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Ecological separation of the large mammal species in the Tarangire Game Reserve, Tanganyika

The ecological separation of 14 common ungulate species living in close contact with each other in a Tanganyika game reserve is shown to be achieved by six different factors: 1. the occupation of different vegetation types and broad habitats; 2. the selection of different types of food; 3. the occupation of different areas at the same season; 4. the occupation of the same area at different seasons; 5. the use of different feeding levels in the vegetation; 6. the occupation

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The impacts of elephant, giraffe and fire upon the Acacia tortilis woodlands of the Serengeti

The reduction in canopy cover of the Seronera woodlands since the mid- 1960s can be largely attributed to the destruction of mature Acacia tortilis trees by elephants. The development of the tree regeneration that has colonized the gaps in the mature canopy is being suppressed by giraffe browsing and periodic burning. A simple model is presented which simulates these impacts upon the dynamics of the A. tortilis population. Height-specific impact rates of these three agents are quantified. Between 1968 and

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The giraffe and its food resource in the Serengeti

The dynamics of the giraffe population of the Serengeti were quantified to ascertain the response of the population to the increasing biomass of the available browse resource. Aerial counts conducted in 1971 and 1976 together with analyses of fecundity and mortality data suggest a rate of population increase of some 5–6% per annum. Compared with the dynamics of a stable giraffe population in Nairobi National Park, the sub-adult components of the Serengeti regional populations are larger and juvenile growth rates

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