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A Preliminary Analysis of a Neotropical Mammal Fauna

John F. Eisenberg and Richard W. Thorington, Jr.
Biotropica
Vol. 5, No. 3 (Dec., 1973), pp. 150-161
DOI: 10.2307/2989807
Stable URL: http://www.jstor.org/stable/2989807
Page Count: 12
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
A Preliminary Analysis of a Neotropical Mammal Fauna
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Abstract

The abundance and biomass of species of nonvolant mammals on Barro Colorado Island are estimated and compared with data from other areas. The edentates, particularly the sloths, are shown to be dominant elements in neotropical forests. The sloths and howler monkeys together constitute more than 50 percent of the biomass of mammals, emphasizing the importance of the forest canopy. The bulk of the mammalian biomass is maintained by species which are browsers or frugivores and browsers. The total energy consumption of each species is estimated and the metabolic rate of the whole mammalian fauna is judged to be between 3000 and 4000 kilocalories per hectare per day on Barro Colorado Island.

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