male parent group, and establishing a production system capable of continuously producing all-male micropterus salmoides fries.

Description

technical field [0001] The invention belongs to the field of fish parthenogenesis technology or fish artificial sex control technology, and more specifically relates to a method for establishing a production system for all male California perch Background technique [0002] California perch, scientific name largemouth bass (Largemouth bass, Micropterus salmoides), belongs to Perciformes, sunfish family. In 2019, the national aquaculture output reached 480,000 tons, nearly double that of 243,000 tons in 2012 (China Fishery Statistical Yearbook). The output of freshwater fish ranked 10th, and the output value of the aquaculture industry alone exceeded 26 billion yuan. fish. Calculated according to the current production, the country needs nearly 2 billion large-sized seedlings of California perch every year, and more than 20 billion fishes. With the increase of production, the demand for seedlings is constantly increasing. The current seed supply is far from meeting the need...

AI Technical Summary

Problems solved by technology

The current seed supply is far from meeting the needs of current industrial development

[0003] The seed supply cannot meet the needs of industrial development. The main reason is that the survival rate of domesticated sea bass is low. According to statistics, the national California perch seed domesticated survival rate is less than 1%, which seriously affects the rapid development of its breeding industry.

Up to now, there is no report on the sex control technology of California sea bass in China

In foreign countries, although there are reports of using sex hormones to induce sex reversal of California perch juveniles, there are problems such as low induction rate, low survival rate of domestication, and inability of sex-reversed female fish to lay eggs, so it is impossible to establish a corresponding industrial system and industrial application

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