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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Nutritional composition of the diet of the gorilla (Gorilla beringei): A comparison between two montane habitats
Journal of Tropical Ecology, Volume 23, No. 6, Year 2007
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Description
The mountain gorilla (Gorilla beringei beringei) lives in two geographically separated populations, Bwindi Impenetrable National Park, Uganda and in three national parks spanning the Virunga mountain region in Rwanda, Democratic Republic of Congo, and Uganda. The altitude, climate and plant composition of these habitats differ. Our goal was to compare the diets of gorillas living in each of these habitats. The nutrients in staple foods and in the diets of individuals in a group of gorillas in Bwindi (N = 12 individuals) and a group in the Virungas (N = 7 individuals) were compared to determine if differences in dietary composition affected concentrations of nutrients in their diets. At both sites gorilla diets consisted primarily of herbaceous leaves, but the diet of Bwindi gorillas contained more tree leaves, fruit, pith and dry wood, and fewer stems. Despite differences in habitat and dietary composition, the nutrient concentrations in both gorilla diets were remarkably similar. On a dry matter basis, the diets and staple foods of Bwindi and Virunga gorillas contained similar concentrations of crude protein (CP), fibre (NDF) and non-structural carbohydrates (TNC). Bwindi gorillas ate diets containing 18% CP, 43% NDF and 19% TNC on a dry-matter basis, while the diets of the Virunga gorillas contained 17% CP, 41% NDF and 18% TNC. Our results demonstrate that gorillas consume diets that differ by plant species and part, but contain similar concentrations of nutrients. This suggests that classifying animals by broad dietary strategy (e.g. frugivory and folivory) does not provide a reliable indicator of the nutritional quality of their diet, and that our previous assumptions about these categories should be re-evaluated. Copyright © 2007 Cambridge University Press.
Authors & Co-Authors
Rothman, Jessica M.
United States, Ithaca
Cornell University
Canada, Sainte-anne-de-bellevue
Mcgill University, Macdonald Campus
Plumptre, Andrew J.
Uganda, Kampala
Wildlife Conservation Society Uganda
Dierenfeld, Ellen S.
United States, Ithaca
Cornell University
United States, New York
Wildlife Conservation Society
Pell, Alice Nelson
United States, Ithaca
Cornell University
Statistics
Citations: 98
Authors: 4
Affiliations: 4
Identifiers
Doi:
10.1017/S0266467407004555
ISSN:
02664674
e-ISSN:
14697831
Study Locations
Congo
Rwanda
Uganda