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Method for breeding river crabs in fresh water

A technology of freshwater culture and river crab, which is applied in fish farming, application, climate change adaptation, etc. It can solve the problems of short life cycle of river crab, low price of river crab, and high breeding benefits, so as to improve the vigor of life, reduce the cost of breeding, The effect of improving the survival rate

Inactive Publication Date: 2018-04-20
五河县茂源水蛭生态养殖专业合作社
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The life cycle of river crabs is short, and the breeding benefits are great. However, as people's requirements for the quality of river crabs are getting higher and higher, different grades of river crabs are distinguished. The industry is also facing the choice of elimination and breakthrough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A method for cultivating river crabs in freshwater, comprising the following steps:

[0017] (1) Select a natural river pond with a surrounding green area covering 80-90% as the breeding ground, control the highest water temperature in the daytime range of 24-28°C, the lowest water temperature in the night at 13-18°C, and the average dissolved oxygen at 4.4-4.6 The dissolved oxygen at the bottom of the pool is in the range of 5.3-5.5 mg / l, the pH value of the water is in the range of 7.2-7.5, the lowest transparency is in the range of 40-50 cm, and the highest ammonia nitrogen content is in the range of 0.14-0.16 mg / l. The thickness of the bottom silt is in the range of 6-8 cm;

[0018] (2) Before stocking river crab seedlings, use the prepared biological water immersion transition culture for 2 days. The content of salt in the biological water is 0.12%, the content of potassium permanganate is 0.03%, and the content of methylene blue is 0.01%. Screen and remove dead cr...

Embodiment 2

[0024] A method for cultivating river crabs in freshwater, comprising the following steps:

[0025] (1) Select a natural river pond with a surrounding green area covering 80-90% as the breeding ground, control the highest water temperature in the daytime range of 24-28°C, the lowest water temperature in the night at 13-18°C, and the average dissolved oxygen at 4.4-4.6 The dissolved oxygen at the bottom of the pool is in the range of 5.3-5.5 mg / l, the pH value of the water is in the range of 7.2-7.5, the lowest transparency is in the range of 40-50 cm, and the highest ammonia nitrogen content is in the range of 0.14-0.16 mg / l. The thickness of the bottom silt is in the range of 6-8 cm;

[0026] (2) Before the river crab seedlings are stocked, use the prepared biological water immersion transition culture for 2 days. The content of salt in the biological water is 0.15%, the content of potassium permanganate is 0.04%, and the content of methylene blue is 0.02%. Screen and remove ...

Embodiment 3

[0032] A method for cultivating river crabs in freshwater, comprising the following steps:

[0033] (1) Select a natural river pond with a surrounding green area covering 80-90% as the breeding ground, control the highest water temperature in the daytime range of 24-28°C, the lowest water temperature in the night at 13-18°C, and the average dissolved oxygen at 4.4-4.6 The dissolved oxygen at the bottom of the pool is in the range of 5.3-5.5 mg / l, the pH value of the water is in the range of 7.2-7.5, the lowest transparency is in the range of 40-50 cm, and the highest ammonia nitrogen content is in the range of 0.14-0.16 mg / l. The thickness of the bottom silt is in the range of 6-8 cm;

[0034] (2) Before the river crab seedlings are stocked, use the prepared biological water immersion transition culture for 3 days. The content of salt in the biological water is 0.14%, the content of potassium permanganate is 0.05%, and the content of methylene blue is 0.03%. Screen and remove ...

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Abstract

The invention relates to the technical field of river crab breeding, and discloses a method for breeding river crabs in fresh water. By means of the modes of selection of a breeding site, river crab seedling breeding pretreatment, management enhancing in the shell changing period and the like, the wild natural environment is simulated, the capacity of the river crabs adapting to the surrounding environment is trained, the vitality of the life of the river crabs is improved, the bred river crabs are bred to be 40-50 g heavier than the river crabs of the same species, the survival rate of the river crabs is increased by 15%-18%, the per mu yield is increased by 20%-21%, the river crabs are large in size and delicious in taste, the nutritional ingredients and the content are significantly increased, the degree of popularity is high, the water area ecological environment balance after breeding is built, breeding can be conducted by turns, the breeding cost is lowered, and the economic benefit is significantly increased.

Description

technical field [0001] The invention belongs to the technical field of river crab cultivation, and in particular relates to a method for cultivating river crabs in fresh water. Background technique [0002] River crabs are also called "crabs" and "hair crabs". The carapace formed by the combination of the head and the chest is square and hard. There is a pair of eyes on the front of the body, and two pairs of very sharp crab teeth on the side. The first pair of appendages of the crab are called chelicerae, the surface is covered with fluff, and there are 4 pairs of gaiters behind the chelicerae, the sides are flat and long, and the abdominal limbs have degenerated. The male and female of the river crab can be distinguished from its abdomen: the abdomen of the female is round, and the abdomen of the male is triangular. The river crab is a large crustacean with a body divided into 21 segments. Since the head and thorax segments are healed with each other, the whole body is d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/59
CPCA01K61/59Y02A40/81
Inventor 张奎
Owner 五河县茂源水蛭生态养殖专业合作社
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