Method for breeding stichopus japonicus through shortening of aestivation period

Abstract

The invention discloses a method for breeding stichopus japonicus through shortening of the aestivation period, and belongs to the technical field of mariculture. According to the method, stichopus japonicus parents of a plurality of geography groups are collected, the rates of contribution of different geography groups, male stichopus japonicus and female stichopus japonicus to the offspring are controlled by controlling the spermiation time and the ovulation time of all the stichopus japonicus parents; in the high-temperature season of the summer of the next year during the growing period, stichopus japonicus individuals which do not enter the aestivation or finish aestivation are selected with the temperature of 28 DEG C as a threshold, and in the third year during the growing period, the temperature of 25 DEG C serves as the selection temperature threshold; continuous three generations of groups are cultivated, and the new stichopus japonicus breed with the short aestivation character is obtained. According to the method, double-end and double-time selecting is carried out for the stichopus japonicus aestivation time, the stichopus japonicus individuals which enter the aestivation later or finish the aestivation early are selected manually, two times of selecting is carried out in three years of the growing breeding cycle, and the stichopus japonicus aestivation time is shortened. By means of the breeding method, the stichopus japonicus individuals with the obvious and superior short aestivation time character can be obtained, the bait utilization rate and the breeding efficiency are increased, the growing speed is increased, the breeding cycle is shortened, and the stichopus japonicus breeding benefits are greatly improved.

Description

technical field [0001] The invention relates to a method for cultivating a short aestivation sea cucumber strain, which belongs to the technical field of seawater culture. Background technique [0002] Apostichopus japonicus is a typical temperate species. It is distributed in the vast northwestern Pacific coast from 35 degrees north latitude to 44 degrees north latitude. In my country, it is mainly distributed in the coastal waters of Shandong, Hebei, Liaoning and other places. It is one of the important economic species of mariculture in northern my country. Sea cucumber has high nutritional and medicinal value, and is known as the crown of ginseng. In recent years, due to the increase in market demand, the rapid development of sea cucumber aquaculture industry has been promoted. One of the highest industries, with an annual output value of up to 20 billion yuan at present, and it is the species with the highest output value of a single species of mariculture in my country....

AI Technical Summary

Problems solved by technology

The digestive tract of sea cucumbers degenerates during aestivation, and their weight also decreases. Therefore, the existence of this ecological habit obviously slows down the growth rate of sea cucumbers, prolongs the breeding cycle, and causes a lot of time and loss of income for artificial breeding.