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Method for breeding river crab

A breeding method and technology for river crabs, which are applied in the field of fishery ecological breeding, can solve the problems of susceptibility to diseases, poor quality of river crabs and poor economic benefits of crab breeding, and small individuals of river crabs, so as to improve the survival rate of breeding, improve product quality, and improve disease resistance. powerful effect

Inactive Publication Date: 2008-07-23
FRESHWATER FISHERIES RES INSITUTE OF JIANGSUPROVINCE
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AI Technical Summary

Problems solved by technology

[0006] This 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 poor. Benefits, economic benefits, and social benefits are simultaneously improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: in Yixing, Jintan, Baoying three demonstration areas of Jiangsu Province, carry out river crab breeding test according to the following steps

[0022] a. Breeding of parent crabs: Select Gaochun national-level Yangtze River Chinese mitten crabs as parent crabs. They are required to be physically strong, with complete appendages, well-developed gonads, free from disease and damage, and the female individual should be more than 100 grams, and the male individual should be more than 150 grams. The selection time for brood crabs is from late October to early November; the male to female ratio is 3:1. The male and female crabs are put into special pools respectively for temporary breeding, and the stocking density is preferably 100 kilograms per mu. During this period, fresh animal bait should be used as the main food, supplemented by plant bait.

[0023] b. Mating and rearing of parent crabs: Mating is carried out in a pond filled with seawater at a ratio of ...

Embodiment 2

[0047] Embodiment 2: In Yixing and Jintan two demonstration areas in Jiangsu Province, the river crab culture test was carried out according to the following method. Embodiment 2 and embodiment 1 are all the same as embodiment 1 except for the following differences: in step c river crab seedling cultivation, earth pond cultivation is adopted, and in step e ecological cultivation, lake net enclosure ecological cultivation is adopted. The differences are now described in detail.

[0048] c. River crab nursery, that is, eggs are produced from oviposit crabs to generate flea-shaped larvae, and then grow into megalopa. Crab nursery earthen pond nursery.

[0049] The shape of the earthen pond is preferably square, and the bottom of the pond is hard and free of silt. One end of the pool is provided with a water inlet valve, the other end is a water outlet, and a trumpet-shaped bottom hole water outlet is provided, and the section of the trumpet mouth is blocked by a silk screen. E...

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Abstract

The invention discloses a method for cultivating river crab, comprising the following steps: choosing China crab as parent crab, temporary culturing female and male crab separately, then mating; culturing the crab with ovum at temperature under 5 Deg C for more than 2 months; the crab with ovum producing out ovum and the ovum growing into flea larval, megalops larva, young crab, crab strain and adult crab. The water quality should be in accordance with the regulation of 'water quality regulation for fresh water cultivation' during process of megalops larva growing into young crab; supplying fresh minced fish and pig blood for I claver crab; the animal bait before July and after September for young crab culturing is over 70%, and from July to September is over 90%. Comparing with the invention is characterized by rapid growth, strong disease-resistant, the increased group weight by 10.2%, and reduced disease generation rate from 8%-10% to under 3%.

Description

technical field [0001] The invention relates to a method for cultivating river crabs, which belongs to the fishery ecological cultivating technology. Background technique [0002] Chinese mitten crab (Eriocheir sisensis H.), 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 grows fast, has a large size, strong disease resistance, and delicious taste. And famous. 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 mitten crab in the Yangtze River system is an important breeding object in the middle and lower reaches of the Yangtze River and other regions, and its breeding history has been more than 20 years. After more...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K61/00A61D19/00
CPCY02A40/81
Inventor 周刚朱清顺
Owner FRESHWATER FISHERIES RES INSITUTE OF JIANGSUPROVINCE
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