PERTUMBUHAN DAN KANDUNGAN PROTEIN BEBERAPA ISOLAT MARINE YEAST YANG DIISOLASI DARI PANTAI KABUPATEN GUNUNGKIDUL

Feed is a factor that has highest cost percentage in aquaculture. Cost percentage of feed can reach 60% from total production cost. The high price of feed requires alternative sources of feed ingredients that has appropriate protein content. Feed materials that have protein content more than 20 % can be used as protein source. Marine yeast is one of alternative for protein source and its can be used as single-cell protein. This research was to understand the growth and protein content of marine yeast. There was six marine yeast isolates KP2b, SP4a, KP2d, SD1a, KP3a, and SD1c used in this research. Growth of marine yeast isolates were observed using 600 nm wave length of spectrophotometer for five days in laboratory. Monitoring of protein content was done in day four and day five cultivation. The highest growth and cell density showed by KP2d that was 7,0 x 107 cell/ml. The highest biomass showed by SP4a that was 19,0 g/l. The highest protein content showed by SD1c that was 41,39%. It show that every isolates had different growth pattern and protein content