Investigatiorr of stock and distribution of fishery resources was done in Toba Lake in October 2005, at the time when the wet season prevailed, using acoustic method. Split-beam echosounder SIMRAD Ey-60 operated at frequency ol iZO KHz and 0.512 ms pulse duration was used.
Wijopriono, W., Purnomo, K., Kartamihardja, E. S., & Fahmi, Z. (2017). FISHERY RESOURCES AND ECOLOGY OF TOBA LAKE. Indonesian Fisheries Research Journal, 16(1), 7. https://doi.org/10.15578/ifrj.16.1.2010.7-14