Oregano Gregarine control with DOSTO® oregano oil in commercial shrimp earth ponds
by Fabián Jijón, Global Species Manager Aquaculture and International Sales Manager in LATAM, Dostofarm GmbH and Francisca Veinat G, Product Manager, Dostofarm GmbH
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method. Important here is a consistent quality of the essential oil regarines are common gut parasites in order to achieve a constant effect at the recommended dosage. that affects shrimp populations around the world. This parasite can affect shrimp in any of its life cycle Origin of oregano oil stage. Some of the negative effects In a commercial shrimp operation in Ecuador with a recurring of the gregarine presence in shrimp gregarine problem was tested the potential of DOSTO® aquaculture are low daily weight Concentrate 500 to control the infection. DOSTO® Concentrate gain and high feed intake, leading 500, contains 50 percent oregano oil from a specific subspecies to a high FCR, and secondary of Origanum vulgare var. hirtum. After harvesting, the essential bacterial infections (Vibrio spp.). Earth ponds, which are the most oregano oil is extracted from the plant by gentle steam widespread building practice for commercial shrimp operations, distillation. living vectors (ie clams), low pond soil bottom management, The content of phytochemicals in the essential oil is determined high feeding rates or low feed quality are some of the factors after each production in order to ensure a consistent standardised that increase the risk of having Gregarines present in shrimp composition. Oregano oil can be used in all livestock and aquaculture systems. aquaculture species both conventional and organic production Feed additives have been used for years to support systems. performance and animal health. The positive effects of essential oils are well-known from Table 1. Gregarine evaluation Table 2. Gregarine count before and after feeding human medicine and can also contribute to scale DOSTO® Concentrate 500 increase performance and health in livestock Level Organisms Mid Gut Hindgut and aquaculture. Essential oregano oil per visual Pond Before After Before After is characterised by its antimicrobial and G1 1-5 1 2 1 3 1-2 antiparasitic properties. The effectiveness G2 6-10 2 3 1 3 2 depends on the chemical composition of the G3 >20 3 2 1 3 1 oregano oil. This is influenced by the origin, plant species, growth stage and processing 34 | June 2020 - International Aquafeed