High-density overwintering cultivating method of macrobrachium rosenbergii parents

Abstract

The invention discloses a high-density overwintering cultivating method of macrobrachium rosenbergii parents. The high-density overwintering cultivating method comprises the following steps: (1) when the water temperature is above 20 DEG C before winter every year, selecting parent macrobrachium rosenbergii for overwintering cultivation from female macrobrachium rosenbergii and male macrobrachium rosenbergii in that very year; (2) performing in-vitro disinfection to the parent macrobrachium rosenbergii; (3) shearing one or all sides of chela on second ambulatory leg of the disinfected parent macrobrachium rosenbergii through disinfected tools; (4) putting the parent macrobrachium rosenbergii subjected to chela shearing operation, back to the parent macrobrachium rosenbergii pool for recuperating and recovering, wherein the feeding quantity of baits is 30%-50% of the normal eating quantity, and the content of dissolved oxygen is not less than 5mg / L, the water temperature is not lower than 20 DEG C, and the cultivating density is 40 / m<2> to 60 / m<2>; and (5) after the recuperating and recovering period, removing redundant shelters in the parent macrobrachium rosenbergii pool, controlling the water temperature to be between 19 DEG C and 21 DEG C, wherein the management of other aspects is operated according to the requirements of routine overwintering management. The high-density overwintering cultivating method has the beneficial effects of not only being capable of increasing the overwintering cultivating density of the macrobrachium rosenbergii parents by more than one time, but also being capable of guaranteeing the survival rate to achieve more than 90%, and having considerable economic benefits.

Description

technical field [0001] The invention relates to an aquaculture method, in particular to a high-density overwintering method for parents of Macrobrachium rosenbergii, belonging to the field of cultivation technology. Background technique [0002] Sexually mature Macrobrachium rosenbergii, the male shrimp generally has a body length of about 40cm and a weight of about 600g, and the female shrimp generally has a body length of about 25cm and a weight of about 200g. The body surface of sexually mature Macrobrachium rosenbergii is covered with a layer of chitinous carapace, the body color is light blue, with brown-yellow stripes in between, the whole body is divided into two parts, the cephalothorax and the abdomen. The whole body of a shrimp is composed of 20 segments, and each body segment (except the tail) has a pair of appendages. The first two pairs of appendages are mainly used for the sense of smell and touch. The jaw and the second mandible together form the mouth organ....

AI Technical Summary

Problems solved by technology

[0006] 2. Although winter-age female shrimps have a large amount of eggs, during the hatching process, the fertilized eggs are easy to fall off, and the hatched larvae are less, and the time interval between repeated eggs is long, and the number of rebirths is small;

[0007] 3 Most of the winter-age female shrimps lose their ability to reproduce, and the rate of hatched larvae is also low

[0012] However, this method of reducing the breeding density limits the improvement of breeding efficiency, increases the investment in supporting facilities, and raises the cost of breeding