Payame Noor University Experimental animal Biology 2322-2387 5 3 2017 02 19 Effect of different level of Lactobacillus acidophilus on growth performance, hematological parameters and intestinal microbiota in Poecilia reticulata Effect of different level of Lactobacillus acidophilus on growth performance, hematological parameters and intestinal microbiota in Poecilia reticulata 51 59 3490 FA Farid Firouzbakhsh Associated Professor, Department of Fisheries, Faculty of Animal Sciences and Fisheries, Sari Agricultural Sciences and Natural Resources University, Sari, Iran Farzaneh Vakili Sekineh Yeganeh Journal Article 2017 03 08 The present study was performed to investigate the effects of various levels of dietary <em>lactobacillus acidophilus</em> as feed supplement on the growth performance, survival rate, hematological parameters and intestinal microbiota of guppy (<em>Poecilia reticulata</em>). For this purpose one-thousand and eight hundred guppy larvae with 7 mg mean weight in a completely randomized design with 4 treatments and 3 replicates of <em>L. acidophilus</em> in the diet, including no bacteria (control), 1.5×10⁷, 3×10⁷, 6×10⁷ CFU g^-1(T₂,T₃,T₄ respectively) were considered and fed for 16 weeks. The results showed that significant differences (P4 and control group. The highest amount of white blood cell count (9.70±0.1) was observed in 4 group and had significant different (P>0.05) with control (5.96±0.2). The highest amount of intestinal of <em>Lactobacillus</em> was observed in 4 group compared to other groups and control (PL. acidophilus (6×10⁷ CFU g^-1) have significant effect on growth and white blood cell count of guppy. <br />  The present study was performed to investigate the effects of various levels of dietary <em>lactobacillus acidophilus</em> as feed supplement on the growth performance, survival rate, hematological parameters and intestinal microbiota of guppy (<em>Poecilia reticulata</em>). For this purpose one-thousand and eight hundred guppy larvae with 7 mg mean weight in a completely randomized design with 4 treatments and 3 replicates of <em>L. acidophilus</em> in the diet, including no bacteria (control), 1.5×10⁷, 3×10⁷, 6×10⁷ CFU g^-1(T₂,T₃,T₄ respectively) were considered and fed for 16 weeks. The results showed that significant differences (P4 and control group. The highest amount of white blood cell count (9.70±0.1) was observed in 4 group and had significant different (P>0.05) with control (5.96±0.2). The highest amount of intestinal of <em>Lactobacillus</em> was observed in 4 group compared to other groups and control (PL. acidophilus (6×10⁷ CFU g^-1) have significant effect on growth and white blood cell count of guppy. <br />  https://eab.journals.pnu.ac.ir/article_3490_cf0ea32692207f7cd555567332e0c7da.pdf