Population Structure, Composition and Abundance of Elephants Elephas Maximus in Minneriya National Park, Sri Lanka

Submitted by Naturenomics Team on Sat, 29/07/2017 - 09:11
Journal of the Bombay Natural History Society
Abstract

The Minneriya National Park was established mainly to enhance the long-term survival of the Asian elephant (Elephas maximus) in a predominantly agricultural area in Sri Lanka. The ancient reservoir, after which the Park is named, is seasonally home to large numbers of elephants because of the availability of water and the extensive areas of grassland created by fluctuations in the water level. In a preliminary study carried out from September 2000 to August 2001, a total of 974 elephants were recorded, of which 797 were classified according to age and sex. A quarter of the observations referred to solitary males. The most frequently observed grouping comprised 5-10 individuals that represent the family unit. The population structure appears to be equally divided between the adults and other categories. The observed mean adult male:female sex ratio was 1:2.9, close to the national average of 1:3. Large groupings of elephant were observed when the drop in water level in the reservoir resulted in increase in the area of the grazing grounds. The largest group observed comprised 70 animals were observed emerging from the forest to feed on the grasslands between 1600-1700 hrs in the evening. During the rainy season, as the water level in the reservoir increased, flooding the grazing grounds, elephants moved to areas outside the Park, causing conflict with the farming community. The gradual build up of elephants in the Park leading to the observed maximum of 319 animals, translates into a crude density of 3.6 animals per sq. km, which is among the highest densities recorded in Aisa. Therefore Minneriya National Park represents one of the important area can only be assured if appropriate measures are adopted to reduce the human-elephant conflict.

Keywords: elephant, Elephas maximus, Minneriya National Park, Sri Lanka

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