Pakistan J. Zool., vol. 47(3), pp. 625-633, 2015. The Effects of Salinity, Temperature and Feed Ratio on Growth Performance of European Sea Bass (Dicentrarchus labrax L., 1758) in the Water Obtained Through Reverse Osmosis System and a Natural River Ertan Ercan,* Neslihan Ağralı and Ali Serhan Tarkan