Thermal performance of juvenile Atlantic salmon (Salmo salar L.) of Baltic Sea origin

1. The effect of temperature on food intake, growth and energetic growth efficiency of Atlantic salmon of Baltic Sea origin was studied in tanks.2. Energetic growth efficiency, optimum temperature for growth and thermal limits for feeding and growth were similar to those reported for Atlantic salmon populations from Norway.3. The maximum growth capacity of Baltic salmon in this study was, however, considerably higher than those reported for Atlantic populations from Norway.4. The comparably higher growth capacity of Baltic salmon might be an adaptation to local factors or due to genotypic difference between Baltic and Atlantic salmon.