The Ph.D. viva session will be held in the auditorium of the Iranian Fisheries Science and Research Institute for Ms. Maryam Nafari who is the research - based Ph.D. student. The title of her dissertation is "Determination of breeding goals and estimation of economic coefficients of traits in selective breeding of Caspian trout (Salmo trutta caspius)". The Ph.D. viva session will be held on Saturday, January 18, 2020, from 9:00 a.m. to 10:30 a.m. All researchers and interested people are invited to attend.