Abstract

There has been a tremendous growth of the Norwegian fish farming industry from a production of 7,500 tons of Atlantic salmon (Salmo salar) and rainbow trout (Salmo gairdneri) in 1980 to a production of about 90,000 tonnes (mostly salmon) in 1988. The great economic value of this production has also led to interest in any toxic substance that could possibly reduce fish growth and/or impair fish health. In this study the concentration of cadmium in four commercial feeds for salmon fry and the cadmium concentration in the growing fry fed these diets were studied.

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