Method for improving in vitro hatching rate of fertilized eggs of macrobrachium nipponense

Abstract

The invention discloses a method for improving the in vitro hatching rate of fertilized eggs of macrobrachium nipponense. The method comprises the following steps that 1, macrobrachium is selected, wherein the length of the macrobrachium body carrying eggs is greater than 4 cm, and the egg holding volume is 1,500 grains or above; 2, the macrobrachium is cultured, wherein plastic water grass is placed in a culture pond for the macrobrachium to inhabit, culture water is changed every 2 days, and the water exchange amount is 1 / 3 of the total water volume; 3, the fertilized eggs are separated, wherein the fertilized eggs are the fertilizer eggs obtained when the macrobrachium carrying the eggs is cultured until two black eye points appear in the eggs; 4, hatching is conducted; 5, hatching management is conducted. According to the method for improving the in vitro hatching rate of the fertilized eggs of the macrobrachium nipponense, the in vitro hatching cycle of the fertilized eggs can be effectively shortened, cumbersome operation in the hatching process can be reduced, the convenience of management in the hatching process can be increased, and the phenomenon that the fertilized eggs are infected with water mold after leaving the body and in the hatching process can be effectively avoided, so that the in vitro hatching rate of the fertilized eggs of the macrobrachium is effectively improved.

Description

technical field [0001] The invention relates to the technical field of artificial breeding of shrimps in aquaculture, in particular to a method for improving the in vitro hatching rate of fertilized eggs of Macrobrachium japonicus. Background technique [0002] Macrobrachium japonicus belongs to the decapod order, the long arm shrimp family, and the genus Macrobrachium, commonly known as freshwater shrimp or river shrimp, and is widely distributed in freshwater waters in my country; the shrimp has the advantages of tender meat, delicious taste, and rich nutrition, and is popular among consumers. It is an important economic shrimp in my country. During the artificial breeding process of Macrobrachium prawns, due to the long-term use of the "catch the big and keep the small" round-catching market model, the size of the parental bodies used for reproduction in the later period has been continuously reduced, which has virtually formed a growth disadvantage of Macrobrachium prawns...

AI Technical Summary

Problems solved by technology

However, this technology not only requires special treatment of hatching water, but also the hatching time is as long as 260-650 hours, the daily management work of the hatching process is relatively heavy, and long-term hatching is prone to operational errors, resulting in large fluctuations in the hatching rate; in this technology Under certain conditions, the hatching rate of fertilized eggs in vitro is 65.4% to 70.8%, with an average of 67.9%, which is still at a low level; The Key Technology of Macrobrachium Fertilized Egg Hatching in Vitro

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