Effect of diet composition and protein level on growth, body composition, haematological characteristics and cost of production of rainbow trout (Salmo gairdneri)

TitleEffect of diet composition and protein level on growth, body composition, haematological characteristics and cost of production of rainbow trout (Salmo gairdneri)
Publication TypeJournal Article
Year of Publication1986
AuthorsAlexis, MN, Theochari V, Papaparaskeva-Papoutsoglou E
JournalAquaculture
Volume58
Issue1-2
Pages75 - 85
Abstract

Rainbow trout of approximately 1 g initial average weight were fed eight experimental diets and a commercial diet for 196 days. Four different combinations of by-products were used as the main ingredient in formulating four pairs of diets differing in their protein content (40 and 49%). The response of the fish towards the protein increase in the diet was not uniform, a better performance being observed for two of the mixtures used at the higher protein content and a worse performance for the other two. The growth of the fish was negatively correlated with the carob seed germ meal content of the diet. The differences in the protein content of the fish fed the experimental diets were small while the lipid content was more variable. A large proportion of the body lipids was contributed by the visceral lipids. Haematological characteristics of all of the fish tested were within the normal values reported in the literature. © 1986.

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