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High yield culturing method for Chinese mitten juvenile crabs

The technology of a Chinese mitten crab and its breeding method is applied in the field of high-yield cultivation of Chinese mitten crab seedlings, which can solve the problems of unsatisfactory crab seedling period and slow temperature recovery, so as to improve the survival rate of larvae, reduce difficulty, and build reasonable effect

Inactive Publication Date: 2015-01-28
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there is also a fly in the ointment. Since the crab seedlings are produced in the central part of the coastal area of ​​Jiangsu, the temperature returns slowly every spring. Compared with the inland and the southern regions of the Yangtze River Basin, the temperature is relatively low. The period of large-scale output of crab seedlings cannot meet the needs of some areas.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The high-yield cultivation method of the Chinese mitten crab seedling in embodiment 1 specifically comprises the steps:

[0027] a. Construction of nursery ponds: build long-shaped nursery ponds running north-south, with an area of ​​660m2 2 , the width of the upper mouth of the nursery pond is 12m, the width of the bottom of the nursery pond is 7.5m, and the slope ratio is 1:1; the average water depth of the nursery pond is 2.0~2.2m; a scaffold is built with bamboo poles on the nursery pond, and the plastic film is covered on the frame. Greenhouses, 0.8 per m in nursery pools 2 The proportion of oxygen-increasing head;

[0028] b. Inlet water disinfection: The nursery pool starts to inflow water 20 days before the parent crabs hang the baskets and cloth seedlings. The water quality requirements of the inflow water must meet the fishery water standard GB11607-89, with a salinity of 18‰ and a pH of 8.2; in mid-February , use trichlorfon and bleaching powder to disinfec...

Embodiment 2

[0036] The high-yield cultivation method of the Chinese mitten crab seedling in embodiment 2 specifically comprises the steps:

[0037] a. Construction of nursery ponds: build long-shaped nursery ponds running north-south, with an area of ​​680m2 2 , the width of the upper mouth of the nursery pond is 12m, the width of the bottom of the nursery pond is 7.5m, and the slope ratio is 1:1; the average water depth of the nursery pond is 2.0~2.2m; a scaffold is built with bamboo poles on the nursery pond, and the plastic film is covered on the frame. Greenhouse, 0.9 per m in nursery pool 2 The proportion of oxygen-increasing head;

[0038] b. Inlet water disinfection: The nursery pool starts to inflow water 20 days before the parent crabs hang the baskets and cloth seedlings. The water quality requirements of the inflow water must meet the fishery water standard GB11607-89, with a salinity of 21‰ and a pH of 8.4; in mid-February , use trichlorfon and bleaching powder to disinfect ...

Embodiment 3

[0047] The high-yield cultivation method of the Chinese mitten crab seedling in embodiment 3 specifically comprises the steps:

[0048] a. Construction of nursery ponds: build long-shaped nursery ponds running north-south, with an area of ​​700m2 2 , the width of the upper mouth of the nursery pond is 12m, the width of the bottom of the nursery pond is 7.5m, and the slope ratio is 1:1; the average water depth of the nursery pond is 2.0~2.2m; a scaffold is built with bamboo poles on the nursery pond, and the plastic film is covered on the frame. Greenhouse, 1 unit / m in nursery pool 2 The proportion of oxygen-increasing head;

[0049] b. Disinfection of water intake: The nursery pool begins to enter the water 20 days before the parent crabs hang the seedlings in the basket. The water quality requirements of the intake water must meet the fishery water standard GB11607-89, the salinity is 25‰, and the pH is 8.5; in mid-February , use trichlorfon and bleaching powder to disinfec...

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Abstract

The invention relates to a high yield culturing method for Chinese mitten juvenile crabs. The method is characterized by comprising the steps of construction of a juvenile crab culturing pool, feeding of water, sterilizing, basket hanging and juvenile crab distributing of parent crabs, feeding of baits and regulating and control over water quality and water temperature. In the high yield culturing method, the juvenile crab culturing pool is reasonably constructed and is set to be in a rectangular shape in the north and south direction, the juvenile crabs are not high-densely clustered in the morning and at night, and the survival rate of the juvenile crabs is greatly improved. Rotifer living bodies are adopted as the baits, the water quality is not easy to deteriorate, and the water exchange quantity is greatly reduced. The juvenile crab culturing and emergence can be realized in advance, the emergence is realized by 20 days earlier than that of the traditional soil pool juvenile crab culturing method, and demands of partial areas on early juvenile crabs are met; the temperature of natural water is lower because of the juvenile crab culturing in advance, and the prevention and control difficulty over diseases is greatly relieved as much pathogenic microorganisms are not revived yet.

Description

technical field [0001] The invention relates to a high-yield cultivation method of Chinese mitten crab seedlings, belonging to the technical field of aquaculture cultivation. Background technique [0002] Chinese mitten crab (Eriocheir sinensis Milne-Edwards), also known as river crab, hairy crab, and hairy crab, is a large crustacean. It often migrates to the estuary where it goes out to sea every autumn to lay eggs. It hatches and develops from March to May of the next year. After becoming young crabs, they go up the river and continue to grow up in fresh water. The meat of river crab is fresh and tender, and it is a traditional high-grade aquatic product in my country. In recent years, due to people's development and utilization, its resources have declined rapidly. In 1981, 20,500 kg of natural crab seedlings were caught in the Yangtze River Estuary, but only 25 kg of natural crab seedlings were caught in 1982, and only 50 kg in 1987. To this end, scientists are activ...

Claims

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Application Information

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IPC IPC(8): A01K61/00
CPCY02A40/81A01K61/59
Inventor 黄金田吕富乔帼刘飞王峰唐玉江朱平沈永龙
Owner YANCHENG INST OF TECH
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