“…In a recent study on adult 1.6-kg Atlantic salmon reared at 13, 15, 17 or 19°C, we showed that circulating plasma IGF-1 was not affected by temperature while growth and feed intake was reduced along with muscle igf1 at elevated temperatures . Similarly, adult 2.0-kg Atlantic salmon reared at elevated temperature (19°C) for 56 days, had reduced muscle igf1 mRNA when compared to the 14°C control group (Hevrøy et al, 2012). The same responses have been observed in juvenile southern flounder (Paralichthys lethostigma) reared at 23°C and 28°C with reduced food consumption, feed utilizations, growth, plasma IGF-1 and muscle igf1 mRNA at 28°C, which was regarded as a temperature above the optimum for growth .…”