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Method for ecologically breeding river crabs

An ecological, river crab technology, applied in the field of river crab breeding

Inactive Publication Date: 2012-09-12
SUZHOU WUZHONG DISTRICT LINHU MODERN FISHERY DEV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The germplasm of the crabs bred is not pure, and the characteristics of Chinese mitten crabs in the Yangtze River system are not obvious; the average yield per mu is low, and the qualified rate of large-scale high-quality is also low, which is not conducive to improving the industrialization process of river crabs

Method used

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Embodiment Construction

[0015] River crab ecological breeding method of the present invention comprises the following steps:

[0016] 1) Select high-quality megalopa

[0017] (1) The imported and screened Eriocheir sinensis in the Yangtze River system with obvious characteristics and a size of 150-200 grams per crab is used as the seedling parent, and the breeding unit sends special personnel to carry out intensive breeding and directional breeding of seedlings in special ponds;

[0018] (2) Adhere to the standards and check and accept crab seedlings:

[0019] Adopt the method of "four inspections and one sampling" to check and accept crab seedlings, namely:

[0020] a. Check whether the larvae are seven days old, whether they are from the same batch of seedlings, and whether the specifications are consistent;

[0021] b. Check whether the body color of the larvae is consistent and golden yellow, so as to prevent the young and old seedlings from being uneven;

[0022] c. Look at the strength of ...

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Abstract

The invention discloses a method for ecologically breeding river crabs. High-quality river crab larvae of Chinese mitten crabs belonging to the Yangtze River system and with obvious crab characteristics are selected and placed into a breeding pond with various waterweeds to breed, wherein slligator alternenthera grass and Elodea nuttallii are planted in the breeding pond; the slligator alternenthera grass accounts 50 to 60 percent of the water surface area of the breeding pond; and the Elodea nuttallii is planted in the area where the slligator alternenthera grass is not planted and is arranged according to the requirement of planting one cluster in 1 to 2 square meters. By the method for ecologically breeding the river crabs, the river crabs have pure germplasm and obvious characteristics of the Chinese mitten crabs belonging to the Yangtze River system; 200 kilos of the river crabs can be produced per mu averagely; large-scale high-quality qualified ratio can reach over 87 percent; various defects in sporadic breeding can be overcome; the breeding area can be saved by 50 percent; popularization and application of improved variety are facilitated; and the industrialization progress of the river crabs is improved.

Description

technical field [0001] The invention relates to a method for breeding river crabs and belongs to the technical field of aquatic crab breeding. Background technique [0002] In the prior art, river crab breeding often adopts the method of cultivating in normal water ponds. The germplasm of the crabs bred is not pure, and the characteristics of Chinese mitten crabs in the Yangtze River system are not obvious; the average yield per mu is low, and the qualified rate of large-scale high-quality is also low, which is not conducive to improving the industrialization process of river crabs. [0003] Contents of the invention [0004] The purpose of the present invention is to provide a method for ecological breeding of river crabs that utilizes the mutually beneficial and complementary relationship between crabs and grasses to create a breeding pond ecological environment to achieve improved species, high yield and high efficiency in order to overcome the deficiencies in the prior...

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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