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Author Bright Singh, I. S. ♦ Sajeevan, T. P. ♦ Rosamma, Philip
Source CUSAT-Thesis
Content type Text
Publisher ELSEVIER
File Format PDF
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Chemistry & allied sciences ♦ Technology
Subject Keyword Fenneropenaeus indicus ♦ Candida sake ♦ Glucan ♦ Immunostimulant ♦ Dose ♦ Frequency ♦ Survival
Abstract The immunostimulatory effect of an alkali insoluble glucan extracted from marine yeast isolate Candida sakeS165 was tested in Fenneropenaeus indicus. Post larvae (PL) of F. indicus, fed glucan incorporated diet atvarying concentrations (0.05, 0.1, 0.2, 0.3, 0.4 g glucan/100 g feed) for 21 days were challenged orally withwhite spot syndrome virus (WSSV). Maximum survival was observed in PL fed the 0.2% glucan incorporateddiet. Subsequently the feed incorporated with 0.2% glucan was fed to F. indicus post larvae at differentfeeding intervals, i.e. daily, once every two days, once every five days, once every seven days and once everyten days. After 40 days, the prawns were challenged orally with WSSV and post challenge survival wasrecorded. Shrimp feed containing 0.2% glucan when administered once every seven days gave maximumsurvival. This was supported by haematological data obtained from adult F. indicus, i.e. total haemocyte count,phenoloxidase activity and nitroblue tetrazolium reduction (NBT). The present observation confirms theimportance of dose and frequency of administration of immunostimulants in shrimp health management
Education Level UG and PG
Learning Resource Type Article