Two questionnaire surveys (2 x 44) were conducted among pastoral households, using three grazing management systems. The average number of Tropical Livestock Units (250 kg) was 4.0 per member of the household. Milk production was the most important source of revenue (66% of the total) followed by sale of livestock (17%) and transport (16%). High mortality rates were recorded for all livestock. About 27% of the milk was sold fresh or as butter. Sedentary and transhumant grazing management systems showed similar levels of income, but nomads had a 2.6-fold higher overall net income. The average total gross income from the entire herd amounted to US$ 6382 per household per year. The calculated costs were 29% of the gross returns. The contribution to the total gross revenues of camels, cattle and small ruminants was 58%, 25% and 17%, respectively.