The 138-day growth study was performed with triplicate
groups of Atlantic salmon of 1.0 and 2.5 kg initial weight.
Irrespective of size; growth, feed conversion ratio (FCR),
nitrogen and energy retention were poorer in fish fed the diet with
DP/DE ratio of 14.1 g MJ–1 compared with the fish fed the other
diets. A DP/DE ratio of 16.4 g MJ–1 was sufficient to produce
maximum growth for the large fish, while the DP/DE ratio of
18.8 g MJ–1 produced the highest growth in the small fish. In the
large fish, the lowest FCR was obtained on a DP/DE ratio of 16.4
g MJ–1, while there was no clear difference in FCR within the small
fish when diets of DP/DE ratios of 16.4–21.9 g MJ–1 were fed.