Jj. Olli et A. Krogdahl, NUTRITIVE-VALUE OF 4 SOYBEAN PRODUCTS AS PROTEIN-SOURCES IN DIETS FORRAINBOW-TROUT (ONCORHYNCHUS-MYKISS, WALBAUM) REARED IN FRESH-WATER, Acta agriculturae Scandinavica. Section A, Animal science, 44(3), 1994, pp. 185-192
Several soybean products were evaluated as protein sources for rainbow
trout reared in fresh water: solvent-extracted soybean meal (SBM44),
dehulled and solvent-extracted soybean meal (SBM50), dehulled full-fat
soybean meal (FFSBM) and soybean concentrate (SBC). The soybean produ
cts replaced high-quality fish meal at levels corresponding to 0, 14,
28, 42 and 56% soybean protein of total protein. Effects of inclusion
of soybean products were evaluated using regression analysis. SBC and
SBM50 did not affect weight gain significantly (p < 0.05), while SBM44
and FFSBM caused significant growth reduction. SBM44 was the only soy
bean product which affected body composition, and none of the soybean
products affected condition factor, dressing percentage or hepatosomat
ic index. Fecal protein excretion was not affected by any of the soybe
an products, while fecal excretion of lipids was significantly increas
ed and fecal dry matter content decreased by all products but SBC. No
specific antinutritional factors could be associated with the nutritiv
e value of the soybean products. The results confirmed the potentially
high value of soybean products in diets for salmonids.