In order to prevent
accumulation on absorbed nutrient in the blood and to reduce the energy
expenditure on digestion, the ADC might be reduced. Various studies
(Mahmoud, 2009; Rašković et al., 2011) suggested intestinal morphological
change can explain difference in ADC between diets. An alternative
explanation for the reduced nutrient digestibility at hypoxia might
be due to changes in intestinalmorphology.