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Subject: Aquaculture × Author: MADHUSUDAN, B. M., × End date: 2019 × Start date: 2017 × Thesis Type: M.F.Sc ×
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    ThesisItemOpen Access
    EFFECT OF POLYHERBAL COMPONENTS ON GROWTH, SURVIVAL, IMMUNE RESPONSE AND DISEASE RESISTANCE IN WHITE LEG SHRIMP Litopenaeus vannamei
    (KARNATAKA VETERINARY, ANIMAL AND FISHERIES SCIENCES UNIVERSITY, BIDAR., 2019) MADHUSUDAN, B. M.,; Dr. H Shivananda Murthy)
    effect of polyherbal components on growth, survival, immune response and disease resistance in white leg shrimp Litopenaeus vannamei was assessed in indoor circulatory aquaculture system, which was tested for 60 days. For this study, 0.5 g/kg feed vitamin C (G1), 1.5 g/kg feed vit C (G2), 0.5 g/kg vit C and 1 g/kg polyherbal components (PHC)(G3), 0.5 g/kg each vit C and PHC (G4), 1 g/kg vit C and 0.5 g/kg PHC (G5) and 0.75 g/kg each vitamin C and PHC g/kg of feed (G6), supplemented diets were prepared and fed to shrimp. The growth performance of shrimp was assessed during the 15th, 30th, 45th and 60th days of feeding experiment. It showed that shrimp fed on G6 diet ex better growth performance such as SGR (0.55 ± 0.003%), the mean weight gain (18.70 ± 1.05g) and food conversion ratio (1.7 ± 0.0002) during the 60th day of feeding experiment, where highest survival was seen in G6 (86.66%). Immunological parameters such as total haemocyte count (284.0 × 105 cells/ml), superoxide anion activity (0.310 ± 0.02 O.D), phenoloxidase activity (0.15 ± 0.0002 O.D) were higher in shrimp fed diet G6 at the end of 60th day of feeding experiment. G6 group showed 60% survival when treatment diet fed shrimps were challenged against WSSV, while control diet fed shrimps had total mortality. The result inferred that the polyherbal components and vitamin C in combination at a concentration of 0.75 g/kg feed served as a potent growth promoter and immune modulator in shrimp, L. vannamei.