ABSTRACT Koto Panjang Reservoir was built in early 1993 with the main purpose as a hydroelectric power plant (PLTA). The reservoir area of around 12,400 Ha is widely used for various other purposes, including flood control, transportation, tourism and fisheries. The fisheries business that is quite developed in the Koto Panjang Reservoir is fish farming in floating net cages (KJA). The uti…