Method for Ecological Seedling Cultivation of Large-scale Eriocheir sinensis in Ponds

Abstract

The invention discloses a technology for ecological breeding of large Chinese mitten crabs (female crabs 150g and male crabs more than 200g) in a pond. The method comprises the steps of (1) selection and transportation of the large parent crabs, (2) mating of the parent crabs, (3) over-wintering fatting and management of the parent crabs, (4) catching and temporary breeding of egg-carrying crabs, (5) cage hanging and distribution of the egg-carrying crabs, (6) food organism culture, (7) zoea cultivation, (8) megalopa desalting. The technology for ecological breeding of the large Chinese mitten crabs in the pond is developed for emphasizing to improve the over-wintering survival rate and the egg-carrying rate of the large parent crabs and the survival rate of the egg-carrying crabs according to features of reproductive biology and reproductive ecology of the Chinese mitten crabs on a basis of in-pond ecological breeding work of large parent crabs. Technical practices of an inventor for nearly a year proves that unprecedented success on the in-pond ecological breeding of the large parent crabs is achieved, an in-pond ecological breeding technical system of the large parent crabs is established, and profound influence is made in the Chinese mitten crab breeding industry of our country.

Description

technical field [0001] The invention relates to a pond ecological breeding method for large-scale Chinese mitten crab (Eriocheirsinensis). Background technique [0002] Chinese mitten crab (Eriocheirsinensis), commonly known as river crab and hairy crab, is an extremely important aquatic economic animal in my country. In 2012, the national river crab production exceeded 600,000 tons, and the output value exceeded 40 billion yuan. It can be called a wonderful flower in my country's aquaculture industry. River crab is one of my country's important export-earning aquatic products and the most culturally rich aquaculture object, rich in cultural connotations. Therefore, river crab farming is one of the most dynamic and promising pillar industries in aquaculture in my country. In many areas of the country, the river crab industry is regarded as a pillar industry for adjusting the agricultural industrial structure, increasing farmers' income, developing the rural economy and buil...

AI Technical Summary

Problems solved by technology

The application of small-sized parent crabs has caused the degradation of the traits of the raised crabs, and the small size has reduced the breeding benefits, which has affected the sustainable development of the crab industry.

If this continues, the excellent germplasm of the unique Chinese mitten crab will soon be lost, which will bring serious and irreparable consequences.

[0004] Large-scale parent crabs are difficult to lay eggs, consume a lot of energy during the breeding process, have high parental mortality, low seedling yield, and high seedling cost. Therefore, large-scale parent crabs are not used in current nursery farms.

How to improve the survival rate and the number of seedlings of large-scale crabs is the key to the breeding of large-scale crab broods, but there is no research and production report on this aspect in China at present.

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