• Adaptive Strategies of Desert Grasses in Saudi Arabia

      Bokhari, U. G.; Alyaeesh, F.; Al-Nori, M. (Society for Range Management, 1987-01-01)
      Adaptive strategies of dominant grasses in terms of stomatal resistance, rate of transpiration and photosynthesis, water potential of plants, and soil and water-use-efficiency were studied at 3 locations in the Kingdom. The locations chosen represented 3 different contrasting soil and climatic conditions of the regions. Results indicated that the desert plants have developed strategies to adjust stomatal behavior, rate of transpiration and water potential to cope with the harsh environment of the desert. The strategies involved appear to ensure survival of the species rather than high productivity.
    • Livestock and Wildlife Population Distributions in Relation to Aridity and Human Population in Kenya

      Peden, D. G. (Society for Range Management, 1987-01-01)
      In response to the demand for inventories of livestock and wildlife populations in Kenya, animal censuses were completed during the period 1977 to 1983 using low level, systematic reconnaissance flights. Total stocking levels, ratios of livestock to wildlife, and ratios of cattle to sheep and goats were estimated in terms of tropial animal units for each administrative district. The total stocking level, the ratio of cattle to sheep and goats, and human population density were negatively correlated to aridity. In the driest districts, livestock were low in absolute density but their per capita importance to the human population was high.
    • Seasonal Diets of Camels, Cattle, Sheep, and Goats in a Common Range in Eastern Africa

      Migongo-Bake, W.; Hansen, R. M. (Society for Range Management, 1987-01-01)
      Although there have been several reports on the food habits of domestic herbivores in various semiarid regions of the world, there has been no previous report on the partitioning of forage resources by camels (Camelus dromedarius) and sheep (Ovis aries), goats (Capra hircus) and cattle (Bos indicus) using a common range. In the semiarid region of northern Kenya, the seasonal exploitation by these herbivores resulting from herding by the nomadic Rendille pastoralists makes the system for management of these rangelands very complex. Information on the food habits of animals utilizing a common range is important in offering a basis for assessing the usefulness of the range components to the animals. Consequently, food habits information becomes an important tool in making management decisions. Camels were predominantly browsers while cattle were predominantly grazers. Sheep and goats were intermediate feeders. Cattle browsed most during the 'green' season when the browse shoots were most abundant and easiest for their large mouth parts to harvest. Camels grazed most during the very dry season when most trees and shrubs had shed their leaves. The observed variations in food habits among the 4 herbivores suggest that they may require different management to obtain optimum production.