versus 61%, Pb 0.01) (Table 3). It is possible that since the diet offered was
not pelleted, selection of the palatable portions of the forage by a given
species could result in the difference in digestibility. Exposure of the
Grant's gazelle to an intermittent heat load at 40 °C for 12 h each day
resulted in a 14% reduction in food intake. Conversely, when the Oryx
was exposed to a similar environment, no change was noted in food
intake (Table 1). No significant change (PN0. 05) in digestibility was
observed in both the Grant's gazelle and Oryx when both species were
exposed to an intermittent heat load (Table 3). It is important to note
that, while the food intake of the Oryx increased during heat loading,
faecal dry matter output also increased (Tables 2 and 3) presumably
resulting in the non-significant digestibility values.