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Desalted breeding method of larval crab

A breeding method and mud crab technology, which can be used in fish farming, climate change adaptation, application, etc., and can solve problems such as the desalination farming method has not yet been established

Inactive Publication Date: 2007-09-26
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Scientific Fish Farming, 2005, 7:29; 3. Zhang Fuyun, Han Shihua, Yin Xuefu, etc. Cultivation Technology of Scylla serrata in Low-salinity Ponds in Northern Areas. China Aquaculture, 2005, 10:40-41), relatively complete desalination culture method not yet established

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Crabs that have been desalinated and cultivated and can adapt to a low-salt life with a salinity of 2 to 5 are selected as seedlings. The carapace of the seedlings is green, with neat specifications, complete bodies, sensitive responses and strong vitality. Place pottery pipes, brick tiles and cement pipes at the bottom of the deactivated shrimp ponds in the low-salinity estuary area as concealment. During the breeding period, the water temperature is controlled at 18-25°C, the pH is controlled at 7.8-8.0, the dissolved oxygen is above 5 mg / L, the ammonia nitrogen is below 0.1 mg / L, and the salinity is controlled at 2-8; the stocking density of blue crabs is 1800 / mu. Feed small miscellaneous fish, shrimp and shellfish. The daily feeding amount of small miscellaneous fish and shrimp is 10% to 12% of the body weight of the mud crab; the daily feeding amount of shellfish is 22% to 25% of the body weight of the mud crab. , fed 3 times a day, and fed 4 times a day in the m...

Embodiment 2

[0015] Similar to Example 1, the difference is that the seedlings are desalinated and cultivated and can adapt to low-salt life with a salinity of 6-10, and the crab ponds are selected from out-of-service fish ponds in low-salinity estuary areas. During the breeding period, the water temperature is controlled at 20-30°C, the pH is controlled at 8.0-8.5, and the salinity is controlled at 8-15; the stocking density of blue crabs is 1000 / mu. Feed small miscellaneous fish, shrimp and shellfish. The daily feeding amount of small miscellaneous fish and shrimp is 6% to 8% of the body weight of the mud crab; the daily feeding amount of shellfish is 25% to 30% of the body weight of the mud crab. During the breeding process, it is disinfected with quicklime every 15 days, and photosynthetic bacteria are sprinkled after 2 days of disinfection. If the water temperature exceeds 30 degrees, you can sprinkle live bacteria water purifier once to improve the bottom quality.

Embodiment 3

[0017] Similar to Example 1, the difference is that the crab seedlings are the 4th stage larvae, the salinity is desalinated to 10, which is the same as the salinity in the crab pond, and the salinity is kept constant during cultivation. The stocking density of crab seedlings is 1200 / mu. After 3 months of breeding, the survival rate of blue crabs is 61.9%, the average weight is 210g / only, and the yield per mu is 156Kg.

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PUM

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Abstract

A Scylla serrata cultivating method relates to a low-salt-density Scylla serrata cultivation in fresh water. The invention comprises that Scylla serrata seed can be used in 2-10 low-salinity, the Scylla serrata pool can contain hidden material in pool to increase the hidden and move space of Scylla serrata to disperse Scylla serrata and reduce meet accidence, thereby improving cultivation survival rate, and the water is 18-30Deg. C and 2-15 salinity in cultivation, the Scylla serrata cultivating density is 300-1800n in each acre, the forge is fish and shellfish to be fed 2-4 times in each day. The invention can improve survival rate and reduce cost.

Description

technical field [0001] The invention relates to an aquaculture method, in particular to a method for cultivating mud crabs in low-salinity waters. Background technique [0002] The blue crab has the advantages of large size, fast growth, delicious meat and rich nutrition, and is a famous marine crab. Studies have shown that blue crabs have strong low-salt tolerance, and can still grow normally when the salinity is 2 (Liu Chunling, Hu Fang. Desalination breeding experiment of blue crabs. Scientific Fish Culture, 2005, 7: 29). The desalination culture of blue crab has important significance: ①Expand the new territory of blue crab culture, make full use of many low-salinity waters in the estuary area, and further increase the yield and benefit of crab culture. ② It avoids the intrusion of seawater diseases on the breeding of blue crabs. ③The risks of typhoons and red tides are reduced. ④ Sea crab desalination farming is a major innovation in crab farming technology. In addi...

Claims

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Application Information

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IPC IPC(8): A01K61/00A01K61/59
CPCY02A40/81
Inventor 叶海辉王桂忠林琼武李少菁
Owner XIAMEN UNIV
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