Breeding technology for large-size parents of Eriocheir sinensis

Abstract

The invention relates to a breeding technology for large-size parents of Eriocheir sinensis. The breeding technology comprises the step of selecting the athletic parents of the Eriocheir sinensis, wherein the size of the female crab is above 150g and the size of the male crab is above 200g; the breeding technology is characterized by comprising the following steps: from the last ten-day of October to the first ten-day of November per year, soaking the selected parents of the Eriocheir sinensis into fresh water with tiny running water and sufficient oxygen for 2-3 minutes, and then taking out; after 3-5 minutes, disinfecting by using potassium permanganate; temporarily breeding in an indoor glass reinforced plastic over-wintering pool; starting the over-wintering breeding for the parents of the Eriocheir sinensis in the middle ten days of December; at the beginning of March per year, at a mating moment, controlling the water temperature at 9-12 DEG C, wherein the male and female ratio is (1.5-2):1 and the mating density is 7-13 pieces / m<2>; after oogenesis, continuously aerating and increasing the inflating volume, wherein the breeding temperature for the larva of the Eriocheir sinensis is at 24-25 DEG C and the breeding seawater salinity is 1.8%; and feeding rotifera, fairy shrimp larva and fresh water cladocerans biological baits.

Description

technical field [0001] The invention relates to the breeding of Chinese mitten crabs, in particular to a method for large-scale parental breeding of Chinese mitten crabs. Background technique [0002] Chinese mitten crab (Eriocheirs inensis) belongs to Crustacea, Decapod order, Crabidae, Eriocheir genus, commonly known as river crab, hairy crab, is a special economic aquatic product mainly cultivated in my country. Since the 1990s, the cultivation of river crabs has developed rapidly, and relying on the fishing of natural crab seedlings is far from meeting the market demand. Only artificial seedlings can be used to fill the gap of crab seedlings; however, due to the constraints of breeding technology and the drive of market interests, the current Most of the river crab nursery farms use small-sized river crab broodstock (80-100 grams) to raise seedlings, and use small-sized river crab broodstock to breed year after year, resulting in small-scale commercial crabs, poor appea...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of low overwintering survival rate of large-scale Chinese mitten crab parents, difficulty in ovulation after mating, high mortality rate of ovum-bearing crabs, and low seedling output. Provides a technology for indoor overwintering, mating and oviposit crab hatching and cultivation of large-scale brood crabs of Chinese mitten crabs