Feeding ecology of spider monkeys (Ateles geoffroyi) at Tikal,Guatemala |
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Authors: | J. G. H. Cant |
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Affiliation: | (1) Department of Anatomy School of Medicine, University of Puerto Rico, G.P.O. Box 5067, 00936 San Juan, PR |
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Abstract: | Field study in tropical dry forest in Tikal National Park, Guatemala, revealed that spider monkeys (Ateles geoffroyi) devoted about 57% of feeding time to fruit (pulp), 20% to the unripe seeds of a single tree species, and the remainder largely to leaves and buds. Fruit, seeds, flowers and leaves ofBrosimum alicastrum (Moraceae) accounted for 56% of the diet, and there was very little predation on invertebrates. A severe drought occurred during 1975, the first year of the study, and a comparison between July of that year with July, 1978 shows that in the drought year there was heavier than normal reliance on fruit of the genusFicus (46% versus 14%) and depressed consumption ofBrosimum (11% vs. 54%). Dietary species diversity (Shannon's measureH) and evenness (Hill'sE) were markedly higher during the drought July than the normal July. |
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