Method for cultivating large 3-age river crabs

A breeding method and large-scale technology, applied in fish farming, application, climate change adaptation, etc., can solve problems such as difficult large-scale production, and achieve the effects of solving neutral precocity, improving economic benefits, and simple implementation

Inactive Publication Date: 2012-08-22
FRESHWATER FISHERIES RES CENT OF CHINESE ACAD OF FISHERY SCI
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Problems solved by technology

However, due to the influence of facility conditions, it is difficult to form large-scale production

Method used

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specific Embodiment

[0052] At the end of April 2009, one million bean crabs with a size of 10,000 / kg were purchased from the Chongming River Crab Breeding Farm, and they were transported to the Qinghai breeding farm by means of dry transportation of crab seedling boxes, where they were cultivated at a density of 8,000 / mu. August 2009 In April, a sampling inspection found that bean crabs had been bred into 1400 / kg crabs. After overwintering naturally, the 1400 / kg crabs were cultivated in separate ponds in April 2010 with a breeding density of 4000 / mu. In October 2011, a sampling inspection found that the crabs had been bred to a size of 20 / kg. In 2011, crab species with a size of 20 / kg were put into the Yangcheng Lake Hairy Crab Breeding Base, and the stocking density was 350 / mu for intensive breeding. In 2011 In October, the average size of adult crabs was 198 grams / piece. During the breeding period, no sexual precocity was found in adult crabs. The yield per mu was 60 kg, the output value was 14,...

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Abstract

The invention discloses a method for cultivating large 3-age river crabs, which comprises the steps of selecting cultivation water areas, selecting and transporting pea crabs, primarily cultivating crab species, cultivating large crabs, cultivating the 3-age river crabs and the like. The method for cultivating the large 3-age river crabs relies on a matured juvenile-crab cultivating and adult-crab breeding technology at present, and the pea crabs are moved to high altitude areas to be cultured. By utilizing special natural conditions suitable for the river crab to grow in the high altitude areas, the pea crabs are cultivated into large crab species which are intensively cultivated in southern ponds, and the purpose of cultivating the large adult crabs is achieved accordingly. The problem that the size of the cultivated adult crabs is not ideal due to the germplasm problem is effectively solved, the problem that the adult crabs and the crab species have precocious puberty in the cultivating and breeding process is solved, the large-scale production of the cultivated large adult crabs can be achieved, and the economic benefit of river crab cultivation is further improved. In addition, the method for cultivating the large 3-age river crabs is simple in implementation, and the adult crabs cultivated by means of the method is larger than adult crabs cultivated by means of a common cultivating method.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, in particular to a method for cultivating large-sized third-year-old river crabs. Background technique [0002] Chinese mitten crab, also known as river crab, hairy crab, clear water crab, hairy crab or crab, is a kind of economical crab with delicious taste and rich nutrition, and is one of the traditional valuable aquatic products in China. River aquaculture is one of the representative industries of aquaculture unique to our country, and it is also one of the main industries that earn foreign exchange from the export of aquatic products in our country. In 2000, the national river crab farming output was 232,000 tons. In 2001, 790,000 hectares of river crabs were cultivated nationwide, with an output of 286,000 tons and an output value of 14.3 billion yuan; exports of 10,000 tons and about 100 million US dollars accounted for 2.2% and 6.5% of the total export volume of aquaculture aquatic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 尤洋周彦锋刘凯段金荣
Owner FRESHWATER FISHERIES RES CENT OF CHINESE ACAD OF FISHERY SCI
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