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Crab cultivation method

A breeding method and technology for hairy crabs, applied in fish farming, climate change adaptation, animal feed, etc., can solve problems such as quality decline, disease spread, and hairy crab ecological environment destruction, and achieve strong disease resistance, significant economic benefits, and growth. quick effect

Inactive Publication Date: 2008-07-09
李怀章
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, hairy crab breeding in the Yellow River estuary has become an important way for local farmers to increase their income and become rich. With the development of hairy crab farming, there are also some problems that need to be solved. Generally, crab farmers use experience to breed crabs. Neglecting the ecological environment problems of breeding, random use of antibiotics, hormones and other drugs, and the use of industrial mixed feeds will cause damage to the ecological environment in which hairy crabs live, resulting in a decline in quality, and will also cause the spread of diseases and damage the economic benefits of crab farming.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The aquaculture water quality complies with the water quality standards stipulated in the "Water Quality for Freshwater Aquaculture". The annual water temperature is 7-25°C and the salinity is 1.5-3%. 30% of the total area, floating plants account for 30% of the total area, the water depth is 0.5m in spring, 0.6-1m in summer, and 1m in other seasons, the water is changed every 5-7 days in summer, and the water is changed every 15-20 days in other seasons. The depth of the water change is 25-35cm, drain first and then irrigate, and choose natural crab seedlings in the sea area or artificial crab seedlings cultivated in accordance with the principles of organic aquaculture. Take mixed culture of shrimp and crab. The stocking density of shrimp seedlings is 0.8-12,000 fish / mu, and the stocking density of crab seedlings is 350-450 / mu. They are caught in rotation and can catch 3-5 batches in one year. The feed is fresh or live animal and plant bait, the weight ratio of the b...

Embodiment 2

[0014] Similar to embodiment 1, its difference is to adopt crab and mandarin fish polyculture, the stocking density of mandarin fish fry is 0.5-0.6 ten thousand tails / mu, and the stocking density of crab fry is 300-400 / mu. Catch 2-5 batches. The feed is fresh or live animal and plant bait, the weight ratio of the bait is 60:40, and the daily amount of bait is 20%-35% of the body weight of crab seedlings.

Embodiment 3

[0016] Similar to Example 1, the difference is that crabs and silver carp are used for polyculture, the stocking density of silver carp seedlings is 0.6-0.8 ten thousand tails / mu, and the stocking density of crab seedlings is 400-500 / mu. Can catch 3-4 batches. The feed is fresh or live animal and plant bait, the weight ratio of the bait is 60:40, and the daily amount of the bait is 18%-30% of the body weight of crab seedlings.

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PUM

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Abstract

The invention relates to a culture method of aquatic products, in particular to a culture method of water crabs. The culture water quality of the culture method meets the water quality standard stated by fresh water aquaculture water quality. Natural crab fingerlings in sea area or artificial crab fingerlings reared according to the principle of organic aquiculture are selected, and mixed culture mode is adopted. The feedstuff uses live and fresh fauna and flora bait. Bed sediment is sterilized periodically during cultivation. Compared with existing culture method, the invention has the features of rapid growth speed, strong disease-resistant capability and so on; colony weight-gain rate is improved by 10 percent comparing with existing culture method; disease incidence rate reduces from 8 percent-10 percent to less than 4 percent. The invention has a remarkable economic benefit, and is a reliable technology support to increase the efficiency of fishery and the income of peasant in new period.

Description

Technical field: [0001] The invention relates to a method for cultivating aquatic products, in particular to a method for cultivating hairy crabs. Background technique: [0002] Hairy crab belongs to a kind of river crab. It grows fast, has a large size, and tastes delicious when eaten, and is deeply loved by people. In particular, hairy crab breeding in the Yellow River estuary has become an important way for local farmers to increase their income and become rich. With the development of hairy crab farming, there have also emerged some problems that need to be solved. Generally, crab farmers use experience to breed crabs. Ignoring the ecological and environmental problems of breeding, random use of antibiotics, hormones and other drugs, and the use of industrial mixed feeds have caused damage to the ecological environment in which hairy crabs live, resulting in a decline in quality, and also caused the spread of diseases and damaged the economic benefits of crab farming. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/00A23K1/18
CPCY02A40/81
Inventor 李怀章
Owner 李怀章
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