Method for promoting mating and oogenesis of freshwater shrimps

Abstract

The invention discloses a method for promoting mating and oogenesis of freshwater shrimps. The method comprises the following key points that 1, high-quality parents are selected in late autumn to serve as backup parent shrimps to make preparation for scale young shrimp breeding of next year; 2, enhanced cultivation is performed on the parents in autumn, winter and spring to accumulate a good material basis for gonad development of the parents; 3, temperature increasing is performed in a workshop for promoting maturity of the parents in advance, the temperature is gradually increased to be within the temperature range required by freshwater shrimp breeding, sufficient amount of high-quality feed is put, and gonad maturity development, mating and spawning are promoted. According to the method, through an ecological regulation and control method, the mating rate of the freshwater shrimp parents can reach 90% or above without using any medicine, the parents can mate and spawn nearly one month in advance, the seed cultivation survival rate is increased, the growth period of young freshwater shrimp cultivation and adult shrimp culture is made ahead, and the high popularization value is achieved in northern China.

Description

technical field [0001] The invention relates to the field of aquaculture, in particular to a method for promoting mating and oviposition of freshwater shrimp. Background technique [0002] Freshwater prawn, also known as river prawn, scientific name Macrobrachium japonica, belongs to Arthropoda, Crustacea, Longarm Shrimp family, Macrobrachium genus, is a unique freshwater shrimp in Japan and China. In my country, green shrimps are widely distributed in rivers and lakes in the north and south. Green shrimps are highly adaptable, omnivorous, short breeding cycle, strong fecundity, rich in nutrition, and high in market price. They are popular among consumers. It is a valuable aquatic product and can be exported to earn foreign exchange, so it is a promising breeding species. [0003] Baiyangdian green prawns have thin shells, tender meat, no fishy taste, no thorns, and delicious taste. It has been known as one of the three famous and precious green prawns in my country in histo...

AI Technical Summary

Problems solved by technology

If so, there are two unfavorable factors. First, in June and July, the water temperature rises rapidly, sometimes exceeding the optimum range, which is not conducive to improving the survival rate of seedling cultivation.

Second, the short growth period is not conducive to the cultivation of large-scale commercial shrimp

[0005] There are some domestic reports on promoting the sexual maturity of freshwater shrimp, mainly including progesterone injection, laser irradiation, eye stalk removal, etc., all of which have achieved good results; There are only about several hundred to 3000 grains in the tail, and large-scale seed breeding of freshwater shrimp needs a large number of seed shrimps. The above methods of promoting sexual maturity of freshwater shrimp can not meet the needs of actual production; Increase the mortality rate of breeding shrimp