Prebiotic effect of different levels of the cell wall of the yeast Saccharomyces cerevisiae on growth, survival, Open retardation and blood indices of rainbow trout (Oncorhynchus mykiss)

This study was conducted to evaluate the effect of prebiotic short Saccharomyces cerevisiae yeast cell wall (YCW) on growth، nutrition and survival rates، blood indices of rainbow trout (Oncorhynchus mykiss) were studied. 600 pieces of salmon with an average weight of (1 ± 20) g 4 treatments and 3 replications (each replication 50 pieces of fish) groups. Treatments 1، 2، 3 and 4، respectively، with diets containing 0، 0. 5، 1. 5 and 2. 5 grams of prebiotic cell wall of the yeast Saccharomyces cerevisiae were fed for 60 days. The results showed that the body weight of rainbow trout in the control treatment (treatment 1)، treatment 2، treatment 3 and treatment 4، respectively، 48. 70± 0. 3، 60. 50 ± 0. 30، 40. 52 ±0. 20، 30. 52 ± 0. 15 g. Highest level BW 60 day breeding period was observed in treatment 3 was significantly higher than the control treatment (P <0. 05). But with treatment، 2. 5 gram difference was not significant (P> 0. 05). Rainbow trout body length in control treatment (treatment 1)، treatment 2، treatment 3 and treatment 4، respectively، 1. 16 ± 0. 05، 16. 4 ± 0. 03، 16. 8 ± 0. 03، 16. 7 ± 0. 05 cm، so that the period of different doses of 0. 5، 1. 5 and 2. 5 grams of prebiotic cell wall of the yeast Saccharomyces cerevisiae significant differences between treatment and control treatments، 0. 5، 1. 5 and 2. 5 g per kg of feed for farmed fish were observed during the impact (P <0. 05) and treated only between 1. 5 and 2. 5 gram difference was not significant (P>0. 05). Add the yeast Saccharomyces cerevisiae cell wall is prebiotic to the diet of fish fingerling rainbow trout، has no effect on increasing survival rates. In this study the prebiotic cell wall of the yeast Saccharomyces cerevisiae، though the blood contains red blood cells (RBC)، hematocrit (HCT)، had no effect (P>0. 05)، but hemoglobin، RBC indices trout samples Rainbow treatments tested in this study، there was no significant difference (P <0. 05). All treatments were well fed with prebiotic growth in the cell wall of the yeast Saccharomyces cerevisiae were significantly different from the control (P <0. 05) and improve these indicators were compared to the control treatment.