The effectiveness of methanol extract and fractinations fromleaves of mangroveSonneratia albaand Bruguiera gymnorrhizafor the prevention of white spot syndrome virus (WSSV) infection in black tiger shrimp Penaeus monodon - Muliani, Muliani,; Research Institute for Coastal Aquaculture and Fisheries Extension (BPPBAP Maros) (ISSA, 2018)