Chinese mitten crab breeding method

Abstract

The invention relates to a Chinese mitten crab breeding method. The method comprises the steps that Chinese mitten crabs are selected as parent crabs, and male parent crabs and female parent crabs are separated for temporary breeding before being subjected to mating; egg-carrying crabs are bred two months or above at the water temperature below 5 DEG C; the egg-carrying crabs lay eggs which grow into zoeas and big-eye larvae; crablets grow into juvenile crabs, seed crabs and mature crabs. In the process of growing from big-eye larvae to crablets and juvenile crabs, water quality in a culture pond is supposed to comply with regulations in Water Quality for Pollution-free Food Freshwater Aquaculture; the crablets at the stage I are later fed with fresh colorful millet together with coagulated pig blood and minced bean curd; animal bait takes up 70% or above before the seventh month and after the ninth month of the culture stage of the juvenile crabs, and 90% or above between the seventh month and the ninth month. Compared with existing breeding methods, the method has the advantages that the crabs grow quickly and are high in disease resistance; the weight of all crabs is increased by 10.2% compared with that obtained through the existing breeding methods; the disease occurrence rate is reduced from 8%-10% to 3% or below.

Description

technical field [0001] The invention relates to a method for cultivating Chinese mitten crabs. Background technique [0002] Chinese mitten crab (Eriocheirsisensis), commonly known as river crab, is a famous and high-quality aquatic product unique to my country. It is mainly distributed in the Yangtze River, Liaohe River, and Oujiang River in my country. Among them, the river crab in the Yangtze River system is famous for its fast growth, large size, strong disease resistance, and delicious taste. . Eggs laid by river crabs produce zoa larvae. In a suitable ecological environment, zoa larvae of river crabs evolve into adult crabs through megalopa, young crabs, juvenile crabs, and crab species. [0003] The Chinese velvet crab in the Yangtze River system is an important breeding object in the middle and lower reaches of the Yangtze River, and its breeding history has been more than 20 years. After more than 20 years of development, river crab aquaculture has become a unique ...

AI Technical Summary

Problems solved by technology

[0006] The present invention solves the problems that the existing river crab breeding method causes the crabs to be small and susceptible to disease, the quality of the river crabs and the economic benefits of raising crabs are relatively poor, and provides a pollution-free river crab ecological breeding technology model, thereby achieving ecological benefits The three major benefits, economic benefit and social benefit, have been simultaneously improved