Fig. 7. Concentration of vitamin D in the skin (ng/g wet weight) of vitamin Ddeficient
rainbow trout after they were irradiated in a solar light simulator.
Irradiation was for two periods of 30 min, 2 h apart. During the 2-h interval between
irradiations, the
fish was kept in darkness. Each point represents the mean
SD of
four
fish. A-1 and A-2 indicate the skin vitamin D content of trout irradiated with
full solar spectrum light. B-1 and B-2 indicate the skin vitamin D content of trout
irradiated with light over the wavelength range of 380–480 nm as illustrated in
Fig. 6.