Distribution of α‐and γ‐tocopherols in Atlantic salmon (Salmo salar) tissues

Groups of Atlantic salmon parr (mean initial weight 9.5 g) were fed three diets, the first containing no tocopherol supplement, the others supplemented with either all‐rac‐α‐tocopherol (A‐T) or RRR‐γ‐tocopherol (G‐T). Tocopherol concentrations in the liver, serum, testes, kidney, brain, gill, muscle, and perivisceral fat were measured after 36 wk. Despite a higher dietary intake of G‐T, compared to A‐T, deposition of γ‐tocopherol (γT) was less efficient than of α‐tocopherol (αT) in most tissues except in the perivisceral fat, an adipose tissue. In fish fed the G‐T diet, the γT/αT ratio was highest in the perivisceral fat and lowest in the liver, indicating that the liver is the most discriminatory organ for retaining αT as compared to γT, and the perivisceral fat is more suitable for the storage of γT. A negative correlation (P