Description:at 132 fish/m? and three replicates each at 66 and 33 fish/m3. Water chemistry and .. recirculating aquaculture system effluents from well established culture systems. Tilapia 217 1 07 Otte & Rosenthal. 1979. Channel Trichopterus, To Infectious Pancreatic Necrosis (IPN) Virus". Life Sciences,.