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Method for culturing anti-vibriosis epinephelus lanceolatus fry

A technology of saddle grouper and cultivation method, which is applied in fish farming, application, climate change adaptation, etc., and can solve problems such as easy abrasion of farmed fish, economic loss of fish farmers, high stocking density, etc.

Inactive Publication Date: 2005-09-07
庄余谋 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cage culture mode of saddle grouper will be caused by the high stocking density of the fish, the fast flow rate in the culture sea area, the cultured fish are easy to scratch, and there are problems such as poor disease resistance of the fish species, lack of rationality of feed nutrition or water quality in the culture water area. , can cause the outbreak of vibriosis, cause breeding failure and cause serious economic losses to fish farmers

Method used

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  • Method for culturing anti-vibriosis epinephelus lanceolatus fry
  • Method for culturing anti-vibriosis epinephelus lanceolatus fry
  • Method for culturing anti-vibriosis epinephelus lanceolatus fry

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Mix chlorine dioxide with water to a mass concentration of 4 mg / L, and then spray the whole pond to disinfect the nursery pond; remove the mucous membrane on the water surface in time after the larvae hatch out of the membrane, and use a 0.15-0.18mm pore size screen to perform micro-flow water exchange Compared with Guoli, the water exchange rate for larvae at the age of 4 to 10 days is 25% to 35% of the total water volume, the water exchange volume at the age of 11 to 20 days is 35% to 45% of the total water volume, and the water exchange volume at the age of 21 to 30 days is 50% of the total water volume. 45% to 100%, 30 to 40 days old, the water change volume is 100% to 200% of the total water volume; at the age of 7 to 15 days, the sewage is sucked once every 1 to 3 days, and after the age of 16 days, the sewage is sucked 1 to 2 times a day. Second, keep the pool water clean; the water temperature control range is 25-28°C, the salinity control range is 2.7%-3.1% by m...

Embodiment 2

[0034] According to embodiment 1 in the cultivation process, the fry survival rate and the fry that are divided into different periods are counted to the disease resistance rate of vibriosis, the results are as described in Table 1, and the number of fry of each batch is 100.

[0035] Experimental batch

[0036] Experiments show that, according to the technical scheme of the present invention, the survival rate of saddle grouper fry cultivation can be reached: the survival rate of 1-3 day-old fry cultivation is 76.4%-80.2%, the survival rate of 5-10 day-old fry cultivation is 68.1% ~72.3%, 50.2%~53.6% for 10~15 day old fry cultivation, and 42.7%~47.3% for 15~25 day old fry cultivation. The disease resistance rate to Vibrio was 65.2%-72.6%.

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Abstract

The invention relates to a breed method on anti-vibrio for girth rockfishes, characterized in that dipping in anti-vibrio bacterin twice on the day of 5-10 and 10-16 after fry's birth, whose molar concentration follows 1.0-2.0mg / L and 0.5-1.2mg / L, the time interval to dip in should be 5-8 days and the rotifer and brine shrimp in fry bait should be cultivated with enrichment in the water with chlorella of 30, 0000-50, 0000 cell number per milliliter and unsaturated fatty acid of W3 with molar concentration 0.03mg-0.06mg / L, whom should be fed to young fry after cultivating with enrichment 6-8h. The survival rate of the girth rockfish fry fed on this method, that 1-3 days age is 76.4%-80.2%, 5-10 days age is 68.1%-72.3%, 10-15 days age is 50.2%-53.6%, 15-25days age is 42.7%-47.3%, and the anti-vibrio rate can reach 65.2%-72.6%.

Description

technical field [0001] The invention relates to a method for cultivating grouper fry, in particular to a method for cultivating grouper fry resistant to vibriosis. Background technique [0002] Vibrio (Vibrio.sp) is one of the most common bacterial groups in the ocean. As a source of epidemic infection, it has become the most serious disease in mariculture and occurs widely around the world. Studies have shown that almost all marine fish are suffering from vibriosis. When vibriosis occurs seriously, the fish mortality rate is as high as 90%, which brings huge damage to aquaculture production. For a long time, the control of vibriosis in seawater cultured fish in my country has mainly relied on the use of various antibiotics and chemical drugs. The long-term and large-scale use of drugs has caused serious consequences that endanger human survival such as drug residues in aquatic products and ecological environment pollution. [0003] Saddle grouper (Epinephelus lanceolatus),...

Claims

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Application Information

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IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 庄余谋黎祖福庄杰贵
Owner 庄余谋
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