Survival and growth of sea trout parr in fresh and brackish water

There was no difference in survival or growth rate over 63 days for young-o f-the-year sea trout Salmo trutta in Fresh and brackish Baltic Sea water (6 .7 psu). Hence, such sea trout parr that migrate from the freshwater habita t in which they hatch to the Baltic coastal zone, without smelting, should experience little or no physiological cost in survival and growth. (C) 2001 The Fisheries Society of the British Isles.