Those interested in the design and manufacture of feeds for intensive fish
farming face the basic concern of formulating mixtures for the best yield a
t the lowest costs. Of the macronutrients in the feed, protein has and cont
inues to receive special consideration because fish present high and specif
ic needs for this constituent. Traditionally, protein has been supplied pri
marily by fish meals. This paper presents a synthesis of the efforts made a
nd the lines explored to achieve an effective reduction of the amount of fi
sh meal in the feeds for fish, following two strategies: reduction of the p
rotein in the feeds and the use of new raw materials to replace fish meal.