Age Structure of Elephants in Tsavo National Park, Kenya

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Abstract
The age structure of elephants in several areas of Tsavo East and West National Parks, Kenya, was determined by means of vertical aerial photography and the age-length key of Croze (1972) in 1972 and 1974. The proportion of young (0-5 yr) elephants was substantially reduced in some areas, compared to the situation in 1962-66 and in other populations, due to the 1970-71 drought and continued high juvenile mortality since then. The deficits in the youngest age classes are more pronounced in Tsavo East, where environmental conditions are generally harsher than in Tsavo West. The present elephant population is in a phase of decline, at least in Tsavo East.

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