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      Efecto de la inulina y del ácido fúlvico en la supervivencia, crecimiento, sistema inmune y prevalencia de WSSV en Litopenaeus vannamei Translated title: Effect of inulin and fulvic acid on survival, growth, immune system, and WSSV prevalence in Litopenaeus vannamei

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          Abstract

          Se estudió el efecto del prebiótico inulina y ácido fúlvico, adicionados en el alimento, sobre el crecimiento, supervivencia, prevalencia de WSSV y sistema inmune de Litopenaeus vannamei. Para esto, se realizó un bioensayo, con tratamientos por triplicado, donde se probaron diferentes concentraciones de los aditivos. Se hizo un análisis de WSSV en organismos infectados con una carga viral relativamente alta utilizando la PCR sencilla y anidada. Al final del bioensayo se extrajo la hemolinfa y se estudió el sistema inmune en hemocitos a nivel bioquímico y genético (PCR cuantitativo). El peso final fue similar en todos los tratamientos y la supervivencia estuvo entre 66,7% y 93,3%. La prevalencia de WSSV disminuyó un 13% respecto al control. El número de hemocitos, la actividad de la fenoloxidasa y la concentración de anión superóxido fueron similares en todos los tratamientos. Los aditivos modularon la expresión de los genes transglutaminasa, superóxido dismutasa y profenoloxidasa, pero no la del receptor Toll. Los aditivos no afectan negativamente el crecimiento y protegen al camarón contra WSSV en organismos infectados con una carga viral relativamente alta. No se observó efecto de los aditivos en los efectores del sistema inmune estudiados a nivel bioquímico pero si modularon la expresión de algunos genes relacionados con el sistema inmune en L. vannamei.

          Translated abstract

          The effect of inulin and fulvic acid, added in the feed, on growth, survival, WSSV prevalence, and immune system was studied in Litopenaeus vannamei. To the above, a bioassay, with treatments in triplicate, was performed to test different additive concentrations. WSSV analysis was done in organisms infected with a relatively high viral load using single and nested PCR. At the end of the bioassay, hemolymph was extracted and the immune system was studied in hemocytes at biochemical and genetic level (quantitative PCR). The final growth was similar in all treatments and survival was between 66,7% and 93,3%. WSSV prevalence decreased 13% as compared to control. The number of hemocytes, phenoloxidase activity, and superoxide anion concentration were similar in all treatments. Inulin and fulvic acid modulated the expression of transglutaminase, superoxide dismutase, and prophenoloxidase genes, but not the Toll receptor. Additives do not negatively affect growth of white shrimp and they protect them against WSSV when infected with a relatively high viral load. Additives did not affect the immune system effectors studied at biochemical level but they modulated the expression of some immune-related genes in L. vannamei.

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          Detection of baculovirus associated with white spot syndrome (WSBV) in penaeid shrimps using polymerase chain reaction

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            Immunostimulation of tiger shrimp (Penaeus monodon) hemocytes for generation of microbicidal substances: Analysis of reactive oxygen species

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              Virus diseases of farmed shrimp in the Western Hemisphere (the Americas): A review

              Penaeid shrimp aquaculture is an important industry in the Americas, and the industry is based almost entirely on the culture of the Pacific White Shrimp, Litopenaeus vannamei. Western Hemisphere shrimp farmers in 14 countries in 2004 produced more than 200,000 metric tons of shrimp, generated more than $2 billion in revenue, and employed more than 500,000 people. Disease has had a major impact on shrimp aquaculture in the Americas since it became a significant commercial entity in the 1970s. Diseases due to viruses, rickettsial-like bacteria, true bacteria, protozoa, and fungi have emerged as major diseases of farmed shrimp in the region. Many of the bacterial, fungal and protozoan caused diseases are managed using improved culture practices, routine sanitation, and the use of chemotherapeutics. However, the virus diseases have been far more problematic to manage and they have been responsible for the most costly epizootics. Examples include the Taura syndrome pandemic that began in 1991–1992 when the disease emerged in Ecuador, and the subsequent White Spot Disease pandemic that followed its introduction to Central America from Asia in 1999. Because of their socioeconomic significance to shrimp farming, seven of the nine crustacean diseases listed by the World Animal Organization (OIE) are virus diseases of shrimp. Of the seven virus diseases of penaeid shrimp, five are native to the Americas or have become enzootic following their introduction. The shrimp virus diseases in the Americas are increasingly being managed by exclusion using a combination of biosecurity and the practice of culturing domesticated specific pathogen-free (SPF) stocks or specific pathogen-resistant (SPR) stocks. Despite the significant challenges posed by disease, the shrimp farming industry of the Americas has responded to the challenges posed by disease and it has developed methods to manage its diseases and mature into a sustainable industry.
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
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                Journal
                lajar
                Latin american journal of aquatic research
                Lat. Am. J. Aquat. Res.
                Pontificia Universidad Católica de Valparaíso<BR>Facultad de Recursos Naturales<BR>Escuela de Ciencias del Mar (Valparaíso )
                0718-560X
                November 2015
                : 43
                : 5
                : 912-921
                Affiliations
                [1 ] Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional México
                Article
                S0718-560X2015000500011
                10.3856/vol43-issue5-fulltext-11
                ff409768-1f32-49fa-9b2b-2aa93c21f8e9

                http://creativecommons.org/licenses/by/4.0/

                History
                Product

                SciELO Chile

                Self URI (journal page): http://www.scielo.cl/scielo.php?script=sci_serial&pid=0718-560X&lng=en
                Categories
                FISHERIES
                MARINE & FRESHWATER BIOLOGY
                OCEANOGRAPHY

                Oceanography & Hydrology,Aquaculture & Fisheries,Ecology
                immune system,Litopenaeus vannamei,inulina,ácido fúlvico,sistema inmune,prebiótico,acuicultura,inulin,fulvic acid,prebiotic,aquaculture

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