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Germplasm purification and rejuvenation method for Eriocheir sinensis in Yangtze River system

A Chinese mitten crab, purification and rejuvenation technology, applied in fish farming, application, climate change adaptation and other directions, can solve the problems of weak disease resistance, low average yield per mu, low survival rate, etc. Pure germplasm, characteristic effect

Inactive Publication Date: 2012-09-12
SUZHOU WUZHONG DISTRICT LINHU MODERN FISHERY DEV
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AI Technical Summary

Problems solved by technology

[0003] The germplasm of the crabs bred by the above-mentioned crab breeding method is not pure, and the characteristics of the Chinese mitten crab in the Yangtze River system are not obvious; the size of the bred crabs is irregular, the disease resistance is weak, and the survival rate is low; , and it is not conducive to improving the industrialization process of river crab

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0021] The method for purifying and rejuvenating the germplasm of Chinese mitten crab in the Yangtze River system of the present invention comprises the following steps:

[0022] 1. Optimizing the parents of river crabs

[0023] 1. Introduce and screen the Chinese mitten crabs that grow in the natural waters of the Yangtze River;

[0024] In the middle and late November of each year (before and after the beginning of winter in the lunar calendar), the river crabs grown in the natural waters of the Yangtze River are introduced for one-to-one screening. The screening criteria are:

[0025] (1) The appearance characteristics of river crabs in the Yangtze River system are obvious: the carapace is obviously raised, the 4 frontal teeth are notched deeply, and they are in the shape of "U", and there are 6 verrucous protrusions on the back of the forehead, and the front pair protrudes forward like a hill. , the middle and back pair are obvious, and the 4th side teeth are small and ob...

Embodiment 2

[0051] The Chinese mitten crab fine variety F4 of the Yangtze River system selected and bred by Shanghai Ocean University was selected, and in the process of crab seed cultivation and adult crab cultivation, it was screened step by step, purified and rejuvenated, and became the parent of seedlings; the remaining steps were the same as in Example 1.

[0052] The beneficial effect of the present invention is mainly reflected in: the germplasm of the river crab bred by the method for purifying and rejuvenating the germplasm of the Yangtze River water system Eriocheir sinensis according to the present invention is relatively pure, and the characteristics of the Chinese mitten crab in the Yangtze River water system are obvious; , strong disease resistance, high survival rate.

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Abstract

The invention discloses a germplasm purification and rejuvenation method for Eriocheir sinensis in the Yangtze River system. The method includes the steps of firstly, optimizing river crab parents, and screening breeding parents of Eriocheir sinensis in the Yangtze River system one on one; secondly, separating female and male crabs, and performing enhanced cultivation in special ponds; thirdly, selecting the female and male crabs subjected to enhanced cultivation, and allowing for mating; fourthly, selecting egg-carrying crabs; and fifthly, breeding megalopa. Germplasm of the river crabs bred by the method is pure, features of the Eriocheir sinensis in Yangtze River system are evident, and the bred river crabs are large and neat and have high disease resistance and survival rate.

Description

technical field [0001] The invention relates to a method for purifying and rejuvenating the germplasm of Chinese mitten crabs in the Yangtze River system, and belongs to the technical field of aquatic crab breeding. Background technique [0002] The river crab breeding method in the prior art generally adopts the following methods: select a place that is sheltered from the wind and faces the sun, the environment is quiet, and the water source is sufficient to build a cultivation pond, the depth of the pond is 1-1.5 meters, and the water level is between 0.5-1.0 meters; The number of seedlings bred is between 120,000 and 160,000 per kilogram; the stocking density per mu is about 400,000; after the larvae enter the pond, add new water reasonably, and the daily water change is more than 1 / 3; reasonable feeding and disease control. [0003] The germplasm of the crabs bred by the above-mentioned crab breeding method is not pure, and the characteristics of the Chinese mitten crab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 王惠良张关海
Owner SUZHOU WUZHONG DISTRICT LINHU MODERN FISHERY DEV
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