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Shrimp Aquaculture Case Studies

Case Study #1

Shrimp Farming: Decrease in Streptococcus, Pseudomonas, and Aeromonas in Separate Tank Systems at a Shrimp Hatchery
Client: El Rosario Hatchery
Location: Brazil
Objective: Decrease various bacteria in aquaculture environment
Result: After two weeks of treatment, all Hemolytic Streptococci, Pseudomonas, and Aeromonas levels were reduced to zero, drastically improving the shrimp aquaculture environment.
Research company:

A commercial recirculation shrimp hatchery was experiencing severe mortalities due to infection. Lymnozyme® was applied to separate tank systems at the same dosing rate of 30 ml per 3728 liters of system volume for one treatment every three days for nine days, then once per week at 20 ml per 3728 liters of system volume until the infection subsided at the end of the study.
• Experiment I*: Hemolytic Streptococci was mitigated by using Lymnozyme®.
• Experiment II*: Streptococcus, Pseudomonas, and Aeromonas sp. Pathogens were decreased following treatment with Lymnozyme®.

* All analytical microbiological tests were carried out by a certified laboratory.

Case Study #2

Shrimp Farming: Reduction of Vibrio Pathogens
Client: Estrada Shrimp Farms
Location: Guayaquil, Ecuador
Objective: Reduction of Vibrio Pathogens in Shrimp Aquaculture Ponds
Result: 4900 CFU/ml of Vibrio Pathogens was reduced to an average of 10-200 CFU/ml
Research company: Modercorp

Reduction of Vibrio pathogens in shrimp pond treated with Lymnozyme®

Case Study #3

Tilapia and Shrimp Farming: Tilapia and Shrimp Polyculture
Client: ModercorpAquaculture
Location: Ecuador
Objective: Reduce various bacterial outbreaks in polyculture, especially during the cold season in Ecuador
Result:
Shrimp:

  • ~ 55.0% higher final harvest weight
  • ~ 21.9% higher average shrimp weight at harvest
  • ~ 9.0 % higher survival rate

Tilapia:

  • More than doubled total harvest weight
  • ~ 32.9% greater average weight gain per day
  • ~ 16.0% higher average harvest weight per fish
  • ~ 10.4% higher survival rate

Research company:

As seen in most typical polyculture aquaculture facilities, only the tilapia were fed a commercially prepared diet in this pond study and the shrimp received no commercial supplementation diet.

In shrimp farming, shrimp essentially survive on biological conversion of waste product. With the exception of the addition of WSR™ (Waste and Sludge Reducer) in pond 5P, all other grow-out conditions were the same between the two ponds, including the amount of aeration (6 HP / Hectare). The average dosage for WSR™ was 0.75 to 1.0 kg per hectare per week during the grow-out cycle. WSR™ was applied at 1.5 kg/Ha in week one as a shock treatment.

Partial shrimp harvests were conducted at intervals during the total tilapia production period of April through September and October. Their average weights and total harvest weights were recorded. Data for shrimp farming production were gathered from the same ponds 5P and 2P during the same growth cycle to determine if any improvements in growth could be indicated between WSR™ treatment and the untreated pond.

The use of specialized microbial formulas such as WSR™ presents a major increase in net revenues to the shrimp aquaculture operation and can significantly improve profits with a small initial investment. The use of WSR™ in marginal shrimp farming systems with poor water quality may improve yields enough to make these farms profitable.

Case Study #4

Shrimp farming: Sludge reduction
Client: Estrada Shrimp Farms
Location: Ecuador
Objective: Reduce the amount of sludge in ponds
Result: Pond sludge depth reduced from 6 inches to zero. The reduction in sludge also allowed the farmed shrimp to be harvested four weeks earlier than usual.
Research company:

A shrimp farming operation in Ecuador was experiencing high sludge buildup on the bottom of their intensive grow-out ponds. The grow-out cycle for the WSR™ treated pond was 17 weeks. After harvest, the ponds were drained and photographs were taken as side-by-side comparisons. The depth of the sludge was measured in the treated and non-treated WSR™ ponds. Dosage was 1 kg WSR™ per hectare per week for 17 weeks in the treated pond. It was noted that the farmed shrimp were ready for harvest at 16 weeks. The pond sludge depth was dramatically reduced when the WSR™ was administered. The treated pond bottom sludge depth was also reduced. The use of WSR™ permitted a shorter production period: WSR™ allowed a harvest at 17 weeks instead of the 21 weeks normally needed for grow-out.

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