Characterization of Physiological, Morphological and Optimum Growth Rate of Saccharomyces Strains Isolated from Intestinal Flora of Domestic Rain Bow Trout Fish from Urmia City

Saccharomyces yeast genus has a wide application in biotechnology that several studies on this subject are performed. They have also known as a dietary supplement in breeding all kinds of creatures in particular for aquatics. Species of this genus are considered as probiotics, as well as a lot of beneficial effects on growth are creatures and Yeasts can be cultured in a variety of waste and cheap substrates, including hydrocarbons and petroleum. So finding an Appropriate and inexpensive culture media for optimal growth of yeast is important. In the present study, along with the study of Saccharomyces species diversity as intestinal flora of domestic rainbow trout flora, optimum growth conditions the strains of Saccharomyces cerevisiae was studied in different culture media as YPD, YPAD, YPG, YPAC, and DM. This research not only emphasized the diversity of Saccharomyces cerevisiae strains as an intestinal flora in domestic fishes, but also revealed the optimum growth of yeasts in YPAD media.