WIDYANINGTYAS KUSUMAWARDHANI. Different Stocking Densities of Nile Tilapia (Oreochromis niloticus) in Polyculture Systems on the Growth and Survival of Gourami (Osphronemus gouramy) (Supervised by MOCHAMAD SYAIFUDIN). Polyculture is a cultivation system of more than one type of fish in one cultivation environment to optimize the use of feed, water and land. The purpose and use of this study wer…