Effects of dietary Nucleotides on the immune response and growth of Juvenile Pacific White Shrimp Litopenaeus vannamei (Boone, 1931)
2012
Andrino, Karen Grace S. | Serrano, Augusto E. | Corre, Valeriano L.
Effects of dietary supplementation of nucleotides on immune response, survival against white spot syndrome virus (WSSV) challenge infection and growth of Pacific white shrimp Litopenaeus vannamei (Boone, 1931) juveniles were evaluated. The basal diet for Pacific white shrimp supplemented with nucleotide formula (Vannagen; Chemoforma, Augst, Switzerland) at 0%, 0.2%, 0.4% and 0.6% kg¯¹ of feed were tested. Survival ofshrimp was in the range of 92-97% and was not significantly different among treatments. However, specific growthrate (SGR), feed conversion efficiency (FCE) and protein productive value (PPV) were significantly better inshrimps fed the nucleotide-supplemented diet than those fed the control diet after a 60-day feeding trial. Survival oftest animals upon challenge with WSSV infection was significantly higher in the nucleotide group than in the control group. Immune response indices i.e. total haemocyte count (THC), respiratory burst activity and phenoloxidase activity were significantly enhanced in shrimp fed diets containing nucleotides as compared to those fed diets with no supplementation. At the levels tested, 0.2% nucleotide in the diet was the optimum. These resultsindicate that dietary supplementation of nucleotides resulted in beneficial effects in improving growth, feed utilisation, protein utilisation and accelerate shrimp immune response against WSSV infection.
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