Vitamin E Improves Growth in Stressed Salmon
19 January 2012NORWAY - Following on from research that suggested that warmer seas reduce salmon's appetite and growth, scientists now say that more vitamin E in the diet can help prevent the stress and poor growth in farmed salmon.
Norwegian National Institute of Nutrition and Seafood Research (NIFES) scientist Ernst Hevrøy led a group of scientists on the project dicovering the effects of rising sea temperature on farmed salmon.
So far, Mr Hevrøy's research results have already led to the tailoring of sommerfôr for farmed salmon.
Mr Hevrøy and his research team have discovered that salmon mobilise a lot of vitamin E when the sea rises.
These research results have now led to the launch of a special food with more vitamin E. Feeding this diet prior to and during the summer months can reduce stress and growth problems.
Adult salmon can withstand high temperatures inferior to young salmon. In post-smolts sea temperature increases appear to have less negative effect on growth, said Mr Hevrøy.
Mr Hevrøy stated: "In the future we will also look at how trout can tolerate higher temperatures in comparison to salmon."
"If the trout appears to handle this better, one of the solutions to the future sea temperature rise would be to replace salmon farms with trout farms."
The knowledge of the project are based on trials carried out by the environmental laboratory at the Institute for Marine Aquaculture Station in Matre.
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