The efficacy of GarVit Aqua on white leg shrimp performances in Vietnam
Type of trial: Field trial
Location of trial: Aquaculture farm in Vietnam
Trial period: From day 15 to 140 of shrimp’s life cycle
Experimented animals: 250,000 post-larvae white leg shrimps
Trial aim: To assess the efficacy of GarVit Aqua as a performance enhancer for shrimps.
Aquaculture farmers in Vietnam have traditionally used garlic to protect the intestinal tract of shrimps.
Knowing that XVET’s GarVit Aqua contains not only garlic oil but various performance supportive ingredients, a trial was performed to evaluate the efficacy of GarVit Aqua on shrimps performance and resistance to diseases.
Material and methods:
A total of 250,000 white leg post-larvae shrimps were used for the trial.
Total pond area: 2,500m2
Administration of the product:
GarVit Aqua was administered as 5 ml per kg feed one time a day, starting from day 15th onwards.
After 25 days, shrimp will be divided into 2 ponds.
Pond A (1,500m2) will be the control group (not use GarVit Aqua).
Pond B (1000m2) will continue to use GarVit Aqua.
The rearing period will be 140 days.
After 25 days of using GarVit Aqua and before dividing in two groups, the farmer evaluated that the shrimps grew well and did not suffer from any diseases (ex: white feces syndrome) which is a common disease. Even though the trial was supposed to be done with having a control and treatment group, the farmer decided to change the original planning of the trial and use GarVit Aqua for both ponds, eliminating with this the control group as shown in figure 1.
After 140 days, the following parameters were recorded:
· Survival rate: 90%
· Feed conversion ratio: 1.52
· Shrimp size: 28 shrimps/kg
· Survival rate: 92%
· Feed conversion ratio: 1.50
· Shrimp size: 26 shrimps/kg
Although both ponds used GarVit Aqua, the environment of pond B was cleaner than pond A. Therefore, the shrimp on pond B grew better.
Having as an aim to compare the efficacy of this product in comparison to not using it, historical data was used for the assessment.
Previous litter reared for only 90 days.
• The Survival rate: 89% which is less than both pond A and B.
• The shrimp size was 35 shrimps per kg showing smaller shrimps in comparison with Pond A and B.
• The feed conversion ratio was 1.53 which is higher that both Pond A and B.
Although the original trial plan wasn’t continued during the complete rearing period, a historical value and observation was used to compare the production parameters.
Due to the fact that the two litters were not reared the same amount of days the only parameter that can be compared is the survival rate.
The previous litter presented a survival rate of 89% with only 90 days and the GarVit Aqua litters presented a survival rate between 90-92% being this a much higher survival rate even with a 50 days longer rearing period.
The observations of the trial farm provided good feedback explaining how they experience a proper growth of the animals and with less disease than they would usually have in their production such as white feces syndrome.
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