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Aquaculture results-Shrimp

Aquaculture results-Shrimp
1562

3 / Mar

Aquaculture results-Shrimp

During the culture of the larval stage of marine fish, live feed (such as: rotifer, copepoda, brine shrimp) is fundamental. The main purpose of this research was to investigate the effectiveness of chlorine dioxide in sterilizing the live feed and fertilized eggs of orange-spotted grouper (Epinephelus coioides). Chlorine dioxide was found to inhibit bacterial growth and increase the survival rate of live feed, at the same time increasing the hatching rate of orange-spotted grouper. In addition, Nervous Necrosis Virus (NNV) - IgY(Immunoglobulin Yolk), used to enrich live feed, acted as a passive immunization to viruses, so increasing the survival rate of grouper larvae.

Different concentrations of chlorine dioxide were used to sterilize live feed and fertilized eggs; results showed that a 10 minutes’ immersion bath at a concentration of 4 ppm was effective and did not result in harm to live feed. Similarly, a concentration of 2 ppm resulted in significant depletion of bacteria without affecting the hatching rate of the fertilized eggs.

Grouper larvae fed with sterilized, NNV-IgY-enrichment live feed, (the experimental group) survived at a rate of 5.79 %, while the control group (the feed of which was not enriched with NNV-IgY) survived at a rate of 4.36 %. Grouper larvae were challenged with a single dose of NNV pathogen, injected into the abdominal cavity. Survival rates were significantly higher in the experimental group than in the control group.

 

Whiteleg shrimp

A.Philippine

Customer,feedback in Cebu,Philippine
Normal
With U-pro
DOC
90 days
90 days
Stocking Density
40-150 pcs/m2
150 pcs/m2
Length of Shrimp
13-14 cm
15-16 cm
Each Shrimp Weight
18 g
30 g

 

B.Thailand

Customer feedback in Thailand
With U-pro
DOC
64 days
Stocking Number
70000 pcs
Stocking Density
45 pcs/m2
Total Harvest Weight
700 kg→950 kg
Feed Conversion Ratio 1.089
Survival Rate 97.9 %