Asian Fisheries Society

Effect of Inclusion Level and Time on Apparent Digestibility of Solvent-Extracted Soybean Meal for Common Carp (Cyprinus carpio, Cyprinidae)


Apparent digestibility of solvent-extracted soybean meal (SBM) was determined at four levels of inclusion (10, 20, 30 and 40%) and over two periods of time (days 9-17 and days 19-24) for common carp (Cyprinus carpio, Cyprinidae). Solvent-extracted SBM was incorporated into a casein-based reference diet, and chromium oxide (1%) was used as an external marker. Apparent digestibility of SBM was found to decrease significantly with inclusion (86.3-73.1%) but not time. The digestibility of dietary protein also decreased significantly with inclusion, this was not significant. Dietary lipid and SBM crude energy digestibility were found to increase and decrease, respectively, with time. These results indicate that digestibility of solvent-extracted SBM and its constituent nutrients for common carp may be affected by both level of inclusion and time, and that these factors must be considered when determining digestibility of protein sources for use in the formulation of experimental and commercial diets for this species.

Publication Date : 1997-09-01

Volume : 10

Issue : 1

Page : 65-74

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Date 1997/09/01
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