CAROTENOIDS IN FISH .20. CAROTENOIDS IN SALMO-GAIRDNERI RICH AND SALMO-TRUTTA-MORPHA-FARIO L

The author investigated the presence of various carotenoids in Salmo gairdneri Rich. and Salmo trutta morpha fario L. from the trout fish farm (artificial food) and from the river as the natural conditions (natural food). The findings of these investigations indicate that the trout bred in natural conditions are richer in carotenoids, provitamins of vitamin A, than are trout from the trout fish farm. In all probability the variety of food available in natural conditions provides better facilities for the accumulation of carotenoids in the body of trout in their natural habitat. © 1979 Dr. W. Junk b.v. Publishers.