Abdolhamid Azari, R, H., G, A.T., SMV, F., M, D. and R, S. 2011. Effect of prebiotic (GroBiotic®-A) on the growth performance and intestinal microflora on rainbow trout (Oncorhynchus mykiss Walbaum). Journal of Research in Biology. 1, 5 (Sep. 2011), 325-334.