Abstract
Growth and survival were compared for first-feeding fry of Atlantic salmon (Salmo salar) fed a closed-formula commercial preparation, BioDiet, or U.S. Fish and Wildlife Service high nutrient density diets 398 or 406 for 14 weeks. Growth of fry fed BioDiet for 2, 3, 4, or 6 weeks from first feeding and then fed diet 406 for the rest of the 14-week study was also examined. Growth was fastest in fish fed exclusively diets 398 or 406 for 14 weeks, or BioDiet for 2 weeks followed by diet 406 for 12 weeks; survival was about 68, 82, and 92% respectively, for these three groups. These results indicate that in Atlantic salmon fry growth was most rapid and survival highest among fish fed BioDiet for the first 2 or 3 weeks followed by diet 406.

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