The effects of Saccharomyces cerevisiae and Mannan-Oligosaccharides based nutritional supplements on Levels of Glucose and Cortisol in Environmental stress and furunculosis in rainbow trout
Subject Areas : New Technologies in Aquaculture Development
1 - poultry, Aquatic and bee diseases department in iran veterinary organization and veterinarian (Aquatic Animal Health and Disease)
Keywords: Stress, Rainbow trout, prebiotics, Keywords: Environmental Stress, Furunculosis,
Abstract :
AbstractThe aim of this study is to investigate the effects of complementary rainbow trout diets with different concentrations of prebiotic, which contains active compounds of Saccharomyces cerevisiae with mannan-oligosaccharide (MOS) on environmental stress and resistance to furunculosis. Three levels of prebiotic (0, 0.1, 0.5 and 1 %) were mixed into pellets. Fish (19.08±1.45 gr) were fed a supplemented commercial diet for 60 days. On day 60 of study, environmental stress such as hypoxia, hyperthermia and induction of experimental diseases with furunculosis (Aeromonas salmonicida) were also performed for all the experimental groups. The blood glucose levels were determined using an enzymatic-based auto analyzer and used to measure cortisol using cortisol ELISA kit and ELISA method. The results of this study showed that different consntersin Celmanax have significantly effect on stress and cortisol and glucose levels (P<0.05). The results showed that rainbow trout resistance was increased with different concentrations level of Celmanax® and few fish were suffering to furunculosis (P<0.05). Based on these findings, it could be concluded that in order to decrease and enhance the streets and improve rainbow trout resistance, it is appropriate to add different concentrations level of Celmanax® prebiotic.
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