Energy digestibility coefficients of commonly used feedstuffs in different size-classes of Indian major carps, Labeo rohita (Hamilton) and Cirrhinus mrigala (Hamilton)

摘要

The apparent energy digestibility coefficient of nine different feedstuffs were determined for two size-classes of Indian major carps (Labeo rohito and Cirrhinus mrigala, Cyprinidae) using chromic oxide as the indigestible marker. Among the ingredients tested, rice polish showed the lowest while the soybean oil cake showed the highest digestibility in both species. The influence of fish size on energy digestibility was found to be insignificant (P>0.01). Irrespective of fish size, plant and animal origin feed stuffs showed no significant (P>0.01) difference in their digestibility in both species. Only the animal origin feed stuffs, in both size-classes, exhibited species dependent variability in their digestibility.